INFO: task khugepaged:34 blocked for more than 143 seconds.
Not tainted 6.5.0-syzkaller-03967-gbd6c11bc43c4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:khugepaged state:D stack:28032 pid:34 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
schedule_timeout+0x27a/0x2c0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e2/0x5f0 kernel/sched/completion.c:116
__flush_work+0x5d9/0xc10 kernel/workqueue.c:3389
__lru_add_drain_all+0x52c/0x740 mm/swap.c:897
khugepaged_do_scan mm/khugepaged.c:2617 [inline]
khugepaged+0x117/0x1860 mm/khugepaged.c:2686
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8c9a84a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615
1 lock held by khugepaged/34:
#0: ffffffff8cab9448 (lock#3){+.+.}-{3:3}, at: __lru_add_drain_all+0x69/0x740 mm/swap.c:852
1 lock held by klogd/4477:
2 locks held by getty/4785:
#0: ffff88802cea2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015972f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfcb/0x1480 drivers/tty/n_tty.c:2187
3 locks held by syz-executor.0/5046:
4 locks held by kworker/1:35/7559:
4 locks held by kworker/1:2/23102:
4 locks held by kworker/1:4/23104:
5 locks held by kworker/1:0/29869:
2 locks held by kworker/1:1/3791:
2 locks held by kworker/u4:7/7294:
4 locks held by kworker/1:6/12362:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.5.0-syzkaller-03967-gbd6c11bc43c4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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+0x2ac/0x310 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+0xfab/0x1230 kernel/hung_task.c:379
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5046 Comm: syz-executor.0 Not tainted 6.5.0-syzkaller-03967-gbd6c11bc43c4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:unwind_next_frame+0x21/0x2020 arch/x86/kernel/unwind_orc.c:469
Code: ff ff 0f 1f 80 00 00 00 00 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 41 57 48 c1 ea 03 41 56 41 55 49 89 fd 41 54 55 <53> 48 83 ec 38 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 40 0a 00 00 41
RSP: 0018:ffffc900001e02f8 EFLAGS: 00000a06
RAX: dffffc0000000000 RBX: ffffc900001e0328 RCX: 0000000000000000
RDX: 1ffff9200003c065 RSI: ffffffff814ecfc7 RDI: ffffc900001e0328
RBP: ffffc900001e03b8 R08: ffffc900001e035c R09: ffffffff8fd92348
R10: ffffc900001e0328 R11: 0000000000093b39 R12: ffffffff81745590
R13: ffffc900001e0328 R14: 0000000000000000 R15: ffff888028333b80
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002440 CR3: 000000002bde3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x8b/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15e/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:162 [inline]
slab_free_hook mm/slub.c:1792 [inline]
slab_free_freelist_hook+0x10b/0x1e0 mm/slub.c:1818
slab_free mm/slub.c:3801 [inline]
kmem_cache_free+0xf0/0x490 mm/slub.c:3823
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1004
__kfree_skb net/core/skbuff.c:1062 [inline]
consume_skb net/core/skbuff.c:1277 [inline]
consume_skb+0xdf/0x170 net/core/skbuff.c:1271
vxcan_xmit drivers/net/can/vxcan.c:60 [inline]
vxcan_xmit+0x1c9/0x840 drivers/net/can/vxcan.c:37
__netdev_start_xmit include/linux/netdevice.h:4889 [inline]
netdev_start_xmit include/linux/netdevice.h:4903 [inline]
xmit_one net/core/dev.c:3544 [inline]
dev_hard_start_xmit+0x13d/0x6c0 net/core/dev.c:3560
__dev_queue_xmit+0x9be/0x3d80 net/core/dev.c:4340
dev_queue_xmit include/linux/netdevice.h:3082 [inline]
can_send+0x543/0xb00 net/can/af_can.c:276
can_can_gw_rcv+0x74c/0xab0 net/can/gw.c:561
deliver net/can/af_can.c:572 [inline]
can_rcv_filter+0x15e/0x8e0 net/can/af_can.c:599
can_receive+0x31d/0x5c0 net/can/af_can.c:663
can_rcv+0x1dc/0x270 net/can/af_can.c:687
__netif_receive_skb_one_core+0x115/0x180 net/core/dev.c:5523
__netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5637
process_backlog+0x101/0x6c0 net/core/dev.c:5965
__napi_poll.constprop.0+0xb4/0x530 net/core/dev.c:6527
napi_poll net/core/dev.c:6594 [inline]
net_rx_action+0x956/0xe90 net/core/dev.c:6727
__do_softirq+0x218/0x965 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:folio_test_hugetlb+0x0/0xb0 mm/hugetlb.c:2087
Code: 41 5c e9 f3 8a b1 ff e8 ee 8a b1 ff 48 c7 c6 40 10 7a 8a 48 89 df e8 bf 4b ef ff 0f 0b 48 89 ef e8 95 ca 06 00 eb 86 0f 1f 00 0f 1e fa 55 48 89 fd 53 e8 c2 8a b1 ff 48 89 ef e8 1a fc ff ff
RSP: 0018:ffffc90003987688 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffea0001ff8dc0 RCX: 0000000000000000
RDX: ffff888028333b80 RSI: ffffffff81cd1348 RDI: ffffea0001ff8dc0
RBP: ffffea0001ff8dc0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000000051c4 R12: 0000000000000000
R13: ffff88802b7f3800 R14: 0000000000000000 R15: ffffea0001ff8e18
page_remove_rmap+0xa0/0xc20 mm/rmap.c:1382
zap_pte_range mm/memory.c:1453 [inline]
zap_pmd_range mm/memory.c:1570 [inline]
zap_pud_range mm/memory.c:1599 [inline]
zap_p4d_range mm/memory.c:1620 [inline]
unmap_page_range+0x1ba1/0x32e0 mm/memory.c:1641
unmap_single_vma+0x194/0x2b0 mm/memory.c:1687
unmap_vmas+0x267/0x3c0 mm/memory.c:1726
exit_mmap+0x1a7/0x960 mm/mmap.c:3203
__mmput+0x12a/0x4d0 kernel/fork.c:1356
mmput+0x62/0x70 kernel/fork.c:1378
exit_mm kernel/exit.c:567 [inline]
do_exit+0x9b4/0x2a20 kernel/exit.c:861
do_group_exit+0xd4/0x2a0 kernel/exit.c:1024
get_signal+0x23ea/0x2770 kernel/signal.c:2881
arch_do_signal_or_restart+0x89/0x5f0 arch/x86/kernel/signal.c:308
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd5a3279b13
Code: Unable to access opcode bytes at 0x7fd5a3279ae9.
RSP: 002b:00007ffe8a0392f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: fffffffffffffff4 RBX: 0000000000000000 RCX: 00007fd5a3279b13
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055555583f750 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001