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 '10.128.0.53' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 39.110865] Not allocated shadow for addr ffff8801b8c0f000 (page ffffea000a5485a0) [ 39.118591] Attempted to access 4096 bytes [ 39.122816] ------------[ cut here ]------------ [ 39.127545] kernel BUG at mm/kmsan/kmsan.c:1326! [ 39.132282] invalid opcode: 0000 [#1] SMP PTI [ 39.136750] Dumping ftrace buffer: [ 39.140266] (ftrace buffer empty) [ 39.143959] Modules linked in: [ 39.147134] CPU: 0 PID: 4278 Comm: syzkaller168294 Not tainted 4.16.0+ #83 [ 39.154117] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.163459] RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0 [ 39.169065] RSP: 0018:ffff8801d009f4c0 EFLAGS: 00010082 [ 39.174416] RAX: 000000000000001e RBX: 00000000000006e0 RCX: 0000000000000000 [ 39.181676] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000 [ 39.188931] RBP: ffff8801d009f4d8 R08: 0000000000000000 R09: 0000000000000001 [ 39.196176] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801b8c0f000 [ 39.203434] R13: 0000000000001000 R14: 0000000000000001 R15: 0000000000001000 [ 39.210689] FS: 00000000026ae880(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 39.218890] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.224748] CR2: 0000000020b9c000 CR3: 00000001a209c000 CR4: 00000000001406f0 [ 39.231995] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.239256] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.246530] Call Trace: [ 39.249106] kmsan_internal_unpoison_shadow+0x5c/0xe0 [ 39.254289] kmsan_unpoison_shadow+0x66/0xb0 [ 39.258681] get_user_pages_fast+0x47b/0x760 [ 39.263082] iov_iter_get_pages+0x465/0x1810 [ 39.267485] af_alg_make_sg+0xdf/0x6d0 [ 39.271352] ? trace_kmalloc+0xa3/0x2b0 [ 39.275304] ? __kmalloc+0x20c/0x350 [ 39.279000] ? __list_add_valid+0xb8/0x450 [ 39.283224] af_alg_get_rsgl+0x746/0xe10 [ 39.287274] skcipher_recvmsg+0x546/0x1940 [ 39.291493] ? release_sock+0x237/0x2a0 [ 39.295455] skcipher_recvmsg_nokey+0x129/0x160 [ 39.300103] sock_recvmsg+0x1d0/0x230 [ 39.303885] ? skcipher_sendmsg_nokey+0x1f0/0x1f0 [ 39.308707] ___sys_recvmsg+0x3fb/0x810 [ 39.312664] ? __fget_light+0x56/0x710 [ 39.316528] ? __fdget+0x4e/0x60 [ 39.319879] ? __fget_light+0x1dc/0x710 [ 39.323830] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 39.329178] ? __fget_light+0x1f5/0x710 [ 39.333134] SYSC_recvmsg+0x298/0x3c0 [ 39.336915] SyS_recvmsg+0x54/0x80 [ 39.340436] do_syscall_64+0x309/0x430 [ 39.344302] ? ___sys_recvmsg+0x810/0x810 [ 39.348433] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 39.353602] RIP: 0033:0x442029 [ 39.356776] RSP: 002b:00007ffdcbf73b28 EFLAGS: 00000217 ORIG_RAX: 000000000000002f [ 39.364459] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442029 [ 39.371706] RDX: 0000000000000000 RSI: 0000000020158000 RDI: 0000000000000004 [ 39.378961] RBP: 0000000000000000 R08: 00007ffdcbf73ce8 R09: 00007ffdcbf73ce8 [ 39.386207] R10: 0000000000000010 R11: 0000000000000217 R12: 00000000000002a7 [ 39.393457] R13: 00000000000098b8 R14: 0000000000000000 R15: 0000000000000000 [ 39.400712] 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 [ 39.419825] RIP: kmsan_get_shadow_address+0x1ce/0x1f0 RSP: ffff8801d009f4c0 [ 39.426921] ---[ end trace e917164bfd51437e ]--- [ 39.431664] Kernel panic - not syncing: Fatal exception [ 39.437446] Dumping ftrace buffer: [ 39.440964] (ftrace buffer empty) [ 39.444646] Kernel Offset: disabled [ 39.448247] Rebooting in 86400 seconds..