INFO: task krfcommd:4765 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:krfcommd state:D stack:29640 pid: 4765 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 rfcomm_process_sessions net/bluetooth/rfcomm/core.c:1979 [inline] rfcomm_run+0x2ed/0x4a20 net/bluetooth/rfcomm/core.c:2086 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task syz-executor.5:5745 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28600 pid: 5745 ppid: 22310 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 __lock_sock+0x13d/0x260 net/core/sock.c:2644 lock_sock_nested+0xf6/0x120 net/core/sock.c:3185 lock_sock include/net/sock.h:1612 [inline] bt_sock_wait_state+0x249/0x590 net/bluetooth/af_bluetooth.c:557 rfcomm_sock_connect+0x3a5/0x460 net/bluetooth/rfcomm/sock.c:416 __sys_connect_file+0x155/0x1a0 net/socket.c:1896 __sys_connect+0x161/0x190 net/socket.c:1913 __do_sys_connect net/socket.c:1923 [inline] __se_sys_connect net/socket.c:1920 [inline] __x64_sys_connect+0x6f/0xb0 net/socket.c:1920 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 RSP: 002b:00007f9eab316188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 0000000000000080 RSI: 0000000020000000 RDI: 0000000000000009 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd7ed3bc7f R14: 00007f9eab316300 R15: 0000000000022000 INFO: task syz-executor.5:5754 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:30040 pid: 5754 ppid: 22310 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 __lock_sock+0x13d/0x260 net/core/sock.c:2644 lock_sock_nested+0xf6/0x120 net/core/sock.c:3185 lock_sock include/net/sock.h:1612 [inline] rfcomm_sk_state_change+0xb4/0x390 net/bluetooth/rfcomm/sock.c:73 __rfcomm_dlc_close+0x1b6/0x8a0 net/bluetooth/rfcomm/core.c:489 rfcomm_dlc_close+0x1ea/0x240 net/bluetooth/rfcomm/core.c:520 __rfcomm_sock_close+0xac/0x260 net/bluetooth/rfcomm/sock.c:220 rfcomm_sock_shutdown+0xe9/0x210 net/bluetooth/rfcomm/sock.c:931 __sys_shutdown_sock net/socket.c:2248 [inline] __sys_shutdown_sock net/socket.c:2242 [inline] __sys_shutdown+0xf1/0x1b0 net/socket.c:2260 __do_sys_shutdown net/socket.c:2268 [inline] __se_sys_shutdown net/socket.c:2266 [inline] __x64_sys_shutdown+0x50/0x70 net/socket.c:2266 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 RSP: 002b:00007f9eab2f5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000030 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000009 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffd7ed3bc7f R14: 00007f9eab2f5300 R15: 0000000000022000 INFO: task syz-executor.5:5827 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28936 pid: 5827 ppid: 22310 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 rfcomm_dlc_open+0x8f/0xa80 net/bluetooth/rfcomm/core.c:425 rfcomm_sock_connect+0x32f/0x460 net/bluetooth/rfcomm/sock.c:413 __sys_connect_file+0x155/0x1a0 net/socket.c:1896 __sys_connect+0x161/0x190 net/socket.c:1913 __do_sys_connect net/socket.c:1923 [inline] __se_sys_connect net/socket.c:1920 [inline] __x64_sys_connect+0x6f/0xb0 net/socket.c:1920 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 RSP: 002b:00007f9eab2b3188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 000000000056c1a8 RCX: 00000000004665f9 RDX: 0000000000000080 RSI: 0000000020000000 RDI: 0000000000000008 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c1a8 R13: 00007ffd7ed3bc7f R14: 00007f9eab2b3300 R15: 0000000000022000 INFO: task syz-executor.5:5843 blocked for more than 144 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29968 pid: 5843 ppid: 22310 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 __lock_sock+0x13d/0x260 net/core/sock.c:2644 lock_sock_nested+0xf6/0x120 net/core/sock.c:3185 lock_sock include/net/sock.h:1612 [inline] bt_sock_stream_recvmsg+0xe0/0x1030 net/bluetooth/af_bluetooth.c:345 rfcomm_sock_recvmsg+0xc3/0x280 net/bluetooth/rfcomm/sock.c:634 sock_recvmsg_nosec net/socket.c:944 [inline] sock_recvmsg net/socket.c:962 [inline] sock_recvmsg net/socket.c:958 [inline] sock_read_iter+0x33c/0x470 net/socket.c:1035 call_read_iter include/linux/fs.h:2152 [inline] new_sync_read+0x5ba/0x6e0 fs/read_write.c:404 vfs_read+0x35c/0x600 fs/read_write.c:485 ksys_read+0x1ee/0x250 fs/read_write.c:623 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 RSP: 002b:00007f9eab292188 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 000000000056c260 RCX: 00000000004665f9 RDX: 0000000000002020 RSI: 0000000020002080 RDI: 0000000000000009 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c260 R13: 00007ffd7ed3bc7f R14: 00007f9eab292300 R15: 0000000000022000 INFO: task syz-executor.5:5845 blocked for more than 144 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:30040 pid: 5845 ppid: 22310 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 __lock_sock+0x13d/0x260 net/core/sock.c:2644 lock_sock_nested+0xf6/0x120 net/core/sock.c:3185 lock_sock include/net/sock.h:1612 [inline] rfcomm_sock_shutdown+0x54/0x210 net/bluetooth/rfcomm/sock.c:928 __sys_shutdown_sock net/socket.c:2248 [inline] __sys_shutdown_sock net/socket.c:2242 [inline] __sys_shutdown+0xf1/0x1b0 net/socket.c:2260 __do_sys_shutdown net/socket.c:2268 [inline] __se_sys_shutdown net/socket.c:2266 [inline] __x64_sys_shutdown+0x50/0x70 net/socket.c:2266 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 RSP: 002b:00007f9eab271188 EFLAGS: 00000246 ORIG_RAX: 0000000000000030 RAX: ffffffffffffffda RBX: 000000000056c318 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000009 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c318 R13: 00007ffd7ed3bc7f R14: 00007f9eab271300 R15: 0000000000022000 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 1638 Comm: khungtaskd Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xd0a/0xfc0 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 18670 Comm: kworker/u4:4 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: wg-kex-wg1 wg_packet_handshake_send_worker RIP: 0010:fsqr2+0x133/0x370 arch/x86/crypto/curve25519-x86_64.c:608 Code: 89 5e 28 48 8b 57 18 c4 e2 fb f6 ca 66 4c 0f 38 f6 e8 4c 89 6e 30 66 4c 0f 38 f6 f1 4c 89 76 38 48 8b 57 20 c4 62 bb f6 77 28 <45> 31 ff c4 62 b3 f6 57 30 66 4d 0f 38 f6 ce c4 e2 fb f6 4f 38 66 RSP: 0018:ffffc90009537588 EFLAGS: 00000a02 RAX: f7efce9a9e390501 RBX: 2e42820804d7e038 RCX: db42ee5696f001db RDX: 2918464f39ce32e0 RSI: ffffc90009537668 RDI: ffffc90009537788 RBP: ffffc900095377c8 R08: 4d13b89f0c6cdf00 R09: 2ea0e369459b2793 R10: 87e577d6c4668c75 R11: be981d1282bce625 R12: ffffc90009537668 R13: a1633ecb2d26f012 R14: 042ff30405c87fce R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f83c4c0f000 CR3: 000000002d413000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: point_add_and_double+0x2ed/0x610 arch/x86/crypto/curve25519-x86_64.c:804 montgomery_ladder.constprop.0+0x385/0x560 arch/x86/crypto/curve25519-x86_64.c:887 curve25519_ever64 arch/x86/crypto/curve25519-x86_64.c:1041 [inline] curve25519_arch+0x18d/0x230 arch/x86/crypto/curve25519-x86_64.c:1388 curve25519 include/crypto/curve25519.h:39 [inline] mix_dh+0x7d/0x130 drivers/net/wireguard/noise.c:378 wg_noise_handshake_create_initiation+0x2ca/0x620 drivers/net/wireguard/noise.c:517 wg_packet_send_handshake_initiation+0x187/0x340 drivers/net/wireguard/send.c:34 wg_packet_handshake_send_worker+0x18/0x30 drivers/net/wireguard/send.c:51 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 vkms_vblank_simulate: vblank timer overrun ---------------- Code disassembly (best guess): 0: 89 5e 28 mov %ebx,0x28(%rsi) 3: 48 8b 57 18 mov 0x18(%rdi),%rdx 7: c4 e2 fb f6 ca mulx %rdx,%rax,%rcx c: 66 4c 0f 38 f6 e8 adcx %rax,%r13 12: 4c 89 6e 30 mov %r13,0x30(%rsi) 16: 66 4c 0f 38 f6 f1 adcx %rcx,%r14 1c: 4c 89 76 38 mov %r14,0x38(%rsi) 20: 48 8b 57 20 mov 0x20(%rdi),%rdx 24: c4 62 bb f6 77 28 mulx 0x28(%rdi),%r8,%r14 * 2a: 45 31 ff xor %r15d,%r15d <-- trapping instruction 2d: c4 62 b3 f6 57 30 mulx 0x30(%rdi),%r9,%r10 33: 66 4d 0f 38 f6 ce adcx %r14,%r9 39: c4 e2 fb f6 4f 38 mulx 0x38(%rdi),%rax,%rcx 3f: 66 data16