[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.93' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program syzkaller login: [ 82.869242][ T6856] ------------[ cut here ]------------ [ 82.875034][ T6856] kernel BUG at net/rxrpc/recvmsg.c:605! [ 82.880676][ T6856] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 82.886725][ T6856] CPU: 0 PID: 6856 Comm: syz-executor134 Not tainted 5.8.0-rc3-next-20200701-syzkaller #0 [ 82.896603][ T6856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.906680][ T6856] RIP: 0010:rxrpc_recvmsg+0x18ab/0x1a03 [ 82.912230][ T6856] Code: 89 e7 e8 58 39 6b fa e9 eb fc ff ff e8 4e 39 6b fa e9 33 ef ff ff 48 8b 7c 24 10 e8 3f 39 6b fa e9 dc ee ff ff e8 35 a4 2b fa <0f> 0b 48 8b 7c 24 10 e8 29 39 6b fa e9 76 ee ff ff 48 89 ef e8 0c [ 82.931821][ T6856] RSP: 0018:ffffc90001637858 EFLAGS: 00010293 [ 82.937872][ T6856] RAX: 0000000000000000 RBX: ffff8880a182c278 RCX: ffffffff874835d7 [ 82.945826][ T6856] RDX: ffff888096f4c000 RSI: ffffffff8748473b RDI: 0000000000000001 [ 82.953779][ T6856] RBP: ffff888096ffe740 R08: 0000000000000000 R09: ffff8880a182c327 [ 82.961746][ T6856] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 82.969710][ T6856] R13: ffff8880a182c080 R14: 0000000000000000 R15: ffff8880a182c320 [ 82.977690][ T6856] FS: 00007f23bbcf5700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 82.986614][ T6856] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.993189][ T6856] CR2: 00000000006da0f0 CR3: 000000009ec2f000 CR4: 00000000001506f0 [ 83.001154][ T6856] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.009107][ T6856] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.017063][ T6856] Call Trace: [ 83.021772][ T6856] ? rxrpc_abort_call+0x60/0x60 [ 83.026616][ T6856] ? __might_fault+0xef/0x1d0 [ 83.031289][ T6856] ? find_held_lock+0x2d/0x110 [ 83.036042][ T6856] ? aa_af_perm+0x230/0x230 [ 83.040539][ T6856] ? __might_fault+0x11f/0x1d0 [ 83.045285][ T6856] ? finish_wait+0x260/0x260 [ 83.049863][ T6856] ? security_socket_recvmsg+0x8f/0xc0 [ 83.055305][ T6856] ? rxrpc_abort_call+0x60/0x60 [ 83.060156][ T6856] ____sys_recvmsg+0x2c4/0x640 [ 83.064908][ T6856] ? move_addr_to_kernel.part.0+0x110/0x110 [ 83.070789][ T6856] ? __copy_msghdr_from_user+0x2b4/0x4b0 [ 83.076438][ T6856] ? import_iovec+0x23b/0x3d0 [ 83.081105][ T6856] ? compat_import_iovec+0x3d0/0x3d0 [ 83.086377][ T6856] ___sys_recvmsg+0x127/0x200 [ 83.091063][ T6856] ? __copy_msghdr_from_user+0x4b0/0x4b0 [ 83.096683][ T6856] ? lock_downgrade+0x820/0x820 [ 83.101543][ T6856] ? __fget_files+0x294/0x400 [ 83.106212][ T6856] ? __fget_light+0xea/0x280 [ 83.110821][ T6856] do_recvmmsg+0x24d/0x6d0 [ 83.115244][ T6856] ? ___sys_recvmsg+0x200/0x200 [ 83.120104][ T6856] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 83.126073][ T6856] ? lock_acquire+0x1f1/0xad0 [ 83.130740][ T6856] ? find_held_lock+0x2d/0x110 [ 83.135486][ T6856] ? calculate_sigpending+0x42/0xa0 [ 83.140666][ T6856] ? find_held_lock+0x2d/0x110 [ 83.145411][ T6856] __x64_sys_recvmmsg+0x20b/0x260 [ 83.150417][ T6856] ? __do_sys_socketcall+0x550/0x550 [ 83.155699][ T6856] ? lock_is_held_type+0xb0/0xe0 [ 83.160638][ T6856] ? do_syscall_64+0x1c/0xe0 [ 83.165213][ T6856] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 83.171268][ T6856] do_syscall_64+0x60/0xe0 [ 83.175699][ T6856] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 83.181580][ T6856] RIP: 0033:0x446899 [ 83.185448][ T6856] Code: Bad RIP value. [ 83.189558][ T6856] RSP: 002b:00007f23bbcf4d98 EFLAGS: 00000246 ORIG_RAX: 000000000000012b [ 83.197965][ T6856] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446899 [ 83.205919][ T6856] RDX: 0000000000000001 RSI: 0000000020000100 RDI: 0000000000000003 [ 83.213872][ T6856] RBP: 00000000006dbc30 R08: 0000000000000000 R09: 0000000000000000 [ 83.221825][ T6856] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c [ 83.229849][ T6856] R13: 0000000000000007 R14: 0000000100000110 R15: 0000000000000018 [ 83.237812][ T6856] Modules linked in: [ 83.242000][ T6856] ---[ end trace abf499f6a2f7b5ae ]--- [ 83.247512][ T6856] RIP: 0010:rxrpc_recvmsg+0x18ab/0x1a03 [ 83.253065][ T6856] Code: 89 e7 e8 58 39 6b fa e9 eb fc ff ff e8 4e 39 6b fa e9 33 ef ff ff 48 8b 7c 24 10 e8 3f 39 6b fa e9 dc ee ff ff e8 35 a4 2b fa <0f> 0b 48 8b 7c 24 10 e8 29 39 6b fa e9 76 ee ff ff 48 89 ef e8 0c [ 83.272758][ T6856] RSP: 0018:ffffc90001637858 EFLAGS: 00010293 [ 83.278929][ T6856] RAX: 0000000000000000 RBX: ffff8880a182c278 RCX: ffffffff874835d7 [ 83.286960][ T6856] RDX: ffff888096f4c000 RSI: ffffffff8748473b RDI: 0000000000000001 [ 83.295025][ T6856] RBP: ffff888096ffe740 R08: 0000000000000000 R09: ffff8880a182c327 [ 83.302994][ T6856] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 83.311026][ T6856] R13: ffff8880a182c080 R14: 0000000000000000 R15: ffff8880a182c320 [ 83.319073][ T6856] FS: 00007f23bbcf5700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 83.328056][ T6856] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.334697][ T6856] CR2: 00000000006da0f0 CR3: 000000009ec2f000 CR4: 00000000001506f0 [ 83.342672][ T6856] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.350700][ T6856] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.358742][ T6856] Kernel panic - not syncing: Fatal exception [ 83.365994][ T6856] Kernel Offset: disabled [ 83.370316][ T6856] Rebooting in 86400 seconds..