linux-kernel - Re: [syzbot] [block?] kernel BUG in bio

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <tencent_3DF47A826C5C2C056C8C96ACEBF6EDBACD0A@qq.com>
Date: Mon,  8 Dec 2025 12:20:36 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+f6539d4ce3f775aee0cc@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [block?] kernel BUG in bio_chain

#syz test

diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 97ebe457c00a..2de334034c74 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -484,6 +484,10 @@ static struct bio *gfs2_chain_bio(struct bio *prev, unsigned int nr_iovecs)
 	new = bio_alloc(prev->bi_bdev, nr_iovecs, prev->bi_opf, GFP_NOIO);
 	bio_clone_blkg_association(new, prev);
 	new->bi_iter.bi_sector = bio_end_sector(prev);
+	new->bi_end_io = prev->bi_end_io;
+	new->bi_private = prev->bi_private;
+	prev->bi_end_io = NULL;
+	prev->bi_private = NULL;
 	bio_chain(prev, new);
 	submit_bio(prev);
 	return new;