INFO: task syz-executor.1:19071 blocked for more than 143 seconds.
Not tainted 6.6.0-rc3-next-20230927-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:25360 pid:19071 ppid:5085 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5365 [inline]
__schedule+0xee1/0x5a00 kernel/sched/core.c:6676
__schedule_loop kernel/sched/core.c:6753 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6768
io_schedule+0xbe/0x130 kernel/sched/core.c:8988
folio_wait_bit_common+0x3dc/0x9c0 mm/filemap.c:1299
folio_lock include/linux/pagemap.h:1014 [inline]
clean_bdev_aliases+0x56b/0x610 fs/buffer.c:1732
clean_bdev_bh_alias include/linux/buffer_head.h:222 [inline]
__block_write_begin_int+0x8d6/0x14d0 fs/buffer.c:2125
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:1963 [inline]
do_iter_readv_writev+0x21e/0x3c0 fs/read_write.c:735
do_iter_write+0x17f/0x820 fs/read_write.c:860
vfs_iter_write+0x7a/0xb0 fs/read_write.c:901
iter_file_splice_write+0x698/0xc00 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:51 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2a7a27cae9
RSP: 002b:00007f2a78ddd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f2a7a39c120 RCX: 00007f2a7a27cae9
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007f2a7a2c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0100000000000042 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f2a7a39c120 R15: 00007fff5d8264f8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cbab160 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8cbab160 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8cbab160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/4810:
#0: ffff88814c2400a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
7 locks held by kworker/u4:22/8648:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc3-next-20230927-syzkaller #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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8648 Comm: kworker/u4:22 Not tainted 6.6.0-rc3-next-20230927-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:405 [inline]
RIP: 0010:batadv_nc_worker+0x8f8/0x10e0 net/batman-adv/network-coding.c:719
Code: 85 2c 03 00 00 e8 88 94 78 f7 83 c5 01 e8 50 22 62 f7 48 c7 c7 60 b1 ba 8c 48 8d 35 00 00 00 00 e8 3d fd 58 f7 48 8b 44 24 48 <48> c1 e8 03 42 0f b6 04 30 84 c0 74 08 3c 03 0f 8e a1 07 00 00 48
RSP: 0018:ffffc900150e7bb8 EFLAGS: 00000282
RAX: ffff88801873c0d0 RBX: 0000000000000001 RCX: ffffc900150e7b40
RDX: 1ffff1100e93e8c6 RSI: ffffffff8a8caca0 RDI: ffffffff8ae963e0
RBP: 000000000000018b R08: 0000000000000000 R09: fffffbfff1d9dd02
R10: ffffffff8ecee817 R11: 0000000000000000 R12: ffff88801873c0c0
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558f09e99040 CR3: 000000000c976000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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