INFO: task syz.3.667:12434 blocked for more than 143 seconds.
Not tainted 6.14.0-rc1-syzkaller-00081-gbb066fe812d6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.667 state:D stack:12960 pid:12434 tgid:12433 ppid:11657 task_flags:0x440140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
__bch2_two_state_lock+0x229/0x2c0 fs/bcachefs/two_state_shared_lock.c:7
bch2_two_state_lock fs/bcachefs/two_state_shared_lock.h:55 [inline]
bch2_readahead+0x9e1/0x1240 fs/bcachefs/fs-io-buffered.c:272
read_pages+0x179/0x570 mm/readahead.c:161
page_cache_ra_order+0xa36/0xca0 mm/readahead.c:516
filemap_get_pages+0x59a/0x1fb0 mm/filemap.c:2580
filemap_splice_read+0x68e/0xef0 mm/filemap.c:2971
do_splice_read fs/splice.c:985 [inline]
splice_direct_to_actor+0x4af/0xc80 fs/splice.c:1089
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x289/0x3e0 fs/splice.c:1233
do_sendfile+0x564/0x8a0 fs/read_write.c:1363
__do_sys_sendfile64 fs/read_write.c:1418 [inline]
__se_sys_sendfile64+0x100/0x1e0 fs/read_write.c:1410
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: 0033:0x7f6246f8cde9
RSP: 002b:00007f6247e81038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f62471a5fa0 RCX: 00007f6246f8cde9
RDX: 0000200000000080 RSI: 0000000000000007 RDI: 0000000000000007
RBP: 00007f624700e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000007f03 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f62471a5fa0 R15: 00007fffd5d47118
INFO: task syz.3.667:12467 blocked for more than 144 seconds.
Not tainted 6.14.0-rc1-syzkaller-00081-gbb066fe812d6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.667 state:D stack:24096 pid:12467 tgid:12433 ppid:11657 task_flags:0x400040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
io_schedule+0x8d/0x110 kernel/sched/core.c:7689
folio_wait_bit_common+0x839/0xee0 mm/filemap.c:1318
__folio_lock mm/filemap.c:1665 [inline]
folio_lock include/linux/pagemap.h:1163 [inline]
__filemap_get_folio+0x14e/0xae0 mm/filemap.c:1918
folio_hole_offset fs/bcachefs/fs-io-pagecache.c:752 [inline]
bch2_seek_pagecache_hole+0xc1/0x7a0 fs/bcachefs/fs-io-pagecache.c:789
bch2_clamp_data_hole+0x8f/0x180 fs/bcachefs/fs-io-pagecache.c:804
__bchfs_fallocate+0x1159/0x2770 fs/bcachefs/fs-io.c:670
bchfs_fallocate+0x31b/0x730 fs/bcachefs/fs-io.c:762
bch2_fallocate_dispatch+0x3ac/0x540 fs/bcachefs/fs-io.c:809
vfs_fallocate+0x623/0x7a0 fs/open.c:338
ksys_fallocate fs/open.c:362 [inline]
__do_sys_fallocate fs/open.c:367 [inline]
__se_sys_fallocate fs/open.c:365 [inline]
__x64_sys_fallocate+0xbc/0x110 fs/open.c:365
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: 0033:0x7f6246f8cde9
RSP: 002b:00007f6247e3f038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f62471a6160 RCX: 00007f6246f8cde9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f624700e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008000c62 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f62471a6160 R15: 00007fffd5d47118
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e9387e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e9387e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e9387e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
2 locks held by getty/5575:
#0: ffff8880318ce0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036bb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by kworker/u8:16/6225:
#0: ffff8880b863e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
#1: ffff8880b8628948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
#2: ffffffff9a68e6f0 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:1088 [inline]
#2: ffffffff9a68e6f0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0x234/0x580 lib/debugobjects.c:1129
5 locks held by kworker/u8:17/6226:
#0: ffff8880b863e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
#1: ffff8880b8628948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
#2: ffff8880b862a398 (&base->lock){-.-.}-{2:2}, at: lock_timer_base kernel/time/timer.c:1046 [inline]
#2: ffff8880b862a398 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x24a/0x10e0 kernel/time/timer.c:1127
#3: ffffffff9a5b5df0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x17f/0x580 lib/debugobjects.c:818
#4: ffffffff9a5ee598 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:1088 [inline]
#4: ffffffff9a5ee598 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0x234/0x580 lib/debugobjects.c:1129
1 lock held by syz.3.667/12434:
#0: ffff8880556bc740 (mapping.invalidate_lock#10){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:920 [inline]
#0: ffff8880556bc740 (mapping.invalidate_lock#10){.+.+}-{4:4}, at: page_cache_ra_order+0x45d/0xca0 mm/readahead.c:492
3 locks held by syz.3.667/12467:
#0: ffff888065da0420 (sb_writers#29){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3023 [inline]
#0: ffff888065da0420 (sb_writers#29){.+.+}-{0:0}, at: vfs_fallocate+0x59d/0x7a0 fs/open.c:337
#1: ffff8880556bc5a0 (&sb->s_type->i_mutex_key#33){++++}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline]
#1: ffff8880556bc5a0 (&sb->s_type->i_mutex_key#33){++++}-{4:4}, at: bch2_fallocate_dispatch+0x1e2/0x540 fs/bcachefs/fs-io.c:800
#2: ffff888061884378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:164 [inline]
#2: ffff888061884378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:256 [inline]
#2: ffff888061884378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7e4/0xd30 fs/bcachefs/btree_iter.c:3377
1 lock held by syz-executor/15666:
#0: ffffffff8e93dcb8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:334 [inline]
#0: ffffffff8e93dcb8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:996
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc1-syzkaller-00081-gbb066fe812d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
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: 12266 Comm: kworker/0:9 Not tainted 6.14.0-rc1-syzkaller-00081-gbb066fe812d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: rcu_gp process_srcu
RIP: 0010:delay_tsc+0x5c/0xe0 arch/x86/lib/delay.c:79
Code: 90 48 89 d5 48 c1 e5 20 48 09 c5 48 29 dd 4c 39 f5 73 67 bf 01 00 00 00 e8 41 da a0 f5 65 8b 05 32 22 17 74 85 c0 74 2f f3 90 01 00 00 00 e8 8a d8 a0 f5 e8 85 53 01 00 41 39 c7 75 20 0f 01
RSP: 0018:ffffc90003e5f988 EFLAGS: 00000286
RAX: 0000000080000000 RBX: 00000140c6ac7782 RCX: 0000000000000001
RDX: 0000000000000140 RSI: ffffffff8c5fb5e0 RDI: 0000000000000001
RBP: 0000000000001695 R08: ffff8880b8746487 R09: 1ffff110170e8c90
R10: dffffc0000000000 R11: ffffffff8becb280 R12: ffffffff9a43e648
R13: 0000000000000002 R14: 0000000000002af9 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c7728a3950 CR3: 0000000032f6a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
udelay include/asm-generic/delay.h:64 [inline]
try_check_zero+0x43b/0x4a0 kernel/rcu/srcutree.c:1112
srcu_advance_state kernel/rcu/srcutree.c:1742 [inline]
process_srcu+0x242/0x12e0 kernel/rcu/srcutree.c:1851
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244