INFO: task syz.1.1714:11666 blocked for more than 143 seconds.
Not tainted 6.16.0-syzkaller-11105-ga6923c06a3b2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1714 state:D stack:16072 pid:11666 tgid:11665 ppid:10944 task_flags:0x440140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 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+0x17a/0x580 mm/readahead.c:160
page_cache_ra_order+0x8ca/0xd40 mm/readahead.c:512
filemap_get_pages+0x43c/0x1ea0 mm/filemap.c:2603
filemap_splice_read+0x4fc/0xbc0 mm/filemap.c:2991
do_splice_read fs/splice.c:979 [inline]
splice_file_to_pipe+0x273/0x440 fs/splice.c:1289
do_sendfile+0x475/0x7e0 fs/read_write.c:1376
__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: 0033:0x7fe97c38eb69
RSP: 002b:00007fe97a1f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fe97c5b5fa0 RCX: 00007fe97c38eb69
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 00007fe97c411df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000065 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe97c5b5fa0 R15: 00007ffc271181b8
INFO: task syz.1.1714:11730 blocked for more than 143 seconds.
Not tainted 6.16.0-syzkaller-11105-ga6923c06a3b2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1714 state:D stack:27592 pid:11730 tgid:11665 ppid:10944 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
io_schedule+0x80/0xd0 kernel/sched/core.c:7903
folio_wait_bit_common+0x6b0/0xb90 mm/filemap.c:1317
__folio_lock mm/filemap.c:1675 [inline]
folio_lock include/linux/pagemap.h:1133 [inline]
__filemap_get_folio+0x139/0xaf0 mm/filemap.c:1929
filemap_lock_folio include/linux/pagemap.h:812 [inline]
__bch2_truncate_folio+0x11d/0x1a30 fs/bcachefs/fs-io.c:291
bch2_truncate_folio fs/bcachefs/fs-io.c:393 [inline]
bchfs_truncate+0x5de/0xc20 fs/bcachefs/fs-io.c:483
notify_change+0xb36/0xe40 fs/attr.c:552
do_truncate+0x1a4/0x220 fs/open.c:68
do_ftruncate+0x489/0x540 fs/open.c:195
do_sys_ftruncate fs/open.c:210 [inline]
__do_sys_ftruncate fs/open.c:215 [inline]
__se_sys_ftruncate fs/open.c:213 [inline]
__x64_sys_ftruncate+0x92/0xf0 fs/open.c:213
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: 0033:0x7fe97c38eb69
RSP: 002b:00007fe97a1d5038 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007fe97c5b6080 RCX: 00007fe97c38eb69
RDX: 0000000000000000 RSI: 0000000000000085 RDI: 0000000000000004
RBP: 00007fe97c411df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fe97c5b6080 R15: 00007ffc271181b8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e139e60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e139e60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e139e60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
3 locks held by kworker/u8:2/36:
#0: ffff8880b8739f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:636
#1: ffff8880b8724008 (per_cpu_ptr(&psi_seq, cpu)){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880 kernel/sched/psi.c:937
#2: ffffffff8e139e60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#2: ffffffff8e139e60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#2: ffffffff8e139e60 (rcu_read_lock){....}-{1:3}, at: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
#2: ffffffff8e139e60 (rcu_read_lock){....}-{1:3}, at: batadv_nc_worker+0xd2/0x610 net/batman-adv/network-coding.c:719
2 locks held by getty/5622:
#0: ffff88814d9870a0 (&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+0x43e/0x1400 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/5844:
#0: ffff8880569e8868 (&pipe->mutex){+.+.}-{4:4}, at: pipe_release+0x48/0x330 fs/pipe.c:727
2 locks held by syz-executor/7662:
2 locks held by syz.1.1714/11666:
#0: ffff8880569e8868 (&pipe->mutex){+.+.}-{4:4}, at: splice_file_to_pipe+0x2e/0x440 fs/splice.c:1286
#1: ffff888045480a80 (mapping.invalidate_lock#14){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
#1: ffff888045480a80 (mapping.invalidate_lock#14){.+.+}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488
2 locks held by syz.1.1714/11730:
#0: ffff88804028a428 (sb_writers#30){.+.+}-{0:0}, at: do_ftruncate+0x42a/0x540 fs/open.c:194
#1: ffff8880454808e0 (&sb->s_type->i_mutex_key#36){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:874 [inline]
#1: ffff8880454808e0 (&sb->s_type->i_mutex_key#36){+.+.}-{4:4}, at: do_truncate+0x171/0x220 fs/open.c:63
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller-11105-ga6923c06a3b2 #0 PREEMPT(full)
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:307 [inline]
watchdog+0xf93/0xfe0 kernel/hung_task.c:470
kthread+0x711/0x8a0 kernel/kthread.c:464
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: 36 Comm: kworker/u8:2 Not tainted 6.16.0-syzkaller-11105-ga6923c06a3b2 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: bat_events batadv_mcast_mla_update
RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5601 [inline]
RIP: 0010:lock_is_held_type+0xa8/0x190 kernel/locking/lockdep.c:5940
Code: 28 07 41 83 bd e8 0a 00 00 00 7e 48 4c 89 eb 48 81 c3 f0 0a 00 00 45 31 ff 49 83 ff 31 73 24 48 89 df 4c 89 f6 e8 78 02 00 00 <85> c0 75 2a 49 ff c7 49 63 85 e8 0a 00 00 48 83 c3 28 49 39 c7 7c
RSP: 0018:ffffc90000ac7828 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8881436d2940 RCX: 17dc2b321d46ff00
RDX: 0000000000000000 RSI: ffffffff8f5327c8 RDI: ffff8881436d2940
RBP: 00000000ffffffff R08: 0000000000000000 R09: ffffffff8b43d459
R10: 0000000000000009 R11: ffffffff81ac34b0 R12: 0000000000000246
R13: ffff8881436d1e00 R14: ffffffff8f5327c8 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff888125c2a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33218ff8 CR3: 000000005373e000 CR4: 0000000000350ef0
Call Trace:
lock_is_held include/linux/lockdep.h:249 [inline]
lockdep_rtnl_is_held+0x1b/0x40 net/core/rtnetlink.c:182
__in6_dev_get include/net/addrconf.h:347 [inline]
batadv_mcast_mla_meshif_get_ipv6 net/batman-adv/multicast.c:448 [inline]
batadv_mcast_mla_meshif_get net/batman-adv/multicast.c:533 [inline]
__batadv_mcast_mla_update net/batman-adv/multicast.c:909 [inline]
batadv_mcast_mla_update+0x1529/0x3640 net/batman-adv/multicast.c:946
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245