INFO: task syz-executor.1:9565 blocked for more than 143 seconds.
Not tainted 6.6.0-rc3-syzkaller-00096-g71e58659bfc0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26896 pid:9565 ppid:5094 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x5a10 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
io_schedule+0xbe/0x130 kernel/sched/core.c:9026
folio_wait_bit_common+0x3dc/0x9c0 mm/filemap.c:1301
folio_lock include/linux/pagemap.h:1042 [inline]
clean_bdev_aliases+0x56b/0x610 fs/buffer.c:1725
clean_bdev_bh_alias include/linux/buffer_head.h:222 [inline]
__block_write_begin_int+0x8d6/0x14d0 fs/buffer.c:2118
iomap_write_begin+0x5be/0x1800 fs/iomap/buffered-io.c:774
iomap_write_iter fs/iomap/buffered-io.c:909 [inline]
iomap_file_buffered_write+0x3d6/0x9a0 fs/iomap/buffered-io.c:970
blkdev_buffered_write block/fops.c:634 [inline]
blkdev_write_iter+0x4f5/0xc90 block/fops.c:684
call_write_iter include/linux/fs.h:1956 [inline]
do_iter_readv_writev+0x21e/0x3c0 fs/read_write.c:735
do_iter_write+0x17f/0x830 fs/read_write.c:860
vfs_iter_write+0x7a/0xb0 fs/read_write.c:901
iter_file_splice_write+0x698/0xbf0 fs/splice.c:736
do_splice_from fs/splice.c:933 [inline]
direct_splice_actor+0x118/0x180 fs/splice.c:1142
splice_direct_to_actor+0x347/0xa30 fs/splice.c:1088
do_splice_direct+0x1af/0x280 fs/splice.c:1194
do_sendfile+0xb88/0x1390 fs/read_write.c:1254
__do_sys_sendfile64 fs/read_write.c:1322 [inline]
__se_sys_sendfile64 fs/read_write.c:1308 [inline]
__x64_sys_sendfile64+0x1d6/0x220 fs/read_write.c:1308
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7e2227cae9
RSP: 002b:00007f7e22f760c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f7e2239c120 RCX: 00007f7e2227cae9
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007f7e222c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0100000000000042 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f7e2239c120 R15: 00007f7e224bfa48
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/4796:
#0: ffff88814a7160a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
2 locks held by kworker/u4:4/8299:
#0: ffff8880b983c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:566 [inline]
#0: ffff8880b983c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:551
#1: ffff8880b9828888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:999
2 locks held by syz-executor.0/11311:
1 lock held by syz-executor.3/11313:
2 locks held by syz-executor.4/11314:
1 lock held by syz-executor.5/11323:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc3-syzkaller-00096-g71e58659bfc0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1299 Comm: kworker/u4:10 Not tainted 6.6.0-rc3-syzkaller-00096-g71e58659bfc0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:check_preemption_disabled+0x25/0xe0 lib/smp_processor_id.c:56
Code: 0f 1f 44 00 00 41 54 55 53 48 83 ec 08 65 8b 1d 7d 2c c5 75 65 8b 05 72 2c c5 75 a9 ff ff ff 7f 74 0b 48 83 c4 08 89 d8 5b 5d <41> 5c c3 9c 58 f6 c4 02 74 ee 65 48 8b 04 25 c0 bc 03 00 f6 40 2f
RSP: 0018:ffffc90005977b90 EFLAGS: 00000292
RAX: 0000000000000000 RBX: ffff88807d4ac580 RCX: 0000000000000000
RDX: ffff8880202a5940 RSI: ffffffff8ae930a0 RDI: ffffffff8ae930e0
RBP: 00000000000000b0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880424fbfc0
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002008a030 CR3: 000000003a60b000 CR4: 00000000003506f0
Call Trace:
rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
rcu_is_watching+0x12/0xb0 kernel/rcu/tree.c:699
rcu_read_lock include/linux/rcupdate.h:750 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xc89/0x10e0 net/batman-adv/network-coding.c:719
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
vkms_vblank_simulate: vblank timer overrun