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authorLi Huafei <[email protected]>2022-03-10 20:09:15 +0800
committerBorislav Petkov <[email protected]>2022-03-11 19:19:30 +0100
commita365a65f9ca1ceb9cf1ac29db4a4f51df7c507ad (patch)
tree7490c717d49df19483e36eb3bd4e22a092b7a3a8
parent445c1470b6ef96440e7cfc42dfc160f5004fd149 (diff)
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 <[email protected]> Signed-off-by: Borislav Petkov <[email protected]> Acked-by: Masami Hiramatsu <[email protected]> Cc: <[email protected]> Link: https://lore.kernel.org/r/[email protected]
-rw-r--r--arch/x86/kernel/traps.c1
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)
{