INFO: task syz-executor.4:20349 blocked for more than 143 seconds.
Not tainted 6.5.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27296 pid:20349 ppid:1407 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0xc44/0x3060 kernel/sched/core.c:6710
schedule+0xe7/0x1b0 kernel/sched/core.c:6786
io_schedule+0xbe/0x130 kernel/sched/core.c:9028
folio_wait_bit_common+0x2c2/0x720 mm/filemap.c:1304
folio_lock include/linux/pagemap.h:959 [inline]
clean_bdev_aliases+0x439/0x4d0 fs/buffer.c:1740
clean_bdev_bh_alias include/linux/buffer_head.h:228 [inline]
__block_write_begin_int+0x657/0x1060 fs/buffer.c:2130
iomap_write_begin+0x42f/0x1220 fs/iomap/buffered-io.c:679
iomap_write_iter fs/iomap/buffered-io.c:816 [inline]
iomap_file_buffered_write+0x348/0x6c0 fs/iomap/buffered-io.c:873
blkdev_buffered_write block/fops.c:583 [inline]
blkdev_write_iter+0x426/0xb20 block/fops.c:637
call_write_iter include/linux/fs.h:1871 [inline]
do_iter_readv_writev+0x1a8/0x2f0 fs/read_write.c:735
do_iter_write+0x132/0x7b0 fs/read_write.c:860
iter_file_splice_write+0x563/0xad0 fs/splice.c:739
do_splice_from fs/splice.c:934 [inline]
direct_splice_actor+0x105/0x1d0 fs/splice.c:1143
splice_direct_to_actor+0x2c0/0x9a0 fs/splice.c:1089
do_splice_direct+0x151/0x260 fs/splice.c:1195
do_sendfile+0x912/0x1270 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+0x193/0x1d0 fs/read_write.c:1308
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3e9491eae9
RSP: 002b:00007f3e944a10c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f3e94a3df80 RCX: 00007f3e9491eae9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00007f3e9496a47a R08: 0000000000000000 R09: 0000000000000000
R10: 0100000000000042 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007f3e94a3df80 R15: 00007ffeb6230048
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff840a3350 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522
1 lock held by khungtaskd/26:
#0: ffffffff840a3f60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615
2 locks held by kworker/u4:6/430:
#0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
#0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
#0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
#0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
#0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline]
#0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline]
#0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x85f/0x1520 kernel/workqueue.c:2567
#1: ffffc90001b6fd98 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x88c/0x1520 kernel/workqueue.c:2571
2 locks held by getty/763:
#0: ffff888107ba8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x23/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900002632f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xc6c/0x1310 drivers/tty/n_tty.c:2187
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 6.5.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x5c/0xb0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x167/0x210 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x1d4/0x210 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+0xa22/0xca0 kernel/hung_task.c:379
kthread+0x2e6/0x3c0 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
RIP: 0000:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8882 Comm: syz-executor.0 Not tainted 6.5.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:_raw_spin_lock+0x4/0x40 kernel/locking/spinlock.c:153
Code: eb ef fd 2e 2e 2e 31 c0 48 89 ea 48 89 df 5b 5d 31 f6 e9 2f 8b f4 fe cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc f3 0f 1e fa <53> 48 89 fb bf 01 00 00 00 e8 7e 08 f0 fd 45 31 c9 41 b8 01 00 00
RSP: 0018:ffffc9000154fc18 EFLAGS: 00000283
RAX: ffff88811f9a2820 RBX: ffff88811f9a2240 RCX: 0000000000000001
RDX: 1ffff11021f70432 RSI: ffffffff83806be0 RDI: ffff88811f9a2b68
RBP: ffff88811f9a2240 R08: 0000000000000000 R09: fffffbfff0cb9f38
R10: ffffffff865cf9c7 R11: ffff888108f98000 R12: ffff88811f9a2b68
R13: ffff88811f9a2ab8 R14: dffffc0000000000 R15: ffff888104f3ecc0
FS: 0000555556d02480(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2947cfebc0 CR3: 00000001261a2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
spin_lock include/linux/spinlock.h:351 [inline]
task_lock include/linux/sched/task.h:185 [inline]
find_lock_task_mm+0xb7/0x240 mm/oom_kill.c:140
__set_oom_adj.isra.0+0x891/0xe10 fs/proc/base.c:1098
oom_score_adj_write+0x172/0x1a0 fs/proc/base.c:1237
vfs_write+0x208/0xd50 fs/read_write.c:582
ksys_write+0xf6/0x1d0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2947c7a7f0
Code: 40 00 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d 11 07 10 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
RSP: 002b:00007ffd40574828 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f2947c7a7f0
RDX: 0000000000000004 RSI: 00007ffd40574850 RDI: 0000000000000003
RBP: 00007f2947cc7502 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004
R13: 00007ffd40574850 R14: 0000000000000001 R15: 0000000000000000