This is a note to let you know that I've just added the patch titled
objtool: Fix SEGFAULT
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
objtool-fix-segfault.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4c78d92b372348b1920d74035237dd831df3c296
Author: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Date: Mon Nov 14 23:27:46 2022 +0530
objtool: Fix SEGFAULT
[ Upstream commit efb11fdb3e1a9f694fa12b70b21e69e55ec59c36 ]
find_insn() will return NULL in case of failure. Check insn in order
to avoid a kernel Oops for NULL pointer dereference.
Tested-by: Naveen N. Rao <naveen.n.rao@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Naveen N. Rao <naveen.n.rao@xxxxxxxxxxxxxxxxxx>
Acked-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221114175754.1131267-9-sv@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 5d64b673da2d..700984e7f5ba 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -196,7 +196,7 @@ static bool __dead_end_function(struct objtool_file *file, struct symbol *func,
return false;
insn = find_insn(file, func->sec, func->offset);
- if (!insn->func)
+ if (!insn || !insn->func)
return false;
func_for_each_insn(file, func, insn) {
