From: Josh Poimboeuf <jpoim...@kernel.org>
To avoid continued attempted use of a bad .sframe section, remove it
on demand when the first sign of corruption is detected.
Signed-off-by: Josh Poimboeuf <jpoim...@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rost...@goodmis.org>
---
kernel/unwind/sframe.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/kernel/unwind/sframe.c b/kernel/unwind/sframe.c
index b10420d19840..f246ead6c2a0 100644
--- a/kernel/unwind/sframe.c
+++ b/kernel/unwind/sframe.c
@@ -310,6 +310,10 @@ int sframe_find(unsigned long ip, struct unwind_user_frame
*frame)
ret = __find_fre(sec, &fde, ip, frame);
end:
user_read_access_end();
+
+ if (ret == -EFAULT)
+ WARN_ON_ONCE(sframe_remove_section(sec->sframe_start));
+
return ret;
}
--
2.47.2
