INFO: task kworker/0:5:5892 blocked for more than 143 seconds.
Not tainted 6.15.0-rc4-syzkaller-00021-gca91b9500108 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:5 state:D stack:21224 pid:5892 tgid:5892 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: gfs2_recovery gfs2_recover_func
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x16e2/0x4cd0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6860
io_schedule+0x81/0xe0 kernel/sched/core.c:7742
folio_wait_bit_common+0x6b0/0xb90 mm/filemap.c:1317
folio_wait_locked include/linux/pagemap.h:1212 [inline]
gfs2_jhead_process_page+0x16e/0x610 fs/gfs2/lops.c:470
gfs2_find_jhead+0xd20/0xea0 fs/gfs2/lops.c:587
gfs2_recover_func+0x691/0x1c70 fs/gfs2/recovery.c:460
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xade/0x17a0 kernel/workqueue.c:3319
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4e/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz.8.1032:10195 blocked for more than 144 seconds.
Not tainted 6.15.0-rc4-syzkaller-00021-gca91b9500108 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.1032 state:D stack:25128 pid:10195 tgid:10194 ppid:7533 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x16e2/0x4cd0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6860
bit_wait+0x11/0xd0 kernel/sched/wait_bit.c:237
__wait_on_bit+0xb9/0x310 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x123/0x170 kernel/sched/wait_bit.c:64
wait_on_bit include/linux/wait_bit.h:77 [inline]
gfs2_recover_journal+0xda/0x140 fs/gfs2/recovery.c:577
init_journal+0x17cc/0x2260 fs/gfs2/ops_fstype.c:811
init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:864
gfs2_fill_super+0x18a3/0x2050 fs/gfs2/ops_fstype.c:1249
get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1636
gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1330
vfs_get_tree+0x92/0x2b0 fs/super.c:1759
do_new_mount+0x24a/0xa40 fs/namespace.c:3884
do_mount fs/namespace.c:4224 [inline]
__do_sys_mount fs/namespace.c:4435 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4412
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffb15f9010a
RSP: 002b:00007ffb16e60e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffb16e60ef0 RCX: 00007ffb15f9010a
RDX: 0000200000037f40 RSI: 0000200000037f80 RDI: 00007ffb16e60eb0
RBP: 0000200000037f40 R08: 00007ffb16e60ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000037f80
R13: 00007ffb16e60eb0 R14: 0000000000038066 R15: 00002000000000c0
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8df41338 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:304 [inline]
#0: ffffffff8df41338 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f4/0x730 kernel/rcu/tree_exp.h:998
1 lock held by khungtaskd/31:
#0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6764
2 locks held by kworker/u8:5/967:
2 locks held by getty/5584:
#0: ffff8880302bf0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036d32f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
2 locks held by kworker/0:5/5892:
#0: ffff88801e38d548 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801e38d548 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: process_scheduled_works+0x9b1/0x17a0 kernel/workqueue.c:3319
#1: ffffc90003877c60 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90003877c60 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319
1 lock held by syz.8.1032/10195:
#0: ffff88807dd0e0e0 (&type->s_umount_key#125/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970 fs/super.c:344
1 lock held by syz.0.1444/11757:
#0: ffff8880b8939b58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc4-syzkaller-00021-gca91b9500108 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:437
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4e/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5829 Comm: syz-executor Not tainted 6.15.0-rc4-syzkaller-00021-gca91b9500108 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
RIP: 0010:page_ref_count include/linux/page_ref.h:67 [inline]
RIP: 0010:folio_ref_count include/linux/page_ref.h:89 [inline]
RIP: 0010:page_count include/linux/page_ref.h:94 [inline]
RIP: 0010:page_is_buddy mm/internal.h:635 [inline]
RIP: 0010:find_buddy_page_pfn mm/internal.h:687 [inline]
RIP: 0010:buddy_merge_likely mm/page_alloc.c:768 [inline]
RIP: 0010:__free_one_page+0x690/0xba0 mm/page_alloc.c:875
Code: 00 4d 89 e7 49 83 c7 34 4c 89 ff be 04 00 00 00 e8 e5 11 0d 00 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 0f 85 8b 03 00 00 41 83 3f 00 74 15 4c 89 e7 48 c7 c6 a0 8a
RSP: 0018:ffffc900042d7998 EFLAGS: 00000013
RAX: 0000000000000000 RBX: 0000000000000002 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea0001334434
RBP: 0000000000000003 R08: ffffea0001334437 R09: 1ffffd4000266886
R10: dffffc0000000000 R11: fffff94000266887 R12: ffffea0001334400
R13: 1ffffd4000266880 R14: ffffea0001334600 R15: ffffea0001334434
FS: 00005555841af500(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f732e780178 CR3: 000000005e9af000 CR4: 0000000000350ef0
Call Trace:
free_pcppages_bulk+0x37f/0x570 mm/page_alloc.c:1355
free_frozen_page_commit+0x4ba/0xff0 mm/page_alloc.c:2699
__free_frozen_pages+0x688/0xcd0 mm/page_alloc.c:2753
discard_slab mm/slub.c:2730 [inline]
__put_partials+0x161/0x1c0 mm/slub.c:3199
put_cpu_partial+0x17c/0x250 mm/slub.c:3274
__slab_free+0x2f7/0x400 mm/slub.c:4526
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4161 [inline]
slab_alloc_node mm/slub.c:4210 [inline]
kmem_cache_alloc_lru_noprof+0x1c6/0x3d0 mm/slub.c:4229
sock_alloc_inode+0x28/0xc0 net/socket.c:309
alloc_inode+0x6a/0x1b0 fs/inode.c:346
new_inode_pseudo include/linux/fs.h:3309 [inline]
sock_alloc net/socket.c:622 [inline]
__sock_create+0x12d/0x9f0 net/socket.c:1505
sock_create net/socket.c:1599 [inline]
__sys_socket_create net/socket.c:1636 [inline]
__sys_socket+0xd7/0x1b0 net/socket.c:1683
__do_sys_socket net/socket.c:1697 [inline]
__se_sys_socket net/socket.c:1695 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1695
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f319f590887
Code: f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 29 00 00 00 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:00007fffe8db00a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f319f77d2e0 RCX: 00007f319f590887
RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 00007fffe8db07cc R08: 0000000000000000 R09: 00007fffe8db04d7
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000102
R13: 00000000000927c0 R14: 0000000000000000 R15: 00007fffe8db0820