INFO: task syz-executor.2:8878 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.2 state:D stack:27792 pid:8878 tgid:8877 ppid:5085 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5c70 kernel/sched/core.c:6736
__schedule_loop kernel/sched/core.c:6813 [inline]
schedule+0xe7/0x350 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+0x5b8/0x9c0 kernel/locking/mutex.c:752
bdev_release+0x161/0xb30 block/bdev.c:1028
blkdev_release+0x15/0x20 block/fops.c:628
__fput+0x270/0xb80 fs/file_table.c:422
task_work_run+0x14e/0x250 kernel/task_work.c:180
get_signal+0x105e/0x2760 kernel/signal.c:2683
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:212
do_syscall_64+0xe2/0x260 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f7fd5a7dda9
RSP: 002b:00007f7fd68180c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f7fd5babf80 RCX: 00007f7fd5a7dda9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f7fd5aca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7fd5babf80 R15: 00007ffe98673b98
Showing all locks held in the system:
2 locks held by kworker/u8:0/10:
1 lock held by khungtaskd/29:
#0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4819:
#0: ffff88802a9240a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015f02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
4 locks held by syz-executor.4/5093:
1 lock held by udevd/5232:
#0: ffff8880b953e698 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
1 lock held by udevd/5409:
#0: ffff888020cc64c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x444/0xe30 block/bdev.c:862
1 lock held by syz-executor.2/8878:
#0: ffff888020cc64c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x161/0xb30 block/bdev.c:1028
1 lock held by syz-executor.2/10037:
#0: ffff888020cc64c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x444/0xe30 block/bdev.c:862
1 lock held by syz-executor.2/10590:
#0: ffff888020cc64c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x444/0xe30 block/bdev.c:862
1 lock held by syz-executor.3/11103:
#0: ffffffff8d7bc380 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6c0 kernel/rcu/tree.c:4073
5 locks held by syz-executor.2/11128:
4 locks held by kvm-nx-lpage-re/11126:
#0: ffffffff8d800f88 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock include/linux/cgroup.h:368 [inline]
#0: ffffffff8d800f88 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_attach_task_all+0x25/0x130 kernel/cgroup/cgroup-v1.c:61
#1: ffffffff8d653cb0 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_attach_lock+0x12/0x40 kernel/cgroup/cgroup.c:2413
#2: ffffffff8d800d50 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2415 [inline]
#2: ffffffff8d800d50 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock+0x37/0x40 kernel/cgroup/cgroup.c:2411
#3: ffffffff8d7bc4b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#3: ffffffff8d7bc4b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x682/0x7a0 kernel/rcu/tree_exp.h:939
3 locks held by syz-executor.1/11145:
#0: ffffffff8f2cd128 (vlan_ioctl_mutex){+.+.}-{3:3}, at: sock_ioctl+0x4a8/0x6c0 net/socket.c:1303
#1: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: vlan_ioctl_handler+0xcf/0xa80 net/8021q/vlan.c:553
#2: ffffffff8d7bc4b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#2: ffffffff8d7bc4b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x403/0x7a0 kernel/rcu/tree_exp.h:939
3 locks held by syz-executor.1/11149:
#0: ffffffff8f392d10 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1216
#1: ffffffff8f392dc8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#1: ffffffff8f392dc8 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline]
#1: ffffffff8f392dc8 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline]
#1: ffffffff8f392dc8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x587/0x810 net/netlink/genetlink.c:1207
#2: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: tipc_nl_bearer_enable+0x16/0x40 net/tipc/bearer.c:1051
1 lock held by syz-executor.4/11147:
#0: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
1 lock held by syz-executor.0/11156:
=============================================
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+0x116/0x1f0 lib/dump_stack.c:114
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf86/0x1210 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 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: 11156 Comm: syz-executor.0 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:__lock_acquire+0x200/0x3b30 kernel/locking/lockdep.c:5046
Code: 28 4c 8d 14 80 85 c0 4e 8d 34 d5 00 00 00 00 74 4f 41 f6 c5 01 75 49 4a 8d 44 37 d8 48 ba 00 00 00 00 00 fc ff df 48 8d 78 20 <48> 89 fe 48 c1 ee 03 0f b6 14 16 84 d2 74 09 80 fa 03 0f 8e f6 2b
RSP: 0018:ffffc90003d67610 EFLAGS: 00000046
RAX: ffff888072dde528 RBX: 0000000000000000 RCX: 0000000000000002
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff888072dde548
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000000f R11: 0000000000000003 R12: ffffffff8d7b0820
R13: 0000000000000000 R14: 0000000000000078 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020729000 CR3: 000000002e828000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:842 [inline]
pfn_valid include/linux/mmzone.h:2016 [inline]
page_table_check_clear mm/page_table_check.c:68 [inline]
__page_table_check_pte_clear+0x1c0/0x570 mm/page_table_check.c:158
page_table_check_pte_clear include/linux/page_table_check.h:49 [inline]
ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1302 [inline]
zap_pte_range mm/memory.c:1452 [inline]
zap_pmd_range mm/memory.c:1597 [inline]
zap_pud_range mm/memory.c:1626 [inline]
zap_p4d_range mm/memory.c:1647 [inline]
unmap_page_range+0x17ff/0x2af0 mm/memory.c:1668
unmap_single_vma+0x194/0x2b0 mm/memory.c:1714
unmap_vmas+0x22f/0x490 mm/memory.c:1758
exit_mmap+0x1c1/0xb60 mm/mmap.c:3287
__mmput+0x12a/0x4d0 kernel/fork.c:1345
mmput+0x62/0x70 kernel/fork.c:1367
exit_mm kernel/exit.c:569 [inline]
do_exit+0x999/0x2be0 kernel/exit.c:865
do_group_exit+0xd3/0x2a0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1036
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fe44b47dda9
Code: Unable to access opcode bytes at 0x7fe44b47dd7f.
RSP: 002b:00007ffe14980078 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007fe44b47dda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2d060000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
vkms_vblank_simulate: vblank timer overrun