INFO: task kworker/u8:3:52 blocked for more than 143 seconds.
Not tainted 6.11.0-rc2-syzkaller-00194-gafdab700f65e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:3 state:D stack:20184 pid:52 tgid:52 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:3)
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common kernel/locking/rwsem.c:1306 [inline]
__down_write kernel/locking/rwsem.c:1315 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1580
f2fs_down_write fs/f2fs/f2fs.h:2175 [inline]
f2fs_issue_checkpoint+0x2d6/0x4e0 fs/f2fs/checkpoint.c:1872
f2fs_balance_fs_bg+0x534/0x970 fs/f2fs/segment.c:520
f2fs_write_node_pages+0x147/0x6d0 fs/f2fs/node.c:2136
do_writepages+0x35d/0x870 mm/page-writeback.c:2683
__writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1651
writeback_sb_inodes+0x99c/0x1380 fs/fs-writeback.c:1947
__writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2018
wb_writeback+0x495/0xd40 fs/fs-writeback.c:2129
wb_check_start_all fs/fs-writeback.c:2255 [inline]
wb_do_writeback fs/fs-writeback.c:2281 [inline]
wb_workfn+0x980/0x1090 fs/fs-writeback.c:2314
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INFO: task syz.2.334:8380 blocked for more than 144 seconds.
Not tainted 6.11.0-rc2-syzkaller-00194-gafdab700f65e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.334 state:D stack:27424 pid:8380 tgid:8379 ppid:7639 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:216
sync_inodes_sb+0x293/0xb20 fs/fs-writeback.c:2792
iterate_supers+0xc6/0x190 fs/super.c:934
ksys_sync+0xbd/0x1c0 fs/sync.c:102
__do_sys_sync+0xe/0x20 fs/sync.c:113
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: 0033:0x7fa64a3779f9
RSP: 002b:00007fa64b229038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fa64a505f80 RCX: 00007fa64a3779f9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fa64a3e58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa64a505f80 R15: 00007ffe8aa238a8
Showing all locks held in the system:
3 locks held by kworker/0:0/8:
2 locks held by kworker/u8:0/11:
1 lock held by khungtaskd/30:
#0: ffffffff8e7382a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e7382a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e7382a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
4 locks held by kworker/u8:3/52:
#0: ffff888017e96948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff888017e96948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc90000bc7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc90000bc7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:562
#3: ffff88805d2112a0 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2175 [inline]
#3: ffff88805d2112a0 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_issue_checkpoint+0x2d6/0x4e0 fs/f2fs/checkpoint.c:1872
2 locks held by dhcpcd/4883:
#0: ffff888047d49678 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: netlink_dump+0xcb/0xd80 net/netlink/af_netlink.c:2271
#1: ffffffff8fa6f748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fa6f748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_dumpit+0x99/0x200 net/core/rtnetlink.c:6506
2 locks held by getty/4975:
#0: ffff88802af610a0 (&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
5 locks held by syz.3.292/8045:
2 locks held by syz.2.334/8380:
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
2 locks held by syz.0.299/8499:
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
2 locks held by syz.0.299/8505:
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
2 locks held by syz.0.299/8506:
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
2 locks held by syz.0.299/8507:
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
2 locks held by syz.0.299/8508:
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
2 locks held by syz.0.299/8509:
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
2 locks held by syz.0.299/8510:
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
2 locks held by syz.2.337/8667:
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
2 locks held by syz.3.375/8734:
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806737e0e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880205be7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
1 lock held by syz-executor/9297:
#0: ffff888053d0d838 (&type->i_mutex_dir_key#29){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:809 [inline]
#0: ffff888053d0d838 (&type->i_mutex_dir_key#29){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1734
3 locks held by syz-executor/9645:
#0: ffffffff8fa6f748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fa6f748 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644
#1: ffff88802bc01428 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_open+0x22d/0x420 drivers/net/wireguard/device.c:50
#2: ffffffff8e73d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline]
#2: ffffffff8e73d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:958
1 lock held by syz-executor/9862:
#0: ffffffff8fa6f748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fa6f748 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644
7 locks held by syz-executor/10025:
#0: ffff88801e4f8420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline]
#0: ffff88801e4f8420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
#1: ffff88805c0d4088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325
#2: ffff888022ff75a8 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326
#3: ffffffff8f30c588 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
#4: ffff888057a0d0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#4: ffff888057a0d0e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1094 [inline]
#4: ffff888057a0d0e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1292
#5: ffff888060745250 (&devlink->lock_key#32){+.+.}-{3:3}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1672
#6: ffffffff8fa6f748 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x71/0x5c0 drivers/net/netdevsim/netdev.c:773
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc2-syzkaller-00194-gafdab700f65e #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+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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: 2924 Comm: kworker/u8:9 Not tainted 6.11.0-rc2-syzkaller-00194-gafdab700f65e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:hlock_class kernel/locking/lockdep.c:227 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4797 [inline]
RIP: 0010:__lock_acquire+0x898/0x2040 kernel/locking/lockdep.c:5092
Code: 8b 5d 00 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 00 e8 4e 93 be 08 00 00 00 e8 60 d0 87 00 48 0f a3 1d 28 1e df 11 <73> 1a 48 69 c3 c8 00 00 00 48 8d 98 00 47 1d 93 48 ba 00 00 00 00
RSP: 0018:ffffc90009817890 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 00000000000006cb RCX: ffffffff816fc9d0
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff934ee8d8
RBP: 00000000ffffffff R08: ffffffff934ee8df R09: 1ffffffff269dd1b
R10: dffffc0000000000 R11: fffffbfff269dd1c R12: 0000000000000000
R13: ffff88802ba7a900 R14: 0000000000000000 R15: ffff88802ba7a900
FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560fd7efa178 CR3: 00000000229a4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
batadv_nc_process_nc_paths+0xd6/0x3a0 net/batman-adv/network-coding.c:687
batadv_nc_worker+0x52c/0x610 net/batman-adv/network-coding.c:735
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244