INFO: task syz.7.300:9446 blocked for more than 143 seconds.
Not tainted 6.14.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.300 state:D stack:23872 pid:9446 tgid:9445 ppid:6776 task_flags:0x400140 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
bfs_lookup+0x139/0x270 fs/bfs/dir.c:136
__lookup_slow+0x296/0x400 fs/namei.c:1793
lookup_slow+0x53/0x70 fs/namei.c:1810
walk_component+0x2e1/0x410 fs/namei.c:2114
lookup_last fs/namei.c:2612 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2636
filename_lookup+0x2a3/0x670 fs/namei.c:2665
user_path_at+0x3a/0x60 fs/namei.c:3072
user_statfs fs/statfs.c:103 [inline]
__do_sys_statfs fs/statfs.c:193 [inline]
__se_sys_statfs+0xda/0x220 fs/statfs.c:190
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: 0033:0x7fc8e598d169
RSP: 002b:00007fc8e67ec038 EFLAGS: 00000246 ORIG_RAX: 0000000000000089
RAX: ffffffffffffffda RBX: 00007fc8e5ba5fa0 RCX: 00007fc8e598d169
RDX: 0000000000000000 RSI: 0000400000000380 RDI: 0000400000000000
RBP: 00007fc8e5a0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc8e5ba5fa0 R15: 00007ffe062583a8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8eb39360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb39360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb39360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
7 locks held by kworker/u8:4/62:
#0: ffff88807bb57148 ((wq_completion)btree_update){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88807bb57148 ((wq_completion)btree_update){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffffc9000153fc60 ((work_completion)(&c->btree_interior_update_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000153fc60 ((work_completion)(&c->btree_interior_update_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3319
#2: ffff88808ae04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:164 [inline]
#2: ffff88808ae04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:256 [inline]
#2: ffff88808ae04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7e4/0xd30 fs/bcachefs/btree_iter.c:3408
#3: ffff8880649c4140 (bcachefs_btree){+.+.}-{0:0}, at: trans_set_locked fs/bcachefs/btree_locking.h:198 [inline]
#3: ffff8880649c4140 (bcachefs_btree){+.+.}-{0:0}, at: bch2_trans_begin+0x9c1/0x1d10 fs/bcachefs/btree_iter.c:3305
#4: ffff88808ae4b208 (journal res){.+.+}-{0:0}, at: bch2_journal_res_get fs/bcachefs/journal.h:389 [inline]
#4: ffff88808ae4b208 (journal res){.+.+}-{0:0}, at: bch2_trans_journal_res_get fs/bcachefs/btree_trans_commit.c:350 [inline]
#4: ffff88808ae4b208 (journal res){.+.+}-{0:0}, at: bch2_trans_commit_write_locked fs/bcachefs/btree_trans_commit.c:652 [inline]
#4: ffff88808ae4b208 (journal res){.+.+}-{0:0}, at: do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:866 [inline]
#4: ffff88808ae4b208 (journal res){.+.+}-{0:0}, at: __bch2_trans_commit+0x3aba/0x9790 fs/bcachefs/btree_trans_commit.c:1070
#5: ffff88808ae049b0 (&c->mark_lock){++++}-{0:0}, at: bch2_accounting_mem_insert+0x6a0/0x1a70 fs/bcachefs/disk_accounting.c:362
#6: ffffffff8eb3e838 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:334 [inline]
#6: ffffffff8eb3e838 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x820 kernel/rcu/tree_exp.h:996
3 locks held by kworker/u8:7/3471:
#0: ffff88814d893948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88814d893948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffffc9000cbb7c60 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000cbb7c60 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3319
#2: ffffffff8fec39c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:129 [inline]
#2: ffffffff8fec39c8 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x10e/0x16a0 net/ipv6/addrconf.c:4190
2 locks held by dhcpcd/5492:
#0: ffffffff8fea88c8 (vlan_ioctl_mutex){+.+.}-{4:4}, at: sock_ioctl+0x661/0x8e0 net/socket.c:1280
#1: ffffffff8fec39c8 (rtnl_mutex){+.+.}-{4:4}, at: vlan_ioctl_handler+0x112/0x9d0 net/8021q/vlan.c:554
2 locks held by getty/5577:
#0: ffff8880323250a0 (&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+0x616/0x1770 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/7325:
#0: ffff8880369e60e0 (&type->s_umount_key#61){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880369e60e0 (&type->s_umount_key#61){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880369e60e0 (&type->s_umount_key#61){+.+.}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffff88808ae00278 (&c->state_lock){+.+.}-{4:4}, at: __bch2_fs_stop+0xfd/0x5c0 fs/bcachefs/super.c:633
3 locks held by kworker/u8:11/8740:
#0: ffff88801b089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801b089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffffc900045efc60 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc900045efc60 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3319
#2: ffffffff8fec39c8 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:285
5 locks held by kworker/u8:12/8742:
#0: ffff88801bef3948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801bef3948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffffc9000b61fc60 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000b61fc60 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3319
#2: ffffffff8feb7190 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x17a/0xd60 net/core/net_namespace.c:606
#3: ffffffff8fec39c8 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0xdc/0x880 net/core/dev.c:12417
#4: ffffffff8eb3e838 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:334 [inline]
#4: ffffffff8eb3e838 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x820 kernel/rcu/tree_exp.h:996
2 locks held by syz.7.300/9446:
#0: ffff88807cf48680 (&type->i_mutex_dir_key#19){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline]
#0: ffff88807cf48680 (&type->i_mutex_dir_key#19){++++}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1809
#1: ffff888028cc9cd8 (&info->bfs_lock){+.+.}-{4:4}, at: bfs_lookup+0x139/0x270 fs/bfs/dir.c:136
4 locks held by syz.7.300/9447:
1 lock held by syz-executor/11367:
#0: ffffffff8fec39c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fec39c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:335 [inline]
#0: ffffffff8fec39c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xc55/0x1d30 net/core/rtnetlink.c:4021
2 locks held by syz-executor/11851:
#0: ffffffff8f664b00 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8f664b00 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8f664b00 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:564
#1: ffffffff8fec39c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fec39c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:335 [inline]
#1: ffffffff8fec39c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xc55/0x1d30 net/core/rtnetlink.c:4021
4 locks held by bch-reclaim/loo/11967:
#0: ffff88808ae4b028 (&j->reclaim_lock){+.+.}-{4:4}, at: bch2_journal_reclaim_thread+0x16d/0x570 fs/bcachefs/journal_reclaim.c:763
#1: ffff88808ae04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:164 [inline]
#1: ffff88808ae04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:256 [inline]
#1: ffff88808ae04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7e4/0xd30 fs/bcachefs/btree_iter.c:3408
#2: ffff88804cf94140 (bcachefs_btree){+.+.}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:164 [inline]
#2: ffff88804cf94140 (bcachefs_btree){+.+.}-{0:0}, at: srcu_read_lock include/linux/srcu.h:256 [inline]
#2: ffff88804cf94140 (bcachefs_btree){+.+.}-{0:0}, at: __bch2_trans_get+0x7e4/0xd30 fs/bcachefs/btree_iter.c:3408
#3: ffff88808ae04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:164 [inline]
#3: ffff88808ae04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:256 [inline]
#3: ffff88808ae04378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: bch2_btree_key_cache_journal_flush+0x128/0xed0 fs/bcachefs/btree_key_cache.c:519
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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: 10264 Comm: syz-executor Not tainted 6.14.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:lookup_object lib/debugobjects.c:423 [inline]
RIP: 0010:debug_object_deactivate+0x19a/0x390 lib/debugobjects.c:875
Code: e7 31 fd 4c 89 3c 24 48 8b 1b 45 31 ff eb 06 48 8b 1b 41 ff c7 48 85 db 74 38 4c 8d 63 18 4c 89 e0 48 c1 e8 03 42 80 3c 30 00 <74> 08 4c 89 e7 e8 7c e7 31 fd 4d 39 2c 24 74 2e 48 89 d8 48 c1 e8
RSP: 0018:ffffc90000a28c20 EFLAGS: 00000046
RAX: 1ffff1100c6b9eab RBX: ffff8880635cf540 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc90000a28b00
RBP: ffffc90000a28d10 R08: 0000000000000003 R09: fffff52000145160
R10: dffffc0000000000 R11: fffff52000145160 R12: ffff8880635cf558
R13: ffff8880b872ce58 R14: dffffc0000000000 R15: 0000000000000000
FS: 00005555619c2500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb8c1db0000 CR3: 000000006323a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
debug_hrtimer_deactivate kernel/time/hrtimer.c:460 [inline]
debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:502
__run_hrtimer kernel/time/hrtimer.c:1769 [inline]
__hrtimer_run_queues+0x305/0xd30 kernel/time/hrtimer.c:1865
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline]
RIP: 0010:vprintk_emit+0x700/0xa10 kernel/printk/printk.c:2431
Code: 00 e8 44 31 21 00 4c 8d bc 24 a0 00 00 00 4d 85 e4 75 07 e8 32 31 21 00 eb 06 e8 2b 31 21 00 fb 49 bc 00 00 00 00 00 fc ff df <48> c7 c7 20 4f a1 8e 31 f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00
RSP: 0018:ffffc900045cf940 EFLAGS: 00000293
RAX: ffffffff81a0ad85 RBX: 0000000000000000 RCX: ffff888032563c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900045cfa50 R08: ffffffff81a0ad5e R09: 1ffffffff28a292b
R10: dffffc0000000000 R11: fffffbfff28a292c R12: dffffc0000000000
R13: 1ffff920008b9f2c R14: ffffffff81a0abc0 R15: ffffc900045cf9e0
_printk+0xd5/0x120 kernel/printk/printk.c:2457
_btrfs_printk+0x5ce/0x610 fs/btrfs/messages.c:248
btrfs_put_super+0x69/0x80 fs/btrfs/super.c:73
generic_shutdown_super+0x139/0x2d0 fs/super.c:642
kill_anon_super+0x3b/0x70 fs/super.c:1237
btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2100
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: 0033:0x7f1ac638e497
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffff68a5e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f1ac640e08c RCX: 00007f1ac638e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffff68a5f10
RBP: 00007ffff68a5f10 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffff68a6fa0
R13: 00007f1ac640e08c R14: 00000000000664d6 R15: 00007ffff68a6fe0