INFO: task syz.4.109:6979 blocked for more than 143 seconds.
Tainted: G W 6.17.0-rc1-syzkaller-00224-g8d561baae505 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.109 state:D stack:17448 pid:6979 tgid:6976 ppid:5830 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
io_schedule+0x81/0xe0 kernel/sched/core.c:7903
folio_wait_bit_common+0x6b5/0xb90 mm/filemap.c:1317
folio_lock include/linux/pagemap.h:1133 [inline]
bch2_mark_pagecache_reserved+0x33d/0xbb0 fs/bcachefs/fs-io-pagecache.c:314
__bchfs_fallocate+0x1284/0x1870 fs/bcachefs/fs-io.c:733
bchfs_fallocate+0x33f/0x680 fs/bcachefs/fs-io.c:789
bch2_fallocate_dispatch+0x28d/0x410 fs/bcachefs/fs-io.c:836
vfs_fallocate+0x672/0x7f0 fs/open.c:342
ksys_fallocate fs/open.c:366 [inline]
__do_sys_fallocate fs/open.c:371 [inline]
__se_sys_fallocate fs/open.c:369 [inline]
__x64_sys_fallocate+0xc0/0x110 fs/open.c:369
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe53280ebe9
RSP: 002b:00007fe530a6e038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fe532a35fa0 RCX: 00007fe53280ebe9
RDX: 0000000000000005 RSI: 0000000000000001 RDI: 0000000000000008
RBP: 00007fe532891e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000007fff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe532a36038 R14: 00007fe532a35fa0 R15: 00007fff0bba64e8
INFO: task syz.4.109:7007 blocked for more than 143 seconds.
Tainted: G W 6.17.0-rc1-syzkaller-00224-g8d561baae505 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.109 state:D stack:26440 pid:7007 tgid:6976 ppid:5830 task_flags:0x440040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
__bch2_two_state_lock+0x1ea/0x370 fs/bcachefs/two_state_shared_lock.c:7
bch2_two_state_lock fs/bcachefs/two_state_shared_lock.h:55 [inline]
bch2_readahead+0x94f/0x1100 fs/bcachefs/fs-io-buffered.c:296
read_pages+0x177/0x580 mm/readahead.c:160
page_cache_ra_unbounded+0x2d3/0x740 mm/readahead.c:264
filemap_get_pages+0x443/0x1df0 mm/filemap.c:2603
filemap_splice_read+0x587/0xc60 mm/filemap.c:2991
do_splice_read fs/splice.c:979 [inline]
splice_direct_to_actor+0x4b1/0xcd0 fs/splice.c:1083
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x187/0x270 fs/splice.c:1227
do_sendfile+0x4ec/0x7f0 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1431 [inline]
__se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe53280ebe9
RSP: 002b:00007fe530a4d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fe532a36090 RCX: 00007fe53280ebe9
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000005
RBP: 00007fe532891e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000100001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe532a36128 R14: 00007fe532a36090 R15: 00007fff0bba64e8
INFO: task syz.4.109:7022 blocked for more than 143 seconds.
Tainted: G W 6.17.0-rc1-syzkaller-00224-g8d561baae505 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.109 state:D stack:29352 pid:7022 tgid:6976 ppid:5830 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
rt_mutex_schedule+0x77/0xf0 kernel/sched/core.c:7339
rt_mutex_slowlock_block kernel/locking/rtmutex.c:1647 [inline]
__rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]
__rt_mutex_slowlock_locked+0x1e04/0x25e0 kernel/locking/rtmutex.c:1760
rt_mutex_slowlock+0xb5/0x160 kernel/locking/rtmutex.c:1800
__rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]
rwbase_write_lock+0x14f/0x750 kernel/locking/rwbase_rt.c:244
inode_lock include/linux/fs.h:869 [inline]
bch2_fallocate_dispatch+0x111/0x410 fs/bcachefs/fs-io.c:827
vfs_fallocate+0x672/0x7f0 fs/open.c:342
ksys_fallocate fs/open.c:366 [inline]
__do_sys_fallocate fs/open.c:371 [inline]
__se_sys_fallocate fs/open.c:369 [inline]
__x64_sys_fallocate+0xc0/0x110 fs/open.c:369
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe53280ebe9
RSP: 002b:00007fe530a2c038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fe532a36180 RCX: 00007fe53280ebe9
RDX: 0000000000000005 RSI: 0000000000000001 RDI: 0000000000000004
RBP: 00007fe532891e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000007fff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe532a36218 R14: 00007fe532a36180 R15: 00007fff0bba64e8
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Tainted: G W 6.17.0-rc1-syzkaller-00224-g8d561baae505 #0 PREEMPT_{RT,(full)}
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
watchdog+0xf93/0xfe0 kernel/hung_task.c:491
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 7002 Comm: bch-rebalance/l Tainted: G W 6.17.0-rc1-syzkaller-00224-g8d561baae505 #0 PREEMPT_{RT,(full)}
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0xa0 kernel/kcov.c:314
Code: 89 74 0a 18 48 89 44 0a 20 e9 04 60 3b 09 cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 08 b0 f5 91 65 44 8b 05 27 50 37 10 41 81 e0 00 00
RSP: 0018:ffffc90004136cb0 EFLAGS: 00000293
RAX: ffffffff844b34a1 RBX: ffff888060d2c800 RCX: ffff888025258000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffff888025258000 R09: 0000000000000002
R10: 0000000000000100 R11: 0000000000000003 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffffff842177a4 R15: ffff88805e8c037a
FS: 0000000000000000(0000) GS:ffff8881268c5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe0a294f19 CR3: 0000000069e64000 CR4: 00000000003526f0
Call Trace:
six_unlock_ip+0x31/0x430 fs/bcachefs/six.c:614
six_unlock_type fs/bcachefs/six.h:312 [inline]
btree_node_unlock+0xec/0x240 fs/bcachefs/btree_locking.h:144
__bch2_btree_path_unlock fs/bcachefs/btree_locking.h:166 [inline]
__bch2_trans_unlock fs/bcachefs/btree_locking.c:770 [inline]
bch2_trans_unlock+0x36f/0x580 fs/bcachefs/btree_locking.c:853
bch2_data_update_init+0x36a4/0x4910 fs/bcachefs/data_update.c:989
bch2_move_extent+0x690/0x1bb0 fs/bcachefs/move.c:376
do_rebalance_extent+0x8f0/0x1fe0 fs/bcachefs/rebalance.c:441
do_rebalance fs/bcachefs/rebalance.c:578 [inline]
bch2_rebalance_thread+0x1260/0x1f60 fs/bcachefs/rebalance.c:626
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245