This is a note to let you know that I've just added the patch titled objtool: Fix SEGFAULT to the 5.15-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-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit a972ec86529743aa9191d5884dec9fdf3e93a03d 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 edac5aaa2802..308c8806ad94 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -197,7 +197,7 @@ 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) {