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Subject[PATCH 5.10 04/20] ubsan: no need to unset panic_on_warn in ubsan_epilogue()
Date
From: Tiezhu Yang <yangtiezhu@loongson.cn>

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>
---
lib/ubsan.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/lib/ubsan.c b/lib/ubsan.c
index adf8dcf3c84e6..d81d107f64f41 100644
--- a/lib/ubsan.c
+++ b/lib/ubsan.c
@@ -151,16 +151,8 @@ 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");
- }
}

static void handle_overflow(struct overflow_data *data, void *lhs,
--
2.39.1
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