INFO: task kworker/u8:2:36 blocked for more than 143 seconds.
Not tainted 6.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:2 state:D stack:21816 pid:36 tgid:36 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: btree_node_rewrite async_btree_node_rewrite_work
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
__closure_sync+0x163/0x220 lib/closure.c:146
bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:315 [inline]
bch2_btree_update_start+0x171c/0x1dc0 fs/bcachefs/btree_update_interior.c:1292
bch2_btree_node_rewrite+0x17e/0x1120 fs/bcachefs/btree_update_interior.c:2245
bch2_btree_node_rewrite_key fs/bcachefs/btree_update_interior.c:2311 [inline]
async_btree_node_rewrite_work+0x370/0x840 fs/bcachefs/btree_update_interior.c:2368
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz.4.147:7306 blocked for more than 144 seconds.
Not tainted 6.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.147 state:D stack:20520 pid:7306 tgid:7305 ppid:5835 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
__closure_sync+0x163/0x220 lib/closure.c:146
bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:315 [inline]
bch2_btree_update_start+0x171c/0x1dc0 fs/bcachefs/btree_update_interior.c:1292
bch2_btree_split_leaf+0x14b/0x8e0 fs/bcachefs/btree_update_interior.c:1920
bch2_trans_commit_error+0x1b7/0x1130 fs/bcachefs/btree_trans_commit.c:911
__bch2_trans_commit+0x1ce8/0x8880 fs/bcachefs/btree_trans_commit.c:1098
bch2_trans_commit fs/bcachefs/btree_update.h:242 [inline]
bch2_journal_replay+0x1e1c/0x2620 fs/bcachefs/recovery.c:429
bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:485 [inline]
__bch2_run_recovery_passes+0x392/0x1010 fs/bcachefs/recovery_passes.c:540
bch2_run_recovery_passes+0x184/0x210 fs/bcachefs/recovery_passes.c:611
bch2_fs_recovery+0x25fd/0x3950 fs/bcachefs/recovery.c:989
bch2_fs_start+0xa99/0xd90 fs/bcachefs/super.c:1203
bch2_fs_get_tree+0xb02/0x14f0 fs/bcachefs/fs.c:2489
vfs_get_tree+0x92/0x2b0 fs/super.c:1802
do_new_mount+0x24a/0xa40 fs/namespace.c:3885
do_mount fs/namespace.c:4222 [inline]
__do_sys_mount fs/namespace.c:4433 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4410
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9a279900ca
RSP: 002b:00007f9a28775e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f9a28775ef0 RCX: 00007f9a279900ca
RDX: 00002000000000c0 RSI: 0000200000000040 RDI: 00007f9a28775eb0
RBP: 00002000000000c0 R08: 00007f9a28775ef0 R09: 0000000000808040
R10: 0000000000808040 R11: 0000000000000246 R12: 0000200000000040
R13: 00007f9a28775eb0 R14: 0000000000005942 R15: 00002000000002c0
INFO: task bch-reclaim/loo:7361 blocked for more than 145 seconds.
Not tainted 6.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-reclaim/loo state:D stack:23784 pid:7361 tgid:7361 ppid:2 task_flags:0x200840 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
__closure_sync+0x163/0x220 lib/closure.c:146
bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:315 [inline]
bch2_btree_update_start+0x171c/0x1dc0 fs/bcachefs/btree_update_interior.c:1292
bch2_btree_split_leaf+0x14b/0x8e0 fs/bcachefs/btree_update_interior.c:1920
bch2_trans_commit_error+0x1b7/0x1130 fs/bcachefs/btree_trans_commit.c:911
__bch2_trans_commit+0x1ce8/0x8880 fs/bcachefs/btree_trans_commit.c:1098
bch2_trans_commit fs/bcachefs/btree_update.h:242 [inline]
bch2_btree_write_buffer_flush_locked+0x451f/0x4db0 fs/bcachefs/btree_write_buffer.c:455
btree_write_buffer_flush_seq+0x1833/0x19a0 fs/bcachefs/btree_write_buffer.c:573
bch2_btree_write_buffer_journal_flush+0x69/0xb0 fs/bcachefs/btree_write_buffer.c:589
journal_flush_pins+0x8e3/0xe90 fs/bcachefs/journal_reclaim.c:598
__bch2_journal_reclaim+0x8e9/0xea0 fs/bcachefs/journal_reclaim.c:726
bch2_journal_reclaim_thread+0x177/0x4f0 fs/bcachefs/journal_reclaim.c:768
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Showing all locks held in the system:
1 lock held by ksoftirqd/1/23:
1 lock held by khungtaskd/31:
#0: ffffffff8e13ed60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13ed60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13ed60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
4 locks held by kworker/u8:2/36:
#0: ffff888057185948 ((wq_completion)btree_node_rewrite){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff888057185948 ((wq_completion)btree_node_rewrite){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321
#1: ffffc90000ac7bc0 ((work_completion)(&a->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90000ac7bc0 ((work_completion)(&a->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321
#2: ffff88805cf04390 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:161 [inline]
#2: ffff88805cf04390 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:253 [inline]
#2: ffff88805cf04390 (&c->btree_trans_barrier){.+.+}-{0:0}, at: bch2_trans_srcu_lock+0xaf/0x220 fs/bcachefs/btree_iter.c:3255
#3: ffff88805cf26710 (&c->gc_lock){.+.+}-{4:4}, at: bch2_btree_update_start+0x542/0x1dc0 fs/bcachefs/btree_update_interior.c:1211
5 locks held by kworker/u8:5/1035:
2 locks held by getty/5591:
#0: ffff8880353d20a0 (&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-executor/7017:
3 locks held by kworker/1:6/7187:
2 locks held by syz.4.147/7306:
#0: ffff88805cf04390 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:161 [inline]
#0: ffff88805cf04390 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:253 [inline]
#0: ffff88805cf04390 (&c->btree_trans_barrier){.+.+}-{0:0}, at: bch2_trans_srcu_lock+0xaf/0x220 fs/bcachefs/btree_iter.c:3255
#1: ffff88805cf26710 (&c->gc_lock){.+.+}-{4:4}, at: bch2_btree_update_start+0x542/0x1dc0 fs/bcachefs/btree_update_interior.c:1211
4 locks held by bch-reclaim/loo/7361:
#0: ffff88805cf4af68 (&j->reclaim_lock){+.+.}-{4:4}, at: bch2_journal_reclaim_thread+0x16b/0x4f0 fs/bcachefs/journal_reclaim.c:767
#1: ffff88805cf04390 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:161 [inline]
#1: ffff88805cf04390 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:253 [inline]
#1: ffff88805cf04390 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7f4/0xd80 fs/bcachefs/btree_iter.c:3440
#2: ffff88805cf04738 (&wb->flushing.lock){+.+.}-{4:4}, at: btree_write_buffer_flush_seq+0x1829/0x19a0 fs/bcachefs/btree_write_buffer.c:572
#3: ffff88805cf26710 (&c->gc_lock){.+.+}-{4:4}, at: bch2_btree_update_start+0x542/0x1dc0 fs/bcachefs/btree_update_interior.c:1211
1 lock held by syz-executor/7861:
#0: ffffffff8e144878 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#0: ffffffff8e144878 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730 kernel/rcu/tree_exp.h:998
3 locks held by dhcpcd-run-hook/10289:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc2-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:470
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 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: 5185 Comm: klogd Not tainted 6.16.0-rc2-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:update_curr+0x6a1/0x8b0 kernel/sched/fair.c:1272
Code: 2b 2f 4d 0f af ec 4c 39 ed 49 bc 00 00 00 00 00 fc ff df 0f 8c 5d fd ff ff f3 0f 1e fa 48 83 c4 68 5b 41 5c 41 5d 41 5e 41 5f <5d> e9 19 1e cc 09 cc 48 8b 7c 24 08 48 89 de e8 bb 13 00 00 48 89
RSP: 0018:ffffc90003327768 EFLAGS: 00000092
RAX: 1ffff1100fc48b55 RBX: ffff8880b873b898 RCX: ffff88807e245a00
RDX: dffffc0000000000 RSI: ffff8880b873c1c4 RDI: ffff8880b873c1b0
RBP: 0000001c7b1e38f1 R08: ffffffff8f9fe2f7 R09: 1ffffffff1f3fc5e
R10: dffffc0000000000 R11: fffffbfff1f3fc5f R12: dffffc0000000000
R13: ffff8880b873b840 R14: ffff8880b873b840 R15: ffff88807e663c80
FS: 00007f4274c34c80(0000) GS:ffff888125d85000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f636f4106d0 CR3: 00000000348b8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
enqueue_entity+0x5f/0x1120 kernel/sched/fair.c:5331
enqueue_task_fair+0x25a/0x1470 kernel/sched/fair.c:6985
enqueue_task+0x75/0x420 kernel/sched/core.c:2084
activate_task kernel/sched/core.c:2126 [inline]
ttwu_do_activate+0x1ee/0x8b0 kernel/sched/core.c:3746
ttwu_queue kernel/sched/core.c:4014 [inline]
try_to_wake_up+0x745/0x1290 kernel/sched/core.c:4342
autoremove_wake_function+0x17/0x100 kernel/sched/wait.c:384
__wake_up_common kernel/sched/wait.c:89 [inline]
__wake_up_common_lock+0x137/0x1f0 kernel/sched/wait.c:106
sock_def_readable+0x1fb/0x550 net/core/sock.c:3583
unix_dgram_sendmsg+0xd91/0x1870 net/unix/af_unix.c:2225
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:727
__sys_sendto+0x3bd/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4274d84407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffc79584840 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f4274c34c80 RCX: 00007f4274d84407
RDX: 0000000000000052 RSI: 00007ffc79584980 RDI: 0000000000000003
RBP: 00007ffc79584db0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000202 R12: 00007ffc79584dc8
R13: 00007ffc79584980 R14: 0000000000000037 R15: 00007ffc79584980