Re: [syzbot] Re: kernel BUG in free_bprm()

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Subject: Re: kernel BUG in free_bprm()
Author: dmantipov@xxxxxxxxx

#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);
 }