Commit 7ff985ed authored Nov 14, 2022 by Christophe Leroy Committed by zhaoxiaoqiang11 Aug 14, 2023

objtool: Fix SEGFAULT

stable inclusion
from stable-v5.10.163
commit 0af0e115ff59d638f45416a004cdd8edb38db40c
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7PJ9N

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=0af0e115ff59d638f45416a004cdd8edb38db40c



----------------------------------------------------

[ Upstream commit efb11fdb ]

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@linux.vnet.ibm.com>
Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221114175754.1131267-9-sv@linux.ibm.com


Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: zhaoxiaoqiang11 <zhaoxiaoqiang11@jd.com>

parent 8122a583

tools/objtool/check.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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) {