INFO: task syz-executor.4:9606 blocked for more than 143 seconds.
Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26992 pid:9606 tgid:9605 ppid:5080 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1781/0x49d0 kernel/sched/core.c:6736
__schedule_loop kernel/sched/core.c:6813 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6828
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
odev_open+0x59/0xa0 sound/core/seq/oss/seq_oss.c:127
chrdev_open+0x5b0/0x630 fs/char_dev.c:414
do_dentry_open+0x907/0x15a0 fs/open.c:955
do_open fs/namei.c:3642 [inline]
path_openat+0x2860/0x3240 fs/namei.c:3799
do_filp_open+0x235/0x490 fs/namei.c:3826
do_sys_openat2+0x13e/0x1d0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_openat fs/open.c:1437 [inline]
__se_sys_openat fs/open.c:1432 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1432
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fc3df47dda9
RSP: 002b:00007fc3e01820c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc3df5abf80 RCX: 00007fc3df47dda9
RDX: 0000000000000000 RSI: 0000000020000580 RDI: ffffffffffffff9c
RBP: 00007fc3df4ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fc3df5abf80 R15: 00007ffd0419d3f8
INFO: task syz-executor.4:9607 blocked for more than 143 seconds.
Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27216 pid:9607 tgid:9605 ppid:5080 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1781/0x49d0 kernel/sched/core.c:6736
__schedule_loop kernel/sched/core.c:6813 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6828
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
odev_open+0x59/0xa0 sound/core/seq/oss/seq_oss.c:127
chrdev_open+0x5b0/0x630 fs/char_dev.c:414
do_dentry_open+0x907/0x15a0 fs/open.c:955
do_open fs/namei.c:3642 [inline]
path_openat+0x2860/0x3240 fs/namei.c:3799
do_filp_open+0x235/0x490 fs/namei.c:3826
do_sys_openat2+0x13e/0x1d0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_openat fs/open.c:1437 [inline]
__se_sys_openat fs/open.c:1432 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1432
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fc3df47dda9
RSP: 002b:00007fc3e01610c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc3df5ac050 RCX: 00007fc3df47dda9
RDX: 0000000000000000 RSI: 0000000020000580 RDI: ffffffffffffff9c
RBP: 00007fc3df4ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fc3df5ac050 R15: 00007ffd0419d3f8
Showing all locks held in the system:
3 locks held by kworker/0:1/8:
#0: ffff888014c78948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline]
#0: ffff888014c78948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335
#1: ffffc900000d7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline]
#1: ffffc900000d7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335
#2: ffffffff8f37b588 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
1 lock held by khungtaskd/29:
#0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:6/1090:
#0: ffff888014c81148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline]
#0: ffff888014c81148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335
#1: ffffc90004537d00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline]
#1: ffffc90004537d00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335
3 locks held by kworker/u8:7/2464:
2 locks held by getty/4819:
#0: ffff88802a6ce0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
6 locks held by kworker/u9:2/5076:
6 locks held by kworker/0:3/5126:
#0: ffff88801aea9548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline]
#0: ffff88801aea9548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335
#1: ffffc9000491fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline]
#1: ffffc9000491fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335
#2: ffff8880233b6190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff8880233b6190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x50f0 drivers/usb/core/hub.c:5811
#3: ffff888023441510 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3169 [inline]
#3: ffff888023441510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5380 [inline]
#3: ffff888023441510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5623 [inline]
#3: ffff888023441510 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5783 [inline]
#3: ffff888023441510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x255f/0x50f0 drivers/usb/core/hub.c:5865
#4: ffff888022b5c968 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5381 [inline]
#4: ffff888022b5c968 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5623 [inline]
#4: ffff888022b5c968 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5783 [inline]
#4: ffff888022b5c968 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x259d/0x50f0 drivers/usb/core/hub.c:5865
#5: ffffffff8ecdab90 (ehci_cf_port_reset_rwsem){.+.+}-{3:3}, at: hub_port_reset+0x1f8/0x1b30 drivers/usb/core/hub.c:2984
2 locks held by syz-executor.1/9399:
1 lock held by syz-executor.4/9606:
#0: ffffffff8f2d3228 (register_mutex#4){+.+.}-{3:3}, at: odev_open+0x59/0xa0 sound/core/seq/oss/seq_oss.c:127
1 lock held by syz-executor.4/9607:
#0: ffffffff8f2d3228 (register_mutex#4){+.+.}-{3:3}, at: odev_open+0x59/0xa0 sound/core/seq/oss/seq_oss.c:127
1 lock held by syz-executor.0/10215:
#0: ffffffff8f2d3228 (register_mutex#4){+.+.}-{3:3}, at: odev_open+0x59/0xa0 sound/core/seq/oss/seq_oss.c:127
1 lock held by syz-executor.3/10356:
#0: ffffffff8f2d3228 (register_mutex#4){+.+.}-{3:3}, at: odev_open+0x59/0xa0 sound/core/seq/oss/seq_oss.c:127
1 lock held by syz-executor.2/10481:
#0: ffffffff8f2d3228 (register_mutex#4){+.+.}-{3:3}, at: odev_open+0x59/0xa0 sound/core/seq/oss/seq_oss.c:127
8 locks held by syz-executor.2/10637:
#0: ffff88807d8fe420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2853 [inline]
#0: ffff88807d8fe420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x233/0xcb0 fs/read_write.c:586
#1: ffff88805127b888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325
#2: ffff88802296da00 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326
#3: ffffffff8ecb4e88 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
#4: ffff8880793260e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#4: ffff8880793260e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff8880793260e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1292
#5: ffff888079327250 (&devlink->lock_key){+.+.}-{3:3}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1672
#6: ffffffff8f37b588 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x40/0x260 drivers/net/netdevsim/netdev.c:451
#7: ffffffff8e1373b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#7: ffffffff8e1373b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x39a/0x820 kernel/rcu/tree_exp.h:939
1 lock held by syz-executor.4/10719:
#0: ffffffff8e137280 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x550 kernel/rcu/tree.c:4073
5 locks held by syz-executor.0/10737:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xfb0/0xff0 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9399 Comm: syz-executor.1 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__sanitizer_cov_trace_pc+0x46/0x70 kernel/kcov.c:212
Code: ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 14 16 00 00 00 74 2c 8b 91 f0 15 00 00 83 fa 02 75 21 48 8b 91 f8 15 00 00 48 8b 32 <48> 8d 7e 01 8b 89 f4 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2
RSP: 0018:ffffc9000cef6ff8 EFLAGS: 00000246
RAX: ffffffff81cea95c RBX: 0000000000000000 RCX: ffff88802ade8000
RDX: ffffc90012c82000 RSI: 000000000003ffff RDI: 0000000000000000
RBP: 1ffff110172a6fc1 R08: ffffffff81cea948 R09: 1ffffffff2595cab
R10: dffffc0000000000 R11: fffffbfff2595cac R12: ffff8880b9537e08
R13: dffffc0000000000 R14: 0000000000000008 R15: ffffea0001589a00
FS: 00007f67ea0b86c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 00000000604a8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
page_fixed_fake_head include/linux/page-flags.h:210 [inline]
page_is_fake_head include/linux/page-flags.h:242 [inline]
PageTail include/linux/page-flags.h:286 [inline]
folio_flags include/linux/page-flags.h:313 [inline]
folio_test_head include/linux/page-flags.h:785 [inline]
folio_test_large include/linux/page-flags.h:806 [inline]
folio_batch_add_and_move+0xdc/0x2b0 mm/swap.c:231
folio_add_lru+0x39c/0x9e0 mm/swap.c:517
filemap_add_folio+0x228/0x570 mm/filemap.c:962
page_cache_ra_unbounded+0x211/0x7c0 mm/readahead.c:250
do_sync_mmap_readahead+0x444/0x850
filemap_fault+0x7c6/0x1680 mm/filemap.c:3245
__do_fault+0x135/0x460 mm/memory.c:4396
do_read_fault mm/memory.c:4758 [inline]
do_fault mm/memory.c:4888 [inline]
do_pte_missing mm/memory.c:3745 [inline]
handle_pte_fault mm/memory.c:5164 [inline]
__handle_mm_fault+0x49e6/0x72d0 mm/memory.c:5305
handle_mm_fault+0x27f/0x770 mm/memory.c:5470
do_user_addr_fault arch/x86/mm/fault.c:1413 [inline]
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x2a8/0x890 arch/x86/mm/fault.c:1563
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:__get_user_4+0x11/0x20 arch/x86/lib/getuser.S:77
Code: 01 ca c3 cc cc cc cc 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 89 c2 48 c1 fa 3f 48 09 d0 0f 01 cb <8b> 10 31 c0 0f 01 ca c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90
RSP: 0018:ffffc9000cef7ab8 EFLAGS: 00050206
RAX: 0000000020000000 RBX: dffffc0000000000 RCX: ffffc9000cef7a03
RDX: 0000000000000000 RSI: ffffffff8baad360 RDI: ffffffff8bfdff00
RBP: ffffc9000cef7c10 R08: ffffffff8f860def R09: 1ffffffff1f0c1bd
R10: dffffc0000000000 R11: fffffbfff1f0c1be R12: 00000000c0045103
R13: ffff88802d102280 R14: 0000000020000000 R15: 1ffff920019def5c
snd_seq_oss_timer_ioctl+0xc4/0xd80 sound/core/seq/oss/seq_oss_timer.c:224
snd_seq_oss_ioctl+0x7f3/0x1250 sound/core/seq/oss/seq_oss_ioctl.c:77
odev_ioctl+0xb8/0xf0 sound/core/seq/oss/seq_oss.c:184
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:904 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f67e927dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f67ea0b80c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f67e93abf80 RCX: 00007f67e927dda9
RDX: 0000000020000000 RSI: 00000000c0045103 RDI: 0000000000000003
RBP: 00007f67e92ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f67e93abf80 R15: 00007ffea47e1168