INFO: task kworker/R-ipv6_:3169 blocked for more than 143 seconds.
Not tainted 6.14.0-rc1-syzkaller-00197-gacdefab0dcbc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/R-ipv6_ state:D stack:27992 pid:3169 tgid:3169 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
rescuer_thread+0xf43/0x10a0 kernel/workqueue.c:3548
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
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e9387e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e9387e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e9387e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
2 locks held by kworker/u8:6/3059:
2 locks held by dhcpcd/5501:
3 locks held by dhcpcd/5502:
2 locks held by getty/5591:
#0: ffff888031a1c0a0 (&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/5817:
1 lock held by syz-executor/5832:
3 locks held by kworker/0:4/5885:
#0: ffff88801ac80d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline]
#0: ffff88801ac80d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3317
#1: ffffc9000487fc60 ((fqdir_free_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline]
#1: ffffc9000487fc60 ((fqdir_free_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3317
#2: ffffffff8e93db80 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3741
3 locks held by kworker/0:6/5914:
#0: ffff88801ac80d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline]
#0: ffff88801ac80d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3317
#1: ffffc900048efc60 (free_ipc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline]
#1: ffffc900048efc60 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3317
#2: ffffffff8e93dcb8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:334 [inline]
#2: ffffffff8e93dcb8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:996
2 locks held by syz-executor/8319:
2 locks held by syz-executor/8326:
#0: ffff888031a48d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:480 [inline]
#0: ffff888031a48d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2677
#1: ffff888031a48078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x5c8/0x11c0 net/bluetooth/hci_sync.c:5185
1 lock held by syz.8.835/9060:
#0: ffffffff8fcb3bd0 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512
5 locks held by syz.6.853/9140:
2 locks held by syz-executor/9163:
2 locks held by syz-executor/9166:
2 locks held by dhcpcd/9169:
#0: ffff88808e2da258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1624 [inline]
#0: ffff88808e2da258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3253
#1: ffffffff8e93dcb8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:334 [inline]
#1: ffffffff8e93dcb8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:996
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc1-syzkaller-00197-gacdefab0dcbc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
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: 5817 Comm: syz-executor Not tainted 6.14.0-rc1-syzkaller-00197-gacdefab0dcbc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:page_zone_id include/linux/mm.h:1640 [inline]
RIP: 0010:page_is_buddy mm/internal.h:588 [inline]
RIP: 0010:find_buddy_page_pfn+0xb3/0x200 mm/internal.h:643
Code: 03 42 80 3c 38 00 74 08 48 89 ef e8 37 fb 0c 00 44 39 75 00 0f 85 ab 00 00 00 4f 8d 34 2c 4c 89 e0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 e7 e8 13 fb 0c 00 49 8b 1c 24 48 c1 eb 37 4c 89 f5 48
RSP: 0018:ffffc90003fff768 EFLAGS: 00000046
RAX: 1ffffd4000f83a60 RBX: 00000000001f0748 RCX: 0000000000000002
RDX: 0000000000000002 RSI: 00000000001f074c RDI: ffffea0007c1d300
RBP: ffffea0007c1d228 R08: ffffea0007c1d337 R09: 1ffffd4000f83a66
R10: dffffc0000000000 R11: fffff94000f83a67 R12: ffffea0007c1d300
R13: ffffffffffffff00 R14: ffffea0007c1d200 R15: dffffc0000000000
FS: 000055557e867500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0513f90580 CR3: 000000007c9f0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
buddy_merge_likely mm/page_alloc.c:743 [inline]
__free_one_page+0x614/0x9c0 mm/page_alloc.c:850
free_pcppages_bulk+0x3c7/0x5e0 mm/page_alloc.c:1220
free_frozen_page_commit+0x582/0x1140 mm/page_alloc.c:2635
free_frozen_pages+0x74f/0x10e0 mm/page_alloc.c:2683
discard_slab mm/slub.c:2684 [inline]
__put_partials+0x160/0x1c0 mm/slub.c:3153
put_cpu_partial+0x17c/0x250 mm/slub.c:3228
__slab_free+0x290/0x380 mm/slub.c:4479
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4115 [inline]
slab_alloc_node mm/slub.c:4164 [inline]
kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171
alloc_empty_file+0x9e/0x1d0 fs/file_table.c:228
alloc_file fs/file_table.c:345 [inline]
alloc_file_clone+0x58/0xe0 fs/file_table.c:412
create_pipe_files+0x3e7/0x700 fs/pipe.c:951
__do_pipe_flags+0x48/0x2d0 fs/pipe.c:974
do_pipe2+0xd4/0x310 fs/pipe.c:1025
__do_sys_pipe2 fs/pipe.c:1043 [inline]
__se_sys_pipe2 fs/pipe.c:1041 [inline]
__x64_sys_pipe2+0x5a/0x70 fs/pipe.c:1041
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: 0033:0x7fbbd0f8bb09
Code: c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 31 f6 b8 25 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 07 c3 66 0f 1f 44 00 00 48 c7 c2 a8 ff ff ff
RSP: 002b:00007ffe7d7408e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000125
RAX: ffffffffffffffda RBX: 000055557e87f620 RCX: 00007fbbd0f8bb09
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe7d740908
RBP: 00007ffe7d740cb0 R08: 0000000000000007 R09: 000055557e87d370
R10: fac2ce0bcee859f5 R11: 0000000000000246 R12: 000055557e87ec50
R13: 000055557e880378 R14: 00007ffe7d740a30 R15: 000055557e892c18