From cfed522e0f1b3a872b1acaab17226f11cb61f439 Mon Sep 17 00:00:00 2001 Message-ID: In-Reply-To: <7f56d9ee24976d45babdc3856c85d47df2ae8a13.1752857321.git.sam@gentoo.org> References: <7f56d9ee24976d45babdc3856c85d47df2ae8a13.1752857321.git.sam@gentoo.org> From: Josh Poimboeuf Date: Wed, 16 Jul 2025 21:28:56 -0400 Subject: [PATCH 31/34] unwind_user/sframe: Remove .sframe section on detected corruption 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 Signed-off-by: Steven Rostedt (Google) --- kernel/unwind/sframe.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/unwind/sframe.c b/kernel/unwind/sframe.c index b10420d198405..f246ead6c2a02 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; } -- 2.50.1