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fix the wrong fan speed in fan1_input when the fan control mode is manual.
the fan speed value is not correct when we set manual mode to fan1_enalbe - 1.
since the fan speed in the metrics table always reflects the real fan speed,we
can fetch the fan speed for both auto and manual mode.
Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Likun Gao <Likun.Gao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Stop registering the SMU i2c bus on navi1x. This leads to instability
issues when userspace processes mess with the bus and also seems to
cause display stability issues in some cases.
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1314
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1341
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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Currently intel_idle driver gets the c-state information from ACPI
_CST if the processor model is not recognized by it. However the
c-state in _CST starts with index 1 which is different from the
index in intel_idle driver's internal c-state table.
While intel_idle_max_cstate_reached() was previously introduced to
deal with intel_idle driver's internal c-state table, re-using
this function directly on _CST is incorrect.
Fix this by subtracting 1 from the index when checking max_cstate
in the _CST case.
For example, append intel_idle.max_cstate=1 in boot command line,
Before the patch:
grep . /sys/devices/system/cpu/cpu0/cpuidle/state*/name
POLL
After the patch:
grep . /sys/devices/system/cpu/cpu0/cpuidle/state*/name
/sys/devices/system/cpu/cpu0/cpuidle/state0/name:POLL
/sys/devices/system/cpu/cpu0/cpuidle/state1/name:C1_ACPI
Fixes: 18734958e9bf ("intel_idle: Use ACPI _CST for processor models without C-state tables")
Reported-by: Pengfei Xu <pengfei.xu@intel.com>
Cc: 5.6+ <stable@vger.kernel.org> # 5.6+
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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If the cpufreq policy max limit is changed when intel_pstate operates
in the passive mode with HWP enabled and the "powersave" governor is
used on top of it, the HWP max limit is not updated as appropriate.
Namely, in the "powersave" governor case, the target P-state
is always equal to the policy min limit, so if the latter does
not change, intel_cpufreq_adjust_hwp() is not invoked to update
the HWP Request MSR due to the "target_pstate != old_pstate" check
in intel_cpufreq_update_pstate(), so the HWP max limit is not
updated as a result.
Also, if the CPUFREQ_NEED_UPDATE_LIMITS flag is not set for the
driver and the target frequency does not change along with the
policy max limit, the "target_freq == policy->cur" check in
__cpufreq_driver_target() prevents the driver's ->target() callback
from being invoked at all, so the HWP max limit is not updated.
To prevent that occurring, set the CPUFREQ_NEED_UPDATE_LIMITS flag
in the intel_cpufreq driver structure if HWP is enabled and modify
intel_cpufreq_update_pstate() to do the "target_pstate != old_pstate"
check only in the non-HWP case and let intel_cpufreq_adjust_hwp()
always run in the HWP case (it will update HWP Request only if the
cached value of the register is different from the new one including
the limits, so if neither the target P-state value nor the max limit
changes, the register write will still be avoided).
Fixes: f6ebbcf08f37 ("cpufreq: intel_pstate: Implement passive mode with HWP enabled")
Reported-by: Zhang Rui <rui.zhang@intel.com>
Cc: 5.9+ <stable@vger.kernel.org> # 5.9+: 1c534352f47f cpufreq: Introduce CPUFREQ_NEED_UPDATE_LIMITS ...
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Zhang Rui <rui.zhang@intel.com>
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Generally, a cpufreq driver may need to update some internal upper
and lower frequency boundaries on policy max and min changes,
respectively, but currently this does not work if the target
frequency does not change along with the policy limit.
Namely, if the target frequency does not change along with the
policy min or max, the "target_freq == policy->cur" check in
__cpufreq_driver_target() prevents driver callbacks from being
invoked and they do not even have a chance to update the
corresponding internal boundary.
This particularly affects the "powersave" and "performance"
governors that always set the target frequency to one of the
policy limits and it never changes when the other limit is updated.
To allow cpufreq the drivers needing to update internal frequency
boundaries on policy limits changes to avoid this issue, introduce
a new driver flag, CPUFREQ_NEED_UPDATE_LIMITS, that (when set) will
neutralize the check mentioned above.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
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Commit 33aa46f252c7 ("cpufreq: intel_pstate: Use passive mode by
default without HWP") was meant to cause intel_pstate to be used
in the passive mode with the schedutil governor on top of it, but
it missed the case in which either "ondemand" or "conservative"
was selected as the default governor in the existing kernel config,
in which case the previous old governor configuration would be used,
causing the default legacy governor to be used on top of intel_pstate
instead of schedutil.
Address this by preventing "ondemand" and "conservative" from being
configured as the default cpufreq governor in the case when schedutil
is the default choice for the default governor setting.
[Note that the default cpufreq governor can still be set via the
kernel command line if need be and that choice is not limited,
so if anyone really wants to use one of the legacy governors by
default, it can be achieved this way.]
Fixes: 33aa46f252c7 ("cpufreq: intel_pstate: Use passive mode by default without HWP")
Reported-by: Julia Lawall <julia.lawall@inria.fr>
Cc: 5.8+ <stable@vger.kernel.org> # 5.8+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
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A 'break' following a 'return' statement is pointless, so remove it.
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree fixes from Rob Herring:
- More binding additionalProperties/unevaluatedProperties additions
- More yamllint fixes on additions in the merge window
- CrOS embedded controller schema updates to fix warnings
- LEDs schema update adding ID_RGB
- A reserved-memory fix for regions starting at address 0x0
* tag 'devicetree-fixes-for-5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
dt-bindings: Another round of adding missing 'additionalProperties/unevalutatedProperties'
dt-bindings: Explicitly allow additional properties in board/SoC schemas
dt-bindings: More whitespace clean-ups in schema files
mfd: google,cros-ec: add missing properties
dt-bindings: input: convert cros-ec-keyb to json-schema
dt-bindings: i2c: convert i2c-cros-ec-tunnel to json-schema
of: Fix reserved-memory overlap detection
dt-bindings: mailbox: mtk-gce: fix incorrect mbox-cells value
dt-bindings: leds: Update devicetree documents for ID_RGB
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There is a problem that if vc4_drm bind fails, a memory leak occurs on
the drm_property_create side. Add error handding for drm_mode_config.
Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20201027041442.30352-2-hoegeun.kwon@samsung.com
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In addition to the rest of Qcom interconnect drivers use icc_sync_state
for SM8150/SM8250 interconnect drivers to notify the interconnect
framework when all consumers are probed and there is no need to keep the
bandwidth set to maximum anymore.
Also move the BCM initialization before creating the nodes to set the
max bandwidth in hardware for the initialization/probing stage.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: 7d3b0b0d8184 ("interconnect: qcom: Use icc_sync_state")
Link: https://lore.kernel.org/r/20201027133418.976687-1-dmitry.baryshkov@linaro.org
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
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In current code, controller_probe() misses to call ida_simple_remove()
in an error path. Jump to correct label to fix it.
Fixes: 17614978ed34 ("staging: fieldbus: anybus-s: support the Arcx anybus controller")
Reviewed-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201012132404.113031-1-jingxiangfeng@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The commit 8522d62e6bca ("staging: wfx: gpiod_get_value() can return an
error") has changed the way the driver test the value returned by
gpiod_get_value(). The new code was wrong.
Fixes: 8522d62e6bca ("staging: wfx: gpiod_get_value() can return an error")
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20201019160604.1609180-2-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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With -Wuninitialized, the compiler complains:
drivers/staging/wfx/data_tx.c:34:19: warning: variable 'band' is uninitialized when used here [-Wuninitialized]
if (rate->idx >= band->n_bitrates) {
^~~~
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Fixes: 868fd970e187 ("staging: wfx: improve robustness of wfx_get_hw_rate()")
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Link: https://lore.kernel.org/r/20201019160604.1609180-1-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The vchiq_instance is allocated with vchiq_initialise() but never
freed properly. Fix memory leak for the vchiq_instance.
Reported-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Link: https://lore.kernel.org/r/1603706150-10806-1-git-send-email-sw0312.kim@samsung.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The "cb_pcidas" driver supports asynchronous commands on the analog
output (AO) subdevice for those boards that have an AO FIFO. The code
(in `cb_pcidas_ao_check_chanlist()` and `cb_pcidas_ao_cmd()`) to
validate and set up the command supports output to a single channel or
to two channels simultaneously (the boards have two AO channels).
However, the code in `cb_pcidas_auto_attach()` that initializes the
subdevices neglects to initialize the AO subdevice's `len_chanlist`
member, leaving it set to 0, but the Comedi core will "correct" it to 1
if the driver neglected to set it. This limits commands to use a single
channel (either channel 0 or 1), but the limit should be two channels.
Set the AO subdevice's `len_chanlist` member to be the same value as the
`n_chan` member, which will be 2.
Cc: <stable@vger.kernel.org>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20201021122142.81628-1-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Currently in case of alignment or FCS error if the packet cannot be
corrected it's still not dropped. Report the error properly and drop the
packet while making the code around a little bit more readable.
Fixes: 80ff0fd3ab64 ("Staging: Add octeon-ethernet driver files.")
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201016145630.41852-1-alexander.sverdlin@nokia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The PHYs must be registered once in device probe function, not in device
open callback because it's only possible to register them once.
Fixes: a25e278020bf ("staging: octeon: support fixed-link phys")
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201016101858.11374-1-alexander.sverdlin@nokia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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As reported by "make htmldocs":
./drivers/gpu/drm/drm_prime.c:808: warning: Function parameter or member 'dev' not described in 'drm_prime_pages_to_sg'
Add a description for the new parameter.
Fixes: 707d561f77b5 ("drm: allow limiting the scatter list size.")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/9366f48e6e9c3ec2f31a3e68452a2b23a1089fce.1603791716.git.mchehab+huawei@kernel.org
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The name of the argument is different, causing those warnings:
./drivers/gpu/drm/drm_edid.c:3754: warning: Function parameter or member 'video_code' not described in 'drm_display_mode_from_cea_vic'
./drivers/gpu/drm/drm_edid.c:3754: warning: Excess function parameter 'vic' description in 'drm_display_mode_from_cea_vic'
Fixes: 7af655bce275 ("drm/dp: Add drm_dp_downstream_mode()")
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/7f4d6c3ff6df63ebd006eb90a5108006c23e2168.1603791716.git.mchehab+huawei@kernel.org
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As warned by kernel-doc:
./drivers/gpu/drm/drm_dp_helper.c:385: warning: Function parameter or member 'type' not described in 'drm_dp_downstream_is_type'
./drivers/gpu/drm/drm_dp_helper.c:886: warning: Function parameter or member 'dev' not described in 'drm_dp_downstream_mode'
Some function parameters weren't documented.
Fixes: 38784f6f8805 ("drm/dp: Add helpers to identify downstream facing port types")
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/03c9c8ba3f492aca76e2b4836803219cd9c971cf.1603791716.git.mchehab+huawei@kernel.org
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Changeset e5b92773287c ("drm: report dp downstream port type as a subconnector property")
added a new function to the kAPI, but didn't add any documentation
for the parameters for drm_dp_set_subconnector_property().
Fixes: e5b92773287c ("drm: report dp downstream port type as a subconnector property")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/0870be85a77bea4ba5cf1715010834289a4e10b1.1603791716.git.mchehab+huawei@kernel.org
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When fetch 'event' from event queue, after copy its address
space content to user space, the 'event' the memory space
pointed to by the 'event' pointer need be freed.
BUG: memory leak
unreferenced object 0xffff888110622660 (size 32):
comm "softirq", pid 0, jiffies 4294941981 (age 12.480s)
hex dump (first 32 bytes):
02 00 00 00 08 00 00 00 80 06 00 01 00 00 40 00 ..............@.
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000efd29abd>] kmalloc include/linux/slab.h:554 [inline]
[<00000000efd29abd>] raw_event_queue_add drivers/usb/gadget/legacy/raw_gadget.c:66 [inline]
[<00000000efd29abd>] raw_queue_event drivers/usb/gadget/legacy/raw_gadget.c:225 [inline]
[<00000000efd29abd>] gadget_setup+0xf6/0x220 drivers/usb/gadget/legacy/raw_gadget.c:343
[<00000000952c4a46>] dummy_timer+0xb9f/0x14c0 drivers/usb/gadget/udc/dummy_hcd.c:1899
[<0000000074ac2c54>] call_timer_fn+0x38/0x200 kernel/time/timer.c:1415
[<00000000560a3a79>] expire_timers kernel/time/timer.c:1460 [inline]
[<00000000560a3a79>] __run_timers.part.0+0x319/0x400 kernel/time/timer.c:1757
[<000000009d9503d0>] __run_timers kernel/time/timer.c:1738 [inline]
[<000000009d9503d0>] run_timer_softirq+0x3d/0x80 kernel/time/timer.c:1770
[<000000009df27c89>] __do_softirq+0xcc/0x2c2 kernel/softirq.c:298
[<000000007a3f1a47>] asm_call_irq_on_stack+0xf/0x20
[<000000004a62cc2e>] __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
[<000000004a62cc2e>] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
[<000000004a62cc2e>] do_softirq_own_stack+0x32/0x40 arch/x86/kernel/irq_64.c:77
[<00000000b0086800>] invoke_softirq kernel/softirq.c:393 [inline]
[<00000000b0086800>] __irq_exit_rcu kernel/softirq.c:423 [inline]
[<00000000b0086800>] irq_exit_rcu+0x91/0xc0 kernel/softirq.c:435
[<00000000175f9523>] sysvec_apic_timer_interrupt+0x36/0x80 arch/x86/kernel/apic/apic.c:1091
[<00000000a348e847>] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
[<0000000060661100>] native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
[<0000000060661100>] arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
[<0000000060661100>] acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline]
[<0000000060661100>] acpi_idle_do_entry+0xc3/0xd0 drivers/acpi/processor_idle.c:517
[<000000003f413b99>] acpi_idle_enter+0x128/0x1f0 drivers/acpi/processor_idle.c:648
[<00000000f5e5afb8>] cpuidle_enter_state+0xc9/0x650 drivers/cpuidle/cpuidle.c:237
[<00000000d50d51fc>] cpuidle_enter+0x29/0x40 drivers/cpuidle/cpuidle.c:351
[<00000000d674baed>] call_cpuidle kernel/sched/idle.c:132 [inline]
[<00000000d674baed>] cpuidle_idle_call kernel/sched/idle.c:213 [inline]
[<00000000d674baed>] do_idle+0x1c8/0x250 kernel/sched/idle.c:273
Reported-by: syzbot+bd38200f53df6259e6bf@syzkaller.appspotmail.com
Signed-off-by: Zqiang <qiang.zhang@windriver.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
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The error_debugfs label is only used when either
CONFIG_USB_DWC2_PERIPHERAL or CONFIG_USB_DWC2_DUAL_ROLE is enabled. Add
the same #if to the error_debugfs label itself as the code which uses
this label already has.
This avoids the following compiler warning:
warning: label ‘error_debugfs’ defined but not used [-Wunused-label]
Fixes: e1c08cf23172ed ("usb: dwc2: Add missing cleanups when usb_add_gadget_udc() fails")
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
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If we want to send a control status on our own time (through
delayed_status), make sure to handle a case where we may queue the
delayed status before the host requesting for it (when XferNotReady
is generated). Otherwise, the driver won't send anything because it's
not EP0_STATUS_PHASE yet. To resolve this, regardless whether
dwc->ep0state is EP0_STATUS_PHASE, make sure to clear the
dwc->delayed_status flag if dwc3_ep0_send_delayed_status() is called.
The control status can be sent when the host requests it later.
Cc: <stable@vger.kernel.org>
Fixes: d97c78a1908e ("usb: dwc3: gadget: END_TRANSFER before CLEAR_STALL command")
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
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clang warns about functions returning a 'const int' result:
drivers/gpu/drm/imx/imx-tve.c:487:8: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
Remove the extraneous 'const' qualifier here. I would guess that the
function was intended to be marked __attribute__((const)) instead,
but that would also be wrong since it call other functions without
that attribute.
Fixes: fcbc51e54d2a ("staging: drm/imx: Add support for Television Encoder (TVEv2)")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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The edid_len variable is never used again. Use a local variable instead
of storing it in the device structure.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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Remove leftover container_of helper, it has been replaced by
bridge_to_imxpd().
Fixes: fe141cedc433 ("drm/imx: pd: Use bus format/flags provided by the bridge when available")
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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The edid memory is only freed if the component.unbind() is called. This
is okay if the parallel-display was bound but if the bind() fails we
leak the memory.
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
[p.zabel@pengutronix.de: rebased, dropped now empty unbind()]
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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The edid_len variable is never used again. Use a local variable instead
of storing it in the device structure.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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When target side trace in turned on and flush command is issued from the
host it results in the following Oops.
[ 856.789724] BUG: kernel NULL pointer dereference, address: 0000000000000068
[ 856.790686] #PF: supervisor read access in kernel mode
[ 856.791262] #PF: error_code(0x0000) - not-present page
[ 856.791863] PGD 6d7110067 P4D 6d7110067 PUD 66f0ad067 PMD 0
[ 856.792527] Oops: 0000 [#1] SMP NOPTI
[ 856.792950] CPU: 15 PID: 7034 Comm: nvme Tainted: G OE 5.9.0nvme-5.9+ #71
[ 856.793790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e3214
[ 856.794956] RIP: 0010:trace_event_raw_event_nvmet_req_init+0x13e/0x170 [nvmet]
[ 856.795734] Code: 41 5c 41 5d c3 31 d2 31 f6 e8 4e 9b b8 e0 e9 0e ff ff ff 49 8b 55 00 48 8b 38 8b 0
[ 856.797740] RSP: 0018:ffffc90001be3a60 EFLAGS: 00010246
[ 856.798375] RAX: 0000000000000000 RBX: ffff8887e7d2c01c RCX: 0000000000000000
[ 856.799234] RDX: 0000000000000020 RSI: 0000000057e70ea2 RDI: ffff8887e7d2c034
[ 856.800088] RBP: ffff88869f710578 R08: ffff888807500d40 R09: 00000000fffffffe
[ 856.800951] R10: 0000000064c66670 R11: 00000000ef955201 R12: ffff8887e7d2c034
[ 856.801807] R13: ffff88869f7105c8 R14: 0000000000000040 R15: ffff88869f710440
[ 856.802667] FS: 00007f6a22bd8780(0000) GS:ffff888813a00000(0000) knlGS:0000000000000000
[ 856.803635] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 856.804367] CR2: 0000000000000068 CR3: 00000006d73e0000 CR4: 00000000003506e0
[ 856.805283] Call Trace:
[ 856.805613] nvmet_req_init+0x27c/0x480 [nvmet]
[ 856.806200] nvme_loop_queue_rq+0xcb/0x1d0 [nvme_loop]
[ 856.806862] blk_mq_dispatch_rq_list+0x123/0x7b0
[ 856.807459] ? kvm_sched_clock_read+0x14/0x30
[ 856.808025] __blk_mq_sched_dispatch_requests+0xc7/0x170
[ 856.808708] blk_mq_sched_dispatch_requests+0x30/0x60
[ 856.809372] __blk_mq_run_hw_queue+0x70/0x100
[ 856.809935] __blk_mq_delay_run_hw_queue+0x156/0x170
[ 856.810574] blk_mq_run_hw_queue+0x86/0xe0
[ 856.811104] blk_mq_sched_insert_request+0xef/0x160
[ 856.811733] blk_execute_rq+0x69/0xc0
[ 856.812212] ? blk_mq_rq_ctx_init+0xd0/0x230
[ 856.812784] nvme_execute_passthru_rq+0x57/0x130 [nvme_core]
[ 856.813461] nvme_submit_user_cmd+0xeb/0x300 [nvme_core]
[ 856.814099] nvme_user_cmd.isra.82+0x11e/0x1a0 [nvme_core]
[ 856.814752] blkdev_ioctl+0x1dc/0x2c0
[ 856.815197] block_ioctl+0x3f/0x50
[ 856.815606] __x64_sys_ioctl+0x84/0xc0
[ 856.816074] do_syscall_64+0x33/0x40
[ 856.816533] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 856.817168] RIP: 0033:0x7f6a222ed107
[ 856.817617] Code: 44 00 00 48 8b 05 81 cd 2c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 8
[ 856.819901] RSP: 002b:00007ffca848f058 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
[ 856.820846] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6a222ed107
[ 856.821726] RDX: 00007ffca848f060 RSI: 00000000c0484e43 RDI: 0000000000000003
[ 856.822603] RBP: 0000000000000003 R08: 000000000000003f R09: 0000000000000005
[ 856.823478] R10: 00007ffca848ece0 R11: 0000000000000202 R12: 00007ffca84912d3
[ 856.824359] R13: 00007ffca848f4d0 R14: 0000000000000002 R15: 000000000067e900
[ 856.825236] Modules linked in: nvme_loop(OE) nvmet(OE) nvme_fabrics(OE) null_blk nvme(OE) nvme_corel
Move the nvmet_req_init() tracepoint after we parse the command in
nvmet_req_init() so that we can get rid of the duplicate
nvmet_find_namespace() call.
Rename __assign_disk_name() -> __assign_req_name(). Now that we call
tracepoint after parsing the command simplify the newly added
__assign_req_name() which fixes this bug.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
|
|
__nvme_fc_terminate_io() is now called by only 1 place, in reset_work.
Consoldate and move the functionality of terminate_io into reset_work.
In reset_work, rather than calling the create_association directly,
schedule the connect work element to do its thing. After scheduling,
flush the connect work element to continue with semantic of not
returning until connect has been attempted at least once.
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
|
|
nvme_fc_error_recovery() special cases handling when in CONNECTING state
and calls __nvme_fc_terminate_io(). __nvme_fc_terminate_io() itself
special cases CONNECTING state and calls the routine to abort outstanding
ios.
Simplify the sequence by putting the call to abort outstanding I/Os
directly in nvme_fc_error_recovery.
Move the location of __nvme_fc_abort_outstanding_ios(), and
nvme_fc_terminate_exchange() which is called by it, to avoid adding
function prototypes for nvme_fc_error_recovery().
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
|
|
err_work was created to handle errors (mainly I/O timeouts) while in
CONNECTING state. The flag for err_work_active is also unneeded.
Remove err_work_active and err_work. The actions to abort I/Os are moved
inline to nvme_error_recovery().
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
|
|
Whenever there are errors during CONNECTING, the driver recovers by
aborting all outstanding ios and counts on the io completion to fail them
and thus the connection/association they are on. However, the connection
failure depends on a failure state from the core routines. Not all
commands that are issued by the core routine are guaranteed to cause a
failure of the core routine. They may be treated as a failure status and
the status is then ignored.
As such, whenever the transport enters error_recovery while CONNECTING,
it will set a new flag indicating an association failed. The
create_association routine which creates and initializes the controller,
will monitor the state of the flag as well as the core routine error
status and ensure the association fails if there was an error.
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
|
|
Receiving a zero length message leads to the following warnings because
the CQE is processed twice:
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 0 at lib/refcount.c:28
RIP: 0010:refcount_warn_saturate+0xd9/0xe0
Call Trace:
<IRQ>
nvme_rdma_recv_done+0xf3/0x280 [nvme_rdma]
__ib_process_cq+0x76/0x150 [ib_core]
...
Sanity check the received data length, to avoids this.
Thanks to Chao Leng & Sagi for suggestions.
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
|
|
Revalidating nvme zoned namespaces requires IO commands, and there are
controller states that prevent IO. For example, a sanitize in progress
is required to fail all IO, but we don't want to remove a namespace
we've previously added just because the controller is in such a state.
Suppress the error in this case.
Reported-by: Michael Nguyen <michael.nguyen@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
|
|
fsl_ep_fifo_status() should return error if _ep->desc is null.
Fixes: 75eaa498c99e (“usb: gadget: Correct NULL pointer checking in fsl gadget”)
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
|
|
goku_probe() goes to error label "err" and invokes goku_remove()
in case of failures of pci_enable_device(), pci_resource_start()
and ioremap(). goku_remove() gets a device from
pci_get_drvdata(pdev) and works with it without any checks, in
particular it dereferences a corresponding pointer. But
goku_probe() did not set this device yet. So, one can expect
various crashes. The patch moves setting the device just after
allocation of memory for it.
Found by Linux Driver Verification project (linuxtesting.org).
Reported-by: Pavel Andrianov <andrianov@ispras.ru>
Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
|
|
There is a lot of stuff here which can be done outside of the big
opp_table_lock, do that. This helps avoiding few circular dependency
lockdeps around debugfs and interconnects.
Reported-by: Rob Clark <robdclark@gmail.com>
Reported-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
|
|
This patch adds the necessary PCI ID for Intel Alder Lake-S
devices.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
|
|
We returned earlier by mistake even when there were no failures. Fix it.
Fixes: dd461cd9183f ("opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER")
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.com>
|
|
The patch missed returning 0 early in case of success and hence the
static OPPs got removed by mistake. Fix it.
Fixes: 90d46d71cce2 ("opp: Handle multiple calls for same OPP table in _of_add_opp_table_v1()")
Reported-by: Aisheng Dong <aisheng.dong@nxp.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Dong Aisheng <aisheng.dong@nxp.com>
|
|
When unbinding the hns3 driver with the HNS3 VF, I got the following
kernel panic:
[ 265.709989] Unable to handle kernel paging request at virtual address ffff800054627000
[ 265.717928] Mem abort info:
[ 265.720740] ESR = 0x96000047
[ 265.723810] EC = 0x25: DABT (current EL), IL = 32 bits
[ 265.729126] SET = 0, FnV = 0
[ 265.732195] EA = 0, S1PTW = 0
[ 265.735351] Data abort info:
[ 265.738227] ISV = 0, ISS = 0x00000047
[ 265.742071] CM = 0, WnR = 1
[ 265.745055] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000009b54000
[ 265.751753] [ffff800054627000] pgd=0000202ffffff003, p4d=0000202ffffff003, pud=00002020020eb003, pmd=00000020a0dfc003, pte=0000000000000000
[ 265.764314] Internal error: Oops: 96000047 [#1] SMP
[ 265.830357] CPU: 61 PID: 20319 Comm: bash Not tainted 5.9.0+ #206
[ 265.836423] Hardware name: Huawei TaiShan 2280 V2/BC82AMDDA, BIOS 1.05 09/18/2019
[ 265.843873] pstate: 80400009 (Nzcv daif +PAN -UAO -TCO BTYPE=--)
[ 265.843890] pc : hclgevf_cmd_uninit+0xbc/0x300
[ 265.861988] lr : hclgevf_cmd_uninit+0xb0/0x300
[ 265.861992] sp : ffff80004c983b50
[ 265.881411] pmr_save: 000000e0
[ 265.884453] x29: ffff80004c983b50 x28: ffff20280bbce500
[ 265.889744] x27: 0000000000000000 x26: 0000000000000000
[ 265.895034] x25: ffff800011a1f000 x24: ffff800011a1fe90
[ 265.900325] x23: ffff0020ce9b00d8 x22: ffff0020ce9b0150
[ 265.905616] x21: ffff800010d70e90 x20: ffff800010d70e90
[ 265.910906] x19: ffff0020ce9b0080 x18: 0000000000000004
[ 265.916198] x17: 0000000000000000 x16: ffff800011ae32e8
[ 265.916201] x15: 0000000000000028 x14: 0000000000000002
[ 265.916204] x13: ffff800011ae32e8 x12: 0000000000012ad8
[ 265.946619] x11: ffff80004c983b50 x10: 0000000000000000
[ 265.951911] x9 : ffff8000115d0888 x8 : 0000000000000000
[ 265.951914] x7 : ffff800011890b20 x6 : c0000000ffff7fff
[ 265.951917] x5 : ffff80004c983930 x4 : 0000000000000001
[ 265.951919] x3 : ffffa027eec1b000 x2 : 2b78ccbbff369100
[ 265.964487] x1 : 0000000000000000 x0 : ffff800054627000
[ 265.964491] Call trace:
[ 265.964494] hclgevf_cmd_uninit+0xbc/0x300
[ 265.964496] hclgevf_uninit_ae_dev+0x9c/0xe8
[ 265.964501] hnae3_unregister_ae_dev+0xb0/0x130
[ 265.964516] hns3_remove+0x34/0x88 [hns3]
[ 266.009683] pci_device_remove+0x48/0xf0
[ 266.009692] device_release_driver_internal+0x114/0x1e8
[ 266.030058] device_driver_detach+0x28/0x38
[ 266.034224] unbind_store+0xd4/0x108
[ 266.037784] drv_attr_store+0x40/0x58
[ 266.041435] sysfs_kf_write+0x54/0x80
[ 266.045081] kernfs_fop_write+0x12c/0x250
[ 266.049076] vfs_write+0xc4/0x248
[ 266.052378] ksys_write+0x74/0xf8
[ 266.055677] __arm64_sys_write+0x24/0x30
[ 266.059584] el0_svc_common.constprop.3+0x84/0x270
[ 266.064354] do_el0_svc+0x34/0xa0
[ 266.067658] el0_svc+0x38/0x40
[ 266.070700] el0_sync_handler+0x8c/0xb0
[ 266.074519] el0_sync+0x140/0x180
It looks like the BAR memory region had already been unmapped before we
start clearing CMDQ registers in it, which is pretty bad and the kernel
happily kills itself because of a Current EL Data Abort (on arm64).
Moving the CMDQ uninitialization a bit early fixes the issue for me.
Fixes: 862d969a3a4d ("net: hns3: do VF's pci re-initialization while PF doing FLR")
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Link: https://lore.kernel.org/r/20201023051550.793-1-yuzenghui@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
In the AER or firmware reset flow, if we are in fatal error state or
if pci_channel_offline() is true, we don't send any commands to the
firmware because the commands will likely not reach the firmware and
most commands don't matter much because the firmware is likely to be
reset imminently.
However, the HWRM_FUNC_RESET command is different and we should always
attempt to send it. In the AER flow for example, the .slot_reset()
call will trigger this fw command and we need to try to send it to
effect the proper reset.
Fixes: b340dc680ed4 ("bnxt_en: Avoid sending firmware messages when AER error is detected.")
Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
bnxt_open_nic() is called during configuration changes that require
the NIC to be closed and then opened. This call is protected by
rtnl_lock. Firmware reset can be happening at the same time. Only
critical portions of the entire firmware reset sequence are protected
by the rtnl_lock. It is possible that bnxt_open_nic() can be called
when the firmware reset sequence is aborting. In that case,
bnxt_open_nic() needs to check if the ABORT_ERR flag is set and
abort if it is. The configuration change that resulted in the
bnxt_open_nic() call will fail but the NIC will be brought to a
consistent IF_DOWN state.
Without this patch, if bnxt_open_nic() were to continue in this error
state, it may crash like this:
[ 1648.659736] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 1648.659768] IP: [<ffffffffc01e9b3a>] bnxt_alloc_mem+0x50a/0x1140 [bnxt_en]
[ 1648.659796] PGD 101e1b3067 PUD 101e1b2067 PMD 0
[ 1648.659813] Oops: 0000 [#1] SMP
[ 1648.659825] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter sunrpc dell_smbios dell_wmi_descriptor dcdbas amd64_edac_mod edac_mce_amd kvm_amd kvm irqbypass crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper vfat cryptd fat pcspkr ipmi_ssif sg k10temp i2c_piix4 wmi ipmi_si ipmi_devintf ipmi_msghandler tpm_crb acpi_power_meter sch_fq_codel ip_tables xfs libcrc32c sd_mod crc_t10dif crct10dif_generic mgag200 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm ahci drm libahci megaraid_sas crct10dif_pclmul crct10dif_common
[ 1648.660063] tg3 libata crc32c_intel bnxt_en(OE) drm_panel_orientation_quirks devlink ptp pps_core dm_mirror dm_region_hash dm_log dm_mod fuse
[ 1648.660105] CPU: 13 PID: 3867 Comm: ethtool Kdump: loaded Tainted: G OE ------------ 3.10.0-1152.el7.x86_64 #1
[ 1648.660911] Hardware name: Dell Inc. PowerEdge R7515/0R4CNN, BIOS 1.2.14 01/28/2020
[ 1648.661662] task: ffff94e64cbc9080 ti: ffff94f55df1c000 task.ti: ffff94f55df1c000
[ 1648.662409] RIP: 0010:[<ffffffffc01e9b3a>] [<ffffffffc01e9b3a>] bnxt_alloc_mem+0x50a/0x1140 [bnxt_en]
[ 1648.663171] RSP: 0018:ffff94f55df1fba8 EFLAGS: 00010202
[ 1648.663927] RAX: 0000000000000000 RBX: ffff94e6827e0000 RCX: 0000000000000000
[ 1648.664684] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff94e6827e08c0
[ 1648.665433] RBP: ffff94f55df1fc20 R08: 00000000000001ff R09: 0000000000000008
[ 1648.666184] R10: 0000000000000d53 R11: ffff94f55df1f7ce R12: ffff94e6827e08c0
[ 1648.666940] R13: ffff94e6827e08c0 R14: ffff94e6827e08c0 R15: ffffffffb9115e40
[ 1648.667695] FS: 00007f8aadba5740(0000) GS:ffff94f57eb40000(0000) knlGS:0000000000000000
[ 1648.668447] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1648.669202] CR2: 0000000000000000 CR3: 0000001022772000 CR4: 0000000000340fe0
[ 1648.669966] Call Trace:
[ 1648.670730] [<ffffffffc01f1d5d>] ? bnxt_need_reserve_rings+0x9d/0x170 [bnxt_en]
[ 1648.671496] [<ffffffffc01fa7ea>] __bnxt_open_nic+0x8a/0x9a0 [bnxt_en]
[ 1648.672263] [<ffffffffc01f7479>] ? bnxt_close_nic+0x59/0x1b0 [bnxt_en]
[ 1648.673031] [<ffffffffc01fb11b>] bnxt_open_nic+0x1b/0x50 [bnxt_en]
[ 1648.673793] [<ffffffffc020037c>] bnxt_set_ringparam+0x6c/0xa0 [bnxt_en]
[ 1648.674550] [<ffffffffb8a5f564>] dev_ethtool+0x1334/0x21a0
[ 1648.675306] [<ffffffffb8a719ff>] dev_ioctl+0x1ef/0x5f0
[ 1648.676061] [<ffffffffb8a324bd>] sock_do_ioctl+0x4d/0x60
[ 1648.676810] [<ffffffffb8a326bb>] sock_ioctl+0x1eb/0x2d0
[ 1648.677548] [<ffffffffb8663230>] do_vfs_ioctl+0x3a0/0x5b0
[ 1648.678282] [<ffffffffb8b8e678>] ? __do_page_fault+0x238/0x500
[ 1648.679016] [<ffffffffb86634e1>] SyS_ioctl+0xa1/0xc0
[ 1648.679745] [<ffffffffb8b93f92>] system_call_fastpath+0x25/0x2a
[ 1648.680461] Code: 9e 60 01 00 00 0f 1f 40 00 45 8b 8e 48 01 00 00 31 c9 45 85 c9 0f 8e 73 01 00 00 66 0f 1f 44 00 00 49 8b 86 a8 00 00 00 48 63 d1 <48> 8b 14 d0 48 85 d2 0f 84 46 01 00 00 41 8b 86 44 01 00 00 c7
[ 1648.681986] RIP [<ffffffffc01e9b3a>] bnxt_alloc_mem+0x50a/0x1140 [bnxt_en]
[ 1648.682724] RSP <ffff94f55df1fba8>
[ 1648.683451] CR2: 0000000000000000
Fixes: ec5d31e3c15d ("bnxt_en: Handle firmware reset status during IF_UP.")
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
When a PCIe fatal error occurs, the internal latched BAR addresses
in the chip get reset even though the BAR register values in config
space are retained.
pci_restore_state() will not rewrite the BAR addresses if the
BAR address values are valid, causing the chip's internal BAR addresses
to stay invalid. So we need to zero the BAR registers during PCIe fatal
error to force pci_restore_state() to restore the BAR addresses. These
write cycles to the BAR registers will cause the proper BAR addresses to
latch internally.
Fixes: 6316ea6db93d ("bnxt_en: Enable AER support.")
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
As part of the commit b148bb238c02
("bnxt_en: Fix possible crash in bnxt_fw_reset_task()."),
cancel_delayed_work_sync() is called only for VFs to fix a possible
crash by cancelling any pending delayed work items. It was assumed
by mistake that the flush_workqueue() call on the PF would flush
delayed work items as well.
As flush_workqueue() does not cancel the delayed workqueue, extend
the fix for PFs. This fix will avoid the system crash, if there are
any pending delayed work items in fw_reset_task() during driver's
.remove() call.
Unify the workqueue cleanup logic for both PF and VF by calling
cancel_work_sync() and cancel_delayed_work_sync() directly in
bnxt_remove_one().
Fixes: b148bb238c02 ("bnxt_en: Fix possible crash in bnxt_fw_reset_task().")
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
A recent patch has moved the workqueue cleanup logic before
calling unregister_netdev() in bnxt_remove_one(). This caused a
regression because the workqueue can be restarted if the device is
still open. Workqueue cleanup must be done after unregister_netdev().
The workqueue will not restart itself after the device is closed.
Call bnxt_cancel_sp_work() after unregister_netdev() and
call bnxt_dl_fw_reporters_destroy() after that. This fixes the
regession and the original NULL ptr dereference issue.
Fixes: b16939b59cc0 ("bnxt_en: Fix NULL ptr dereference crash in bnxt_fw_reset_task()")
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Each EMAD transaction stores the skb used to issue the EMAD request
('trans->tx_skb') so that the request could be retried in case of a
timeout. The skb can be freed when a corresponding response is received
or as part of the retry logic (e.g., failed retransmit, exceeded maximum
number of retries).
The two tasks (i.e., response processing and retransmits) are
synchronized by the atomic 'trans->active' field which ensures that
responses to inactive transactions are ignored.
In case of a failed retransmit the transaction is finished and all of
its resources are freed. However, the current code does not mark it as
inactive. Syzkaller was able to hit a race condition in which a
concurrent response is processed while the transaction's resources are
being freed, resulting in a use-after-free [1].
Fix the issue by making sure to mark the transaction as inactive after a
failed retransmit and free its resources only if a concurrent task did
not already do that.
[1]
BUG: KASAN: use-after-free in consume_skb+0x30/0x370
net/core/skbuff.c:833
Read of size 4 at addr ffff88804f570494 by task syz-executor.0/1004
CPU: 0 PID: 1004 Comm: syz-executor.0 Not tainted 5.8.0-rc7+ #68
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0xf6/0x16e lib/dump_stack.c:118
print_address_description.constprop.0+0x1c/0x250
mm/kasan/report.c:383
__kasan_report mm/kasan/report.c:513 [inline]
kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
check_memory_region_inline mm/kasan/generic.c:186 [inline]
check_memory_region+0x14e/0x1b0 mm/kasan/generic.c:192
instrument_atomic_read include/linux/instrumented.h:56 [inline]
atomic_read include/asm-generic/atomic-instrumented.h:27 [inline]
refcount_read include/linux/refcount.h:147 [inline]
skb_unref include/linux/skbuff.h:1044 [inline]
consume_skb+0x30/0x370 net/core/skbuff.c:833
mlxsw_emad_trans_finish+0x64/0x1c0 drivers/net/ethernet/mellanox/mlxsw/core.c:592
mlxsw_emad_process_response drivers/net/ethernet/mellanox/mlxsw/core.c:651 [inline]
mlxsw_emad_rx_listener_func+0x5c9/0xac0 drivers/net/ethernet/mellanox/mlxsw/core.c:672
mlxsw_core_skb_receive+0x4df/0x770 drivers/net/ethernet/mellanox/mlxsw/core.c:2063
mlxsw_pci_cqe_rdq_handle drivers/net/ethernet/mellanox/mlxsw/pci.c:595 [inline]
mlxsw_pci_cq_tasklet+0x12a6/0x2520 drivers/net/ethernet/mellanox/mlxsw/pci.c:651
tasklet_action_common.isra.0+0x13f/0x3e0 kernel/softirq.c:550
__do_softirq+0x223/0x964 kernel/softirq.c:292
asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
Allocated by task 1006:
save_stack+0x1b/0x40 mm/kasan/common.c:48
set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc mm/kasan/common.c:494 [inline]
__kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:467
slab_post_alloc_hook mm/slab.h:586 [inline]
slab_alloc_node mm/slub.c:2824 [inline]
slab_alloc mm/slub.c:2832 [inline]
kmem_cache_alloc+0xcd/0x2e0 mm/slub.c:2837
__build_skb+0x21/0x60 net/core/skbuff.c:311
__netdev_alloc_skb+0x1e2/0x360 net/core/skbuff.c:464
netdev_alloc_skb include/linux/skbuff.h:2810 [inline]
mlxsw_emad_alloc drivers/net/ethernet/mellanox/mlxsw/core.c:756 [inline]
mlxsw_emad_reg_access drivers/net/ethernet/mellanox/mlxsw/core.c:787 [inline]
mlxsw_core_reg_access_emad+0x1ab/0x1420 drivers/net/ethernet/mellanox/mlxsw/core.c:1817
mlxsw_reg_trans_query+0x39/0x50 drivers/net/ethernet/mellanox/mlxsw/core.c:1831
mlxsw_sp_sb_pm_occ_clear drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c:260 [inline]
mlxsw_sp_sb_occ_max_clear+0xbff/0x10a0 drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c:1365
mlxsw_devlink_sb_occ_max_clear+0x76/0xb0 drivers/net/ethernet/mellanox/mlxsw/core.c:1037
devlink_nl_cmd_sb_occ_max_clear_doit+0x1ec/0x280 net/core/devlink.c:1765
genl_family_rcv_msg_doit net/netlink/genetlink.c:669 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:714 [inline]
genl_rcv_msg+0x617/0x980 net/netlink/genetlink.c:731
netlink_rcv_skb+0x152/0x440 net/netlink/af_netlink.c:2470
genl_rcv+0x24/0x40 net/netlink/genetlink.c:742
netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
netlink_unicast+0x53a/0x750 net/netlink/af_netlink.c:1330
netlink_sendmsg+0x850/0xd90 net/netlink/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg+0x150/0x190 net/socket.c:671
____sys_sendmsg+0x6d8/0x840 net/socket.c:2359
___sys_sendmsg+0xff/0x170 net/socket.c:2413
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2446
do_syscall_64+0x56/0xa0 arch/x86/entry/common.c:384
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Freed by task 73:
save_stack+0x1b/0x40 mm/kasan/common.c:48
set_track mm/kasan/common.c:56 [inline]
kasan_set_free_info mm/kasan/common.c:316 [inline]
__kasan_slab_free+0x12c/0x170 mm/kasan/common.c:455
slab_free_hook mm/slub.c:1474 [inline]
slab_free_freelist_hook mm/slub.c:1507 [inline]
slab_free mm/slub.c:3072 [inline]
kmem_cache_free+0xbe/0x380 mm/slub.c:3088
kfree_skbmem net/core/skbuff.c:622 [inline]
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:616
__kfree_skb net/core/skbuff.c:679 [inline]
consume_skb net/core/skbuff.c:837 [inline]
consume_skb+0xe1/0x370 net/core/skbuff.c:831
mlxsw_emad_trans_finish+0x64/0x1c0 drivers/net/ethernet/mellanox/mlxsw/core.c:592
mlxsw_emad_transmit_retry.isra.0+0x9d/0xc0 drivers/net/ethernet/mellanox/mlxsw/core.c:613
mlxsw_emad_trans_timeout_work+0x43/0x50 drivers/net/ethernet/mellanox/mlxsw/core.c:625
process_one_work+0xa3e/0x17a0 kernel/workqueue.c:2269
worker_thread+0x9e/0x1050 kernel/workqueue.c:2415
kthread+0x355/0x470 kernel/kthread.c:291
ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:293
The buggy address belongs to the object at ffff88804f5703c0
which belongs to the cache skbuff_head_cache of size 224
The buggy address is located 212 bytes inside of
224-byte region [ffff88804f5703c0, ffff88804f5704a0)
The buggy address belongs to the page:
page:ffffea00013d5c00 refcount:1 mapcount:0 mapping:0000000000000000
index:0x0
flags: 0x100000000000200(slab)
raw: 0100000000000200 dead000000000100 dead000000000122 ffff88806c625400
raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88804f570380: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
ffff88804f570400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88804f570480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88804f570500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88804f570580: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
Fixes: caf7297e7ab5f ("mlxsw: core: Introduce support for asynchronous EMAD register access")
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
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Free the devlink instance during the teardown sequence in the non-reload
case to avoid the following memory leak.
unreferenced object 0xffff888232895000 (size 2048):
comm "modprobe", pid 1073, jiffies 4295568857 (age 164.871s)
hex dump (first 32 bytes):
00 01 00 00 00 00 ad de 22 01 00 00 00 00 ad de ........".......
10 50 89 32 82 88 ff ff 10 50 89 32 82 88 ff ff .P.2.....P.2....
backtrace:
[<00000000c704e9a6>] __kmalloc+0x13a/0x2a0
[<00000000ee30129d>] devlink_alloc+0xff/0x760
[<0000000092ab3e5d>] 0xffffffffa042e5b0
[<000000004f3f8a31>] 0xffffffffa042f6ad
[<0000000092800b4b>] 0xffffffffa0491df3
[<00000000c4843903>] local_pci_probe+0xcb/0x170
[<000000006993ded7>] pci_device_probe+0x2c2/0x4e0
[<00000000a8e0de75>] really_probe+0x2c5/0xf90
[<00000000d42ba75d>] driver_probe_device+0x1eb/0x340
[<00000000bcc95e05>] device_driver_attach+0x294/0x300
[<000000000e2bc177>] __driver_attach+0x167/0x2f0
[<000000007d44cd6e>] bus_for_each_dev+0x148/0x1f0
[<000000003cd5a91e>] driver_attach+0x45/0x60
[<000000000041ce51>] bus_add_driver+0x3b8/0x720
[<00000000f5215476>] driver_register+0x230/0x4e0
[<00000000d79356f5>] __pci_register_driver+0x190/0x200
Fixes: a22712a96291 ("mlxsw: core: Fix devlink unregister flow")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reported-by: Vadim Pasternak <vadimp@nvidia.com>
Tested-by: Oleksandr Shamray <oleksandrs@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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