Message-ID: <000000000000c925dc0604f9e2ef@google.com>
Date:   Sat, 09 Sep 2023 21:45:58 -0700
From:   syzbot <syzbot+577d06779fa95206ba66@...kaller.appspotmail.com>
To:     agruenba@...hat.com, gfs2@...ts.linux.dev,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        rpeterso@...hat.com, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [gfs2?] BUG: sleeping function called from invalid context
 in gfs2_withdraw

Hello,

syzbot found the following issue on:

HEAD commit:    65d6e954e378 Merge tag 'gfs2-v6.5-rc5-fixes' of git://git...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10994bcc680000
kernel config:  https://syzkaller.appspot.com/x/.config?x=cbf8b29a87b8a830
dashboard link: https://syzkaller.appspot.com/bug?extid=577d06779fa95206ba66
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10cd8e20680000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=115ddba8680000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-65d6e954.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/040b1e85a692/vmlinux-65d6e954.xz
kernel image: https://storage.googleapis.com/syzbot-assets/984f55ac441b/bzImage-65d6e954.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/cd97a0244981/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+577d06779fa95206ba66@...kaller.appspotmail.com

loop0: rw=1, sector=3280942697285464, nr_sectors = 8 limit=32768
gfs2: fsid=syz:syz.0: Error 10 writing to journal, jid=0
gfs2: fsid=syz:syz.0: fatal: I/O error(s)
gfs2: fsid=syz:syz.0: about to withdraw this file system
BUG: sleeping function called from invalid context at fs/gfs2/util.c:157
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5141, name: syz-executor200
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 PID: 5141 Comm: syz-executor200 Not tainted 6.5.0-syzkaller-11938-g65d6e954e378 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106
 __might_resched+0x3c3/0x5e0 kernel/sched/core.c:10187
 signal_our_withdraw fs/gfs2/util.c:157 [inline]
 gfs2_withdraw+0xc7d/0x1280 fs/gfs2/util.c:342
 gfs2_ail1_empty+0x8cc/0xab0 fs/gfs2/log.c:377
 gfs2_flush_revokes+0x6b/0x90 fs/gfs2/log.c:815
 revoke_lo_before_commit+0x22/0x640 fs/gfs2/lops.c:867
 lops_before_commit fs/gfs2/lops.h:40 [inline]
 gfs2_log_flush+0x105e/0x27f0 fs/gfs2/log.c:1101
 gfs2_write_inode+0x24a/0x4b0 fs/gfs2/super.c:453
 write_inode fs/fs-writeback.c:1456 [inline]
 __writeback_single_inode+0xa81/0xe70 fs/fs-writeback.c:1668
 writeback_single_inode+0x2af/0x590 fs/fs-writeback.c:1724
 sync_inode_metadata+0xa5/0xe0 fs/fs-writeback.c:2786
 gfs2_fsync+0x218/0x380 fs/gfs2/file.c:761
 vfs_fsync_range+0x141/0x220 fs/sync.c:188
 generic_write_sync include/linux/fs.h:2625 [inline]
 gfs2_file_write_iter+0xd97/0x10c0 fs/gfs2/file.c:1150
 call_write_iter include/linux/fs.h:1985 [inline]
 do_iter_readv_writev+0x21e/0x3c0 fs/read_write.c:735
 do_iter_write+0x17f/0x830 fs/read_write.c:860
 vfs_iter_write+0x7a/0xb0 fs/read_write.c:901
 iter_file_splice_write+0x698/0xbf0 fs/splice.c:736
 do_splice_from fs/splice.c:933 [inline]
 direct_splice_actor+0x118/0x180 fs/splice.c:1142
 splice_direct_to_actor+0x347/0xa30 fs/splice.c:1088
 do_splice_direct+0x1af/0x280 fs/splice.c:1194
 do_sendfile+0xb88/0x1390 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x1d6/0x220 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f86c8957779
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffef8d7a208 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007ffef8d7a3d8 RCX: 00007f86c8957779
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007f86c89dc610 R08: 00007ffef8d7a3d8 R09: 00007ffef8d7a3d8
R10: 0001000000201004 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffef8d7a3c8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
BUG: scheduling while atomic: syz-executor200/5141/0x00000002
INFO: lockdep is turned off.
Modules linked in:
Preemption disabled at:
[<0000000000000000>] 0x0


---
This report is generated by a bot. It may contain errors.
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