INFO: task syz-executor.5:29577 blocked for more than 143 seconds.
Not tainted 6.6.0-rc3-syzkaller-00055-g9ed22ae6be81 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:25664 pid:29577 ppid:5098 flags:0x20004006
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_compat_sys_sendfile fs/read_write.c:1343 [inline]
__se_compat_sys_sendfile fs/read_write.c:1326 [inline]
__ia32_compat_sys_sendfile+0x1e3/0x220 fs/read_write.c:1326
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
RIP: 0023:0xf7f39579
RSP: 002b:00000000f7f345ac EFLAGS: 00000292 ORIG_RAX: 00000000000000bb
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000003
RDX: 0000000000000000 RSI: 0000000024002de8 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
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/4800:
#0: ffff88814ab5f0a0 (&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
3 locks held by kworker/u4:1/15148:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc3-syzkaller-00055-g9ed22ae6be81 #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: 23859 Comm: kworker/0:10 Not tainted 6.6.0-rc3-syzkaller-00055-g9ed22ae6be81 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:mutex_trylock+0x0/0x330 kernel/locking/mutex.c:1082
Code: 89 ef e8 43 8e 9c f7 e9 44 ff ff ff 48 c7 c7 94 87 ce 8e e8 72 8d 9c f7 e9 c0 fe ff ff 4c 89 ef e8 85 8d 9c f7 e9 dc fe ff ff 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 49 c7
RSP: 0018:ffffc9001487fc30 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff888042210400 RCX: 0000000000000000
RDX: ffff88802a0b0000 RSI: ffffffff89262cbd RDI: ffff888016f781e8
RBP: ffff888042210400 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888013650000
R13: ffff888016f78300 R14: ffffc9001487fd80 R15: ffff8880b983bec0
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f7378000 CR3: 000000004468e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
nsim_dev_trap_report_work+0x53/0xc70 drivers/net/netdevsim/dev.c:841
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