linux-kernel - Re: [syzbot] Re: kernel BUG in free

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Message-ID: <6729fedf.050a0220.701a.001b.GAE@google.com>
Date: Tue, 05 Nov 2024 03:17:51 -0800
From: syzbot <syzbot+03e1af5c332f7e0eb84b@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] Re: kernel BUG in free_bprm()

For archival purposes, forwarding an incoming command email to
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***

Subject: Re: kernel BUG in free_bprm()
Author: dmantipov@...dex.ru

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next 850f22c42f4b0a14a015aecc26f46f9948ded6dd

diff --git a/fs/exec.c b/fs/exec.c
index ef18eb0ea5b4..df70ed8e36fe 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1496,7 +1496,8 @@ static void free_bprm(struct linux_binprm *bprm)
 	if (bprm->interp != bprm->filename)
 		kfree(bprm->interp);
 	kfree(bprm->fdpath);
-	kfree(bprm->argv0);
+	if (!IS_ERR(bprm->argv0))
+		kfree(bprm->argv0);
 	kfree(bprm);
 }