INFO: task syz.1.357:8870 blocked for more than 143 seconds.
Not tainted 6.12.0-rc2-syzkaller-00050-g5b7c893ed5ed #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.357 state:D stack:23264 pid:8870 tgid:8869 ppid:8445 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
percpu_rwsem_wait+0x3c2/0x450 kernel/locking/percpu-rwsem.c:162
__percpu_down_read+0xee/0x130 kernel/locking/percpu-rwsem.c:177
percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
__sb_start_write include/linux/fs.h:1716 [inline]
sb_start_write+0x184/0x1c0 include/linux/fs.h:1852
mnt_want_write+0x3f/0x90 fs/namespace.c:515
filename_create+0x184/0x540 fs/namei.c:4019
do_symlinkat+0xf9/0x3a0 fs/namei.c:4634
__do_sys_symlinkat fs/namei.c:4657 [inline]
__se_sys_symlinkat fs/namei.c:4654 [inline]
__x64_sys_symlinkat+0x95/0xb0 fs/namei.c:4654
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: 0033:0x7f3769b7dff9
RSP: 002b:00007f376a913038 EFLAGS: 00000246 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007f3769d35f80 RCX: 00007f3769b7dff9
RDX: 0000000020000000 RSI: ffffffffffffff9c RDI: 00000000200001c0
RBP: 00007f3769bf0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3769d35f80 R15: 00007fff11a104c8
INFO: task syz.1.357:8898 blocked for more than 143 seconds.
Not tainted 6.12.0-rc2-syzkaller-00050-g5b7c893ed5ed #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.357 state:D stack:24896 pid:8898 tgid:8869 ppid:8445 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
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+0x81b/0xee0 fs/super.c:2107
fs_bdev_freeze+0x1ac/0x320 fs/super.c:1484
bdev_freeze+0xd6/0x220 block/bdev.c:257
xfs_fs_goingdown+0xa9/0x160 fs/xfs/xfs_fsops.c:446
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+0xf9/0x170 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: 0033:0x7f3769b7dff9
RSP: 002b:00007f376a8f2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3769d36058 RCX: 00007f3769b7dff9
RDX: 0000000020000080 RSI: 000000008004587d RDI: 0000000000000006
RBP: 00007f3769bf0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3769d36058 R15: 00007fff11a104c8
Showing all locks held in the system:
4 locks held by kworker/u8:0/11:
3 locks held by kworker/u8:2/29:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90000a57d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90000a57d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff8fcbf8c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
1 lock held by khungtaskd/31:
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by kworker/u8:7/1122:
1 lock held by dhcpcd/4891:
#0: ffffffff8fcbf8c8 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x2ce/0x1aa0 net/ipv4/devinet.c:1097
2 locks held by getty/4979:
#0: ffff88814bd130a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz.1.357/8870:
#0: ffff888011f7e420 (sb_writers#18){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
5 locks held by syz.1.357/8898:
#0: ffff888148cfddb0 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: bdev_freeze+0x2a/0x220 block/bdev.c:248
#1: ffff888011f7e420 (sb_writers#18){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline]
#1: ffff888011f7e420 (sb_writers#18){++++}-{0:0}, at: freeze_super+0x4e9/0xee0 fs/super.c:2085
#2: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#2: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#2: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: freeze_super+0x4f1/0xee0 fs/super.c:2086
#3: ffff888011f7e518 (sb_pagefaults#3){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline]
#3: ffff888011f7e518 (sb_pagefaults#3){++++}-{0:0}, at: freeze_super+0x519/0xee0 fs/super.c:2090
#4: ffff888011f7e610 (sb_internal#3){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline]
#4: ffff888011f7e610 (sb_internal#3){++++}-{0:0}, at: freeze_super+0x7cc/0xee0 fs/super.c:2104
1 lock held by syz.1.382/9438:
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.4.434/9672:
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.1.452/9920:
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.4.484/10156:
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.2.473/10304:
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.3.518/10598:
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz-executor/10777:
#0: ffffffff8fcbf8c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcbf8c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643
2 locks held by syz-executor/10786:
#0: ffffffff8fcb2dd0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490
#1: ffffffff8fcbf8c8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10626
1 lock held by syz.1.546/10801:
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888011f7e0e0 (&type->s_umount_key#84){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.12.0-rc2-syzkaller-00050-g5b7c893ed5ed #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+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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 52 Comm: kworker/u8:3 Not tainted 6.12.0-rc2-syzkaller-00050-g5b7c893ed5ed #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:__lock_acquire+0x137c/0x2050 kernel/locking/lockdep.c:5202
Code: d8 48 c1 e8 03 80 3c 10 00 74 08 48 89 df e8 8b 05 8b 00 48 83 3b 00 0f 84 98 02 00 00 48 8b 7c 24 30 48 8b 74 24 40 44 89 e2 <48> 89 e9 e8 cc 9d 00 00 45 31 f6 85 c0 0f 84 81 00 00 00 48 ba 00
RSP: 0018:ffffc90000bd76d0 EFLAGS: 00000086
RAX: 1ffffffff278b8f1 RBX: ffffffff93c5c788 RCX: ffffffff81706e21
RDX: 0000000000000000 RSI: ffff8880206d4758 RDI: ffff8880206d3c00
RBP: 96fe49e0fc5e5e3f R08: ffffffff942908d7 R09: 1ffffffff285211a
R10: dffffc0000000000 R11: fffffbfff285211b R12: 0000000000000000
R13: ffff8880206d46d8 R14: 1ffff110040da8ef R15: ffff8880206d4778
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb3d7aa6000 CR3: 000000000e734000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
batadv_tvlv_container_ogm_append+0x36/0x4c0 net/batman-adv/tvlv.c:321
batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:812 [inline]
batadv_iv_ogm_schedule+0x27e/0x10a0 net/batman-adv/bat_iv_ogm.c:868
batadv_iv_send_outstanding_bat_ogm_packet+0x6fe/0x810 net/batman-adv/bat_iv_ogm.c:1712
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
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