INFO: task syz-executor:5766 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21704 pid:5766 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
schedule+0xbd/0x170 kernel/sched/core.c:6774
io_schedule+0x80/0xd0 kernel/sched/core.c:9023
folio_wait_bit_common+0x714/0xfa0 mm/filemap.c:1329
__filemap_get_folio+0xbc/0xbb0 mm/filemap.c:1910
truncate_inode_pages_range+0x46b/0xfb0 mm/truncate.c:401
evict+0x4dd/0x8d0 fs/inode.c:707
dispose_list fs/inode.c:738 [inline]
evict_inodes+0x606/0x6a0 fs/inode.c:792
generic_shutdown_super+0x97/0x2b0 fs/super.c:672
kill_block_super+0x44/0x90 fs/super.c:1660
deactivate_locked_super+0x97/0x100 fs/super.c:481
cleanup_mnt+0x43b/0x4d0 fs/namespace.c:1259
task_work_run+0x1d4/0x260 kernel/task_work.c:245
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f49c0d9d1d7
RSP: 002b:00007ffdaab353e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f49c0e31c3b RCX: 00007f49c0d9d1d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdaab354a0
RBP: 00007ffdaab354a0 R08: 00007ffdaab364a0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdaab36530
R13: 00007f49c0e31c3b R14: 00000000001b1b2b R15: 00007ffdaab36570
Showing all locks held in the system:
3 locks held by kworker/1:1/27:
#0: ffff8881400f3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#0: ffff8881400f3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x96f/0x15d0 kernel/workqueue.c:2711
#1: ffffc90000a2fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#1: ffffc90000a2fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x96f/0x15d0 kernel/workqueue.c:2711
#2: ffff888024fcd190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:995 [inline]
#2: ffff888024fcd190 (&dev->mutex){....}-{3:3}, at: hub_event+0x180/0x49f0 drivers/usb/core/hub.c:5861
1 lock held by khungtaskd/29:
#0: ffffffff8d131fe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8d131fe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8d131fe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
3 locks held by acpid/5123:
#0: ffff888026667158 (&mousedev->mutex#2){+.+.}-{3:3}, at: mousedev_open_device+0x27/0x150 drivers/input/mousedev.c:423
#1: ffff88807d4752c0 (&dev->mutex#2){+.+.}-{3:3}, at: input_open_device+0x52/0x2e0 drivers/input/input.c:634
#2: ffff888143f80508 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3215 [inline]
#2: ffff888143f80508 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_port_resume+0x26b/0x1c40 drivers/usb/core/hub.c:3773
1 lock held by klogd/5127:
#0: ffff8880b8f3c018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
2 locks held by getty/5523:
#0: ffff8880311ba0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000326e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x433/0x1390 drivers/tty/n_tty.c:2217
1 lock held by syz-executor/5766:
#0: ffff8880242780e0 (&type->s_umount_key#53){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880242780e0 (&type->s_umount_key#53){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880242780e0 (&type->s_umount_key#53){++++}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513
3 locks held by syz.0.15924/10585:
#0: ffff88802e415748 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2a3/0x330 fs/file.c:1040
#1: ffff88807b142418 (sb_writers#3){.+.+}-{0:0}, at: vfs_writev fs/read_write.c:932 [inline]
#1: ffff88807b142418 (sb_writers#3){.+.+}-{0:0}, at: do_writev+0x261/0x480 fs/read_write.c:976
#2: ffff8880242780e0 (&type->s_umount_key#53){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#2: ffff8880242780e0 (&type->s_umount_key#53){++++}-{3:3}, at: super_lock+0x17f/0x3a0 fs/super.c:117
2 locks held by syz.3.17531/14171:
#0: ffff88807b08b110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_open_device drivers/input/evdev.c:393 [inline]
#0: ffff88807b08b110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_open+0x2d6/0x5b0 drivers/input/evdev.c:487
#1: ffff88807d4752c0 (&dev->mutex#2){+.+.}-{3:3}, at: input_open_device+0x52/0x2e0 drivers/input/input.c:634
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Call Trace:
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a6/0x3e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 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+0xf3d/0xf80 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 27983 Comm: kworker/u4:13 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Workqueue: bat_events batadv_nc_worker
RIP: 0010:do_raw_spin_lock+0xc/0x2c0 kernel/locking/spinlock_debug.c:113
Code: 07 80 c1 03 38 c1 7c 95 48 89 df e8 ae c9 75 00 eb 8b 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 <41> 55 41 54 53 48 83 e4 e0 48 81 ec 80 00 00 00 48 89 fb 65 48 8b
RSP: 0018:ffffc9000fd07aa8 EFLAGS: 00000292
RAX: f97d22dccf261b00 RBX: ffffffff8a4c39d0 RCX: f97d22dccf261b00
RDX: 0000000000000000 RSI: ffffffff8acada80 RDI: ffff888079888d40
RBP: ffffc9000fd07ab8 R08: dffffc0000000000 R09: 1ffffffff2237ebb
R10: dffffc0000000000 R11: fffffbfff2237ebc R12: ffff888021a6d1a8
R13: dffffc0000000000 R14: ffff8880533f7040 R15: ffff8880533f7050
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d716ff8 CR3: 000000005bd3a000 CR4: 00000000003506e0
Call Trace:
spin_lock_bh include/linux/spinlock.h:356 [inline]
batadv_nc_purge_paths+0xe7/0x3a0 net/batman-adv/network-coding.c:442
batadv_nc_worker+0x369/0x610 net/batman-adv/network-coding.c:722
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293