INFO: task syz.0.41:5600 blocked for more than 143 seconds.
Not tainted 6.11.0-syzkaller-07262-g839c4f596f89 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.41 state:D stack:27312 pid:5600 tgid:5541 ppid:5222 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 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+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: 0033:0x7f36eff7def9
RSP: 002b:00007f36ef9de038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f36f0136058 RCX: 00007f36eff7def9
RDX: 0000000000000060 RSI: 0000000020000300 RDI: 0000000000000005
RBP: 00007f36efff0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f36f0136058 R15: 00007ffec7865d98
Showing all locks held in the system:
3 locks held by kworker/u8:0/11:
#0: ffff8880b883e958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
#1: ffff8880b8828948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:989
#2: ffff8880b893e958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
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
2 locks held by getty/4980:
#0: ffff88814b3b50a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
5 locks held by syz.0.41/5542:
#0: ffff88807b84a420 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff888058e50148 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#1: ffff888058e50148 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}, at: do_truncate+0x20c/0x310 fs/open.c:63
#2: ffff888055080a18 (&c->snapshot_create_lock){.+.+}-{3:3}, at: bch2_truncate+0x16c/0x2c0 fs/bcachefs/io_misc.c:290
#3: ffff8880550842c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#3: ffff8880550842c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#3: ffff8880550842c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7de/0xd20 fs/bcachefs/btree_iter.c:3200
#4: ffff8880550a6690 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1197
3 locks held by syz.0.41/5600:
#0: ffff88805c2c29b8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x320 fs/file.c:1187
#1: ffff88807b84a420 (sb_writers#22){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2930 [inline]
#1: ffff88807b84a420 (sb_writers#22){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679
#2: ffff888058e50148 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#2: ffff888058e50148 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}, at: bch2_write_iter+0x13a/0x2480 fs/bcachefs/fs-io-buffered.c:1045
3 locks held by bch-reclaim/loo/5586:
1 lock held by syz-executor/7241:
#0: ffffffff8e93e0f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#0: ffffffff8e93e0f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
2 locks held by syz.1.276/7612:
1 lock held by syz.2.278/7617:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-07262-g839c4f596f89 #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: 7617 Comm: syz.2.278 Not tainted 6.11.0-syzkaller-07262-g839c4f596f89 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__lock_acquire+0xec1/0x2050
Code: 01 c1 29 d0 89 d6 c1 c6 08 31 c6 01 ca 29 f1 89 f3 c1 c3 10 31 cb 01 d6 29 da 89 dd c1 c5 13 31 d5 01 f3 29 ee 01 eb c1 c5 04 <31> f5 48 c1 e5 20 48 c7 c0 70 62 1b 90 48 c1 e8 03 0f b6 04 38 84
RSP: 0018:ffffc900094c72b0 EFLAGS: 00000087
RAX: 00000000001048e2 RBX: 00000000cf58201d RCX: 0000000010586bbd
RDX: 00000000bba9f2dc RSI: 00000000541afa23 RDI: dffffc0000000000
RBP: 00000000b7bd0f09 R08: ffffffff94219887 R09: 1ffffffff2843310
R10: dffffc0000000000 R11: fffffbfff2843311 R12: 0000000000000001
R13: ffff888024bc46d8 R14: 0000000000004023 R15: ffff888024bc4700
FS: 00007fafb82466c0(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7536bff000 CR3: 00000000502b6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
percpu_ref_put_many include/linux/percpu-refcount.h:330 [inline]
percpu_ref_put+0x36/0x180 include/linux/percpu-refcount.h:351
__mem_cgroup_uncharge_folios+0xdf/0x1c0 mm/memcontrol.c:4682
mem_cgroup_uncharge_folios include/linux/memcontrol.h:702 [inline]
folios_put_refs+0x766/0x860 mm/swap.c:1038
folio_batch_release include/linux/pagevec.h:101 [inline]
shmem_undo_range+0x6de/0x1df0 mm/shmem.c:1023
shmem_truncate_range mm/shmem.c:1132 [inline]
shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1260
evict+0x4e8/0x9b0 fs/inode.c:731
__dentry_kill+0x20d/0x630 fs/dcache.c:615
dput+0x19f/0x2b0 fs/dcache.c:857
__fput+0x5d2/0x880 fs/file_table.c:439
__do_sys_close fs/open.c:1565 [inline]
__se_sys_close fs/open.c:1550 [inline]
__x64_sys_close+0x7f/0x110 fs/open.c:1550
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: 0033:0x7fafb737cb8a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 13 8c 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 73 8c 02 00 8b 44 24
RSP: 002b:00007fafb8245e00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007fafb737cb8a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000009600
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000006
R13: 00007fafb8245ef0 R14: 00007fafb8245eb0 R15: 00007fafaca00000