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Date: Tue, 27 Dec 2022 15:35:05 -0500 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Christophe Leroy <christophe.leroy@...roup.eu>, "Naveen N . Rao" <naveen.n.rao@...ux.vnet.ibm.com>, Josh Poimboeuf <jpoimboe@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Michael Ellerman <mpe@...erman.id.au>, Sasha Levin <sashal@...nel.org> Subject: [PATCH AUTOSEL 5.10 2/7] objtool: Fix SEGFAULT From: Christophe Leroy <christophe.leroy@...roup.eu> [ 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@...ux.vnet.ibm.com> Reviewed-by: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com> Acked-by: Josh Poimboeuf <jpoimboe@...nel.org> Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org> Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu> Signed-off-by: Michael Ellerman <mpe@...erman.id.au> Link: https://lore.kernel.org/r/20221114175754.1131267-9-sv@linux.ibm.com Signed-off-by: Sasha Levin <sashal@...nel.org> --- tools/objtool/check.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index ea80b29b9913..654ffb51e1dd 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) { -- 2.35.1
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