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| author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2019-11-21 17:54:01 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-11-22 09:11:18 -0800 |
| commit | 9a63236f1ad82d71a98aa80320b6cb618fb32f44 (patch) | |
| tree | 84ff12b4f2967d245c12cf03abfb9f84e9680da1 /crypto/crypto_engine.c | |
| parent | 7ce700bf11b5e2cb84e4352bbdf2123a7a239c84 (diff) | |
| download | linux-9a63236f1ad82d71a98aa80320b6cb618fb32f44.tar.gz linux-9a63236f1ad82d71a98aa80320b6cb618fb32f44.tar.bz2 linux-9a63236f1ad82d71a98aa80320b6cb618fb32f44.zip | |
mm/ksm.c: don't WARN if page is still mapped in remove_stable_node()
It's possible to hit the WARN_ON_ONCE(page_mapped(page)) in
remove_stable_node() when it races with __mmput() and squeezes in
between ksm_exit() and exit_mmap().
WARNING: CPU: 0 PID: 3295 at mm/ksm.c:888 remove_stable_node+0x10c/0x150
Call Trace:
remove_all_stable_nodes+0x12b/0x330
run_store+0x4ef/0x7b0
kernfs_fop_write+0x200/0x420
vfs_write+0x154/0x450
ksys_write+0xf9/0x1d0
do_syscall_64+0x99/0x510
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Remove the warning as there is nothing scary going on.
Link: http://lkml.kernel.org/r/20191119131850.5675-1-aryabinin@virtuozzo.com
Fixes: cbf86cfe04a6 ("ksm: remove old stable nodes more thoroughly")
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'crypto/crypto_engine.c')
0 files changed, 0 insertions, 0 deletions