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/glock.c:1281
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4455, name: syz.1.17
5 locks held by syz.1.17/4455:
 #0: ffff888077a0eaf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2bf/0x370 fs/file.c:1056
 #1: ffff888060754460 (sb_writers#15){.+.+}-{0:0}, at: vfs_write+0x28a/0xd00 fs/read_write.c:590
 #2: ffff88806282d2b0 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
 #2: ffff88806282d2b0 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: gfs2_file_write_iter+0x33b/0x11d0 fs/gfs2/file.c:1123
 #3: ffff88801e7e10a8 (&sdp->sd_log_flush_lock){++++}-{3:3}, at: gfs2_log_flush+0xdb/0x2610 fs/gfs2/log.c:1035
 #4: ffff88801e7e0ed0 (&sdp->sd_log_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:364 [inline]
 #4: ffff88801e7e0ed0 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_log_lock fs/gfs2/log.h:32 [inline]
 #4: ffff88801e7e0ed0 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_flush_revokes+0x4e/0x80 fs/gfs2/log.c:806
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 PID: 4455 Comm: syz.1.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 ___might_sleep+0x47c/0x600 kernel/sched/core.c:9658
 gfs2_glock_wait+0x53/0x1c0 fs/gfs2/glock.c:1281
 gfs2_glock_nq_init fs/gfs2/glock.h:246 [inline]
 gfs2_freeze_lock+0x5a/0xc0 fs/gfs2/util.c:107
 signal_our_withdraw fs/gfs2/util.c:160 [inline]
 gfs2_withdraw+0x5bd/0x1460 fs/gfs2/util.c:343
 gfs2_ail1_empty+0x7c2/0x850 fs/gfs2/log.c:369
 gfs2_flush_revokes+0x58/0x80 fs/gfs2/log.c:807
 revoke_lo_before_commit+0x28/0x5f0 fs/gfs2/lops.c:872
 lops_before_commit fs/gfs2/lops.h:40 [inline]
 gfs2_log_flush+0xbff/0x2610 fs/gfs2/log.c:1094
 gfs2_write_inode+0x2a5/0x430 fs/gfs2/super.c:439
 write_inode fs/fs-writeback.c:1505 [inline]
 __writeback_single_inode+0x6c3/0xda0 fs/fs-writeback.c:1715
 writeback_single_inode+0x221/0x8b0 fs/fs-writeback.c:1770
 sync_inode_metadata+0xa8/0xf0 fs/fs-writeback.c:2831
 gfs2_fsync+0x1b2/0x340 fs/gfs2/file.c:765
 generic_write_sync+0xa2/0xf0 include/linux/fs.h:2989
 gfs2_file_write_iter+0xf64/0x11d0 fs/gfs2/file.c:1159
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x712/0xd00 fs/read_write.c:594
 ksys_write+0x14d/0x250 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe541c2dfc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe53fe74038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe541e85090 RCX: 00007fe541c2dfc9
RDX: 00000000ffffffd7 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007fe541cb0f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe541e85128 R14: 00007fe541e85090 R15: 00007ffd97f1ec58
 </TASK>

=============================
[ BUG: Invalid wait context ]
syzkaller #0 Tainted: G        W        
-----------------------------
syz.1.17/4455 is trying to lock:
ffff88801d8ca488 (&wq->mutex){+.+.}-{3:3}, at: flush_workqueue+0x165/0x1380 kernel/workqueue.c:2833
other info that might help us debug this:
context-{4:4}
5 locks held by syz.1.17/4455:
 #0: ffff888077a0eaf0 (
&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2bf/0x370 fs/file.c:1056
 #1: ffff888060754460 (sb_writers#15){.+.+}-{0:0}, at: vfs_write+0x28a/0xd00 fs/read_write.c:590
 #2: ffff88806282d2b0 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
 #2: ffff88806282d2b0 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: gfs2_file_write_iter+0x33b/0x11d0 fs/gfs2/file.c:1123
 #3: ffff88801e7e10a8 (&sdp->sd_log_flush_lock){++++}-{3:3}, at: gfs2_log_flush+0xdb/0x2610 fs/gfs2/log.c:1035
 #4: ffff88801e7e0ed0 (&sdp->sd_log_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:364 [inline]
 #4: ffff88801e7e0ed0 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_log_lock fs/gfs2/log.h:32 [inline]
 #4: ffff88801e7e0ed0 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_flush_revokes+0x4e/0x80 fs/gfs2/log.c:806
stack backtrace:
CPU: 1 PID: 4455 Comm: syz.1.17 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4664 [inline]
 check_wait_context kernel/locking/lockdep.c:4725 [inline]
 __lock_acquire+0x1be9/0x7c60 kernel/locking/lockdep.c:4962
 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
 __mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 flush_workqueue+0x165/0x1380 kernel/workqueue.c:2833
 gfs2_make_fs_ro+0xd1/0x5d0 fs/gfs2/super.c:529
 signal_our_withdraw fs/gfs2/util.c:166 [inline]
 gfs2_withdraw+0x5f9/0x1460 fs/gfs2/util.c:343
 gfs2_ail1_empty+0x7c2/0x850 fs/gfs2/log.c:369
 gfs2_flush_revokes+0x58/0x80 fs/gfs2/log.c:807
 revoke_lo_before_commit+0x28/0x5f0 fs/gfs2/lops.c:872
 lops_before_commit fs/gfs2/lops.h:40 [inline]
 gfs2_log_flush+0xbff/0x2610 fs/gfs2/log.c:1094
 gfs2_write_inode+0x2a5/0x430 fs/gfs2/super.c:439
 write_inode fs/fs-writeback.c:1505 [inline]
 __writeback_single_inode+0x6c3/0xda0 fs/fs-writeback.c:1715
 writeback_single_inode+0x221/0x8b0 fs/fs-writeback.c:1770
 sync_inode_metadata+0xa8/0xf0 fs/fs-writeback.c:2831
 gfs2_fsync+0x1b2/0x340 fs/gfs2/file.c:765
 generic_write_sync+0xa2/0xf0 include/linux/fs.h:2989
 gfs2_file_write_iter+0xf64/0x11d0 fs/gfs2/file.c:1159
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x712/0xd00 fs/read_write.c:594
 ksys_write+0x14d/0x250 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe541c2dfc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe53fe74038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe541e85090 RCX: 00007fe541c2dfc9
RDX: 00000000ffffffd7 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007fe541cb0f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe541e85128 R14: 00007fe541e85090 R15: 00007ffd97f1ec58
 </TASK>
BUG: sleeping function called from invalid context at kernel/sched/completion.c:101
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4455, name: syz.1.17
INFO: lockdep is turned off.
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 PID: 4455 Comm: syz.1.17 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 ___might_sleep+0x47c/0x600 kernel/sched/core.c:9658
 __wait_for_common kernel/sched/completion.c:101 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x19/0x60 kernel/sched/completion.c:138
 kthread_stop+0x16e/0x540 kernel/kthread.c:666
 gfs2_make_fs_ro+0x14c/0x5d0 fs/gfs2/super.c:533
 signal_our_withdraw fs/gfs2/util.c:166 [inline]
 gfs2_withdraw+0x5f9/0x1460 fs/gfs2/util.c:343
 gfs2_ail1_empty+0x7c2/0x850 fs/gfs2/log.c:369
 gfs2_flush_revokes+0x58/0x80 fs/gfs2/log.c:807
 revoke_lo_before_commit+0x28/0x5f0 fs/gfs2/lops.c:872
 lops_before_commit fs/gfs2/lops.h:40 [inline]
 gfs2_log_flush+0xbff/0x2610 fs/gfs2/log.c:1094
 gfs2_write_inode+0x2a5/0x430 fs/gfs2/super.c:439
 write_inode fs/fs-writeback.c:1505 [inline]
 __writeback_single_inode+0x6c3/0xda0 fs/fs-writeback.c:1715
 writeback_single_inode+0x221/0x8b0 fs/fs-writeback.c:1770
 sync_inode_metadata+0xa8/0xf0 fs/fs-writeback.c:2831
 gfs2_fsync+0x1b2/0x340 fs/gfs2/file.c:765
 generic_write_sync+0xa2/0xf0 include/linux/fs.h:2989
 gfs2_file_write_iter+0xf64/0x11d0 fs/gfs2/file.c:1159
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x712/0xd00 fs/read_write.c:594
 ksys_write+0x14d/0x250 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe541c2dfc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe53fe74038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe541e85090 RCX: 00007fe541c2dfc9
RDX: 00000000ffffffd7 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007fe541cb0f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe541e85128 R14: 00007fe541e85090 R15: 00007ffd97f1ec58
 </TASK>
BUG: scheduling while atomic: syz.1.17/4455/0x00000002
INFO: lockdep is turned off.
Modules linked in:
Preemption disabled at:
[<0000000000000000>] 0x0