ubsan: no need to unset panic_on_warn in ubsan_epilogue()

commit d83ce027a54068fabb70d2c252e1ce2da86784a4 upstream.

panic_on_warn is unset inside panic(), so no need to unset it before
calling panic() in ubsan_epilogue().

Link: https://lkml.kernel.org/r/1644324666-15947-5-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Xuefeng Li <lixuefeng@loongson.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/lib/ubsan.c b/lib/ubsan.c
index bdc380f..36bd75e 100644 (file)
--- a/lib/ubsan.c
+++ b/lib/ubsan.c
@@ -154,16 +154,8 @@ static void ubsan_epilogue(void)
 
        current->in_ubsan--;
 
-       if (panic_on_warn) {
-               /*
-                * This thread may hit another WARN() in the panic path.
-                * Resetting this prevents additional WARN() from panicking the
-                * system on this thread.  Other threads are blocked by the
-                * panic_mutex in panic().
-                */
-               panic_on_warn = 0;
+       if (panic_on_warn)
                panic("panic_on_warn set ...\n");
-       }
 }
 
 void __ubsan_handle_divrem_overflow(void *_data, void *lhs, void *rhs)