linux-stable/kernel/futex
Peter Zijlstra c9bd1568d5 futex: Fix hardcoded flags
Xi reported that commit 5694289ce1 ("futex: Flag conversion") broke
glibc's robust futex tests.

This was narrowed down to the change of FLAGS_SHARED from 0x01 to
0x10, at which point Florian noted that handle_futex_death() has a
hardcoded flags argument of 1.

Change this to: FLAGS_SIZE_32 | FLAGS_SHARED, matching how
futex_to_flags() unconditionally sets FLAGS_SIZE_32 for all legacy
futex ops.

Reported-by: Xi Ruoyao <xry111@xry111.site>
Reported-by: Florian Weimer <fweimer@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20231114201402.GA25315@noisy.programming.kicks-ass.net
Fixes: 5694289ce1 ("futex: Flag conversion")
Cc: <stable@vger.kernel.org>
2023-11-15 04:02:25 +01:00
..
core.c futex: Fix hardcoded flags 2023-11-15 04:02:25 +01:00
futex.h futex: make the vectored futex operations available 2023-09-29 02:37:07 -06:00
Makefile futex: Split out wait/wake 2021-10-07 13:51:11 +02:00
pi.c futex: Propagate flags into get_futex_key() 2023-09-21 19:22:09 +02:00
requeue.c io_uring-futex-2023-10-30 2023-11-01 11:25:08 -10:00
syscalls.c futex: make futex_parse_waitv() available as a helper 2023-09-29 02:37:05 -06:00
waitwake.c futex: make the vectored futex operations available 2023-09-29 02:37:07 -06:00