INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.25' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 236.625128] Not allocated shadow for addr ffff8801dcb34000 (page ffffea000b2c3380) [ 236.632865] Attempted to access 3174 bytes [ 236.637091] ------------[ cut here ]------------ [ 236.641821] kernel BUG at mm/kmsan/kmsan.c:1326! [ 236.646567] invalid opcode: 0000 [#1] SMP PTI [ 236.651042] Dumping ftrace buffer: [ 236.654553] (ftrace buffer empty) [ 236.658244] Modules linked in: [ 236.661423] CPU: 1 PID: 3560 Comm: sshd Not tainted 4.16.0+ #83 [ 236.667449] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 236.676796] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0 [ 236.682388] RSP: 0018:ffff8801b142e638 EFLAGS: 00010086 [ 236.687723] RAX: 000000000000001e RBX: 0000000000000760 RCX: 0000000000000000 [ 236.694971] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000 [ 236.702214] RBP: ffff8801b142e650 R08: 0000000000000000 R09: 0000000000000001 [ 236.709456] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dcb34000 [ 236.716702] R13: 0000000000000c66 R14: 0000000000000001 R15: 0000000000000c66 [ 236.723956] FS: 00007ff912f4d7c0(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 236.732162] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 236.738023] CR2: 00000000004a1624 CR3: 00000001cc160000 CR4: 00000000001406e0 [ 236.745267] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 236.752519] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 236.759765] Call Trace: [ 236.762343] kmsan_internal_unpoison_shadow+0x5c/0xe0 [ 236.767515] kmsan_unpoison_shadow+0x66/0xb0 [ 236.771907] virtqueue_get_buf_ctx+0x742/0xa20 [ 236.776478] virtqueue_get_buf+0x72/0x90 [ 236.780526] start_xmit+0x276/0x2840 [ 236.784259] ? virtnet_close+0x2c0/0x2c0 [ 236.788306] dev_hard_start_xmit+0x5f1/0xc70 [ 236.792702] sch_direct_xmit+0x540/0x8f0 [ 236.796756] __qdisc_run+0x1785/0x3730 [ 236.800639] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 236.805981] __dev_queue_xmit+0x174a/0x2b60 [ 236.810293] dev_queue_xmit+0x4b/0x60 [ 236.814080] ip_finish_output2+0x1198/0x1380 [ 236.818475] ip_finish_output+0xcb0/0xff0 [ 236.822611] ip_output+0x502/0x5c0 [ 236.826136] ? ip_mc_finish_output+0x3b0/0x3b0 [ 236.830693] ? ip_finish_output+0xff0/0xff0 [ 236.834988] ip_queue_xmit+0x1fae/0x21c0 [ 236.839030] ? __ip_local_out+0x5b0/0x5b0 [ 236.843158] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 236.848588] ? __skb_clone+0x6de/0x980 [ 236.852449] ? ip_output+0x5c0/0x5c0 [ 236.856134] tcp_transmit_skb+0x38be/0x51f0 [ 236.860432] tcp_write_xmit+0x4311/0xb920 [ 236.864567] __tcp_push_pending_frames+0x124/0x3f0 [ 236.869469] tcp_push+0x8b6/0x9c0 [ 236.872900] tcp_sendmsg_locked+0x5445/0x6d20 [ 236.877381] tcp_sendmsg+0xb2/0x100 [ 236.880982] ? tcp_sendmsg_locked+0x6d20/0x6d20 [ 236.885624] inet_sendmsg+0x48d/0x740 [ 236.889397] ? security_socket_sendmsg+0x9e/0x210 [ 236.894212] ? inet_getname+0x500/0x500 [ 236.898160] sock_write_iter+0x3b9/0x470 [ 236.902194] ? sock_read_iter+0x480/0x480 [ 236.906314] __vfs_write+0x719/0x910 [ 236.910010] vfs_write+0x463/0x8d0 [ 236.913527] SYSC_write+0x172/0x360 [ 236.917128] SyS_write+0x55/0x80 [ 236.920466] do_syscall_64+0x309/0x430 [ 236.924328] ? SYSC_read+0x360/0x360 [ 236.928019] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 236.933180] RIP: 0033:0x7ff9112e8370 [ 236.936860] RSP: 002b:00007ffd615cd2a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 236.944537] RAX: ffffffffffffffda RBX: 0000000000000078 RCX: 00007ff9112e8370 [ 236.951780] RDX: 0000000000000078 RSI: 0000560d1d3fb210 RDI: 0000000000000003 [ 236.959021] RBP: 0000560d1d3fb210 R08: 0000000000000001 R09: 7475636578650a6d [ 236.966263] R10: 676f727020676e69 R11: 0000000000000246 R12: 00007ffd615cd30c [ 236.973512] R13: 0000560d1bf3dfb4 R14: 0000000000000028 R15: 0000560d1bf3fca0 [ 236.980756] Code: 75 29 48 c7 c7 71 2a a1 87 31 c0 e8 0d 11 86 ff 80 3c 25 a8 a4 2d 88 00 75 11 48 c7 c7 a1 2a a1 87 31 c0 4c 89 fe e8 f2 10 86 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 [ 236.999843] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801b142e638 [ 237.006916] ---[ end trace da23f09e4749ebee ]--- [ 237.011641] Kernel panic - not syncing: Fatal exception in interrupt [ 237.018490] Dumping ftrace buffer: [ 237.022006] (ftrace buffer empty) [ 237.025685] Kernel Offset: disabled [ 237.029282] Rebooting in 86400 seconds..