INFO: task syz.3.4:5397 blocked for more than 143 seconds.
Not tainted 6.11.0-syzkaller-08068-g1ec6d097897a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.4 state:D stack:26352 pid:5397 tgid:5340 ppid:5231 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5264 [inline]
__schedule+0x1843/0x4b00 kernel/sched/core.c:6607
__schedule_loop kernel/sched/core.c:6684 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6699
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6756
rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common kernel/locking/rwsem.c:1306 [inline]
__down_write kernel/locking/rwsem.c:1315 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1580
inode_lock include/linux/fs.h:815 [inline]
bch2_direct_write+0x245/0x3160 fs/bcachefs/fs-io-direct.c:598
bch2_write_iter+0x194/0x2480 fs/bcachefs/fs-io-buffered.c:1041
new_sync_write fs/read_write.c:590 [inline]
vfs_write+0xa6d/0xc90 fs/read_write.c:683
ksys_write+0x1a0/0x2c0 fs/read_write.c:736
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: 0033:0x7f75b057def9
RSP: 002b:00007f75b128f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f75b0736058 RCX: 00007f75b057def9
RDX: 0000000000000007 RSI: 0000000020000040 RDI: 0000000000000005
RBP: 00007f75b05f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f75b0736058 R15: 00007ffef999bca8
INFO: task syz.3.4:5398 blocked for more than 145 seconds.
Not tainted 6.11.0-syzkaller-08068-g1ec6d097897a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.4 state:D stack:26296 pid:5398 tgid:5340 ppid:5231 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5264 [inline]
__schedule+0x1843/0x4b00 kernel/sched/core.c:6607
__schedule_loop kernel/sched/core.c:6684 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6699
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6756
rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common kernel/locking/rwsem.c:1306 [inline]
__down_write kernel/locking/rwsem.c:1315 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1580
inode_lock include/linux/fs.h:815 [inline]
bch2_direct_write+0x245/0x3160 fs/bcachefs/fs-io-direct.c:598
bch2_write_iter+0x194/0x2480 fs/bcachefs/fs-io-buffered.c:1041
do_iter_readv_writev+0x600/0x880
vfs_writev+0x376/0xba0 fs/read_write.c:1064
do_pwritev fs/read_write.c:1165 [inline]
__do_sys_pwritev2 fs/read_write.c:1224 [inline]
__se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1215
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: 0033:0x7f75b057def9
RSP: 002b:00007f75affff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f75b0736130 RCX: 00007f75b057def9
RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000005
RBP: 00007f75b05f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f75b0736130 R15: 00007ffef999bca8
Showing all locks held in the system:
3 locks held by kworker/0:1/9:
2 locks held by kworker/u8:0/11:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90000107d00 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90000107d00 ((reaper_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
3 locks held by kworker/u8:1/12:
#0: ffff88814b29b948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88814b29b948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90000117d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90000117d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff8fcb9048 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196
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/u8:2/35:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90000ab7d00 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90000ab7d00 (connector_reaper_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
2 locks held by kworker/u8:3/51:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90000bc7d00 ((quota_release_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90000bc7d00 ((quota_release_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
2 locks held by getty/4977:
#0: ffff88802f34e0a0 (&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
5 locks held by syz.3.4/5343:
#0: ffff888063b98420 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88804f6088a8 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#1: ffff88804f6088a8 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: do_truncate+0x20c/0x310 fs/open.c:63
#2: ffff88804fb00a18 (&c->snapshot_create_lock){.+.+}-{3:3}, at: bch2_truncate+0x16c/0x2c0 fs/bcachefs/io_misc.c:290
#3: ffff88804fb042c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#3: ffff88804fb042c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#3: ffff88804fb042c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7de/0xd20 fs/bcachefs/btree_iter.c:3200
#4: ffff88804fb26690 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1197
3 locks held by syz.3.4/5397:
#0: ffff888024eefeb8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x320 fs/file.c:1187
#1: ffff888063b98420 (sb_writers#17){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2930 [inline]
#1: ffff888063b98420 (sb_writers#17){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679
#2: ffff88804f6088a8 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#2: ffff88804f6088a8 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: bch2_direct_write+0x245/0x3160 fs/bcachefs/fs-io-direct.c:598
2 locks held by syz.3.4/5398:
#0: ffff888063b98420 (sb_writers#17){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2930 [inline]
#0: ffff888063b98420 (sb_writers#17){.+.+}-{0:0}, at: vfs_writev+0x2d1/0xba0 fs/read_write.c:1062
#1: ffff88804f6088a8 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#1: ffff88804f6088a8 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: bch2_direct_write+0x245/0x3160 fs/bcachefs/fs-io-direct.c:598
3 locks held by bch-reclaim/loo/5357:
1 lock held by syz-executor/6392:
#0: ffff88807edc20e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807edc20e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807edc20e0 (&type->s_umount_key#31){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
3 locks held by syz-executor/6605:
#0: ffffffff8fcb9048 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcb9048 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643
#1: ffff88807f795428 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_open+0x22d/0x420 drivers/net/wireguard/device.c:50
#2: ffffffff8e93d478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#2: ffffffff8e93d478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
2 locks held by syz.2.139/6721:
#0: ffff88807c8fc0e0 (&type->s_umount_key#55/1){+.+.}-{3:3}, at: alloc_super+0x221/0x9d0 fs/super.c:344
#1: ffffffff8e9f8a08 (lock#3){+.+.}-{3:3}, at: __lru_add_drain_all+0x66/0x560 mm/swap.c:843
2 locks held by dhcpcd/6743:
#0: ffff888069f6e258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1609 [inline]
#0: ffff888069f6e258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3266
#1: ffffffff8e93d478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#1: ffffffff8e93d478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-08068-g1ec6d097897a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5357 Comm: bch-reclaim/loo Not tainted 6.11.0-syzkaller-08068-g1ec6d097897a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:194 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:217
Code: 80 d7 03 00 65 8b 15 e0 22 6f 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 <83> fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc
RSP: 0018:ffffc900041c74f8 EFLAGS: 00000246
RAX: ffffffff841e60c4 RBX: dffffc0000000000 RCX: ffff8880120f9e00
RDX: 0000000000000000 RSI: ffffffff8c6000e0 RDI: ffff888028ef8000
RBP: ffffc900041c7950 R08: ffffffff901b4def R09: 1ffffffff20369bd
R10: dffffc0000000000 R11: fffffbfff20369be R12: ffff88804fb04680
R13: ffffc900041c7b10 R14: ffff888028ef8000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f257a5bd000 CR3: 000000000e734000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bch2_btree_write_buffer_flush_locked+0xc4/0x59f0 fs/bcachefs/btree_write_buffer.c:270
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+0x77d/0xe40 fs/bcachefs/journal_reclaim.c:697
bch2_journal_reclaim_thread+0x174/0x560 fs/bcachefs/journal_reclaim.c:739
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