https://github.com/torvalds/linux
Revision 22eab1108781eff09961ae7001704f7bd8fb1dce authored by Dmitry V. Levin on 30 November 2015, 21:54:36 UTC, committed by Thomas Gleixner on 05 December 2015, 17:52:14 UTC
When restarting a syscall with regs->ax == -ERESTART_RESTARTBLOCK,
regs->ax is assigned to a restart_syscall number.  For x32 tasks, this
syscall number must have __X32_SYSCALL_BIT set, otherwise it will be
an x86_64 syscall number instead of a valid x32 syscall number. This
issue has been there since the introduction of x32.

Reported-by: strace/tests/restart_syscall.test
Reported-and-tested-by: Elvira Khabirova <lineprinter0@gmail.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Cc: Elvira Khabirova <lineprinter0@gmail.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20151130215436.GA25996@altlinux.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
1 parent 8e8efe0
History
Tip revision: 22eab1108781eff09961ae7001704f7bd8fb1dce authored by Dmitry V. Levin on 30 November 2015, 21:54:36 UTC
x86/signal: Fix restart_syscall number for x32 tasks
Tip revision: 22eab11
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