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Variable opc is initialized with a value that is never read, opc
is later re-assigned a newer value, hence the initialization can
be removed.
Cleans up clang warning:
drivers/mmc/host/sh_mmcif.c:919:6: warning: Value stored to 'opc'
during its initialization is never read
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
Final 4.15 drm-misc pull:
Just 3 sun4i patches to fix clock computation/checks.
* tag 'drm-misc-fixes-2018-01-17' of git://anongit.freedesktop.org/drm/drm-misc:
drm/sun4i: hdmi: Add missing rate halving check in sun4i_tmds_determine_rate
drm/sun4i: hdmi: Fix incorrect assignment in sun4i_tmds_determine_rate
drm/sun4i: hdmi: Check for unset best_parent in sun4i_tmds_determine_rate
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git://people.freedesktop.org/~thomash/linux into drm-fixes
Last minute fixes for vmwgfx.
One fix for a drm helper warning introduced in 4.15
One important fix for a longer standing memory corruption issue on older
hardware versions.
* 'vmwgfx-fixes-4.15' of git://people.freedesktop.org/~thomash/linux:
drm/vmwgfx: fix memory corruption with legacy/sou connectors
drm/vmwgfx: Fix a boot time warning
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* acpi-gpio:
gpio: merrifield: Add support of ACPI enabled platforms
ACPI: utils: Introduce acpi_dev_get_first_match_name()
* acpi-button:
ACPI: button: Add a LID switch blacklist and add 1 model to it
ACPI: button: Add a debug message when we're sending a LID event
* acpi-battery:
ACPI / battery: Add quirk for Asus GL502VSK and UX305LA
ACPI: battery: Drop redundant test for failure
* acpi-video:
ACPI / video: Default lcd_only to true on Win8-ready and newer machines
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* acpi-x86:
ACPI / x86: boot: Propagate error code in acpi_gsi_to_irq()
ACPI / x86: boot: Don't setup SCI on HW-reduced platforms
ACPI / x86: boot: Use INVALID_ACPI_IRQ instead of 0 for acpi_sci_override_gsi
ACPI / x86: boot: Get rid of ACPI_INVALID_GSI
ACPI / x86: boot: Swap variables in condition in acpi_register_gsi_ioapic()
* acpi-apei:
ACPI / APEI: remove redundant variables len and node_len
ACPI: APEI: call into AER handling regardless of severity
ACPI: APEI: handle PCIe AER errors in separate function
* acpi-ec:
ACPI: EC: Fix debugfs_create_*() usage
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* acpi-numa:
ACPI / NUMA: ia64: Parse all entries of SRAT memory affinity table
* acpi-sysfs:
ACPI: sysfs: Make ACPI GPE mask kernel parameter cover all GPEs
* acpi-pmic:
ACPI / PMIC: Convert to use builtin_platform_driver() macro
ACPI / PMIC: constify platform_device_id
* acpi-soc:
ACPI / LPSS: Do not instiate platform_dev for devs without MMIO resources
ACPI / LPSS: Add device link for CHT SD card dependency on I2C
* acpi-ged:
ACPI: GED: unregister interrupts during shutdown
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* acpica: (40 commits)
ACPICA: Update version to 20171215
ACPICA: trivial style fix, no functional change
ACPICA: Fix a couple memory leaks during package object resolution
ACPICA: Recognize the Windows 10 version 1607 and 1703 OSI strings
ACPICA: DT compiler: prevent error if optional field at the end of table is not present
ACPICA: Rename a global variable, no functional change
ACPICA: Create and deploy safe version of strncpy
ACPICA: Cleanup the global variables and update comments
ACPICA: Debugger: fix slight indentation issue
ACPICA: Fix a regression in the acpi_evaluate_object_type() interface
ACPICA: Update for a few debug output statements
ACPICA: Debug output, no functional change
ACPICA: Update information in MAINTAINERS
ACPICA: Rename variable to match upstream
ACPICA: Update version to 20171110
ACPICA: ACPI 6.2: Additional PPTT flags
ACPICA: Update linkage for get mutex name interface
ACPICA: Update mutex error messages, no functional change
ACPICA: Debugger: add "background" command for method execution
ACPICA: Small typo fix, no functional change
...
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* pm-opp:
OPP: Introduce "required-opp" property
OPP: Allow OPP table to be used for power-domains
* pm-devfreq:
PM / devfreq: Fix potential NULL pointer dereference in governor_store
PM / devfreq: Propagate error from devfreq_add_device()
* pm-avs:
PM / AVS: rockchip-io: account for const type of of_device_id.data
* pm-tools:
tools/power/x86/intel_pstate_tracer: Free the trace buffer memory
cpupower: Remove FSF address
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* acpi-pm:
platform/x86: surfacepro3: Support for wakeup from suspend-to-idle
ACPI / PM: Use Low Power S0 Idle on more systems
ACPI / PM: Make it possible to ignore the system sleep blacklist
* pm-sleep:
PM / hibernate: Drop unused parameter of enough_swap
block, scsi: Fix race between SPI domain validation and system suspend
PM / sleep: Make lock/unlock_system_sleep() available to kernel modules
PM: hibernate: Do not subtract NR_FILE_MAPPED in minimum_image_size()
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* pm-core: (29 commits)
dmaengine: rcar-dmac: Make DMAC reinit during system resume explicit
PM / runtime: Allow no callbacks in pm_runtime_force_suspend|resume()
PM / runtime: Check ignore_children in pm_runtime_need_not_resume()
PM / runtime: Rework pm_runtime_force_suspend/resume()
PM / wakeup: Print warn if device gets enabled as wakeup source during sleep
PM / core: Propagate wakeup_path status flag in __device_suspend_late()
PM / core: Re-structure code for clearing the direct_complete flag
PM: i2c-designware-platdrv: Optimize power management
PM: i2c-designware-platdrv: Use DPM_FLAG_SMART_PREPARE
PM / mfd: intel-lpss: Use DPM_FLAG_SMART_SUSPEND
PCI / PM: Use SMART_SUSPEND and LEAVE_SUSPENDED flags for PCIe ports
PM / wakeup: Add device_set_wakeup_path() helper to control wakeup path
PM / core: Assign the wakeup_path status flag in __device_prepare()
PM / wakeup: Do not fail dev_pm_attach_wake_irq() unnecessarily
PM / core: Direct DPM_FLAG_LEAVE_SUSPENDED handling
PM / core: Direct DPM_FLAG_SMART_SUSPEND optimization
PM / core: Add helpers for subsystem callback selection
PM / wakeup: Drop redundant check from device_init_wakeup()
PM / wakeup: Drop redundant check from device_set_wakeup_enable()
PM / wakeup: only recommend "call"ing device_init_wakeup() once
...
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* pm-domains:
PM / genpd: Stop/start devices without pm_runtime_force_suspend/resume()
PM / domains: Don't skip driver's ->suspend|resume_noirq() callbacks
PM / Domains: Remove obsolete "samsung,power-domain" check
* pm-kconfig:
bus: simple-pm-bus: convert bool SIMPLE_PM_BUS to tristate
PM: Provide a config snippet for disabling PM
* pm-cpuidle:
cpuidle: Avoid NULL argument in cpuidle_switch_governor()
* powercap:
powercap: intel_rapl: Fix trailing semicolon
powercap: add suspend and resume mechanism for SOC power limit
powercap: Simplify powercap_init()
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* pm-cpufreq: (36 commits)
cpufreq: scpi: remove arm_big_little dependency
drivers: psci: remove cluster terminology and dependency on physical_package_id
cpufreq: powernv: Dont assume distinct pstate values for nominal and pmin
cpufreq: intel_pstate: Add Skylake servers support
cpufreq: intel_pstate: Replace bxt_funcs with core_funcs
cpufreq: imx6q: add 696MHz operating point for i.mx6ul
ARM: dts: imx6ul: add 696MHz operating point
cpufreq: stats: Change return type of cpufreq_stats_update() as void
powernv-cpufreq: Treat pstates as opaque 8-bit values
powernv-cpufreq: Fix pstate_to_idx() to handle non-continguous pstates
powernv-cpufreq: Add helper to extract pstate from PMSR
cpu_cooling: Remove static-power related documentation
cpufreq: imx6q: switch to Use clk_bulk_get() to refine clk operations
PM / OPP: Make local function ti_opp_supply_set_opp() static
PM / OPP: Add ti-opp-supply driver
dt-bindings: opp: Introduce ti-opp-supply bindings
cpufreq: ti-cpufreq: Add support for multiple regulators
cpufreq: ti-cpufreq: Convert to module_platform_driver
cpufreq: Add DVFS support for Armada 37xx
MAINTAINERS: add new entries for Armada 37xx cpufreq driver
...
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* pm-cpufreq-thermal:
cpu_cooling: Remove static-power related documentation
cpu_cooling: Drop static-power related stuff
cpu_cooling: Keep only one of_cpufreq*cooling_register() helper
cpu_cooling: Remove unused cpufreq_power_cooling_register()
cpu_cooling: Make of_cpufreq_power_cooling_register() parse DT
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The trailing semicolon is an empty statement that does no operation.
Removing it since it doesn't do anything.
Signed-off-by: Luis de Bethencourt <luisbg@kernel.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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syzkaller generated a BPF proglet and triggered a warning with
the following:
0: (b7) r0 = 0
1: (d5) if r0 s<= 0x0 goto pc+0
R0=inv0 R1=ctx(id=0,off=0,imm=0) R10=fp0
2: (1f) r0 -= r1
R0=inv0 R1=ctx(id=0,off=0,imm=0) R10=fp0
verifier internal error: known but bad sbounds
What happens is that in the first insn, r0's min/max value
are both 0 due to the immediate assignment, later in the jsle
test the bounds are updated for the min value in the false
path, meaning, they yield smin_val = 1, smax_val = 0, and when
ctx pointer is subtracted from r0, verifier bails out with the
internal error and throwing a WARN since smin_val != smax_val
for the known constant.
For min_val > max_val scenario it means that reg_set_min_max()
and reg_set_min_max_inv() (which both refine existing bounds)
demonstrated that such branch cannot be taken at runtime.
In above scenario for the case where it will be taken, the
existing [0, 0] bounds are kept intact. Meaning, the rejection
is not due to a verifier internal error, and therefore the
WARN() is not necessary either.
We could just reject such cases in adjust_{ptr,scalar}_min_max_vals()
when either known scalars have smin_val != smax_val or
umin_val != umax_val or any scalar reg with bounds
smin_val > smax_val or umin_val > umax_val. However, there
may be a small risk of breakage of buggy programs, so handle
this more gracefully and in adjust_{ptr,scalar}_min_max_vals()
just taint the dst reg as unknown scalar when we see ops with
such kind of src reg.
Reported-by: syzbot+6d362cadd45dc0a12ba4@syzkaller.appspotmail.com
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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The trailing semicolon is an empty statement that does no operation.
Removing it since it doesn't do anything.
Signed-off-by: Luis de Bethencourt <luisbg@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Running the following sequence is currently broken:
# tc qdisc add dev foo clsact
# tc filter replace dev foo ingress prio 1 handle 1 bpf da obj bar.o
# tc filter replace dev foo ingress prio 1 handle 1 bpf da obj bar.o
RTNETLINK answers: Invalid argument
The normal expectation on kernel side is that the second command
succeeds replacing the existing program. However, what happens is
in cls_bpf_change(), we bail out with err in the second run in
cls_bpf_offload(). The EINVAL comes directly in cls_bpf_offload()
when comparing prog vs oldprog's gen_flags. In case of above
replace the new prog's gen_flags are 0, but the old ones are 8,
which means TCA_CLS_FLAGS_NOT_IN_HW is set (e.g. drivers not having
cls_bpf offload).
Fix 102740bd9436 ("cls_bpf: fix offload assumptions after callback
conversion") in the following way: gen_flags from user space passed
down via netlink cannot include status flags like TCA_CLS_FLAGS_IN_HW
or TCA_CLS_FLAGS_NOT_IN_HW as opposed to oldprog that we previously
loaded. Therefore, it doesn't make any sense to include them in the
gen_flags comparison with the new prog before we even attempt to
offload. Thus, lets fix this before 4.15 goes out.
Fixes: 102740bd9436 ("cls_bpf: fix offload assumptions after callback conversion")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1500
In the receive queue for 4096 bytes fragments, the page address
set in the SW data0 field of the descriptor is not the one we got
when doing the reassembly in receive. The page structure was retrieved
from the wrong descriptor into SW data0 which is then causing a
page fault when UDP checksum is accessing data above 1500.
Signed-off-by: Rex Chang <rchang@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The current code copies directly from userspace to ctx->crypto_send, but
doesn't always reinitialize it to 0 on failure. This causes any
subsequent attempt to use this setsockopt to fail because of the
TLS_CRYPTO_INFO_READY check, eventhough crypto_info is not actually
ready.
This should result in a correctly set up socket after the 3rd call, but
currently it does not:
size_t s = sizeof(struct tls12_crypto_info_aes_gcm_128);
struct tls12_crypto_info_aes_gcm_128 crypto_good = {
.info.version = TLS_1_2_VERSION,
.info.cipher_type = TLS_CIPHER_AES_GCM_128,
};
struct tls12_crypto_info_aes_gcm_128 crypto_bad_type = crypto_good;
crypto_bad_type.info.cipher_type = 42;
setsockopt(sock, SOL_TLS, TLS_TX, &crypto_bad_type, s);
setsockopt(sock, SOL_TLS, TLS_TX, &crypto_good, s - 1);
setsockopt(sock, SOL_TLS, TLS_TX, &crypto_good, s);
Fixes: 3c4d7559159b ("tls: kernel TLS support")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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do_tls_setsockopt_tx returns 0 without doing anything when crypto_info
is already set. Silent failure is confusing for users.
Fixes: 3c4d7559159b ("tls: kernel TLS support")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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During setsockopt(SOL_TCP, TLS_TX), if initialization of the software
context fails in tls_set_sw_offload(), we leak sw_ctx. We also don't
reassign ctx->priv_ctx to NULL, so we can't even do another attempt to
set it up on the same socket, as it will fail with -EEXIST.
Fixes: 3c4d7559159b ('tls: kernel TLS support')
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can
Marc Kleine-Budde says:
====================
pull-request: can 2018-01-16
this is a pull reqeust of a single patch for net/master:
This patch by Stephane Grosjean fixes a potential bug in the packet
fragmentation in the peak USB driver.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Some iommu implementations can merge physically and/or virtually
contiguous segments inside sg_map_dma. The NVMe SGL support does not take
this into account and will warn because of falling off a loop. Pass the
number of mapped segments to nvme_pci_setup_sgls so that the SGL setup
can take the number of mapped segments into account.
Reported-by: Fangjian (Turing) <f.fangjian@huawei.com>
Fixes: a7a7cbe3 ("nvme-pci: add SGL support")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@rimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The driver needs to verify there is a payload with a command before
seeing if it should use SGLs to map it.
Fixes: 955b1b5a00ba ("nvme-pci: move use_sgl initialization to nvme_init_iod()")
Reported-by: Paul Menzel <pmenzel+linux-nvme@molgen.mpg.de>
Reviewed-by: Paul Menzel <pmenzel+linux-nvme@molgen.mpg.de>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Calling accept on a TCP socket with a TLS ulp attached results
in two sockets that share the same ulp context.
The ulp context is freed while a socket is destroyed, so
after one of the sockets is released, the second second will
trigger a use after free when it tries to access the ulp context
attached to it.
We restrict the TLS ulp to sockets in ESTABLISHED state
to prevent the scenario above.
Fixes: 3c4d7559159b ("tls: kernel TLS support")
Reported-by: syzbot+904e7cd6c5c741609228@syzkaller.appspotmail.com
Signed-off-by: Ilya Lesokhin <ilyal@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In case of TX timeout, fs_timeout() calls phy_stop(), which
triggers the following BUG_ON() as we are in interrupt.
[92708.199889] kernel BUG at drivers/net/phy/mdio_bus.c:482!
[92708.204985] Oops: Exception in kernel mode, sig: 5 [#1]
[92708.210119] PREEMPT
[92708.212107] CMPC885
[92708.214216] CPU: 0 PID: 3 Comm: ksoftirqd/0 Tainted: G W 4.9.61 #39
[92708.223227] task: c60f0a40 task.stack: c6104000
[92708.227697] NIP: c02a84bc LR: c02a947c CTR: c02a93d8
[92708.232614] REGS: c6105c70 TRAP: 0700 Tainted: G W (4.9.61)
[92708.241193] MSR: 00021032 <ME,IR,DR,RI>[92708.244818] CR: 24000822 XER: 20000000
[92708.248767]
GPR00: c02a947c c6105d20 c60f0a40 c62b4c00 00000005 0000001f c069aad8 0001a688
GPR08: 00000007 00000100 c02a93d8 00000000 000005fc 00000000 c6213240 c06338e4
GPR16: 00000001 c06330d4 c0633094 00000000 c0680000 c6104000 c6104000 00000000
GPR24: 00000200 00000000 ffffffff 00000004 00000078 00009032 00000000 c62b4c00
NIP [c02a84bc] mdiobus_read+0x20/0x74
[92708.281517] LR [c02a947c] kszphy_config_intr+0xa4/0xc4
[92708.286547] Call Trace:
[92708.288980] [c6105d20] [c6104000] 0xc6104000 (unreliable)
[92708.294339] [c6105d40] [c02a947c] kszphy_config_intr+0xa4/0xc4
[92708.300098] [c6105d50] [c02a5330] phy_stop+0x60/0x9c
[92708.305007] [c6105d60] [c02c84d0] fs_timeout+0xdc/0x110
[92708.310197] [c6105d80] [c035cd48] dev_watchdog+0x268/0x2a0
[92708.315593] [c6105db0] [c0060288] call_timer_fn+0x34/0x17c
[92708.321014] [c6105dd0] [c00605f0] run_timer_softirq+0x21c/0x2e4
[92708.326887] [c6105e50] [c001e19c] __do_softirq+0xf4/0x2f4
[92708.332207] [c6105eb0] [c001e3c8] run_ksoftirqd+0x2c/0x40
[92708.337560] [c6105ec0] [c003b420] smpboot_thread_fn+0x1f0/0x258
[92708.343405] [c6105ef0] [c003745c] kthread+0xbc/0xd0
[92708.348217] [c6105f40] [c000c400] ret_from_kernel_thread+0x5c/0x64
[92708.354275] Instruction dump:
[92708.357207] 7c0803a6 bbc10018 38210020 4e800020 7c0802a6 9421ffe0 54290024 bfc10018
[92708.364865] 90010024 7c7f1b78 81290008 552902ee <0f090000> 3bc3002c 7fc3f378 90810008
[92708.372711] ---[ end trace 42b05441616fafd7 ]---
This patch moves fs_timeout() actions into an async worker.
Fixes: commit 48257c4f168e5 ("Add fs_enet ethernet network driver, for several embedded platforms")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
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r8153 on Dell TB15/16 dock corrupts rx packets.
This change is suggested by Realtek. They guess that the XHCI controller
doesn't have enough buffer, and their guesswork is correct, once the RX
aggregation gets disabled, the issue is gone.
ASMedia is currently working on a real sulotion for this issue.
Dell and ODM confirm the bcdDevice and iSerialNumber is unique for TB16.
Note that TB15 has different bcdDevice and iSerialNumber, which are not
unique values. If you still have TB15, please contact Dell to replace it
with TB16.
BugLink: https://bugs.launchpad.net/bugs/1729674
Cc: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Misc fixes:
- A rather involved set of memory hardware encryption fixes to
support the early loading of microcode files via the initrd. These
are larger than what we normally take at such a late -rc stage, but
there are two mitigating factors: 1) much of the changes are
limited to the SME code itself 2) being able to early load
microcode has increased importance in the post-Meltdown/Spectre
era.
- An IRQ vector allocator fix
- An Intel RDT driver use-after-free fix
- An APIC driver bug fix/revert to make certain older systems boot
again
- A pkeys ABI fix
- TSC calibration fixes
- A kdump fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/apic/vector: Fix off by one in error path
x86/intel_rdt/cqm: Prevent use after free
x86/mm: Encrypt the initrd earlier for BSP microcode update
x86/mm: Prepare sme_encrypt_kernel() for PAGE aligned encryption
x86/mm: Centralize PMD flags in sme_encrypt_kernel()
x86/mm: Use a struct to reduce parameters for SME PGD mapping
x86/mm: Clean up register saving in the __enc_copy() assembly code
x86/idt: Mark IDT tables __initconst
Revert "x86/apic: Remove init_bsp_APIC()"
x86/mm/pkeys: Fix fill_sig_info_pkey
x86/tsc: Print tsc_khz, when it differs from cpu_khz
x86/tsc: Fix erroneous TSC rate on Skylake Xeon
x86/tsc: Future-proof native_calibrate_tsc()
kdump: Write the correct address of mem_section into vmcoreinfo
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
"A delayacct statistics correctness fix"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
delayacct: Account blkio completion on the correct task
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 perf fix from Ingo Molnar:
"An Intel RAPL events fix"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/rapl: Fix Haswell and Broadwell server RAPL event
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Ingo Molnar:
"Two futex fixes: a input parameters robustness fix, and futex race
fixes"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
futex: Prevent overflow by strengthen input validation
futex: Avoid violating the 10th rule of futex
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tfile->tun could be detached before we close the tun fd,
via tun_detach_all(), so it should not be used to check for
tfile->tx_array.
As Jason suggested, we probably have to clean it up
unconditionally both in __tun_deatch() and tun_detach_all(),
but this requires to check if it is initialized or not.
Currently skb_array_cleanup() doesn't have such a check,
so I check it in the caller and introduce a helper function,
it is a bit ugly but we can always improve it in net-next.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Fixes: 1576d9860599 ("tun: switch to use skb array for tx")
Cc: Jason Wang <jasowang@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 pti bits and fixes from Thomas Gleixner:
"This last update contains:
- An objtool fix to prevent a segfault with the gold linker by
changing the invocation order. That's not just for gold, it's a
general robustness improvement.
- An improved error message for objtool which spares tearing hairs.
- Make KASAN fail loudly if there is not enough memory instead of
oopsing at some random place later
- RSB fill on context switch to prevent RSB underflow and speculation
through other units.
- Make the retpoline/RSB functionality work reliably for both Intel
and AMD
- Add retpoline to the module version magic so mismatch can be
detected
- A small (non-fix) update for cpufeatures which prevents cpu feature
clashing for the upcoming extra mitigation bits to ease
backporting"
* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
module: Add retpoline tag to VERMAGIC
x86/cpufeature: Move processor tracing out of scattered features
objtool: Improve error message for bad file argument
objtool: Fix seg fault with gold linker
x86/retpoline: Add LFENCE to the retpoline/RSB filling RSB macros
x86/retpoline: Fill RSB on context switch for affected CPUs
x86/kasan: Panic if there is not enough memory to boot
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fix from Thomas Gleixner:
"A one-liner fix which prevents deferrable timers becoming stale when
the system does not switch into NOHZ mode"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
timers: Unconditionally check deferrable base
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As per 90caccdd8cc0 ("bpf: fix bpf_tail_call() x64 JIT"), the index used
for array lookup is defined to be 32-bit wide. Update a misleading
comment that suggests it is 64-bit wide.
Fixes: 39c13c204bb1 ("arm: eBPF JIT compiler")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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When the source and destination register are identical, our JIT does not
generate correct code, which leads to kernel oopses.
Fix this by (a) generating more efficient code, and (b) making use of
the temporary earlier if we will overwrite the address register.
Fixes: 39c13c204bb1 ("arm: eBPF JIT compiler")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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When an eBPF program tail-calls another eBPF program, it enters it after
the prologue to avoid having complex stack manipulations. This can lead
to kernel oopses, and similar.
Resolve this by always using a fixed stack layout, a CPU register frame
pointer, and using this when reloading registers before returning.
Fixes: 39c13c204bb1 ("arm: eBPF JIT compiler")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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The stack layout documentation incorrectly suggests that the BPF JIT
scratch space starts immediately below BPF_FP. This is not correct,
so let's fix the documentation to reflect reality.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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Move the stack documentation towards the top of the file, where it's
relevant for things like the register layout.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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As per 2dede2d8e925 ("ARM EABI: stack pointer must be 64-bit aligned
after a CPU exception") the stack should be aligned to a 64-bit boundary
on EABI systems. Ensure that the eBPF JIT appropraitely aligns the
stack.
Fixes: 39c13c204bb1 ("arm: eBPF JIT compiler")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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When a tail call fails, it is documented that the tail call should
continue execution at the following instruction. An example tail call
sequence is:
12: (85) call bpf_tail_call#12
13: (b7) r0 = 0
14: (95) exit
The ARM assembler for the tail call in this case ends up branching to
instruction 14 instead of instruction 13, resulting in the BPF filter
returning a non-zero value:
178: ldr r8, [sp, #588] ; insn 12
17c: ldr r6, [r8, r6]
180: ldr r8, [sp, #580]
184: cmp r8, r6
188: bcs 0x1e8
18c: ldr r6, [sp, #524]
190: ldr r7, [sp, #528]
194: cmp r7, #0
198: cmpeq r6, #32
19c: bhi 0x1e8
1a0: adds r6, r6, #1
1a4: adc r7, r7, #0
1a8: str r6, [sp, #524]
1ac: str r7, [sp, #528]
1b0: mov r6, #104
1b4: ldr r8, [sp, #588]
1b8: add r6, r8, r6
1bc: ldr r8, [sp, #580]
1c0: lsl r7, r8, #2
1c4: ldr r6, [r6, r7]
1c8: cmp r6, #0
1cc: beq 0x1e8
1d0: mov r8, #32
1d4: ldr r6, [r6, r8]
1d8: add r6, r6, #44
1dc: bx r6
1e0: mov r0, #0 ; insn 13
1e4: mov r1, #0
1e8: add sp, sp, #596 ; insn 14
1ec: pop {r4, r5, r6, r7, r8, sl, pc}
For other sequences, the tail call could end up branching midway through
the following BPF instructions, or maybe off the end of the function,
leading to unknown behaviours.
Fixes: 39c13c204bb1 ("arm: eBPF JIT compiler")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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Avoid the 'bx' instruction on CPUs that have no support for Thumb and
thus do not implement this instruction by moving the generation of this
opcode to a separate function that selects between:
bx reg
and
mov pc, reg
according to the capabilities of the CPU.
Fixes: 39c13c204bb1 ("arm: eBPF JIT compiler")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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It looks like in all cases 'struct vmw_connector_state' is used. But
only in stdu connectors, was atomic_{duplicate,destroy}_state() properly
subclassed. Leading to writes beyond the end of the allocated connector
state block and all sorts of fun memory corruption related crashes.
Fixes: d7721ca71126 "drm/vmwgfx: Connector atomic state"
Cc: <stable@vger.kernel.org>
Signed-off-by: Rob Clark <rclark@redhat.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
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On a I2C_SMBUS_I2C_BLOCK_DATA read request, if data->block[0] is
greater than I2C_SMBUS_BLOCK_MAX + 1, the underlying I2C driver writes
data out of the msgbuf1 array boundary.
It is possible from a user application to run into that issue by
calling the I2C_SMBUS ioctl with data.block[0] greater than
I2C_SMBUS_BLOCK_MAX + 1.
This patch makes the code compliant with
Documentation/i2c/dev-interface by raising an error when the requested
size is larger than 32 bytes.
Call Trace:
[<ffffffff8139f695>] dump_stack+0x67/0x92
[<ffffffff811802a4>] panic+0xc5/0x1eb
[<ffffffff810ecb5f>] ? vprintk_default+0x1f/0x30
[<ffffffff817456d3>] ? i2cdev_ioctl_smbus+0x303/0x320
[<ffffffff8109a68b>] __stack_chk_fail+0x1b/0x20
[<ffffffff817456d3>] i2cdev_ioctl_smbus+0x303/0x320
[<ffffffff81745aed>] i2cdev_ioctl+0x4d/0x1e0
[<ffffffff811f761a>] do_vfs_ioctl+0x2ba/0x490
[<ffffffff81336e43>] ? security_file_ioctl+0x43/0x60
[<ffffffff811f7869>] SyS_ioctl+0x79/0x90
[<ffffffff81a22e97>] entry_SYSCALL_64_fastpath+0x12/0x6a
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
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Reference count of device node was increased in of_i2c_register_device,
but without decreasing it in i2c_unregister_device. Then the added
device node will never be released. Fix this by adding the of_node_put.
Signed-off-by: Lixin Wang <alan.1.wang@nokia-sbell.com>
Tested-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
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Fix to return error code -ENOMEM from the mempool_create_kmalloc_pool()
error handling case instead of 0, as done elsewhere in this function.
Fixes: ef43aa38063a6 ("dm crypt: add cryptographic data integrity protection (authenticated encryption)")
Cc: stable@vger.kernel.org # 4.12+
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Loading key via kernel keyring service erases the internal
key copy immediately after we pass it in crypto layer. This is
wrong because IV is initialized later and we use wrong key
for the initialization (instead of real key there's just zeroed
block).
The bug may cause data corruption if key is loaded via kernel keyring
service first and later same crypt device is reactivated using exactly
same key in hexbyte representation, or vice versa. The bug (and fix)
affects only ciphers using following IVs: essiv, lmk and tcw.
Fixes: c538f6ec9f56 ("dm crypt: add ability to use keys from the kernel key retention service")
Cc: stable@vger.kernel.org # 4.10+
Signed-off-by: Ondrej Kozina <okozina@redhat.com>
Reviewed-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Some asynchronous cipher implementations may use DMA. The stack may
be mapped in the vmalloc area that doesn't support DMA. Therefore,
the cipher request and initialization vector shouldn't be on the
stack.
Fix this by allocating the request and iv with kmalloc.
Cc: stable@vger.kernel.org # v4.12+
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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If dm-crypt uses authenticated mode with separate MAC, there are two
concatenated part of the key structure - key(s) for encryption and
authentication key.
Add a missing check for authenticated key length. If this key length is
smaller than actually provided key, dm-crypt now properly fails instead
of crashing.
Fixes: ef43aa3806 ("dm crypt: add cryptographic data integrity protection (authenticated encryption)")
Cc: stable@vger.kernel.org # 4.12+
Reported-by: Salah Coronya <salahx@yahoo.com>
Signed-off-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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When inserting a new key/value pair into a btree we walk down the spine of
btree nodes performing the following 2 operations:
i) space for a new entry
ii) adjusting the first key entry if the new key is lower than any in the node.
If the _root_ node is full, the function btree_split_beneath() allocates 2 new
nodes, and redistibutes the root nodes entries between them. The root node is
left with 2 entries corresponding to the 2 new nodes.
btree_split_beneath() then adjusts the spine to point to one of the two new
children. This means the first key is never adjusted if the new key was lower,
ie. operation (ii) gets missed out. This can result in the new key being
'lost' for a period; until another low valued key is inserted that will uncover
it.
This is a serious bug, and quite hard to make trigger in normal use. A
reproducing test case ("thin create devices-in-reverse-order") is
available as part of the thin-provision-tools project:
https://github.com/jthornber/thin-provisioning-tools/blob/master/functional-tests/device-mapper/dm-tests.scm#L593
Fix the issue by changing btree_split_beneath() so it no longer adjusts
the spine. Instead it unlocks both the new nodes, and lets the main
loop in btree_insert_raw() relock the appropriate one and make any
neccessary adjustments.
Cc: stable@vger.kernel.org
Reported-by: Monty Pavel <monty_pavel@sina.com>
Signed-off-by: Joe Thornber <thornber@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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