[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.207' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 54.467489][ T7060] general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN [ 54.479237][ T7060] KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf] [ 54.487630][ T7060] CPU: 1 PID: 7060 Comm: syz-executor394 Not tainted 5.7.0-rc6-syzkaller #0 [ 54.496286][ T7060] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.506343][ T7060] RIP: 0010:__tipc_sendstream+0xbde/0x11f0 [ 54.512139][ T7060] Code: 00 00 00 00 48 39 5c 24 28 48 0f 44 d8 e8 fa 3e db f9 48 b8 00 00 00 00 00 fc ff df 48 8d bb c8 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 e2 04 00 00 48 8b 9b c8 00 00 00 48 b8 00 00 00 [ 54.531732][ T7060] RSP: 0018:ffffc90003ef7818 EFLAGS: 00010202 [ 54.537785][ T7060] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8797fd9d [ 54.545742][ T7060] RDX: 0000000000000019 RSI: ffffffff8797fde6 RDI: 00000000000000c8 [ 54.553686][ T7060] RBP: ffff888099848040 R08: ffff88809a5f6440 R09: fffffbfff1860b4c [ 54.561627][ T7060] R10: ffffffff8c305a5f R11: fffffbfff1860b4b R12: ffff88809984857e [ 54.569567][ T7060] R13: 0000000000000000 R14: ffff888086aa4000 R15: 0000000000000000 [ 54.577511][ T7060] FS: 00000000009b4880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 54.586407][ T7060] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.592960][ T7060] CR2: 0000000020000140 CR3: 00000000a7fdf000 CR4: 00000000001406e0 [ 54.600902][ T7060] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.608883][ T7060] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 54.616830][ T7060] Call Trace: [ 54.620103][ T7060] ? tipc_connect+0xb90/0xb90 [ 54.624751][ T7060] ? do_raw_spin_lock+0x129/0x2e0 [ 54.629745][ T7060] ? prepare_to_wait_exclusive+0x2c0/0x2c0 [ 54.635572][ T7060] ? mark_held_locks+0x9f/0xe0 [ 54.640304][ T7060] ? __local_bh_enable_ip+0x159/0x270 [ 54.645647][ T7060] tipc_sendstream+0x4c/0x70 [ 54.650206][ T7060] ? __tipc_sendstream+0x11f0/0x11f0 [ 54.655461][ T7060] sock_sendmsg+0xcf/0x120 [ 54.659846][ T7060] ____sys_sendmsg+0x32f/0x810 [ 54.664580][ T7060] ? kernel_sendmsg+0x50/0x50 [ 54.669239][ T7060] ? __lock_acquire+0x2184/0x4c50 [ 54.674235][ T7060] ___sys_sendmsg+0x100/0x170 [ 54.678880][ T7060] ? sendmsg_copy_msghdr+0x70/0x70 [ 54.683963][ T7060] ? find_held_lock+0x2d/0x110 [ 54.688701][ T7060] ? __might_fault+0x11f/0x1d0 [ 54.693436][ T7060] ? apparmor_path_rename+0xd10/0xd10 [ 54.698775][ T7060] ? kmem_cache_alloc+0x358/0x740 [ 54.703782][ T7060] ? lock_downgrade+0x840/0x840 [ 54.708600][ T7060] ? lockdep_init_map_waits+0x26a/0x890 [ 54.714120][ T7060] __sys_sendmmsg+0x195/0x480 [ 54.718769][ T7060] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 54.723776][ T7060] ? lock_downgrade+0x840/0x840 [ 54.728597][ T7060] ? rcu_read_lock_sched_held+0x1/0xd0 [ 54.734027][ T7060] ? __fd_install+0x1e6/0x600 [ 54.738673][ T7060] ? __sys_socketpair+0x3ee/0x560 [ 54.743669][ T7060] ? __ia32_sys_read+0xb0/0xb0 [ 54.748403][ T7060] __x64_sys_sendmmsg+0x99/0x100 [ 54.753311][ T7060] ? lockdep_hardirqs_on+0x463/0x620 [ 54.758565][ T7060] do_syscall_64+0xf6/0x7d0 [ 54.763040][ T7060] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 54.768901][ T7060] RIP: 0033:0x440199 [ 54.772782][ T7060] 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 [ 54.792359][ T7060] RSP: 002b:00007ffe74856df8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 54.800737][ T7060] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440199 [ 54.808691][ T7060] RDX: 0492492492492619 RSI: 0000000020003240 RDI: 0000000000000003 [ 54.816631][ T7060] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 54.824579][ T7060] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a20 [ 54.832524][ T7060] R13: 0000000000401ab0 R14: 0000000000000000 R15: 0000000000000000 [ 54.840519][ T7060] Modules linked in: [ 54.844975][ T7060] ---[ end trace 0d2e71066c248d44 ]--- [ 54.850447][ T7060] RIP: 0010:__tipc_sendstream+0xbde/0x11f0 [ 54.856336][ T7060] Code: 00 00 00 00 48 39 5c 24 28 48 0f 44 d8 e8 fa 3e db f9 48 b8 00 00 00 00 00 fc ff df 48 8d bb c8 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 e2 04 00 00 48 8b 9b c8 00 00 00 48 b8 00 00 00 [ 54.875993][ T7060] RSP: 0018:ffffc90003ef7818 EFLAGS: 00010202 [ 54.882114][ T7060] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8797fd9d [ 54.890093][ T7060] RDX: 0000000000000019 RSI: ffffffff8797fde6 RDI: 00000000000000c8 [ 54.898093][ T7060] RBP: ffff888099848040 R08: ffff88809a5f6440 R09: fffffbfff1860b4c [ 54.906105][ T7060] R10: ffffffff8c305a5f R11: fffffbfff1860b4b R12: ffff88809984857e [ 54.914106][ T7060] R13: 0000000000000000 R14: ffff888086aa4000 R15: 0000000000000000 [ 54.922104][ T7060] FS: 00000000009b4880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 54.931015][ T7060] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.937635][ T7060] CR2: 0000000020000140 CR3: 00000000a7fdf000 CR4: 00000000001406e0 [ 54.945667][ T7060] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.953670][ T7060] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 54.962196][ T7060] Kernel panic - not syncing: Fatal exception [ 54.969419][ T7060] Kernel Offset: disabled [ 54.973730][ T7060] Rebooting in 86400 seconds..