linux-kernel - Re: [syzbot] [block?] BUG: sleeping function called from invalid context in unmap_mapping

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Message-ID: <67a2fdeb.050a0220.50516.000e.GAE@google.com>
Date: Tue, 04 Feb 2025 21:58:03 -0800
From: syzbot <syzbot+95f1db35defd8524f1dd@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, ansuelsmth@...il.com, axboe@...nel.dk, 
	david@...hat.com, dianders@...gle.com, kirill.shutemov@...ux.intel.com, 
	lilingfeng3@...wei.com, linux-block@...r.kernel.org, 
	linux-kernel@...r.kernel.org, riyandhiman14@...il.com, 
	syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: Re: [syzbot] [block?] BUG: sleeping function called from invalid
 context in unmap_mapping_folio

syzbot has bisected this issue to:

commit 1760a1b5aacbe00dec464b1bf2b10443c10377ad
Author: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Date:   Thu Jan 30 10:00:45 2025 +0000

    mm/vmscan: use PG_dropbehind instead of PG_reclaim in shrink_folio_list()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14c2ef64580000
start commit:   40b8e93e17bf Add linux-next specific files for 20250204
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=16c2ef64580000
console output: https://syzkaller.appspot.com/x/log.txt?x=12c2ef64580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ec880188a87c6aad
dashboard link: https://syzkaller.appspot.com/bug?extid=95f1db35defd8524f1dd
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16010df8580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12f078a4580000

Reported-by: syzbot+95f1db35defd8524f1dd@...kaller.appspotmail.com
Fixes: 1760a1b5aacb ("mm/vmscan: use PG_dropbehind instead of PG_reclaim in shrink_folio_list()")

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