INFO: task kworker/u4:6:3770 blocked for more than 143 seconds.
Not tainted 6.1.15-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:6 state:D stack:20832 pid:3770 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:3)
Call Trace:
context_switch kernel/sched/core.c:5238 [inline]
__schedule+0x1376/0x4360 kernel/sched/core.c:6551
schedule+0xbf/0x180 kernel/sched/core.c:6627
rwsem_down_write_slowpath+0xfc7/0x1490 kernel/locking/rwsem.c:1190
f2fs_down_write fs/f2fs/f2fs.h:2205 [inline]
f2fs_balance_fs+0x4fb/0x6c0 fs/f2fs/segment.c:409
f2fs_write_inode+0x4c3/0x540 fs/f2fs/inode.c:753
write_inode fs/fs-writeback.c:1440 [inline]
__writeback_single_inode+0x7f9/0x1540 fs/fs-writeback.c:1652
writeback_sb_inodes+0xc43/0x1b70 fs/fs-writeback.c:1878
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1949
wb_writeback+0x4fd/0x1020 fs/fs-writeback.c:2054
wb_check_old_data_flush fs/fs-writeback.c:2154 [inline]
wb_do_writeback fs/fs-writeback.c:2207 [inline]
wb_workfn+0xca8/0x10e0 fs/fs-writeback.c:2235
process_one_work+0x8ee/0x1350 kernel/workqueue.c:2289
worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436
kthread+0x268/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
INFO: task kworker/u4:8:3889 blocked for more than 144 seconds.
Not tainted 6.1.15-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:8 state:D stack:23352 pid:3889 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:4)
Call Trace:
context_switch kernel/sched/core.c:5238 [inline]
__schedule+0x1376/0x4360 kernel/sched/core.c:6551
schedule+0xbf/0x180 kernel/sched/core.c:6627
rwsem_down_write_slowpath+0xfc7/0x1490 kernel/locking/rwsem.c:1190
f2fs_down_write fs/f2fs/f2fs.h:2205 [inline]
f2fs_balance_fs+0x4fb/0x6c0 fs/f2fs/segment.c:409
f2fs_write_inode+0x4c3/0x540 fs/f2fs/inode.c:753
write_inode fs/fs-writeback.c:1440 [inline]
__writeback_single_inode+0x7f9/0x1540 fs/fs-writeback.c:1652
writeback_sb_inodes+0xc43/0x1b70 fs/fs-writeback.c:1878
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1949
wb_writeback+0x4fd/0x1020 fs/fs-writeback.c:2054
wb_check_old_data_flush fs/fs-writeback.c:2154 [inline]
wb_do_writeback fs/fs-writeback.c:2207 [inline]
wb_workfn+0xca8/0x10e0 fs/fs-writeback.c:2235
process_one_work+0x8ee/0x1350 kernel/workqueue.c:2289
worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436
kthread+0x268/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
INFO: task kworker/u4:11:4056 blocked for more than 146 seconds.
Not tainted 6.1.15-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:11 state:D stack:24152 pid:4056 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:1)
Call Trace:
context_switch kernel/sched/core.c:5238 [inline]
__schedule+0x1376/0x4360 kernel/sched/core.c:6551
schedule+0xbf/0x180 kernel/sched/core.c:6627
rwsem_down_write_slowpath+0xfc7/0x1490 kernel/locking/rwsem.c:1190
f2fs_down_write fs/f2fs/f2fs.h:2205 [inline]
f2fs_balance_fs+0x4fb/0x6c0 fs/f2fs/segment.c:409
f2fs_write_inode+0x4c3/0x540 fs/f2fs/inode.c:753
write_inode fs/fs-writeback.c:1440 [inline]
__writeback_single_inode+0x7f9/0x1540 fs/fs-writeback.c:1652
writeback_sb_inodes+0xc43/0x1b70 fs/fs-writeback.c:1878
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1949
wb_writeback+0x4fd/0x1020 fs/fs-writeback.c:2054
wb_check_old_data_flush fs/fs-writeback.c:2154 [inline]
wb_do_writeback fs/fs-writeback.c:2207 [inline]
wb_workfn+0xca8/0x10e0 fs/fs-writeback.c:2235
process_one_work+0x8ee/0x1350 kernel/workqueue.c:2289
worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436
kthread+0x268/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Showing all locks held in the system:
3 locks held by kworker/u4:1/11:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cf267f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cf26ff0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8cf26620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3313:
#0: ffff888027782098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2177
4 locks held by kworker/u4:6/3770:
#0: ffff888017bcd938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x77b/0x1350
#1: ffffc9000443fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7be/0x1350 kernel/workqueue.c:2264
#2: ffff888077e200e0 (&type->s_umount_key#57){.+.+}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:415
#3: ffff8880761bd140 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2205 [inline]
#3: ffff8880761bd140 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4fb/0x6c0 fs/f2fs/segment.c:409
4 locks held by kworker/u4:8/3889:
#0: ffff888017bcd938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x77b/0x1350
#1: ffffc900047e7d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7be/0x1350 kernel/workqueue.c:2264
#2: ffff888040aee0e0 (&type->s_umount_key#57){.+.+}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:415
#3: ffff88807501d140 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2205 [inline]
#3: ffff88807501d140 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4fb/0x6c0 fs/f2fs/segment.c:409
2 locks held by kworker/u4:10/3983:
4 locks held by kworker/u4:11/4056:
#0: ffff888017bcd938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x77b/0x1350
#1: ffffc9000510fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7be/0x1350 kernel/workqueue.c:2264
#2: ffff8880741de0e0 (&type->s_umount_key#57){.+.+}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:415
#3: ffff888076ce1140 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2205 [inline]
#3: ffff888076ce1140 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4fb/0x6c0 fs/f2fs/segment.c:409
3 locks held by kworker/1:18/6849:
#0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77b/0x1350
#1: ffffc900033efd20 (fqdir_free_work){+.+.}-{0:0}, at: process_one_work+0x7be/0x1350 kernel/workqueue.c:2264
#2: ffffffff8cf2ba40 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x5f0 kernel/rcu/tree.c:3953
3 locks held by kworker/1:19/6850:
#0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77b/0x1350
#1: ffffc900033ffd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7be/0x1350 kernel/workqueue.c:2264
#2: ffffffff8cf2bb78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#2: ffffffff8cf2bb78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a7/0x890 kernel/rcu/tree_exp.h:946
2 locks held by syz-executor.3/8132:
2 locks held by syz-executor.1/8168:
2 locks held by syz-executor.4/8169:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.15-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf68/0xfb0 kernel/hung_task.c:377
kthread+0x268/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3983 Comm: kworker/u4:10 Not tainted 6.1.15-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: bat_events batadv_purge_orig
RIP: 0010:cpumask_check include/linux/cpumask.h:117 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:444 [inline]
RIP: 0010:cpu_online include/linux/cpumask.h:1030 [inline]
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0x88/0xa90 kernel/locking/lockdep.c:5679
Code: 03 48 b8 f1 f1 f1 f1 04 f2 00 f2 4b 89 04 3c 48 b8 f2 f2 00 f3 f3 f3 f3 f3 4b 89 44 3c 08 0f 1f 44 00 00 65 8b 1d 10 d5 97 7e <48> c7 c0 78 80 52 8e 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 c3 06
RSP: 0018:ffffc9000488f980 EFLAGS: 00000a06
RAX: f3f3f3f3f300f2f2 RBX: 0000000000000001 RCX: ffff88807de3ba80
RDX: 0000000000000000 RSI: ffffffff8a53ade3 RDI: ffff88804a7d7118
RBP: ffffc9000488fab8 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 1ffff92000911f3c
R13: ffffffff8a53ade3 R14: ffffffff8a53ade3 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055cf985a9000 CR3: 000000004d495000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:165 [inline]
_raw_spin_unlock_bh+0x17/0x30 kernel/locking/spinlock.c:210
spin_unlock_bh include/linux/spinlock.h:395 [inline]
batadv_purge_orig_ref+0x1463/0x1550 net/batman-adv/originator.c:1259
batadv_purge_orig+0x15/0x60 net/batman-adv/originator.c:1272
process_one_work+0x8ee/0x1350 kernel/workqueue.c:2289
worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436
kthread+0x268/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306