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Commit f12d5bfc authored by Linus Torvalds's avatar Linus Torvalds
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futex: fix handling of read-only-mapped hugepages



The hugepage code had the exact same bug that regular pages had in
commit 7485d0d3 ("futexes: Remove rw parameter from
get_futex_key()").

The regular page case was fixed by commit 9ea71503 ("futex: Fix
regression with read only mappings"), but the transparent hugepage case
(added in a5b338f2: "thp: update futex compound knowledge") case
remained broken.

Found by Dave Jones and his trinity tool.

Reported-and-tested-by: default avatarDave Jones <davej@fedoraproject.org>
Cc: stable@kernel.org # v2.6.38+
Acked-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Darren Hart <dvhart@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 9538e100
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