gfs2: fsid=syz:syz.0: first mount done, others may mount
attempt to access beyond end of device
loop0: rw=1, want=16778992, 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/glock.c:1281
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5110, name: syz.0.16
5 locks held by syz.0.16/5110:
 #0: ffff88807a7c2460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:377
 #1: ffff88805d938150 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
 #1: ffff88805d938150 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline]
 #1: ffff88805d938150 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x7f3/0x2f30 fs/namei.c:3739
 #2: ffff88807a7c2650 (sb_internal#2){.+.+}-{0:0}, at: gfs2_trans_begin+0x6b/0xe0 fs/gfs2/trans.c:118
 #3: ffff888022bad0a8 (&sdp->sd_log_flush_lock){++++}-{3:3}, at: gfs2_log_flush+0xdb/0x2610 fs/gfs2/log.c:1035
 #4: ffff888022baced0 (&sdp->sd_log_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:363 [inline]
 #4: ffff888022baced0 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_log_lock fs/gfs2/log.h:32 [inline]
 #4: ffff888022baced0 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_flush_revokes+0x4e/0x80 fs/gfs2/log.c:806
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 PID: 5110 Comm: syz.0.16 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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_trans_end+0x377/0x570 fs/gfs2/trans.c:158
 alloc_dinode+0x3b1/0x4f0 fs/gfs2/inode.c:419
 gfs2_create_inode+0xc22/0x13b0 fs/gfs2/inode.c:721
 gfs2_atomic_open+0xce/0x210 fs/gfs2/inode.c:1296
 atomic_open fs/namei.c:3325 [inline]
 lookup_open fs/namei.c:3433 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0xe6d/0x2f30 fs/namei.c:3739
 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769
 do_sys_openat2+0x142/0x4a0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1280
 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: 0033:0x7fb4aaaca169
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:00007fb4a9d3b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb4aace2fa0 RCX: 00007fb4aaaca169
RDX: 0000000000000042 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007fb4aab4b2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb4aace2fa0 R15: 00007fff6c1590b8
 </TASK>

=============================
[ BUG: Invalid wait context ]
syzkaller #0 Tainted: G        W        
-----------------------------
syz.0.16/5110 is trying to lock:
ffff88801dae5888 (&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.0.16/5110:
 #0: ffff88807a7c2460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:377
 #1: ffff88805d938150 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
 #1: ffff88805d938150 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline]
 #1: ffff88805d938150 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x7f3/0x2f30 fs/namei.c:3739
 #2: ffff88807a7c2650 (sb_internal#2){.+.+}-{0:0}, at: gfs2_trans_begin+0x6b/0xe0 fs/gfs2/trans.c:118
 #3: ffff888022bad0a8 (&sdp->sd_log_flush_lock){++++}-{3:3}, at: gfs2_log_flush+0xdb/0x2610 fs/gfs2/log.c:1035
 #4: ffff888022baced0 (&sdp->sd_log_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:363 [inline]
 #4: ffff888022baced0 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_log_lock fs/gfs2/log.h:32 [inline]
 #4: ffff888022baced0 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_flush_revokes+0x4e/0x80 fs/gfs2/log.c:806
stack backtrace:
CPU: 0 PID: 5110 Comm: syz.0.16 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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_trans_end+0x377/0x570 fs/gfs2/trans.c:158
 alloc_dinode+0x3b1/0x4f0 fs/gfs2/inode.c:419
 gfs2_create_inode+0xc22/0x13b0 fs/gfs2/inode.c:721
 gfs2_atomic_open+0xce/0x210 fs/gfs2/inode.c:1296
 atomic_open fs/namei.c:3325 [inline]
 lookup_open fs/namei.c:3433 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0xe6d/0x2f30 fs/namei.c:3739
 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769
 do_sys_openat2+0x142/0x4a0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1280
 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: 0033:0x7fb4aaaca169
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:00007fb4a9d3b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb4aace2fa0 RCX: 00007fb4aaaca169
RDX: 0000000000000042 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007fb4aab4b2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb4aace2fa0 R15: 00007fff6c1590b8
 </TASK>
BUG: sleeping function called from invalid context at kernel/sched/completion.c:101
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5110, name: syz.0.16
INFO: lockdep is turned off.
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 PID: 5110 Comm: syz.0.16 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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_trans_end+0x377/0x570 fs/gfs2/trans.c:158
 alloc_dinode+0x3b1/0x4f0 fs/gfs2/inode.c:419
 gfs2_create_inode+0xc22/0x13b0 fs/gfs2/inode.c:721
 gfs2_atomic_open+0xce/0x210 fs/gfs2/inode.c:1296
 atomic_open fs/namei.c:3325 [inline]
 lookup_open fs/namei.c:3433 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0xe6d/0x2f30 fs/namei.c:3739
 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769
 do_sys_openat2+0x142/0x4a0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1280
 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: 0033:0x7fb4aaaca169
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:00007fb4a9d3b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb4aace2fa0 RCX: 00007fb4aaaca169
RDX: 0000000000000042 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007fb4aab4b2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb4aace2fa0 R15: 00007fff6c1590b8
 </TASK>
BUG: scheduling while atomic: syz.0.16/5110/0x00000002
INFO: lockdep is turned off.
Modules linked in:
Preemption disabled at:
[<0000000000000000>] 0x0