Messages in this thread Patch in this message |  | | Date | Thu, 09 Jul 2020 09:22:51 -0000 | From | "tip-bot2 for Thomas Gleixner" <> | Subject | [tip: x86/urgent] x86/traps: Disable interrupts in exc_aligment_check() |
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The following commit has been merged into the x86/urgent branch of tip:
Commit-ID: bce9b042ec73e8662b8119d4ca47e7c78b20d0bf Gitweb: https://git.kernel.org/tip/bce9b042ec73e8662b8119d4ca47e7c78b20d0bf Author: Thomas Gleixner <tglx@linutronix.de> AuthorDate: Wed, 08 Jul 2020 21:28:05 +02:00 Committer: Thomas Gleixner <tglx@linutronix.de> CommitterDate: Thu, 09 Jul 2020 11:18:29 +02:00
x86/traps: Disable interrupts in exc_aligment_check()
exc_alignment_check() fails to disable interrupts before returning to the entry code.
Fixes: ca4c6a9858c2 ("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
--- arch/x86/kernel/traps.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 6ed8cc5..4f3a509 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -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
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