BTRFS warning (device loop3): excessive commit interval 622039222 BTRFS info (device loop3): force zlib compression, level 3 BTRFS info (device loop3): using free space tree BTRFS info (device loop3): has skinny extents INFO: task syz-executor.1:11905 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28560 11905 8122 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 bond0: Enslaving bridge8 as an active interface with an up link schedule+0x8d/0x1b0 kernel/sched/core.c:3561 d_wait_lookup fs/dcache.c:2430 [inline] d_alloc_parallel+0x1292/0x19e0 fs/dcache.c:2512 __lookup_slow+0x18d/0x4a0 fs/namei.c:1655 lookup_slow fs/namei.c:1689 [inline] walk_component+0x7ac/0xda0 fs/namei.c:1811 lookup_last fs/namei.c:2274 [inline] path_lookupat+0x1ff/0x8d0 fs/namei.c:2319 filename_lookup+0x1ac/0x5a0 fs/namei.c:2349 user_path_at include/linux/namei.h:57 [inline] path_setxattr+0x95/0x190 fs/xattr.c:534 __do_sys_lsetxattr fs/xattr.c:561 [inline] __se_sys_lsetxattr fs/xattr.c:557 [inline] __x64_sys_lsetxattr+0xbd/0x150 fs/xattr.c:557 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f28a3b220f9 Code: Bad RIP value. RSP: 002b:00007f2899c39168 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007f28a3c421f0 RCX: 00007f28a3b220f9 RDX: 0000000020004bc0 RSI: 0000000020000140 RDI: 0000000020000080 RBP: 00007f28a3b7dae9 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000084 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe3ae019cf R14: 00007f2899c39300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/u4:4/814: 1 lock held by khungtaskd/1571: #0: 000000006ef26ac2 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by systemd-udevd/4696: 1 lock held by in:imklog/7740: #0: 000000009cdcdc27 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-fuzzer/8118: 1 lock held by syz-executor.3/8124: #0: 00000000385a27f7 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #0: 00000000385a27f7 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 2 locks held by kworker/0:4/9349: #0: 000000007ac44a1e ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000b2240379 ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 2 locks held by syz-executor.1/11903: 1 lock held by syz-executor.1/11905: #0: 00000000e4faf58a (&type->i_mutex_dir_key#13){.+.+}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000e4faf58a (&type->i_mutex_dir_key#13){.+.+}, at: lookup_slow fs/namei.c:1688 [inline] #0: 00000000e4faf58a (&type->i_mutex_dir_key#13){.+.+}, at: walk_component+0x798/0xda0 fs/namei.c:1811 1 lock held by syz-executor.1/19683: #0: 00000000385a27f7 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #0: 00000000385a27f7 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x256/0x6f0 kernel/rcu/tree_exp.h:667 4 locks held by syz-executor.2/19724: #0: 00000000e6ecf67d (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 00000000e6ecf67d (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 000000006ef26ac2 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 000000006ef26ac2 (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 #2: 000000006e8d8d95 (&sig->wait_chldexit){....}, at: __wake_up_common_lock+0xb0/0x170 kernel/sched/wait.c:120 #3: 00000000b5d7cf0e (&(&sig->stats_lock)->seqcount){....}, at: exit_notify kernel/exit.c:745 [inline] #3: 00000000b5d7cf0e (&(&sig->stats_lock)->seqcount){....}, at: do_exit+0x15be/0x2be0 kernel/exit.c:890 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 814 Comm: kworker/u4:4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Workqueue: netns cleanup_net RIP: 0010:preempt_count_equals kernel/sched/core.c:6126 [inline] RIP: 0010:___might_sleep+0x70/0x2b0 kernel/sched/core.c:6159 Code: 8b 34 25 c0 df 01 00 49 8d be 70 03 00 00 41 81 e5 ff ff ff 7f 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e e8 01 00 00 45 03 ae 70 03 00 00 44 39 eb RSP: 0018:ffff8880b3d7fb50 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 1ffff1101684b09e RSI: 00000000ffffffff RDI: ffff8880b42584f0 RBP: ffffffff8950efc0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000774 R13: 0000000000000000 R14: ffff8880b4258180 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f395d0591b8 CR3: 0000000036bfb000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: get_next_corpse net/netfilter/nf_conntrack_core.c:1908 [inline] nf_ct_iterate_cleanup+0x24c/0x520 net/netfilter/nf_conntrack_core.c:1930 nf_conntrack_cleanup_net_list+0x7e/0x250 net/netfilter/nf_conntrack_core.c:2117 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415