INFO: task syz.0.17:6105 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17 state:D stack:25544 pid:6105 tgid:6101 ppid:6030 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5360 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6964
__schedule_loop kernel/sched/core.c:7046 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7061
super_lock+0x1c8/0x3b0 fs/super.c:115
__iterate_supers+0x126/0x290 fs/super.c:922
quota_sync_all fs/quota/quota.c:69 [inline]
__do_sys_quotactl fs/quota/quota.c:938 [inline]
__se_sys_quotactl+0x353/0x950 fs/quota/quota.c:917
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcb3658ebe9
RSP: 002b:00007fcb35bdd038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fcb367c6090 RCX: 00007fcb3658ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007fcb36611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcb367c6128 R14: 00007fcb367c6090 R15: 00007ffc4495e488
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e53cf20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e53cf20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e53cf20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:7/3161:
#0: ffff8880b8739f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:636
#1: ffff8880b8724008 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880 kernel/sched/psi.c:933
2 locks held by getty/5615:
#0: ffff88814d29d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
1 lock held by syz.0.17/6102:
#0: ffff888032de00e0 (&type->s_umount_key#52/1){+.+.}-{4:4}, at: alloc_super+0x1bb/0x930 fs/super.c:344
1 lock held by syz.1.18/6182:
#0: ffff8880599e20e0 (&type->s_umount_key#52/1){+.+.}-{4:4}, at: alloc_super+0x1bb/0x930 fs/super.c:344
1 lock held by syz.2.19/6212:
#0: ffff88807c7a80e0 (&type->s_umount_key#52/1){+.+.}-{4:4}, at: alloc_super+0x1bb/0x930 fs/super.c:344
1 lock held by syz.3.20/6237:
#0: ffff88807a8ea0e0 (&type->s_umount_key#52/1){+.+.}-{4:4}, at: alloc_super+0x1bb/0x930 fs/super.c:344
1 lock held by syz.4.21/6266:
#0: ffff8880562180e0 (&type->s_umount_key#52/1){+.+.}-{4:4}, at: alloc_super+0x1bb/0x930 fs/super.c:344
1 lock held by syz.5.22/6297:
#0: ffff88807492c0e0 (&type->s_umount_key#52/1){+.+.}-{4:4}, at: alloc_super+0x1bb/0x930 fs/super.c:344
1 lock held by syz.6.23/6332:
#0: ffff888063d4c0e0 (&type->s_umount_key#52/1){+.+.}-{4:4}, at: alloc_super+0x1bb/0x930 fs/super.c:344
1 lock held by syz.7.24/6361:
#0: ffff88806f40c0e0 (&type->s_umount_key#52/1){+.+.}-{4:4}, at: alloc_super+0x1bb/0x930 fs/super.c:344
1 lock held by syz.8.25/6392:
#0: ffff88805d9d40e0 (&type->s_umount_key#52/1){+.+.}-{4:4}, at: alloc_super+0x1bb/0x930 fs/super.c:344
3 locks held by syz-executor/6397:
#0: ffffffff8f0c1a60 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8f0c1a60 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8f0c1a60 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570
#1: ffffffff8f953748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#1: ffffffff8f953748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#1: ffffffff8f953748 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8db/0x1c70 net/core/rtnetlink.c:4056
#2: ffffffff8e5429b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
#2: ffffffff8e5429b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730 kernel/rcu/tree_exp.h:957
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
watchdog+0xf60/0xfa0 kernel/hung_task.c:495
kthread+0x70e/0x8a0 kernel/kthread.c:463
ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6397 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:kasan_check_byte include/linux/kasan.h:399 [inline]
RIP: 0010:lock_acquire+0x85/0x360 kernel/locking/lockdep.c:5842
Code: 51 fa 08 00 84 c0 75 0d f6 05 19 6a 30 0e 01 0f 84 d7 01 00 00 83 3d d9 b4 46 0e 00 0f 84 f0 00 00 00 48 8b b4 24 90 00 00 00 <4c> 89 ef e8 f3 38 86 00 83 3d bc b4 46 0e 00 0f 84 fa 00 00 00 65
RSP: 0018:ffffc90000a08aa0 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 4c2882266410dc00
RDX: 0000000000000000 RSI: ffffffff8b897507 RDI: ffffffff8c04ff20
RBP: ffffffff84dadc0a R08: 0000000000000001 R09: 0000000000000000
R10: ffffc90000a08bf0 R11: fffff52000141180 R12: 0000000000000000
R13: ffffffff9a11c678 R14: 0000000000000000 R15: 0000000000000001
FS: 000055557198c500(0000) GS:ffff8881258ba000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f99ccaf7d60 CR3: 000000005dffc000 CR4: 00000000003526f0
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162
debug_object_deactivate+0x9a/0x250 lib/debugobjects.c:873
debug_timer_deactivate kernel/time/timer.c:798 [inline]
debug_deactivate kernel/time/timer.c:842 [inline]
detach_timer+0x33/0x2d0 kernel/time/timer.c:889
expire_timers kernel/time/timer.c:1781 [inline]
__run_timers kernel/time/timer.c:2372 [inline]
__run_timer_base+0x59b/0x860 kernel/time/timer.c:2384
run_timer_base kernel/time/timer.c:2393 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
handle_softirqs+0x283/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2034 [inline]
RIP: 0010:vprintk_emit+0x49d/0x590 kernel/printk/printk.c:2422
Code: 0f 84 34 ff ff ff e8 52 99 1f 00 fb eb 44 e8 4a 99 1f 00 e8 95 75 e5 09 4d 85 f6 74 94 e8 3b 99 1f 00 fb 48 c7 c7 40 0f 53 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 6b 3b
RSP: 0018:ffffc9000461eb60 EFLAGS: 00000293
RAX: ffffffff81a16c85 RBX: ffffffff81a16ade RCX: ffff88802b595ac0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e530f40
RBP: ffffc9000461ec70 R08: ffffffff8fe52c37 R09: 1ffffffff1fca586
R10: dffffc0000000000 R11: fffffbfff1fca587 R12: 0000000000000000
R13: 0000000000000025 R14: 0000000000000200 R15: 1ffff920008c3d70
_printk+0xcf/0x120 kernel/printk/printk.c:2448
netdev_info+0x10a/0x160 net/core/dev.c:12702
__dev_set_promiscuity+0x307/0x740 net/core/dev.c:9410
netif_set_promiscuity+0x50/0xe0 net/core/dev.c:9445
dev_set_promiscuity+0x126/0x260 net/core/dev_api.c:287
hsr_portdev_setup net/hsr/hsr_slave.c:154 [inline]
hsr_add_port+0x549/0x890 net/hsr/hsr_slave.c:208
hsr_dev_finalize+0x685/0xaa0 net/hsr/hsr_device.c:757
hsr_newlink+0x7d7/0x940 net/hsr/hsr_netlink.c:122
rtnl_newlink_create+0x30d/0xb00 net/core/rtnetlink.c:3825
__rtnl_newlink net/core/rtnetlink.c:3942 [inline]
rtnl_newlink+0x16d6/0x1c70 net/core/rtnetlink.c:4057
rtnetlink_rcv_msg+0x7cc/0xb70 net/core/rtnetlink.c:6946
netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:714 [inline]
__sock_sendmsg+0x219/0x270 net/socket.c:729
__sys_sendto+0x3bd/0x520 net/socket.c:2228
__do_sys_sendto net/socket.c:2235 [inline]
__se_sys_sendto net/socket.c:2231 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2231
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f99cbd90a7c
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:00007ffc812181f0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f99ccaf4620 RCX: 00007f99cbd90a7c
RDX: 0000000000000048 RSI: 00007f99ccaf4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc81218244 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f99ccaf4670 R15: 0000000000000000