linux-kernel - Re: [syzbot] Re: [syzbot] [v9fs?] WARNING in __alloc_frozen_pages

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Message-ID: <6759fe55.050a0220.1ac542.0011.GAE@google.com>
Date: Wed, 11 Dec 2024 13:04:21 -0800
From: syzbot <syzbot+03fb58296859d8dbab4d@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] Re: [syzbot] [v9fs?] WARNING in __alloc_frozen_pages_noprof

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Subject: Re: [syzbot] [v9fs?] WARNING in __alloc_frozen_pages_noprof
Author: leocstone@...il.com

#syz test

diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index eed551d8555f..1b9681d58f8d 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -28,6 +28,8 @@ static struct posix_acl *v9fs_fid_get_acl(struct p9_fid *fid, const char *name)
 		return ERR_PTR(size);
 	if (size == 0)
 		return ERR_PTR(-ENODATA);
+	if (size > KMALLOC_MAX_SIZE)
+		return ERR_PTR(-ERANGE);
 
 	value = kzalloc(size, GFP_NOFS);
 	if (!value)