INFO: task syz.0.174:6641 blocked for more than 144 seconds.
Not tainted 6.12.0-rc5-syzkaller-00181-g6c52d4da1c74 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.174 state:D stack:25752 pid:6641 tgid:6601 ppid:5846 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x18af/0x4bd0 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
xfs_ail_push_all_sync+0x236/0x310 fs/xfs/xfs_trans_ail.c:726
xfs_log_quiesce+0xdf/0x5b0 fs/xfs/xfs_log.c:1018
xfs_fs_freeze+0x8d/0x1a0 fs/xfs/xfs_super.c:936
freeze_super+0x81d/0xee0 fs/super.c:2107
fs_bdev_freeze+0x1ac/0x320 fs/super.c:1484
bdev_freeze+0xd8/0x220 block/bdev.c:257
xfs_fs_goingdown+0xa9/0x160 fs/xfs/xfs_fsops.c:444
xfs_file_ioctl+0x12e5/0x1a30 fs/xfs/xfs_ioctl.c:1343
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffaf277e719
RSP: 002b:00007ffaf3575038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffaf2936058 RCX: 00007ffaf277e719
RDX: 000000002001f980 RSI: 000000008004587d RDI: 0000000000000005
RBP: 00007ffaf27f132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007ffaf2936058 R15: 00007fff053ee548
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#0: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
1 lock held by khungtaskd/30:
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
3 locks held by kworker/u8:2/35:
#0: ffff888030285148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff888030285148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90000ab7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90000ab7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff8fcd3448 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196
3 locks held by kworker/1:1/46:
3 locks held by kworker/u8:9/3018:
2 locks held by getty/5601:
#0: ffff88814ceff0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1:
ffffc900032532f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5840:
#0: ffff8880122900e0 (&type->s_umount_key#65){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880122900e0 (&type->s_umount_key#65){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880122900e0 (&type->s_umount_key#65){+.+.}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffff8880695bd800 (&sbi->umount_mutex){+.+.}-{3:3}, at: f2fs_put_super+0xca/0x1150 fs/f2fs/super.c:1589
3 locks held by syz-executor/5856:
#0: ffff88807b22c0e0
(&type->s_umount_key#71){+.+.}-{3:3}
, at: __super_lock fs/super.c:56 [inline]
, at: __super_lock_excl fs/super.c:71 [inline]
, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8eec44a8 (uuid_mutex){+.+.}-{3:3}, at: btrfs_close_devices+0xc0/0x5c0 fs/btrfs/volumes.c:1160
#2: ffffffff8e9f92e8 (lock#3){+.+.}-{3:3}, at: __lru_add_drain_all+0x66/0x560 mm/swap.c:843
3 locks held by kworker/1:6/5926:
5 locks held by syz.0.174/6641:
#0: ffff888148c82430 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: bdev_freeze+0x2a/0x220 block/bdev.c:248
#1: ffff88814cc80420 (sb_writers#16){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline]
#1: ffff88814cc80420 (sb_writers#16){++++}-{0:0}, at: freeze_super+0x4e9/0xee0 fs/super.c:2085
#2: ffff88814cc800e0 (&type->s_umount_key#60){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#2: ffff88814cc800e0 (&type->s_umount_key#60){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#2: ffff88814cc800e0 (&type->s_umount_key#60){++++}-{3:3}, at: freeze_super+0x4f1/0xee0 fs/super.c:2086
#3: ffff88814cc80518 (sb_pagefaults#2){+.+.}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline]
#3: ffff88814cc80518 (sb_pagefaults#2){+.+.}-{0:0}, at: freeze_super+0x519/0xee0 fs/super.c:2090
#4: ffff88814cc80610 (sb_internal#3){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline]
#4: ffff88814cc80610 (sb_internal#3){++++}-{0:0}, at: freeze_super+0x7cc/0xee0 fs/super.c:2104
1 lock held by syz-executor/7811:
#0: ffffffff8fcd3448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcd3448 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
2 locks held by kworker/u8:13/7833:
1 lock held by syz-executor/8072:
1 lock held by syz.6.604/8426:
2 locks held by syz.2.602/8434:
#0: ffffffff8e7f2848 (sched_core_mutex){+.+.}-{3:3}, at: sched_core_get+0x51/0x180 kernel/sched/core.c:454
#1: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#1: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
1 lock held by rm/8436:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc5-syzkaller-00181-g6c52d4da1c74 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8426 Comm: syz.6.604 Not tainted 6.12.0-rc5-syzkaller-00181-g6c52d4da1c74 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:check_preemption_disabled+0x7/0x120 lib/smp_processor_id.c:13
Code: c6 00 04 61 8c eb 1c 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 41 54 53 <48> 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65 8b 1d 5c
RSP: 0018:ffffc900044878f8 EFLAGS: 00000283
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81706f10
RDX: 0000000000000000 RSI: ffffffff8c610400 RDI: ffffffff8c6103c0
RBP: ffffc90004487a70 R08: ffffffff901d042f R09: 1ffffffff203a085
R10: dffffc0000000000 R11: fffffbfff203a086 R12: 1ffff92000890f34
R13: ffffffff81e4abfa R14: 1ffff92000890f80 R15: dffffc0000000000
FS: 00007fd201dde6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005561de3a7131 CR3: 00000000687de000 CR4: 0000000000350ef0
Call Trace:
rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:737
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0xbf/0xa30 kernel/locking/lockdep.c:5836
do_recvmmsg+0x5cb/0xad0 net/socket.c:2968
__sys_recvmmsg net/socket.c:3041 [inline]
__do_sys_recvmmsg net/socket.c:3064 [inline]
__se_sys_recvmmsg net/socket.c:3057 [inline]
__x64_sys_recvmmsg+0x199/0x250 net/socket.c:3057
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd20237e719
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:00007fd201dde038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fd202536058 RCX: 00007fd20237e719
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fd2023f132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd202536058 R15: 00007ffc66487a48