From: Steven Rostedt <rostedt@kernel.org>
To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
bpf@vger.kernel.org, x86@kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>, Jiri Olsa <jolsa@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Andrii Nakryiko <andrii@kernel.org>,
Indu Bhagat <indu.bhagat@oracle.com>,
"Jose E. Marchesi" <jemarch@gnu.org>,
Beau Belgrave <beaub@linux.microsoft.com>,
Jens Remus <jremus@linux.ibm.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Florian Weimer <fweimer@redhat.com>, Sam James <sam@gentoo.org>,
Kees Cook <kees@kernel.org>,
"Carlos O'Donell" <codonell@redhat.com>
Subject: [PATCH v10 08/11] unwind_user/sframe: Remove .sframe section on detected corruption
Date: Wed, 27 Aug 2025 16:15:56 -0400 [thread overview]
Message-ID: <20250827202441.441080427@kernel.org> (raw)
In-Reply-To: 20250827201548.448472904@kernel.org
From: Josh Poimboeuf <jpoimboe@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 <jpoimboe@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@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;
}
--
2.50.1
next prev parent reply other threads:[~2025-08-27 20:24 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-27 20:15 [PATCH v10 00/11] unwind_deferred: Implement sframe handling Steven Rostedt
2025-08-27 20:15 ` [PATCH v10 01/11] unwind_user/sframe: Add support for reading .sframe headers Steven Rostedt
2025-08-27 20:15 ` [PATCH v10 02/11] unwind_user/sframe: Store sframe section data in per-mm maple tree Steven Rostedt
2025-08-28 1:46 ` Liam R. Howlett
2025-08-28 14:28 ` Steven Rostedt
2025-08-28 15:27 ` Liam R. Howlett
2025-08-28 15:51 ` Steven Rostedt
2025-08-27 20:15 ` [PATCH v10 03/11] x86/uaccess: Add unsafe_copy_from_user() implementation Steven Rostedt
2025-08-27 20:15 ` [PATCH v10 04/11] unwind_user/sframe: Add support for reading .sframe contents Steven Rostedt
2025-08-27 20:15 ` [PATCH v10 05/11] unwind_user/sframe: Detect .sframe sections in executables Steven Rostedt
2025-08-27 20:15 ` [PATCH v10 06/11] unwind_user/sframe: Wire up unwind_user to sframe Steven Rostedt
2025-08-27 20:15 ` [PATCH v10 07/11] unwind_user/sframe/x86: Enable sframe unwinding on x86 Steven Rostedt
2025-08-27 20:15 ` Steven Rostedt [this message]
2025-08-27 20:15 ` [PATCH v10 09/11] unwind_user/sframe: Show file name in debug output Steven Rostedt
2025-08-27 20:15 ` [PATCH v10 10/11] unwind_user/sframe: Add .sframe validation option Steven Rostedt
2025-08-27 20:15 ` [PATCH v10 11/11] [DO NOT APPLY]unwind_user/sframe: Add prctl() interface for registering .sframe sections Steven Rostedt
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