INFO: task syz-executor:24032 blocked for more than 146 seconds.
Not tainted 6.11.0-rc2-syzkaller-00302-gcb2e5ee8e7a0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20992 pid:24032 tgid:24032 ppid:24031 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
xfs_ail_push_all_sync+0x236/0x310 fs/xfs/xfs_trans_ail.c:721
xfs_unmount_flush_inodes+0x93/0xc0 fs/xfs/xfs_mount.c:600
xfs_unmountfs+0x74/0x230 fs/xfs/xfs_mount.c:1091
xfs_fs_put_super+0x65/0x150 fs/xfs/xfs_super.c:1145
generic_shutdown_super+0x138/0x2d0 fs/super.c:642
kill_block_super+0x44/0x90 fs/super.c:1696
xfs_kill_sb+0x15/0x50 fs/xfs/xfs_super.c:2045
deactivate_locked_super+0xc6/0x130 fs/super.c:473
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
task_work_run+0x251/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdef6b78d27
RSP: 002b:00007ffce05b7a38 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fdef6b78d27
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffce05b7af0
RBP: 00007ffce05b7af0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffce05b8b70
R13: 00007fdef6be578c R14: 00000000001e63eb R15: 00007ffce05b8bb0
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline]
#0: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958
3 locks held by kworker/u8:1/12:
1 lock held by khungtaskd/30:
#0: ffffffff8e9382a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e9382a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e9382a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
2 locks held by kworker/u8:4/62:
3 locks held by kworker/u8:5/973:
3 locks held by kworker/u8:7/1114:
3 locks held by kworker/u8:10/2951:
2 locks held by getty/4984:
#0: ffff88802b31a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by kworker/u8:13/5608:
3 locks held by kworker/u8:14/5609:
3 locks held by kworker/0:2/10199:
3 locks held by kworker/u8:2/13767:
3 locks held by kworker/u8:3/13768:
3 locks held by kworker/u8:8/13769:
3 locks held by kworker/1:1/17117:
4 locks held by kworker/0:1/21053:
#0: ffff888015879948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff888015879948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc900032afd00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc900032afd00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffffffff8fc82348 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x99/0xfd0 net/wireless/reg.c:2480
#3: ffff88806b180768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:6014 [inline]
#3: ffff88806b180768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: reg_leave_invalid_chans net/wireless/reg.c:2468 [inline]
#3: ffff88806b180768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: reg_check_chans_work+0x164/0xfd0 net/wireless/reg.c:2483
3 locks held by kworker/u8:6/21054:
5 locks held by kworker/u8:9/21140:
2 locks held by kworker/0:12/21416:
5 locks held by kworker/u8:11/21447:
3 locks held by kworker/u8:12/21448:
1 lock held by syz-executor/24032:
#0: ffff88805b4e20e0 (&type->s_umount_key#62){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88805b4e20e0 (&type->s_umount_key#62){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88805b4e20e0 (&type->s_umount_key#62){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz-executor/24039:
1 lock held by syz-executor/24062:
#0: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline]
#0: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958
1 lock held by syz-executor/24064:
6 locks held by syz.3.4093/24103:
1 lock held by syz.5.4122/24202:
1 lock held by syz-executor/24234:
3 locks held by kworker/u8:16/24245:
#0: ffff88802aaa7148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff88802aaa7148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc90003537d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc90003537d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffffffff8fc82348 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4734
2 locks held by syz-executor/24247:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc2-syzkaller-00302-gcb2e5ee8e7a0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
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+0xfee/0x1030 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 17117 Comm: kworker/1:1 Not tainted 6.11.0-rc2-syzkaller-00302-gcb2e5ee8e7a0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: events kfree_rcu_work
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:154 [inline]
RIP: 0010:lock_release+0x645/0xa30 kernel/locking/lockdep.c:5783
Code: 24 90 00 00 00 00 00 00 00 9c 8f 84 24 90 00 00 00 42 80 3c 3b 00 74 08 4c 89 f7 e8 05 d6 8a 00 f6 84 24 91 00 00 00 02 75 77 <41> f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 4b c7 04
RSP: 0018:ffffc900044c7760 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff92000898efe RCX: ffffc900044c7703
RDX: 0000000000000002 RSI: ffffffff8c0ae6e0 RDI: ffffffff8c606480
RBP: ffffc900044c7890 R08: ffffffff9017ce6f R09: 1ffffffff202f9cd
R10: dffffc0000000000 R11: fffffbfff202f9ce R12: 1ffff92000898ef8
R13: 0000000000000046 R14: ffffc900044c77f0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff335306018 CR3: 000000002e664000 CR4: 0000000000350ef0
Call Trace:
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194
debug_object_active_state+0x239/0x360 lib/debugobjects.c:946
debug_rcu_head_unqueue kernel/rcu/rcu.h:236 [inline]
debug_rcu_bhead_unqueue kernel/rcu/tree.c:3321 [inline]
kvfree_rcu_bulk+0xc5/0x4e0 kernel/rcu/tree.c:3398
kfree_rcu_work+0x44b/0x500 kernel/rcu/tree.c:3484
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
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