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x86/traps: Disable interrupts in exc_aligment_check()

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exc_alignment_check() fails to disable interrupts before returning to the
entry code.

Fixes: ca4c6a9858 ("x86/traps: Make interrupt enable/disable symmetric in C code")
Reported-by: syzbot+0889df9502bc0f112b31@syzkaller.appspotmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200708192934.076519438@linutronix.de
This commit is contained in:
Thomas Gleixner 2020-07-08 21:28:05 +02:00
parent a4c0e91d1d
commit bce9b042ec
1 changed files with 2 additions and 0 deletions
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arch/x86/kernel/traps.c
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@ -299,6 +299,8 @@ DEFINE_IDTENTRY_ERRORCODE(exc_alignment_check)
do_trap(X86_TRAP_AC, SIGBUS, "alignment check", regs,
error_code, BUS_ADRALN, NULL);
local_irq_disable();
}
#ifdef CONFIG_VMAP_STACK