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Before entering the guest, we check whether our VMID is still
part of the current generation. In order to avoid taking a lock,
we start with checking that the generation is still current, and
only if not current do we take the lock, recheck, and update the
generation and VMID.
This leaves open a small race: A vcpu can bump up the global
generation number as well as the VM's, but has not updated
the VMID itself yet.
At that point another vcpu from the same VM comes in, checks
the generation (and finds it not needing anything), and jumps
into the guest. At this point, we end-up with two vcpus belonging
to the same VM running with two different VMIDs. Eventually, the
VMID used by the second vcpu will get reassigned, and things will
really go wrong...
A simple solution would be to drop this initial check, and always take
the lock. This is likely to cause performance issues. A middle ground
is to convert the spinlock to a rwlock, and only take the read lock
on the fast path. If the check fails at that point, drop it and
acquire the write lock, rechecking the condition.
This ensures that the above scenario doesn't occur.
Cc: stable@vger.kernel.org
Reported-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Shannon Zhao <zhaoshenglong@huawei.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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It may be useful to compile host programs with different flags (e.g.
hardening). Ensure that objtool picks up the appropriate flags.
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kbuild@vger.kernel.org
Link: http://lkml.kernel.org/r/05a360681176f1423cb2fde8faae3a0a0261afc5.1523560825.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Now exynos_drm_fb is just an empty wrapper around drm_framebuffer, we
can drop it.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
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This can be calculated from the GEM BO DMA address as well as the offset
stored in the base framebuffer.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
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Since drm_framebuffer can now store GEM objects directly, place them
there rather than in our own subclass. As this makes the framebuffer
create_handle and destroy functions the same as the GEM framebuffer
helper, we can reuse those.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
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This warning message is not very helpful, as the return value should
already show information about the error. Also, this message will
spam dmesg if the user space does testing in a loop, like:
for x in {0..5}
do
echo p:xx xx+$x >> /sys/kernel/debug/tracing/kprobe_events
done
Reported-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Song Liu <songliubraving@fb.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel-team@fb.com
Link: http://lkml.kernel.org/r/20180413185513.3626052-1-songliubraving@fb.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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rq->gstate and rq->aborted_gstate both are zero before rqs are
allocated. If we have a small timeout, when the timer fires,
there could be rqs that are never allocated, and also there could
be rq that has been allocated but not initialized and started. At
the moment, the rq->gstate and rq->aborted_gstate both are 0, thus
the blk_mq_terminate_expired will identify the rq is timed out and
invoke .timeout early.
For scsi, this will cause scsi_times_out to be invoked before the
scsi_cmnd is not initialized, scsi_cmnd->device is still NULL at
the moment, then we will get crash.
Cc: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Martin Steigerwald <Martin@Lichtvoll.de>
Cc: stable@vger.kernel.org
Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The driver supports internal and external FDD units so the floppy_open
function must not hard-code the drive location.
Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: stable@vger.kernel.org # v4.14+
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Reading to the end of a 720K disk results in an IO error instead of EOF
because the block layer thinks the disk has 2880 sectors. (Partly this
is a result of inverted logic of the ONEMEG_MEDIA bit that's now fixed.)
Initialize the density and head count in swim_add_floppy() to agree
with the device size passed to set_capacity() during drive probe.
Call set_capacity() again upon device open, after refreshing the density
and head count values.
Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: stable@vger.kernel.org # v4.14+
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The SWIM chip is compatible with GCR-mode Sony 400K/800K drives but
this driver only supports MFM mode. Therefore only Sony FDHD drives
are supported. Skip incompatible drives.
Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: stable@vger.kernel.org # v4.14+
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The Sony drive status bits use active-low logic. The swim_readbit()
function converts that to 'C' logic for readability. Hence, the
sense of the names of the status bit macros should not be inverted.
Mostly they are correct. However, the TWOMEG_DRIVE, MFM_MODE and
TWOMEG_MEDIA macros have inverted sense (like MkLinux). Fix this
inconsistency and make the following patches less confusing.
The same problem affects swim3.c so fix that too.
No functional change.
The FDHD drive status bits are documented in sonydriv.cpp from MAME
and in swimiii.h from MkLinux.
Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Jens Axboe <axboe@kernel.dk>
Cc: stable@vger.kernel.org # v4.14+
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The 'eject' shell command may send various different ioctl commands.
This leads to error messages on the console even though the FDEJECT
ioctl succeeds.
~# eject floppy
SWIM floppy_ioctl: unknown cmd 21257
SWIM floppy_ioctl: unknown cmd 1
Don't log an error message for an invalid ioctl, just do as the
swim3 driver does and return -ENOTTY.
Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: stable@vger.kernel.org # v4.14+
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: stable@vger.kernel.org # v4.14+
Fixes: 103db8b2dfa5 ("[PATCH] swim: stop sharing request queue across multiple gendisks")
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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In the floppy_find() function in swim.c is a call to
get_disk(swd->unit[drive].disk). The actual parameter to this call
can be a NULL pointer when drive == swd->floppy_count. This causes
an oops in get_disk().
Data read fault at 0x00000198 in Super Data (pc=0x1be5b6)
BAD KERNEL BUSERR
Oops: 00000000
Modules linked in: swim_mod ipv6 mac8390
PC: [<001be5b6>] get_disk+0xc/0x76
SR: 2004 SP: 9a078bc1 a2: 0213ed90
d0: 00000000 d1: 00000000 d2: 00000000 d3: 000000ff
d4: 00000002 d5: 02983590 a0: 02332e00 a1: 022dfd64
Process dd (pid: 285, task=020ab25b)
Frame format=B ssw=074d isc=4a88 isb=6732 daddr=00000198 dobuf=00000000
baddr=001be5bc dibuf=bfffffff ver=f
Stack from 022dfca4:
00000000 0203fc00 0213ed90 022dfcc0 02982936 00000000 00200000 022dfd08
0020f85a 00200000 022dfd64 02332e00 004040fc 00000014 001be77e 022dfd64
00334e4a 001be3f8 0800001d 022dfd64 01c04b60 01c04b70 022aba80 029828f8
02332e00 022dfd2c 001be7ac 0203fc00 00200000 022dfd64 02103a00 01c04b60
01c04b60 0200e400 022dfd68 000e191a 00200000 022dfd64 02103a00 0800001d
00000000 00000003 000b89de 00500000 02103a00 01c04b60 02103a08 01c04c2e
Call Trace: [<02982936>] floppy_find+0x3e/0x4a [swim_mod]
[<00200000>] uart_remove_one_port+0x1a2/0x260
[<0020f85a>] kobj_lookup+0xde/0x132
[<00200000>] uart_remove_one_port+0x1a2/0x260
[<001be77e>] get_gendisk+0x0/0x130
[<00334e4a>] mutex_lock+0x0/0x2e
[<001be3f8>] disk_block_events+0x0/0x6c
[<029828f8>] floppy_find+0x0/0x4a [swim_mod]
[<001be7ac>] get_gendisk+0x2e/0x130
[<00200000>] uart_remove_one_port+0x1a2/0x260
[<000e191a>] __blkdev_get+0x32/0x45a
[<00200000>] uart_remove_one_port+0x1a2/0x260
[<000b89de>] complete_walk+0x0/0x8a
[<000e1e22>] blkdev_get+0xe0/0x29a
[<000e1fdc>] blkdev_open+0x0/0xb0
[<000b89de>] complete_walk+0x0/0x8a
[<000e1fdc>] blkdev_open+0x0/0xb0
[<000e01cc>] bd_acquire+0x74/0x8a
[<000e205c>] blkdev_open+0x80/0xb0
[<000e1fdc>] blkdev_open+0x0/0xb0
[<000abf24>] do_dentry_open+0x1a4/0x322
[<00020000>] __do_proc_douintvec+0x22/0x27e
[<000b89de>] complete_walk+0x0/0x8a
[<000baa62>] link_path_walk+0x0/0x48e
[<000ba3f8>] inode_permission+0x20/0x54
[<000ac0e4>] vfs_open+0x42/0x78
[<000bc372>] path_openat+0x2b2/0xeaa
[<000bc0c0>] path_openat+0x0/0xeaa
[<0004463e>] __irq_wake_thread+0x0/0x4e
[<0003a45a>] task_tick_fair+0x18/0xc8
[<000bd00a>] do_filp_open+0xa0/0xea
[<000abae0>] do_sys_open+0x11a/0x1ee
[<00020000>] __do_proc_douintvec+0x22/0x27e
[<000abbf4>] SyS_open+0x1e/0x22
[<00020000>] __do_proc_douintvec+0x22/0x27e
[<00002b40>] syscall+0x8/0xc
[<00020000>] __do_proc_douintvec+0x22/0x27e
[<0000c00b>] dyadic+0x1/0x28
Code: 4e5e 4e75 4e56 fffc 2f0b 2f02 266e 0008 <206b> 0198 4a88 6732 2428 002c 661e 486b 0058 4eb9 0032 0b96 588f 4a88 672c 2008
Disabling lock debugging due to kernel taint
Fix the array index bounds check to avoid this.
Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: stable@vger.kernel.org # v4.14+
Fixes: 8852ecd97488 ("[PATCH] m68k: mac - Add SWIM floppy support")
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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For reasons I don't understand, calling ioremap() then iounmap() on
the SWIM MMIO region causes a hang on 68030 (but not on 68040).
~# modprobe swim_mod
SWIM floppy driver Version 0.2 (2008-10-30)
SWIM device not found !
watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [modprobe:285]
Modules linked in: swim_mod(+)
Format 00 Vector: 0064 PC: 000075aa Status: 2000 Not tainted
ORIG_D0: ffffffff D0: d00c0000 A2: 007c2370 A1: 003f810c
A0: 00040000 D5: d0096800 D4: d0097e00
D3: 00000001 D2: 00000003 D1: 00000000
Non-Maskable Interrupt
Modules linked in: swim_mod(+)
PC: [<000075ba>] __iounmap+0x24/0x10e
SR: 2000 SP: 007abc48 a2: 007c2370
d0: d00c0000 d1: 000001a0 d2: 00000019 d3: 00000001
d4: d0097e00 d5: d0096800 a0: 00040000 a1: 003f810c
Process modprobe (pid: 285, task=007c2370)
Frame format=0
Stack from 007abc7c:
ffffffed 00000000 006a4060 004712e0 007abca0 000076ea d0080000 00080000
010bb4b8 007abcd8 010ba542 d0096000 00000000 00000000 00000001 010bb59c
00000000 007abf30 010bb4b8 0047760a 0047763c 00477612 00616540 007abcec
0020a91a 00477600 0047760a 010bb4cc 007abd18 002092f2 0047760a 00333b06
007abd5c 00000000 0047760a 010bb4cc 00404f90 004776b8 00000001 007abd38
00209446 010bb4cc 0047760a 010bb4cc 0020938e 0031f8be 00616540 007abd64
Call Trace: [<000076ea>] iounmap+0x46/0x5a
[<00080000>] shrink_page_list+0x7f6/0xe06
[<010ba542>] swim_probe+0xe4/0x496 [swim_mod]
[<0020a91a>] platform_drv_probe+0x20/0x5e
[<002092f2>] driver_probe_device+0x21c/0x2b8
[<00333b06>] mutex_lock+0x0/0x2e
[<00209446>] __driver_attach+0xb8/0xce
[<0020938e>] __driver_attach+0x0/0xce
[<0031f8be>] klist_next+0x0/0xa0
[<00207562>] bus_for_each_dev+0x74/0xba
[<000344c0>] blocking_notifier_call_chain+0x0/0x20
[<00333b06>] mutex_lock+0x0/0x2e
[<00208e44>] driver_attach+0x1a/0x1e
[<0020938e>] __driver_attach+0x0/0xce
[<00207e26>] bus_add_driver+0x188/0x234
[<000344c0>] blocking_notifier_call_chain+0x0/0x20
[<00209894>] driver_register+0x58/0x104
[<000344c0>] blocking_notifier_call_chain+0x0/0x20
[<010bd000>] swim_init+0x0/0x2c [swim_mod]
[<0020a7be>] __platform_driver_register+0x38/0x3c
[<010bd028>] swim_init+0x28/0x2c [swim_mod]
[<000020dc>] do_one_initcall+0x38/0x196
[<000344c0>] blocking_notifier_call_chain+0x0/0x20
[<003331cc>] mutex_unlock+0x0/0x3e
[<00333b06>] mutex_lock+0x0/0x2e
[<003331cc>] mutex_unlock+0x0/0x3e
[<00333b06>] mutex_lock+0x0/0x2e
[<003331cc>] mutex_unlock+0x0/0x3e
[<00333b06>] mutex_lock+0x0/0x2e
[<003331cc>] mutex_unlock+0x0/0x3e
[<00333b06>] mutex_lock+0x0/0x2e
[<00075008>] __free_pages+0x0/0x38
[<000045c0>] mangle_kernel_stack+0x30/0xda
[<000344c0>] blocking_notifier_call_chain+0x0/0x20
[<003331cc>] mutex_unlock+0x0/0x3e
[<00333b06>] mutex_lock+0x0/0x2e
[<0005ced4>] do_init_module+0x42/0x266
[<010bd000>] swim_init+0x0/0x2c [swim_mod]
[<000344c0>] blocking_notifier_call_chain+0x0/0x20
[<0005eda0>] load_module+0x1a30/0x1e70
[<0000465d>] mangle_kernel_stack+0xcd/0xda
[<00331c64>] __generic_copy_from_user+0x0/0x46
[<0033256e>] _cond_resched+0x0/0x32
[<00331b9c>] memset+0x0/0x98
[<0033256e>] _cond_resched+0x0/0x32
[<0005f25c>] SyS_init_module+0x7c/0x112
[<00002000>] _start+0x0/0x8
[<00002000>] _start+0x0/0x8
[<00331c82>] __generic_copy_from_user+0x1e/0x46
[<0005f2b2>] SyS_init_module+0xd2/0x112
[<0000465d>] mangle_kernel_stack+0xcd/0xda
[<00002b40>] syscall+0x8/0xc
[<0000465d>] mangle_kernel_stack+0xcd/0xda
[<0008c00c>] pcpu_balance_workfn+0xb2/0x40e
Code: 2200 7419 e4a9 e589 2841 d9fc 0000 1000 <2414> 7203 c282 7602 b681 6600 0096 0242 fe00 0482 0000 0000 e9c0 11c3 ed89 2642
There's no need to call ioremap() for the SWIM address range, as it lies
within the usual IO device region at 0x5000 0000, which has already been
mapped by head.S.
Remove the redundant ioremap() and iounmap() calls to fix the hang.
Cc: Laurent Vivier <lvivier@redhat.com>
Cc: stable@vger.kernel.org # v4.14+
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Make lib/textsearch.c usable as kernel-doc.
Add textsearch() function family to kernel-api documentation.
Fix kernel-doc warnings in <linux/textsearch.h>:
../include/linux/textsearch.h:65: warning: Incorrect use of kernel-doc format:
* get_next_block - fetch next block of data
../include/linux/textsearch.h:82: warning: Incorrect use of kernel-doc format:
* finish - finalize/clean a series of get_next_block() calls
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If CONFIG_RASPBERRYPI_FIRMWARE=n:
drivers/gpio/gpio-raspberrypi-exp.c: In function ‘rpi_exp_gpio_get_polarity’:
drivers/gpio/gpio-raspberrypi-exp.c:71: warning: ‘get.polarity’ is used uninitialized in this function
drivers/gpio/gpio-raspberrypi-exp.c: In function ‘rpi_exp_gpio_get_direction’:
drivers/gpio/gpio-raspberrypi-exp.c:150: warning: ‘get.direction’ is used uninitialized in this function
The dummy firmware interface functions return 0, which means success,
causing subsequent code to make use of the never initialized output
parameter.
Fix this by making the dummy functions return an error code (-ENOSYS)
instead.
Note that this assumes the firmware always fills in the requested data
in the CONFIG_RASPBERRYPI_FIRMWARE=y case.
Fixes: d45f1a563b92dac7 ("staging: vc04_services: fix up rpi firmware functions")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
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Commit a09cd356586d ("ARM: bcm2835: add rpi power domain driver")
attempted to annotate the structure rpi_power_domain_packet with
__packed but introduced a typo and made it named __packet instead. Just
drop the annotation since the structure is naturally aligned already.
Fixes: a09cd356586d ("ARM: bcm2835: add rpi power domain driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
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Eric Dumazet says:
====================
tipc: Better check user provided attributes
syzbot reported a crash in __tipc_nl_net_set()
While fixing it, I also had to fix an old bug involving TIPC_NLA_NET_ADDR
====================
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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syzbot reported a crash in __tipc_nl_net_set() caused by NULL dereference.
We need to check that both TIPC_NLA_NET_NODEID and TIPC_NLA_NET_NODEID_W1
are present.
We also need to make sure userland provided u64 attributes.
Fixes: d50ccc2d3909 ("tipc: add 128-bit node identifier")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jon Maloy <jon.maloy@ericsson.com>
Cc: Ying Xue <ying.xue@windriver.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Before syzbot/KMSAN bites, add the missing policy for TIPC_NLA_NET_ADDR
Fixes: 27c21416727a ("tipc: add net set to new netlink api")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jon Maloy <jon.maloy@ericsson.com>
Cc: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc build fix from Helge Deller:
"Fix build error because of missing binfmt_elf32.o file which is still
mentioned in the Makefile"
* 'parisc-4.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Fix missing binfmt_elf32.o build error
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The MIPS kernel memset / bzero implementation includes a small_memset
branch which is used when the region to be set is smaller than a long (4
bytes on 32bit, 8 bytes on 64bit). The current small_memset
implementation uses a simple store byte loop to write the destination.
There are 2 issues with this implementation:
1. When EVA mode is active, user and kernel address spaces may overlap.
Currently the use of the sb instruction means kernel mode addressing is
always used and an intended write to userspace may actually overwrite
some critical kernel data.
2. If the write triggers a page fault, for example by calling
__clear_user(NULL, 2), instead of gracefully handling the fault, an OOPS
is triggered.
Fix these issues by replacing the sb instruction with the EX() macro,
which will emit EVA compatible instuctions as required. Additionally
implement a fault fixup for small_memset which sets a2 to the number of
bytes that could not be cleared (as defined by __clear_user).
Reported-by: Chuanhua Lei <chuanhua.lei@intel.com>
Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/18975/
Signed-off-by: James Hogan <jhogan@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull missed timer updates from Thomas Gleixner:
"This is a branch which got forgotten during the merge window, but it
contains only fixes and hardware enablement. No fundamental changes.
- Various fixes for the imx-tpm clocksource driver
- A new timer driver for the NCPM7xx SoC family"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clocksource/drivers/imx-tpm: Add different counter width support
clocksource/drivers/imx-tpm: Correct some registers operation flow
clocksource/drivers/imx-tpm: Fix typo of clock name
dt-bindings: timer: tpm: fix typo of clock name
clocksource/drivers/npcm: Add NPCM7xx timer driver
dt-binding: timer: document NPCM7xx timer DT bindings
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Both ecryptfs_filldir() and ecryptfs_readlink_lower() use
ecryptfs_decode_and_decrypt_filename() to translate lower filenames to
upper filenames. The function correctly passes up lower filenames,
unchanged, when filename encryption isn't in use. However, it was also
passing up lower filenames when the filename wasn't encrypted or
when decryption failed. Since 88ae4ab9802e, eCryptfs refuses to lookup
lower plaintext names when filename encryption is enabled so this
resulted in a situation where userspace would see lower plaintext
filenames in calls to getdents(2) but then not be able to lookup those
filenames.
An example of this can be seen when enabling filename encryption on an
eCryptfs mount at the root directory of an Ext4 filesystem:
$ ls -1i /lower
12 ECRYPTFS_FNEK_ENCRYPTED.FWYZD8TcW.5FV-TKTEYOHsheiHX9a-w.NURCCYIMjI8pn5BDB9-h3fXwrE--
11 lost+found
$ ls -1i /upper
ls: cannot access '/upper/lost+found': No such file or directory
? lost+found
12 test
With this change, the lower lost+found dentry is ignored:
$ ls -1i /lower
12 ECRYPTFS_FNEK_ENCRYPTED.FWYZD8TcW.5FV-TKTEYOHsheiHX9a-w.NURCCYIMjI8pn5BDB9-h3fXwrE--
11 lost+found
$ ls -1i /upper
12 test
Additionally, some potentially noisy error/info messages in the related
code paths are turned into debug messages so that the logs can't be
easily filled.
Fixes: 88ae4ab9802e ("ecryptfs_lookup(): try either only encrypted or plaintext name")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
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Pull kvm fixes from Paolo Bonzini:
"Bug fixes, plus a new test case and the associated infrastructure for
writing nested virtualization tests"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
kvm: selftests: add vmx_tsc_adjust_test
kvm: x86: move MSR_IA32_TSC handling to x86.c
X86/KVM: Properly update 'tsc_offset' to represent the running guest
kvm: selftests: add -std=gnu99 cflags
x86: Add check for APIC access address for vmentry of L2 guests
KVM: X86: fix incorrect reference of trace_kvm_pi_irte_update
X86/KVM: Do not allow DISABLE_EXITS_MWAIT when LAPIC ARAT is not available
kvm: selftests: fix spelling mistake: "divisable" and "divisible"
X86/VMX: Disable VMX preemption timer if MWAIT is not intercepted
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The |= operator will let us end up with an invalid PTE. Use
the correct &= instead.
[ The bug was also independently reported by Shuah Khan ]
Fixes: fb43d6cb91ef ('x86/mm: Do not auto-massage page protections')
Acked-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fixes the following sparse warning:
sound/soc/amd/acp-da7219-max98357a.c:46:12: warning:
symbol 'da7219_dai_clk' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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The size of these modules is 0x2000, not 0x3000. The extra 0x1000
after 0x2000 is for the interconnect target agent which is a separate
device.
Fixes: 7415b0b4c645 ("ARM: dts: omap4: add minimal l4 bus layout with
control module support")
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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It would allocate memory in this function when the cork->opt is NULL. But
the memory isn't freed if failed in the latter rt check, and return error
directly. It causes the memleak if its caller is ip_make_skb which also
doesn't free the cork->opt when meet a error.
Now move the rt check ahead to avoid the memleak.
Signed-off-by: Gao Feng <gfree.wind@vip.163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The patch adds the missing register in the readable table.
Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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In both HDMI and DP, device count is represented by 6:0 bits of a
register(BInfo/Bstatus)
So macro for bitmasking the device_count is fixed(0x3F->0x7F).
v3:
Retained the Rb-ed.
v4:
%s/drm\/i915/drm [rodrigo]
v5:
Added "Fixes:" and HDCP keyword in subject [Rodrigo, Sean Paul]
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Fixes: 495eb7f877ab drm: Add some HDCP related #defines
cc: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1522929802-22850-1-git-send-email-ramalingam.c@intel.com
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The test checks the behavior of setting MSR_IA32_TSC in a nested guest,
and the TSC_OFFSET VMCS field in general. It also introduces the testing
infrastructure for Intel nested virtualization.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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This is not specific to Intel/AMD anymore. The TSC offset is available
in vcpu->arch.tsc_offset.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Update 'tsc_offset' on vmentry/vmexit of L2 guests to ensure that it always
captures the TSC_OFFSET of the running guest whether it is the L1 or L2
guest.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Jim Mattson <jmattson@google.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: KarimAllah Ahmed <karahmed@amazon.de>
[AMD changes, fix update_ia32_tsc_adjust_msr. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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set->name must be free'd here in case ops->init fails.
Fixes: 387454901bd6 ("netfilter: nf_tables: Allow set names of up to 255 chars")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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rules in nftables a free'd using kfree, but protected by rcu, i.e. we
must wait for a grace period to elapse.
Normal removal patch does this, but nf_tables_newrule() doesn't obey
this rule during error handling.
It calls nft_trans_rule_add() *after* linking rule, and, if that
fails to allocate memory, it unlinks the rule and then kfree() it --
this is unsafe.
Switch order -- first add rule to transaction list, THEN link it
to public list.
Note: nft_trans_rule_add() uses GFP_KERNEL; it will not fail so this
is not a problem in practice (spotted only during code review).
Fixes: 0628b123c96d12 ("netfilter: nfnetlink: add batch support and use it from nf_tables")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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We get a new link error with CONFIG_NFT_REJECT_INET=y and CONFIG_NF_REJECT_IPV6=m
after larger parts of the nftables modules are linked together:
net/netfilter/nft_reject_inet.o: In function `nft_reject_inet_eval':
nft_reject_inet.c:(.text+0x17c): undefined reference to `nf_send_unreach6'
nft_reject_inet.c:(.text+0x190): undefined reference to `nf_send_reset6'
The problem is that with NF_TABLES_INET set, we implicitly try to use
the ipv6 version as well for NFT_REJECT, but when CONFIG_IPV6 is set to
a loadable module, it's impossible to reach that.
The best workaround I found is to express the above as a Kconfig
dependency, forcing NFT_REJECT itself to be 'm' in that particular
configuration.
Fixes: 02c7b25e5f54 ("netfilter: nf_tables: build-in filter chain type")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The following memory leak is false postive:
unreferenced object 0xffff8f37f156fb38 (size 128):
comm "softirq", pid 0, jiffies 4294899665 (age 11.292s)
hex dump (first 32 bytes):
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
00 00 00 00 30 00 20 00 48 6b 6b 6b 6b 6b 6b 6b ....0. .Hkkkkkkk
backtrace:
[<000000004fda266a>] __kmalloc_track_caller+0x10d/0x141
[<000000007b0a7e3c>] __krealloc+0x45/0x62
[<00000000d08e0bfb>] nf_ct_ext_add+0xdc/0x133
[<0000000099b47fd8>] init_conntrack+0x1b1/0x392
[<0000000086dc36ec>] nf_conntrack_in+0x1ee/0x34b
[<00000000940592de>] nf_hook_slow+0x36/0x95
[<00000000d1bd4da7>] nf_hook.constprop.43+0x1c3/0x1dd
[<00000000c3673266>] __ip_local_out+0xae/0xb4
[<000000003e4192a6>] ip_local_out+0x17/0x33
[<00000000b64356de>] igmp_ifc_timer_expire+0x23e/0x26f
[<000000006a8f3032>] call_timer_fn+0x14c/0x2a5
[<00000000650c1725>] __run_timers.part.34+0x150/0x182
[<0000000090e6946e>] run_timer_softirq+0x2a/0x4c
[<000000004d1e7293>] __do_softirq+0x1d1/0x3c2
[<000000004643557d>] irq_exit+0x53/0xa2
[<0000000029ddee8f>] smp_apic_timer_interrupt+0x22a/0x235
because __krealloc() is not supposed to release the old
memory and it is released later via kfree_rcu(). Since this is
the only external user of __krealloc(), just mark it as not leak
here.
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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In order to remove the race caught by syzbot [1], we need
to lock the socket before using po->tp_version as this could
change under us otherwise.
This means lock_sock() and release_sock() must be done by
packet_set_ring() callers.
[1] :
BUG: KMSAN: uninit-value in packet_set_ring+0x1254/0x3870 net/packet/af_packet.c:4249
CPU: 0 PID: 20195 Comm: syzkaller707632 Not tainted 4.16.0+ #83
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x185/0x1d0 lib/dump_stack.c:53
kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
__msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676
packet_set_ring+0x1254/0x3870 net/packet/af_packet.c:4249
packet_setsockopt+0x12c6/0x5a90 net/packet/af_packet.c:3662
SYSC_setsockopt+0x4b8/0x570 net/socket.c:1849
SyS_setsockopt+0x76/0xa0 net/socket.c:1828
do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x449099
RSP: 002b:00007f42b5307ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 000000000070003c RCX: 0000000000449099
RDX: 0000000000000005 RSI: 0000000000000107 RDI: 0000000000000003
RBP: 0000000000700038 R08: 000000000000001c R09: 0000000000000000
R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000080eecf R14: 00007f42b53089c0 R15: 0000000000000001
Local variable description: ----req_u@packet_setsockopt
Variable was created at:
packet_setsockopt+0x13f/0x5a90 net/packet/af_packet.c:3612
SYSC_setsockopt+0x4b8/0x570 net/socket.c:1849
Fixes: f6fb8f100b80 ("af-packet: TPACKET_V3 flexible buffer implementation.")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Due to a firmware bug, the hypervisor can send an interrupt to a
transmit or receive queue just prior to a partition migration, not
allowing the device enough time to handle it and send an EOI. When
the partition migrates, the interrupt is lost but an "EOI-pending"
flag for the interrupt line is still set in firmware. No further
interrupts will be sent until that flag is cleared, effectively
freezing that queue. To workaround this, the driver will disable the
hardware interrupt and send an H_EOI signal prior to re-enabling it.
This will flush the pending EOI and allow the driver to continue
operation.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Clear tp->packets_out when purging the write queue, otherwise
tcp_rearm_rto() mistakenly assumes TCP write queue is not empty.
This results in NULL pointer dereference.
Also, remove the redundant `tp->packets_out = 0` from
tcp_disconnect(), since tcp_disconnect() calls
tcp_write_queue_purge().
Fixes: a27fd7a8ed38 (tcp: purge write queue upon RST)
Reported-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Reported-by: Sami Farin <hvtaifwkbgefbaei@gmail.com>
Tested-by: Sami Farin <hvtaifwkbgefbaei@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Enable test cases for the kernel's fallback to label-less mode.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
|
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Sysfs userspace tooling generally expects the kernel to emit a newlines
when reading sysfs attributes.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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The nfit_test.1 bus provides a pmem topology without blk-aperture
enabling, so it presents different failure modes for label space
handling. Allow custom DSM command error injection.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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Given that libnvdimm driver stack takes specific actions on DIMM command
error codes like -EACCES, provide a facility to inject custom failures.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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The new support for the standard _LSR and _LSW methods neglected to also
update the nvdimm_init_config_data() and nvdimm_set_config_data() to
return the translated error code from failed commands. This precision is
necessary because the locked status that was previously returned on
ND_CMD_GET_CONFIG_SIZE commands is now returned on
ND_CMD_{GET,SET}_CONFIG_DATA commands.
If the kernel misses this indication it can inadvertently fall back to
label-less mode when it should otherwise avoid all access to locked
regions.
Cc: <stable@vger.kernel.org>
Fixes: 4b27db7e26cd ("acpi, nfit: add support for the _LSI, _LSR, and...")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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When parsing the options provided by the user space,
team_nl_cmd_options_set() insert them in a temporary list to send
multiple events with a single message.
While each option's attribute is correctly validated, the code does
not check for duplicate entries before inserting into the event
list.
Exploiting the above, the syzbot was able to trigger the following
splat:
kernel BUG at lib/list_debug.c:31!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 4466 Comm: syzkaller556835 Not tainted 4.16.0+ #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__list_add_valid+0xaa/0xb0 lib/list_debug.c:29
RSP: 0018:ffff8801b04bf248 EFLAGS: 00010286
RAX: 0000000000000058 RBX: ffff8801c8fc7a90 RCX: 0000000000000000
RDX: 0000000000000058 RSI: ffffffff815fbf41 RDI: ffffed0036097e3f
RBP: ffff8801b04bf260 R08: ffff8801b0b2a700 R09: ffffed003b604f90
R10: ffffed003b604f90 R11: ffff8801db027c87 R12: ffff8801c8fc7a90
R13: ffff8801c8fc7a90 R14: dffffc0000000000 R15: 0000000000000000
FS: 0000000000b98880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000043fc30 CR3: 00000001afe8e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__list_add include/linux/list.h:60 [inline]
list_add include/linux/list.h:79 [inline]
team_nl_cmd_options_set+0x9ff/0x12b0 drivers/net/team/team.c:2571
genl_family_rcv_msg+0x889/0x1120 net/netlink/genetlink.c:599
genl_rcv_msg+0xc6/0x170 net/netlink/genetlink.c:624
netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448
genl_rcv+0x28/0x40 net/netlink/genetlink.c:635
netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
netlink_unicast+0x58b/0x740 net/netlink/af_netlink.c:1336
netlink_sendmsg+0x9f0/0xfa0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:629 [inline]
sock_sendmsg+0xd5/0x120 net/socket.c:639
___sys_sendmsg+0x805/0x940 net/socket.c:2117
__sys_sendmsg+0x115/0x270 net/socket.c:2155
SYSC_sendmsg net/socket.c:2164 [inline]
SyS_sendmsg+0x29/0x30 net/socket.c:2162
do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4458b9
RSP: 002b:00007ffd1d4a7278 EFLAGS: 00000213 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000000001b RCX: 00000000004458b9
RDX: 0000000000000010 RSI: 0000000020000d00 RDI: 0000000000000004
RBP: 00000000004a74ed R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000213 R12: 00007ffd1d4a7348
R13: 0000000000402a60 R14: 0000000000000000 R15: 0000000000000000
Code: 75 e8 eb a9 48 89 f7 48 89 75 e8 e8 d1 85 7b fe 48 8b 75 e8 eb bb 48
89 f2 48 89 d9 4c 89 e6 48 c7 c7 a0 84 d8 87 e8 ea 67 28 fe <0f> 0b 0f 1f
40 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41
RIP: __list_add_valid+0xaa/0xb0 lib/list_debug.c:29 RSP: ffff8801b04bf248
This changeset addresses the avoiding list_add() if the current
option is already present in the event list.
Reported-and-tested-by: syzbot+4d4af685432dc0e56c91@syzkaller.appspotmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Fixes: 2fcdb2c9e659 ("team: allow to send multiple set events in one message")
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Fast forwarding -fixes for 4.17.
Signed-off-by: Sean Paul <seanpaul@chromium.org>
|
|
When we patch an alternate feature section, we have to adjust any
relative branches that branch out of the alternate section.
But currently we have a bug if we have a branch that points to past
the last instruction of the alternate section, eg:
FTR_SECTION_ELSE
1: b 2f
or 6,6,6
2:
ALT_FTR_SECTION_END(...)
nop
This will result in a relative branch at 1 with a target that equals
the end of the alternate section.
That branch does not need adjusting when it's moved to the non-else
location. Currently we do adjust it, resulting in a branch that goes
off into the link-time location of the else section, which is junk.
The fix is to not patch branches that have a target == end of the
alternate section.
Fixes: d20fe50a7b3c ("KVM: PPC: Book3S HV: Branch inside feature section")
Fixes: 9b1a735de64c ("powerpc: Add logic to patch alternative feature sections")
Cc: stable@vger.kernel.org # v2.6.27+
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
|
