INFO: task syz.5.6436:30773 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.6436 state:D stack:22272 pid:30773 tgid:30773 ppid:30182 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_timeout+0xb0/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
vhost_task_stop+0xc1/0xe0 kernel/vhost_task.c:102
kvm_destroy_vm virt/kvm/kvm_main.c:1271 [inline]
kvm_put_kvm+0x372/0xf60 virt/kvm/kvm_main.c:1340
kvm_vm_release+0x43/0x50 virt/kvm/kvm_main.c:1363
__fput+0x23c/0xa50 fs/file_table.c:450
task_work_run+0x24f/0x310 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2ea117e819
RSP: 002b:00007ffd1be0e698 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f2ea1337ba0 RCX: 00007f2ea117e819
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f2ea1337ba0 R08: 000000000000df60 R09: 00007ffd1be0e98f
R10: 00007f2ea1337ac0 R11: 0000000000000246 R12: 00000000002aea61
R13: 00007ffd1be0e7a0 R14: 0000000000000032 R15: ffffffffffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
2 locks held by getty/5593:
#0: ffff8880333880a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by syz-executor/5827:
#0: ffff888032ee9b68 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_read include/linux/mm.h:716 [inline]
#0: ffff888032ee9b68 (&vma->vm_lock->lock){++++}-{4:4}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6278
#1: ffff88814e58a518 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1725 [inline]
#1: ffff88814e58a518 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1890 [inline]
#1: ffff88814e58a518 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1ef/0xdf0 fs/ext4/inode.c:6158
#2: ffff88814e58e958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1e94/0x2110 fs/jbd2/transaction.c:448
3 locks held by kworker/u8:3/15684:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc900055efd00 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc900055efd00 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff9a602128 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x17f/0x580 lib/debugobjects.c:818
2 locks held by kworker/u8:0/26942:
#0: ffff8880b873e758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
#1: ffffc9000cd0fd00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000cd0fd00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
3 locks held by syz-executor/31224:
#0: ffff888026f85760 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline]
#0: ffff888026f85760 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x17c/0x3d0 mm/util.c:578
#1: ffff88814e58a420 (sb_writers#4){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2539 [inline]
#1: ffff88814e58a420 (sb_writers#4){.+.+}-{0:0}, at: ext4_file_mmap+0x18c/0x540 fs/ext4/file.c:816
#2: ffff88814e58e958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1e94/0x2110 fs/jbd2/transaction.c:448
3 locks held by syz-executor/31225:
#0: ffff888078d56a60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline]
#0: ffff888078d56a60 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x17c/0x3d0 mm/util.c:578
#1: ffff88814e58a420 (sb_writers#4){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2539 [inline]
#1: ffff88814e58a420 (sb_writers#4){.+.+}-{0:0}, at: ext4_file_mmap+0x18c/0x540 fs/ext4/file.c:816
#2: ffff88814e58e958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1e94/0x2110 fs/jbd2/transaction.c:448
3 locks held by syz-executor/31226:
#0: ffff888078d527e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline]
#0: ffff888078d527e0 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x17c/0x3d0 mm/util.c:578
#1: ffff88814e58a420 (sb_writers#4){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2539 [inline]
#1: ffff88814e58a420 (sb_writers#4){.+.+}-{0:0}, at: ext4_file_mmap+0x18c/0x540 fs/ext4/file.c:816
#2: ffff88814e58e958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1e94/0x2110 fs/jbd2/transaction.c:448
3 locks held by syz-executor/31227:
#0: ffff888026f86a60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline]
#0: ffff888026f86a60 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x17c/0x3d0 mm/util.c:578
#1: ffff88814e58a420 (sb_writers#4){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2539 [inline]
#1: ffff88814e58a420 (sb_writers#4){.+.+}-{0:0}, at: ext4_file_mmap+0x18c/0x540 fs/ext4/file.c:816
#2: ffff88814e58e958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1e94/0x2110 fs/jbd2/transaction.c:448
3 locks held by syz-executor/31228:
#0: ffff888026f80b60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline]
#0: ffff888026f80b60 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x17c/0x3d0 mm/util.c:578
#1: ffff88814e58a420 (sb_writers#4){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2539 [inline]
#1: ffff88814e58a420 (sb_writers#4){.+.+}-{0:0}, at: ext4_file_mmap+0x18c/0x540 fs/ext4/file.c:816
#2: ffff88814e58e958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1e94/0x2110 fs/jbd2/transaction.c:448
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #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+0x241/0x360 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xffb/0x1040 kernel/hung_task.c:397
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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: 26964 Comm: kworker/u8:20 Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker
RIP: 0010:fsub arch/x86/crypto/curve25519-x86_64.c:118 [inline]
RIP: 0010:curve25519_ever64_base arch/x86/crypto/curve25519-x86_64.c:1572 [inline]
RIP: 0010:curve25519_base_arch+0x4f3/0x3600 arch/x86/crypto/curve25519-x86_64.c:1609
Code: 4c 24 08 4d 8b 55 10 4d 1b 54 24 10 4d 8b 5d 18 4d 1b 5c 24 18 48 c7 c0 00 00 00 00 48 c7 c1 26 00 00 00 48 0f 42 c1 49 29 c0 <49> 83 d9 00 49 83 da 00 49 83 db 00 48 c7 c0 00 00 00 00 48 0f 42
RSP: 0000:ffffc9000cef73c0 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 00000000000001f4 RCX: 0000000000000026
RDX: ffffc9000cef7560 RSI: 0000000000000000 RDI: 0000000000000040
RBP: ffffc9000cef7710 R08: c1a3acb14461df82 R09: 0cfec4fc40fb6fb0
R10: 7265dc1e6771e64a R11: 257353a6fedfeab6 R12: ffffc9000cef74e0
R13: ffffc9000cef74c0 R14: ffffffffffffffff R15: 714be03e866302fc
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8f5175a88e CR3: 000000000e738000 CR4: 00000000003526f0
Call Trace:
curve25519_generate_public include/crypto/curve25519.h:55 [inline]
wg_noise_handshake_create_initiation+0x452/0xf30 drivers/net/wireguard/noise.c:542
wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:34 [inline]
wg_packet_handshake_send_worker+0x15b/0x330 drivers/net/wireguard/send.c:51
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244