INFO: task syz.3.892:9022 blocked for more than 143 seconds.
Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.892 state:D stack:27664 pid:9022 tgid:9017 ppid:7948 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0xef5/0x5750 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6767
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2591
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:418 [inline]
do_coredump+0x82f/0x4160 fs/coredump.c:575
get_signal+0x237c/0x26d0 kernel/signal.c:2902
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb17ee403c0
RSP: 002b:00007fb17fdd4a78 EFLAGS: 00000246 ORIG_RAX: 000000000000014e
RAX: 0000000000000000 RBX: 00007fb17f136058 RCX: 00007fb17ef7dff9
RDX: 00007fb17fdd4a80 RSI: 00007fb17fdd4bb0 RDI: 000000000000000b
RBP: 00007fb17eff0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb17f136058 R15: 00007ffda270aaf8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
3 locks held by kworker/u9:1/4622:
#0: ffff888060f00948 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc9000d4d7d80 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffff888060934d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x170/0x410 net/bluetooth/hci_sync.c:327
2 locks held by getty/4987:
#0: ffff8880330420a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
3 locks held by kworker/1:4/5299:
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc90004537d80 ((fqdir_free_work).work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffffffff8ddc3040 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x700 kernel/rcu/tree.c:4561
2 locks held by kworker/u8:26/7856:
#0: ffff888145ef7948 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc90008b7fd80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
3 locks held by kworker/u8:36/7904:
#0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc900047d7d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffffffff8ddc3040 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x700 kernel/rcu/tree.c:4561
1 lock held by syz.3.892/9018:
1 lock held by syz-executor/11767:
#0: ffffffff8ddc3178 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
1 lock held by syz.1.1519/12003:
#0: ffffffff8ddc3178 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf0c/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 11767 Comm: syz-executor Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:check_preemption_disabled+0x25/0xe0 lib/smp_processor_id.c:56
Code: 90 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 1d fd dc f0 74 65 8b 05 f2 dc f0 74 a9 ff ff ff 7f 74 0f 48 83 c4 08 89 d8 5b 5d <41> 5c c3 cc cc cc cc 9c 58 f6 c4 02 74 ea 65 48 8b 05 c5 dc f0 74
RSP: 0018:ffffc9000d187ac8 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 1ffff92001a30f5d RCX: ffffffff816a2689
RDX: 1ffffffff1bb6f00 RSI: ffffffff8b4ccba0 RDI: ffffffff8bb12060
RBP: ffffffff901cf8f8 R08: 0000000000000000 R09: fffffbfff20398c1
R10: ffffffff901cc60f R11: 0000000000000000 R12: ffffffff8ddb7800
R13: 0000000000000000 R14: ffff888032b5bc00 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4553067d60 CR3: 00000000625c8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
lock_release+0x187/0x6f0 kernel/locking/lockdep.c:5845
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
page_ext_put+0x43/0xd0 mm/page_ext.c:550
__page_table_check_zero+0x2d7/0x360 mm/page_table_check.c:160
page_table_check_free include/linux/page_table_check.h:41 [inline]
free_pages_prepare mm/page_alloc.c:1109 [inline]
free_unref_page+0x5e5/0xdc0 mm/page_alloc.c:2638
vfree+0x17a/0x890 mm/vmalloc.c:3361
kcov_put kernel/kcov.c:439 [inline]
kcov_put+0x2a/0x40 kernel/kcov.c:435
kcov_close+0xd/0x20 kernel/kcov.c:535
__fput+0x3f6/0xb60 fs/file_table.c:431
task_work_run+0x14e/0x250 kernel/task_work.c:228
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xadd/0x2d70 kernel/exit.c:939
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcaff97dff9
Code: Unable to access opcode bytes at 0x7fcaff97dfcf.
RSP: 002b:00007ffda069fe38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fcaff9f1943 RCX: 00007fcaff97dff9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043
RBP: 00007fcaff9f1955 R08: 00007ffda069dbd7 R09: 000000000005cb1b
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 000000000005cb1b R14: 000000000005c9e2 R15: 00007ffda069ffd0