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(parent: d0f0223) | patch
proc: check permissions earlier for /proc/*/wchan
authorAlexey Dobriyan <[email protected]>
Tue, 10 Apr 2018 23:31:30 +0000 (16:31 -0700)
committerLinus Torvalds <[email protected]>
Wed, 11 Apr 2018 17:28:33 +0000 (10:28 -0700)
commit24b2ec21192c963c17a1b687b6171e95e8b59c06
treeb306741760dc34e5c408055ddf84fb9d253ebdb4tree | snapshot
parentd0f02231222b313d1b49278cd2e3c7e7406fea6dcommit | diff
proc: check permissions earlier for /proc/*/wchan

get_wchan() accesses stack page before permissions are checked, let's
not play this game.

Link: http://lkml.kernel.org/r/20180217071923.GA16074@avx2
Signed-off-by: Alexey Dobriyan <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Rasmus Villemoes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
fs/proc/base.c diff | blob | history
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