INFO: task syz-executor:5834 blocked for more than 143 seconds.
Not tainted 6.13.0-rc3-next-20241220-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20528 pid:5834 tgid:5834 ppid:1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5371 [inline]
__schedule+0x189f/0x4c80 kernel/sched/core.c:6758
__schedule_loop kernel/sched/core.c:6835 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6850
bit_wait+0x12/0xd0 kernel/sched/wait_bit.c:237
__wait_on_bit+0xb0/0x2f0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x1d5/0x260 kernel/sched/wait_bit.c:64
wait_on_bit include/linux/wait_bit.h:77 [inline]
gfs2_glock_wait+0xc7/0x2b0 fs/gfs2/glock.c:1346
gfs2_glock_nq_init fs/gfs2/glock.h:238 [inline]
__gfs2_lookup+0x11b/0x280 fs/gfs2/inode.c:906
__lookup_slow+0x28c/0x3f0 fs/namei.c:1791
lookup_slow+0x53/0x70 fs/namei.c:1808
walk_component+0x2e1/0x410 fs/namei.c:2112
lookup_last fs/namei.c:2610 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2634
filename_lookup+0x2a3/0x670 fs/namei.c:2663
user_path_at+0x3a/0x60 fs/namei.c:3070
ksys_umount fs/namespace.c:2072 [inline]
__do_sys_umount fs/namespace.c:2080 [inline]
__se_sys_umount fs/namespace.c:2078 [inline]
__x64_sys_umount+0xf1/0x170 fs/namespace.c:2078
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: 0033:0x7fea50387057
RSP: 002b:00007fff253b2af8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007fea504018f4 RCX: 00007fea50387057
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff253b2bb0
RBP: 00007fff253b2bb0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff253b3ca0
R13: 00007fea504018f4 R14: 0000555591a074a8 R15: 0000000000000017
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
5 locks held by kworker/u8:7/3120:
#0: ffff8880b863e998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:606
#1: ffffc9000c507c60 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000c507c60 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffff8880255608d8 (&lo->lo_work_lock){..-.}-{3:3}, at: spin_lock_irq include/linux/spinlock.h:376 [inline]
#2: ffff8880255608d8 (&lo->lo_work_lock){..-.}-{3:3}, at: loop_process_work+0x15b/0x21c0 drivers/block/loop.c:1937
#3: ffffffff9a6c0250 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_assert_init+0x17c/0x4b0 lib/debugobjects.c:1007
#4: ffffffff9a691fc0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x17f/0x580 lib/debugobjects.c:818
2 locks held by getty/5588:
#0: ffff88814d5b30a0 (&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/5834:
#0: ffff8880566fb018 (&type->i_mutex_dir_key#15){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:873 [inline]
#0: ffff8880566fb018 (&type->i_mutex_dir_key#15){.+.+}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1807
6 locks held by kworker/1:4/5881:
#0: ffff8880206f8148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff8880206f8148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc900044afc60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc900044afc60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffff888144f94190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#2: ffff888144f94190 (&dev->mutex){....}-{4:4}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849
#3: ffff88802e357190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff88802e357190 (&dev->mutex){....}-{4:4}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1005
#4: ffff888033105160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#4: ffff888033105160 (&dev->mutex){....}-{4:4}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1005
#5: ffffffff8fcbab48 (rtnl_mutex){+.+.}-{4:4}, at: register_netdev+0x13/0x50 net/core/dev.c:10734
3 locks held by kworker/u8:9/6253:
#0: ffff888031018948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff888031018948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc9000435fc60 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000435fc60 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffffffff8fcbab48 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4215
3 locks held by kworker/u8:12/7878:
3 locks held by syz.3.502/9647:
#0: ffffffff8fd1db10 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffff888030e726c8 (nlk_cb_mutex-GENERIC){+.+.}-{4:4}, at: __netlink_dump_start+0x119/0x790 net/netlink/af_netlink.c:2396
#2: ffffffff8fcbab48 (rtnl_mutex){+.+.}-{4:4}, at: nl80211_prepare_wdev_dump+0x3fb/0x6c0 net/wireless/nl80211.c:1009
3 locks held by syz.6.513/9684:
#0: ffff88807e11b1c0 (&tty->legacy_mutex){+.+.}-{4:4}, at: tty_set_ldisc+0x52/0x560 drivers/tty/tty_ldisc.c:528
#1: ffff88807e11b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: __tty_ldisc_lock drivers/tty/tty_ldisc.c:289 [inline]
#1: ffff88807e11b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock+0x6c/0xc0 drivers/tty/tty_ldisc.c:313
#2: ffffffff8fcbab48 (rtnl_mutex){+.+.}-{4:4}, at: ldisc_open+0x4a0/0x850 drivers/net/caif/caif_serial.c:350
1 lock held by syz.6.513/9690:
#0: ffff88807e11b1c0 (&tty->legacy_mutex){+.+.}-{4:4}, at: tty_set_ldisc+0x52/0x560 drivers/tty/tty_ldisc.c:528
1 lock held by syz.6.513/9691:
#0: ffff88807e11b1c0 (&tty->legacy_mutex){+.+.}-{4:4}, at: __tty_hangup+0xc9/0x6b0 drivers/tty/tty_io.c:584
2 locks held by syz.9.515/9689:
#0: ffff88804c20e0e0 (&type->s_umount_key#27/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0 fs/super.c:344
#1: ffffffff8eb140c8 (ext4_li_mtx){+.+.}-{4:4}, at: ext4_register_li_request+0x74/0x970 fs/ext4/super.c:3991
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-next-20241220-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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 9689 Comm: syz.9.515 Not tainted 6.13.0-rc3-next-20241220-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 arch/x86/include/asm/idtentry.h:702
Code: 76 c0 f1 0a e9 71 06 00 00 90 f3 0f 1e fa 0f 01 ca fc 6a ff e8 21 05 00 00 48 89 c4 48 89 e7 e8 86 bf f1 0a e9 51 06 00 00 90 0f 1e fa 0f 01 ca fc 6a ff e8 01 05 00 00 48 89 c4 48 89 e7 e8
RSP: 0018:ffffc90003505ff8 EFLAGS: 00000046
RAX: ffffffff819e7d41 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90014889000 RSI: 000000000000430c RDI: 000000000000430d
RBP: ffffc900035060f0 R08: ffffffff819e7d17 R09: 1ffffffff285af1d
R10: dffffc0000000000 R11: fffffbfff285af1e R12: 0000000000000000
R13: 0000000000000200 R14: 1ffff920006a0c08 R15: 0000000000000046
FS: 00007f7f0c8366c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 000000006e334000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
RIP: 0010:__down_trylock_console_sem+0x1b4/0x250 kernel/printk/printk.c:329
Code: 75 11 e8 ff a6 20 00 4d 85 ed 75 16 e8 f5 a6 20 00 eb 15 e8 ee a6 20 00 e8 e9 69 53 0a 4d 85 ed 74 ea e8 df a6 20 00 fb 31 db <31> ff 44 89 e6 e8 12 ab 20 00 45 85 e4 74 0c e8 c8 a6 20 00 bb 01
RSP: 0018:ffffc90003506020 EFLAGS: 00000246