From: syzbot ci <syzbot+ci684179a8afcfdab1@syzkaller.appspotmail.com>
To: dxdt@dev.snart.me, linkinjeon@kernel.org,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
sj1557.seo@samsung.com, yuezhang.mo@sony.com
Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com
Subject: [syzbot ci] Re: exfat: add limited FALLOC_FL_ZERO_RANGE support
Date: Fri, 20 Mar 2026 01:16:46 -0700 [thread overview]
Message-ID: <69bd026e.050a0220.3bf4de.0012.GAE@google.com> (raw)
In-Reply-To: <20260319043553.301185-1-dxdt@dev.snart.me>
syzbot ci has tested the following series
[v0] exfat: add limited FALLOC_FL_ZERO_RANGE support
https://lore.kernel.org/all/20260319043553.301185-1-dxdt@dev.snart.me
* [PATCH v0 1/1] exfat: add limited FALLOC_FL_ZERO_RANGE support
and found the following issue:
WARNING: lock held when returning to user space in exfat_fallocate
Full report is available here:
https://ci.syzbot.org/series/a58a79c9-a4e7-40b7-a5d3-8d4da244a00c
***
WARNING: lock held when returning to user space in exfat_fallocate
tree: linux-next
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next
base: b5d083a3ed1e2798396d5e491432e887da8d4a06
arch: amd64
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
config: https://ci.syzbot.org/builds/6a43cfef-5b9a-4b39-a6b0-7d34bfb0f7b7/config
C repro: https://ci.syzbot.org/findings/87d27fd2-e5b7-4174-8faf-3b746f7aa18d/c_repro
syz repro: https://ci.syzbot.org/findings/87d27fd2-e5b7-4174-8faf-3b746f7aa18d/syz_repro
exFAT-fs (loop0): failed to load upcase table (idx : 0x0000fd4f, chksum : 0x395e47cf, utbl_chksum : 0xe619d30d)
exFAT-fs (loop0): valid_size(150994954) is greater than size(10)
================================================
WARNING: lock held when returning to user space!
syzkaller #0 Not tainted
------------------------------------------------
syz.0.17/5982 is leaving the kernel with locks still held!
1 lock held by syz.0.17/5982:
#0: ffff8881bc75c110 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline]
#0: ffff8881bc75c110 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: exfat_fallocate+0x163/0x4e0 fs/exfat/file.c:131
***
If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
Tested-by: syzbot@syzkaller.appspotmail.com
---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@googlegroups.com.
next prev parent reply other threads:[~2026-03-20 8:16 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-19 4:35 [PATCH v0 0/1] exfat: add limited FALLOC_FL_ZERO_RANGE support David Timber
2026-03-19 4:35 ` [PATCH v0 1/1] " David Timber
2026-03-23 7:59 ` Dan Carpenter
2026-03-20 8:16 ` syzbot ci [this message]
2026-03-22 12:35 ` [syzbot ci] " David Timber
2026-03-22 12:38 ` syzbot ci
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