[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.6' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.110844][ T6808] ------------[ cut here ]------------ [ 55.116739][ T6808] WARNING: CPU: 0 PID: 6808 at include/linux/thread_info.h:150 tipc_msg_append+0x49a/0x5e0 [ 55.126698][ T6808] Kernel panic - not syncing: panic_on_warn set ... [ 55.133268][ T6808] CPU: 0 PID: 6808 Comm: syz-executor028 Not tainted 5.7.0-syzkaller #0 [ 55.141586][ T6808] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.151627][ T6808] Call Trace: [ 55.154920][ T6808] dump_stack+0x188/0x20d [ 55.159237][ T6808] ? tipc_msg_append+0x3f0/0x5e0 [ 55.164245][ T6808] panic+0x2e3/0x75c [ 55.168164][ T6808] ? add_taint.cold+0x16/0x16 [ 55.172853][ T6808] ? printk+0xba/0xed [ 55.176870][ T6808] ? kmsg_dump_rewind_nolock+0xd9/0xd9 [ 55.182328][ T6808] ? __warn.cold+0x14/0x35 [ 55.186721][ T6808] ? __warn+0xd5/0x1c8 [ 55.190943][ T6808] ? tipc_msg_append+0x49a/0x5e0 [ 55.195883][ T6808] __warn.cold+0x2f/0x35 [ 55.200105][ T6808] ? tipc_msg_append+0x49a/0x5e0 [ 55.205035][ T6808] report_bug+0x27b/0x2f0 [ 55.209346][ T6808] do_error_trap+0x12b/0x220 [ 55.213951][ T6808] ? tipc_msg_append+0x49a/0x5e0 [ 55.218889][ T6808] do_invalid_op+0x32/0x40 [ 55.223290][ T6808] ? tipc_msg_append+0x49a/0x5e0 [ 55.228223][ T6808] invalid_op+0x23/0x30 [ 55.232360][ T6808] RIP: 0010:tipc_msg_append+0x49a/0x5e0 [ 55.237882][ T6808] Code: 18 48 89 f8 48 c1 e8 03 42 80 3c 38 00 0f 85 2e 01 00 00 49 83 7e 18 00 0f 84 d4 fc ff ff e8 4d e7 da f9 0f 0b e8 46 e7 da f9 <0f> 0b 41 bc f2 ff ff ff e8 39 e7 da f9 44 89 e0 48 83 c4 50 5b 5d [ 55.257472][ T6808] RSP: 0018:ffffc90001627770 EFLAGS: 00010293 [ 55.263549][ T6808] RAX: ffff88808efd0580 RBX: 0000000000000018 RCX: ffffffff8798a901 [ 55.271516][ T6808] RDX: 0000000000000000 RSI: ffffffff8798aaaa RDI: 0000000000000007 [ 55.279468][ T6808] RBP: ffffffffffffffe8 R08: ffff88808efd0580 R09: ffffed1012e78f1d [ 55.287421][ T6808] R10: ffff8880973c78e7 R11: ffffed1012e78f1c R12: ffff8880973c78e8 [ 55.295378][ T6808] R13: ffff8880973c78d0 R14: ffff888095fbecc0 R15: dffffc0000000000 [ 55.303346][ T6808] ? tipc_msg_append+0x2f1/0x5e0 [ 55.308260][ T6808] ? tipc_msg_append+0x49a/0x5e0 [ 55.313188][ T6808] __tipc_sendstream+0xac3/0x1200 [ 55.318210][ T6808] ? tipc_connect+0xb90/0xb90 [ 55.322896][ T6808] ? prepare_to_wait_exclusive+0x2c0/0x2c0 [ 55.328760][ T6808] ? __local_bh_enable_ip+0x159/0x270 [ 55.334125][ T6808] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 55.340091][ T6808] ? lock_sock_nested+0x94/0x110 [ 55.345016][ T6808] ? lock_sock_nested+0x94/0x110 [ 55.349947][ T6808] tipc_sendstream+0x4c/0x70 [ 55.354547][ T6808] tipc_send_packet+0x3c/0x60 [ 55.359213][ T6808] ? tipc_sendstream+0x70/0x70 [ 55.363995][ T6808] sock_sendmsg+0xcf/0x120 [ 55.368410][ T6808] ____sys_sendmsg+0x32f/0x810 [ 55.373157][ T6808] ? kernel_sendmsg+0x50/0x50 [ 55.377818][ T6808] ? __lock_acquire+0x2226/0x4a70 [ 55.382851][ T6808] ___sys_sendmsg+0x100/0x170 [ 55.387507][ T6808] ? sendmsg_copy_msghdr+0x70/0x70 [ 55.392608][ T6808] ? find_held_lock+0x2d/0x110 [ 55.397387][ T6808] ? print_usage_bug+0x240/0x240 [ 55.402318][ T6808] ? do_huge_pmd_anonymous_page+0xb65/0x1940 [ 55.408290][ T6808] ? find_held_lock+0x2d/0x110 [ 55.413036][ T6808] ? __might_fault+0x11f/0x1d0 [ 55.417780][ T6808] ? lock_downgrade+0x840/0x840 [ 55.422633][ T6808] __sys_sendmmsg+0x195/0x480 [ 55.427292][ T6808] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 55.432305][ T6808] ? up_read+0x1ab/0x750 [ 55.436664][ T6808] ? down_read_nested+0x420/0x420 [ 55.441694][ T6808] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 55.447173][ T6808] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 55.453155][ T6808] __x64_sys_sendmmsg+0x99/0x100 [ 55.458103][ T6808] do_syscall_64+0xf6/0x7d0 [ 55.462610][ T6808] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 55.468512][ T6808] RIP: 0033:0x4401e9 [ 55.472397][ T6808] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 55.492114][ T6808] RSP: 002b:00007fff7b6a58b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 55.500522][ T6808] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401e9 [ 55.508487][ T6808] RDX: 04924924924926c8 RSI: 0000000020236fc8 RDI: 0000000000000004 [ 55.516456][ T6808] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 55.524421][ T6808] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a70 [ 55.532386][ T6808] R13: 0000000000401b00 R14: 0000000000000000 R15: 0000000000000000 [ 55.541864][ T6808] Kernel Offset: disabled [ 55.546266][ T6808] Rebooting in 86400 seconds..