INFO: task syz.4.112:5657 blocked for more than 143 seconds.
Not tainted 6.11.0-syzkaller-05591-g2a17bb8c204f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.112 state:D stack:27312 pid:5657 tgid:5606 ppid:5226 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
rwsem_down_write_slowpath+0xeeb/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_write_iter+0x13a/0x2480 fs/bcachefs/fs-io-buffered.c:1045
new_sync_write fs/read_write.c:590 [inline]
vfs_write+0xa6f/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: 0033:0x7f19c777def9
RSP: 002b:00007f19c85a7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f19c7936058 RCX: 00007f19c777def9
RDX: 0000000000000060 RSI: 0000000020000300 RDI: 0000000000000004
RBP: 00007f19c77f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f19c7936058 R15: 00007ffeee788858
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e938b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e938b60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e938b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6701
3 locks held by kworker/u8:4/62:
#0: ffff8880b893e998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
#1: ffffc900015dfd00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc900015dfd00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff9a62a7c0 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:978 [inline]
#2: ffffffff9a62a7c0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0x234/0x580 lib/debugobjects.c:1019
2 locks held by getty/4988:
#0: ffff88802e8690a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000311b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5228:
#0: ffffffff8e93dfc0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4561
5 locks held by syz.4.112/5607:
#0: ffff88807cd76420 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88807a4a9768 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#1: ffff88807a4a9768 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: do_truncate+0x20c/0x310 fs/open.c:63
#2: ffff888058d80a18 (&c->snapshot_create_lock){.+.+}-{3:3}, at: bch2_truncate+0x16c/0x2c0 fs/bcachefs/io_misc.c:290
#3: ffff888058d842c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#3: ffff888058d842c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#3: ffff888058d842c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7de/0xd20 fs/bcachefs/btree_iter.c:3200
#4: ffff888058da6690 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1197
3 locks held by syz.4.112/5657:
#0: ffff88807bd0c478 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x320 fs/file.c:1187
#1: ffff88807cd76420 (sb_writers#15){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2930 [inline]
#1: ffff88807cd76420 (sb_writers#15){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679
#2: ffff88807a4a9768 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#2: ffff88807a4a9768 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: bch2_write_iter+0x13a/0x2480 fs/bcachefs/fs-io-buffered.c:1045
2 locks held by bch-reclaim/loo/5647:
1 lock held by syz.0.1181/8720:
#0: ffff88805c4809c0 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#0: ffff88805c4809c0 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: ocfs2_file_write_iter+0x467/0x1f50 fs/ocfs2/file.c:2388
3 locks held by syz.0.1181/8721:
#0: ffff88807b450420 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88805c4889c0 (&type->i_mutex_dir_key#11/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
#1: ffff88805c4889c0 (&type->i_mutex_dir_key#11/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3161 [inline]
#1: ffff88805c4889c0 (&type->i_mutex_dir_key#11/1){+.+.}-{3:3}, at: do_renameat2+0x62c/0x13f0 fs/namei.c:5105
#2: ffff88805c4809c0 (&sb->s_type->i_mutex_key#27/4
){+.+.}-{3:3}, at: vfs_rename+0x6a2/0xf00 fs/namei.c:4984
1 lock held by syz.2.1183/8697:
#0: ffffffff8e93dfc0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4561
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-05591-g2a17bb8c204f #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+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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: 62 Comm: kworker/u8:4 Not tainted 6.11.0-syzkaller-05591-g2a17bb8c204f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_release kernel/locking/lockdep.c:5506 [inline]
RIP: 0010:lock_release+0x2ac/0xa30 kernel/locking/lockdep.c:5843
Code: 31 4e 0a 89 5c 24 44 89 da 85 c0 0f 84 f0 01 00 00 4d 85 f6 0f 84 1b 03 00 00 49 8d 5e 24 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 0f 85 2a 05 00 00 83 3b 00 0f 85 2d 04 00 00 4d 8d 66 20 4c
RSP: 0018:ffffc900015df9a0 EFLAGS: 00000017
RAX: 0000000000000000 RBX: ffff888022aee554 RCX: ffffc900015dfa03
RDX: 0000000000000002 RSI: ffffffff8e938b60 RDI: ffff888022aee530
RBP: ffffc900015dfad8 R08: ffffffff901c022f R09: 1ffffffff2038045
R10: dffffc0000000000 R11: fffffbfff2038046 R12: 000000000000000a
R13: 0000000000000002 R14: ffff888022aee530 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c356da6 CR3: 000000000e734000 CR4: 0000000000350ef0
Call Trace:
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
batadv_nc_process_nc_paths+0x2f0/0x3a0 net/batman-adv/network-coding.c:699
batadv_nc_worker+0x42a/0x610 net/batman-adv/network-coding.c:728
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244