INFO: task syz.2.15:5418 blocked for more than 143 seconds.
Not tainted 6.11.0-syzkaller-10045-g97d8894b6f4c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.15 state:D stack:24352 pid:5418 tgid:5391 ppid:5221 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6674
__schedule_loop kernel/sched/core.c:6751 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6766
io_schedule+0x8d/0x110 kernel/sched/core.c:7551
folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1309
folio_wait_writeback+0xe7/0x1e0 mm/page-writeback.c:3189
truncate_inode_pages_range+0xafd/0xfc0 mm/truncate.c:398
truncate_inode_pages mm/truncate.c:423 [inline]
truncate_pagecache mm/truncate.c:727 [inline]
truncate_setsize+0xcf/0xf0 mm/truncate.c:752
bchfs_truncate+0x6df/0xc70 fs/bcachefs/fs-io.c:441
notify_change+0xbca/0xe90 fs/attr.c:503
do_truncate+0x220/0x310 fs/open.c:65
handle_truncate fs/namei.c:3395 [inline]
do_open fs/namei.c:3778 [inline]
path_openat+0x2e1e/0x3590 fs/namei.c:3933
do_filp_open+0x235/0x490 fs/namei.c:3960
do_sys_openat2+0x13e/0x1d0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_creat fs/open.c:1506 [inline]
__se_sys_creat fs/open.c:1500 [inline]
__x64_sys_creat+0x123/0x170 fs/open.c:1500
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: 0033:0x7f054537def9
RSP: 002b:00007f05461f1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f0545536058 RCX: 00007f054537def9
RDX: 0000000000000000 RSI: 0000000000000105 RDI: 0000000020004b40
RBP: 00007f05453f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f0545536058 R15: 00007ffc5c493488
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8e93d478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#0: ffffffff8e93d478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
1 lock held by khungtaskd/30:
#0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6701
2 locks held by kworker/u8:5/82:
1 lock held by udevd/4669:
2 locks held by getty/4976:
#0: ffff88814badf0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5217:
#0: ffff88805664e0e0 (&type->s_umount_key#82){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88805664e0e0 (&type->s_umount_key#82){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88805664e0e0 (&type->s_umount_key#82){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffff888059c00278 (&c->state_lock){+.+.}-{3:3}, at: __bch2_fs_stop+0xfd/0x540 fs/bcachefs/super.c:618
3 locks held by kworker/0:4/5268:
1 lock held by syz.2.15/5392:
#0: ffff888032a00420 (sb_writers#21){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2930 [inline]
#0: ffff888032a00420 (sb_writers#21){.+.+}-{0:0}, at: vfs_writev+0x2d1/0xba0 fs/read_write.c:1062
2 locks held by syz.2.15/5418:
#0: ffff888032a00420 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88805e7a8148 (&sb->s_type->i_mutex_key#28){++++}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#1: ffff88805e7a8148 (&sb->s_type->i_mutex_key#28){++++}-{3:3}, at: do_truncate+0x20c/0x310 fs/open.c:63
1 lock held by bch-reclaim/loo/5520:
1 lock held by syz-executor/5675:
#0: ffffffff8e93d478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#0: ffffffff8e93d478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
3 locks held by kworker/u8:9/5988:
#0: ffff88814b6a5948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88814b6a5948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc9000436fd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000436fd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff8fcbb748 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196
2 locks held by syz.0.103/5991:
#0: ffff888032a000e0 (&type->s_umount_key#82){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888032a000e0 (&type->s_umount_key#82){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff888032a00938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2619 [inline]
#1: ffff888032a00938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x32e/0xb50 fs/fs-writeback.c:2802
3 locks held by syz.2.189/6404:
#0: ffff888032a000e0 (&type->s_umount_key#82){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888032a000e0 (&type->s_umount_key#82){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff888058d04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff888058d04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff888058d04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7de/0xd20 fs/bcachefs/btree_iter.c:3215
#2: ffff888058d266d0 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1202
1 lock held by syz.0.206/6522:
#0: ffff88805664e0e0 (&type->s_umount_key#82){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805664e0e0 (&type->s_umount_key#82){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
2 locks held by syz-executor/6526:
#0: ffffffff8fcbb748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcbb748 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643
#1: ffff888066065428 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_open+0x22d/0x420 drivers/net/wireguard/device.c:50
1 lock held by syz-executor/6614:
#0: ffffffff8fcbb748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcbb748 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643
2 locks held by syz.3.228/6787:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-10045-g97d8894b6f4c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
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: 5520 Comm: bch-reclaim/loo Not tainted 6.11.0-syzkaller-10045-g97d8894b6f4c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:time_stats_to_quantiles fs/bcachefs/time_stats.h:100 [inline]
RIP: 0010:time_stats_update_one+0xa1/0x7b0 fs/bcachefs/time_stats.c:76
Code: e8 a4 11 4b fd e9 a4 04 00 00 49 8d 7d 40 48 89 f8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 fa 06 00 00 41 0f b6 45 40 88 04 24 <0f> b6 f0 31 ff e8 75 14 4b fd 49 8d bd 90 00 00 00 48 89 f8 48 c1
RSP: 0018:ffffc90008dd7268 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 00000035b2ee258c RCX: ffff888025863c00
RDX: 0000000000000000 RSI: ffffffffffffe37b RDI: ffff888059c51c80
RBP: 00000035b2ee258c R08: ffffffff8449a20d R09: fffff520011bae3c
R10: dffffc0000000000 R11: fffff520011bae3c R12: 00000035b2ee4211
R13: ffff888059c51c40 R14: 00000035b2ee4211 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb493361060 CR3: 000000002f744000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__bch2_time_stats_update+0x1c6/0x370 fs/bcachefs/time_stats.c:128
bch2_trans_begin+0x785/0x1c00 fs/bcachefs/btree_iter.c:3094
bch2_btree_write_buffer_flush_locked+0x15e/0x59f0 fs/bcachefs/btree_write_buffer.c:281
btree_write_buffer_flush_seq+0x1a43/0x1bc0 fs/bcachefs/btree_write_buffer.c:510
bch2_btree_write_buffer_journal_flush+0x4e/0x80 fs/bcachefs/btree_write_buffer.c:525
journal_flush_pins+0x5f7/0xb20 fs/bcachefs/journal_reclaim.c:565
__bch2_journal_reclaim+0x789/0xdc0 fs/bcachefs/journal_reclaim.c:698
bch2_journal_reclaim_thread+0x174/0x560 fs/bcachefs/journal_reclaim.c:740
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244