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| author | Li Huafei <lihuafei1@huawei.com> | 2022-03-10 20:09:15 +0800 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-03-11 19:19:30 +0100 |
| commit | a365a65f9ca1ceb9cf1ac29db4a4f51df7c507ad (patch) | |
| tree | 7490c717d49df19483e36eb3bd4e22a092b7a3a8 | |
| parent | 445c1470b6ef96440e7cfc42dfc160f5004fd149 (diff) | |
| download | lwn-a365a65f9ca1ceb9cf1ac29db4a4f51df7c507ad.tar.gz lwn-a365a65f9ca1ceb9cf1ac29db4a4f51df7c507ad.zip | |
x86/traps: Mark do_int3() NOKPROBE_SYMBOL
Since kprobe_int3_handler() is called in do_int3(), probing do_int3()
can cause a breakpoint recursion and crash the kernel. Therefore,
do_int3() should be marked as NOKPROBE_SYMBOL.
Fixes: 21e28290b317 ("x86/traps: Split int3 handler up")
Signed-off-by: Li Huafei <lihuafei1@huawei.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220310120915.63349-1-lihuafei1@huawei.com
| -rw-r--r-- | arch/x86/kernel/traps.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index c9d566dcf89a..8143693a7ea6 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -659,6 +659,7 @@ static bool do_int3(struct pt_regs *regs) return res == NOTIFY_STOP; } +NOKPROBE_SYMBOL(do_int3); static void do_int3_user(struct pt_regs *regs) { |