linux-kernel - Re: [syzbot] [netfs?] INFO: task hung in netfs_unbuffered_write

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Message-ID: <688f515e.050a0220.13f73d.0000.GAE@google.com>
Date: Sun, 03 Aug 2025 05:09:02 -0700
From: syzbot <syzbot+62262fdc0e01d99573fc@...kaller.appspotmail.com>
To: asmadeus@...ewreck.org, brauner@...nel.org, dhowells@...hat.com, 
	eadavis@...com, ericvh@...nel.org, hdanton@...a.com, jack@...e.cz, 
	jlayton@...nel.org, kprateek.nayak@....com, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux_oss@...debyte.com, lucho@...kov.net, 
	mjguzik@...il.com, netfs@...ts.linux.dev, oleg@...hat.com, pc@...guebit.org, 
	sfrench@...ba.org, swapnil.sapkal@....com, syzkaller-bugs@...glegroups.com, 
	v9fs@...ts.linux.dev, viro@...iv.linux.org.uk
Subject: Re: [syzbot] [netfs?] INFO: task hung in netfs_unbuffered_write_iter

syzbot suspects this issue was fixed by commit:

commit da8cf4bd458722d090a788c6e581eeb72695c62f
Author: David Howells <dhowells@...hat.com>
Date:   Tue Jul 1 16:38:36 2025 +0000

    netfs: Fix hang due to missing case in final DIO read result collection

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14cfbcf0580000
start commit:   66701750d556 Merge tag 'io_uring-6.16-20250630' of git://g..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=e29b8115bf337f53
dashboard link: https://syzkaller.appspot.com/bug?extid=62262fdc0e01d99573fc
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1400348c580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17b2048c580000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: netfs: Fix hang due to missing case in final DIO read result collection

For information about bisection process see: https://goo.gl/tpsmEJ#bisection