INFO: task syz-executor:5834 blocked for more than 143 seconds.
Not tainted 6.13.0-rc6-next-20250107-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20160 pid:5834 tgid:5834 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5371 [inline]
__schedule+0x18f6/0x4cd0 kernel/sched/core.c:6758
__schedule_loop kernel/sched/core.c:6835 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6850
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6907
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
jfs_umount+0x2ce/0x3a0 fs/jfs/jfs_umount.c:114
jfs_put_super+0x8a/0x190 fs/jfs/super.c:194
generic_shutdown_super+0x139/0x2d0 fs/super.c:642
kill_block_super+0x44/0x90 fs/super.c:1710
deactivate_locked_super+0xc4/0x130 fs/super.c:473
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1413
task_work_run+0x24f/0x310 kernel/task_work.c:227
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:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f976c987057
RSP: 002b:00007fffc8e77068 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f976ca018f4 RCX: 00007f976c987057
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffc8e77120
RBP: 00007fffc8e77120 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fffc8e781a0
R13: 00007f976ca018f4 R14: 00007fffc8e781e0 R15: 0000000000000024
INFO: task syz-executor:6070 blocked for more than 144 seconds.
Not tainted 6.13.0-rc6-next-20250107-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20160 pid:6070 tgid:6070 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5371 [inline]
__schedule+0x18f6/0x4cd0 kernel/sched/core.c:6758
__schedule_loop kernel/sched/core.c:6835 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6850
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6907
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
jfs_umount+0x2ce/0x3a0 fs/jfs/jfs_umount.c:114
jfs_put_super+0x8a/0x190 fs/jfs/super.c:194
generic_shutdown_super+0x139/0x2d0 fs/super.c:642
kill_block_super+0x44/0x90 fs/super.c:1710
deactivate_locked_super+0xc4/0x130 fs/super.c:473
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1413
task_work_run+0x24f/0x310 kernel/task_work.c:227
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:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f042a787057
RSP: 002b:00007ffc974c7d58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f042a8018f4 RCX: 00007f042a787057
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc974c7e10
RBP: 00007ffc974c7e10 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc974c8e90
R13: 00007f042a8018f4 R14: 00007ffc974c8ed0 R15: 000000000000001e
Showing all locks held in the system:
1 lock held by ksoftirqd/0/16:
1 lock held by khungtaskd/30:
#0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
4 locks held by kworker/u8:2/35:
3 locks held by kworker/u8:3/52:
3 locks held by kworker/u8:7/2902:
2 locks held by getty/5592:
#0: ffff888031d2a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5822:
2 locks held by syz-executor/5833:
#0: ffff88806f0f20e0 (&type->s_umount_key#77){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88806f0f20e0 (&type->s_umount_key#77){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88806f0f20e0 (&type->s_umount_key#77){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8ed56748 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/5834:
#0: ffff88807d9f40e0 (&type->s_umount_key#77){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807d9f40e0 (&type->s_umount_key#77){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807d9f40e0 (&type->s_umount_key#77){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8ed56748 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
3 locks held by kworker/0:4/5885:
#0: ffff88801ac80d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac80d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc9000425fc60 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000425fc60 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffff8880648b1240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x2d1/0x4130 drivers/net/netdevsim/fib.c:1490
7 locks held by kworker/1:7/5928:
2 locks held by syz-executor/6070:
#0: ffff8880595ca0e0 (&type->s_umount_key#77){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880595ca0e0 (&type->s_umount_key#77){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880595ca0e0 (&type->s_umount_key#77){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8ed56748 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/6471:
#0: ffff8880458a40e0 (&type->s_umount_key#77){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880458a40e0 (&type->s_umount_key#77){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880458a40e0 (&type->s_umount_key#77){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8ed56748 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
2 locks held by kworker/u8:9/7157:
#0: ffff888030c8b148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff888030c8b148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc9000452fc60 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000452fc60 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
1 lock held by syz-executor/8642:
#0: ffffffff8fcbb6c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcbb6c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6908
7 locks held by syz-executor/8897:
#0: ffff8880704ea420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3016 [inline]
#0: ffff8880704ea420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x225/0xd10 fs/read_write.c:675
#1: ffff888047b27488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325
#2: ffff8881437ff2d8 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326
#3: ffffffff8f56b408 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
#4: ffff88807806b0e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#4: ffff88807806b0e8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff88807806b0e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293
#5: ffff888078068250 (&devlink->lock_key#11){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1675
#6: ffffffff8e93d280 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3741
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc6-next-20250107-syzkaller #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:234 [inline]
watchdog+0xff6/0x1040 kernel/hung_task.c:397
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
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: 8642 Comm: syz-executor Not tainted 6.13.0-rc6-next-20250107-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:409
Code: 80 37 49 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 31 87 af fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d c3 cc cc cc cc 89 e9 80 e1 07 38 c1 7c
RSP: 0018:ffffc900045ce338 EFLAGS: 00000002
RAX: 1ffffffff34e5000 RBX: ffffffff9a728080 RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: ffffffff857601d6 R09: 1ffff110049de046
R10: dffffc0000000000 R11: ffffffff85760190 R12: dffffc0000000000
R13: ffffffff9a422f30 R14: 00000000000003fd R15: dffffc0000000000
FS: 000055558ab27500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4a667bb3b0 CR3: 000000004218c000 CR4: 00000000003526f0
DR0: 0000000000002800 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:137 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:159 [inline]
wait_for_lsr drivers/tty/serial/8250/8250_port.c:2087 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3340 [inline]
serial8250_console_write+0x1373/0x1ed0 drivers/tty/serial/8250/8250_port.c:3418
console_emit_next_record kernel/printk/printk.c:3122 [inline]
console_flush_all+0x869/0xeb0 kernel/printk/printk.c:3210
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3309
vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2432
_printk+0xd5/0x120 kernel/printk/printk.c:2457
netdev_info+0x122/0x170 net/core/dev.c:11995
__dev_set_promiscuity+0x1c1/0x5a0 net/core/dev.c:8740
__dev_set_rx_mode+0x197/0x280
dev_uc_add+0xca/0x110 net/core/dev_addr_lists.c:692
macvlan_open+0x44c/0x8c0 drivers/net/macvlan.c:646
__dev_open+0x2d3/0x450 net/core/dev.c:1476
__dev_change_flags+0x1e2/0x6f0 net/core/dev.c:8951
dev_change_flags+0x8b/0x1a0 net/core/dev.c:9023
do_setlink+0xc90/0x4210 net/core/rtnetlink.c:3109
rtnl_changelink net/core/rtnetlink.c:3723 [inline]
__rtnl_newlink net/core/rtnetlink.c:3875 [inline]
rtnl_newlink+0x1bb6/0x2210 net/core/rtnetlink.c:4012
rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6902
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:726
__sys_sendto+0x363/0x4c0 net/socket.c:2208
__do_sys_sendto net/socket.c:2215 [inline]
__se_sys_sendto net/socket.c:2211 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2211
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: 0033:0x7f3ca9387bbc
Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b
RSP: 002b:00007ffc5a4ed790 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f3caa0a4620 RCX: 00007f3ca9387bbc
RDX: 000000000000002c RSI: 00007f3caa0a4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc5a4ed7e4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f3caa0a4670 R15: 0000000000000000