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 syzkaller login: [ 30.888264] ================================================================== [ 30.895663] BUG: KMSAN: uninit-value in load_script+0x3ae/0xcd0 [ 30.901696] CPU: 1 PID: 3568 Comm: syzkaller804578 Not tainted 4.16.0+ #82 [ 30.908681] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.918008] Call Trace: [ 30.920583] dump_stack+0x185/0x1d0 [ 30.924185] ? load_script+0x3ae/0xcd0 [ 30.928047] kmsan_report+0x142/0x240 [ 30.931835] __msan_warning_32+0x6c/0xb0 [ 30.935886] ? search_binary_handler+0x220/0xac0 [ 30.940630] load_script+0x3ae/0xcd0 [ 30.944319] ? bm_evict_inode+0x1a0/0x1a0 [ 30.948440] search_binary_handler+0x2ef/0xac0 [ 30.953000] do_execveat_common+0x1f4d/0x2ce0 [ 30.957473] SYSC_execve+0xe2/0x110 [ 30.961085] SyS_execve+0x56/0x80 [ 30.964512] do_syscall_64+0x309/0x430 [ 30.968375] ? set_binfmt+0x1b0/0x1b0 [ 30.972152] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 30.977316] RIP: 0033:0x440c59 [ 30.980480] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 000000000000003b [ 30.988160] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440c59 [ 30.995403] RDX: 0000000020000300 RSI: 0000000020000640 RDI: 0000000020000000 [ 31.002648] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 31.009889] R10: 0000000120080522 R11: 0000000000000217 R12: 00000000004023f0 [ 31.017135] R13: 0000000000402480 R14: 0000000000000000 R15: 0000000000000000 [ 31.024379] [ 31.025978] Uninit was stored to memory at: [ 31.030277] kmsan_internal_chain_origin+0x12b/0x210 [ 31.035355] kmsan_memcpy_origins+0x11d/0x170 [ 31.039829] __msan_memcpy+0x19f/0x1f0 [ 31.043691] _copy_to_iter+0xea2/0x28f0 [ 31.047638] copy_page_to_iter+0x383/0x1b70 [ 31.051935] shmem_file_read_iter+0x99f/0x1180 [ 31.056491] __vfs_read+0x6fb/0x8e0 [ 31.060091] vfs_read+0x36c/0x6c0 [ 31.063517] kernel_read+0x11f/0x1a0 [ 31.067207] prepare_binprm+0x982/0xad0 [ 31.071154] do_execveat_common+0x1b35/0x2ce0 [ 31.075623] SYSC_execve+0xe2/0x110 [ 31.079222] SyS_execve+0x56/0x80 [ 31.082644] do_syscall_64+0x309/0x430 [ 31.086512] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.091678] Uninit was created at: [ 31.095197] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 31.100196] kmsan_alloc_page+0x82/0xe0 [ 31.104146] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 31.108875] alloc_pages_vma+0xcc8/0x1800 [ 31.112996] shmem_alloc_and_acct_page+0x6d5/0x1000 [ 31.117984] shmem_getpage_gfp+0x35db/0x5770 [ 31.122367] shmem_file_read_iter+0x508/0x1180 [ 31.126923] __vfs_read+0x6fb/0x8e0 [ 31.130521] vfs_read+0x36c/0x6c0 [ 31.133946] kernel_read+0x11f/0x1a0 [ 31.137634] prepare_binprm+0x982/0xad0 [ 31.141678] do_execveat_common+0x1b35/0x2ce0 [ 31.146148] SYSC_execve+0xe2/0x110 [ 31.149749] SyS_execve+0x56/0x80 [ 31.153177] do_syscall_64+0x309/0x430 [ 31.157037] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.162197] ================================================================== [ 31.169524] Disabling lock debugging due to kernel taint [ 31.174943] Kernel panic - not syncing: panic_on_warn set ... [ 31.174943] [ 31.182282] CPU: 1 PID: 3568 Comm: syzkaller804578 Tainted: G B 4.16.0+ #82 [ 31.190565] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.199891] Call Trace: [ 31.202457] dump_stack+0x185/0x1d0 [ 31.206060] panic+0x39d/0x940 [ 31.209235] ? load_script+0x3ae/0xcd0 [ 31.213095] kmsan_report+0x238/0x240 [ 31.216870] __msan_warning_32+0x6c/0xb0 [ 31.220905] ? search_binary_handler+0x220/0xac0 [ 31.225632] load_script+0x3ae/0xcd0 [ 31.229324] ? bm_evict_inode+0x1a0/0x1a0 [ 31.233446] search_binary_handler+0x2ef/0xac0 [ 31.238004] do_execveat_common+0x1f4d/0x2ce0 [ 31.242480] SYSC_execve+0xe2/0x110 [ 31.246081] SyS_execve+0x56/0x80 [ 31.249510] do_syscall_64+0x309/0x430 [ 31.253373] ? set_binfmt+0x1b0/0x1b0 [ 31.257149] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 31.262310] RIP: 0033:0x440c59 [ 31.265472] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 000000000000003b [ 31.273154] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440c59 [ 31.280396] RDX: 0000000020000300 RSI: 0000000020000640 RDI: 0000000020000000 [ 31.287638] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 31.294880] R10: 0000000120080522 R11: 0000000000000217 R12: 00000000004023f0 [ 31.302122] R13: 0000000000402480 R14: 0000000000000000 R15: 0000000000000000 [ 31.309754] Dumping ftrace buffer: [ 31.313275] (ftrace buffer empty) [ 31.316956] Kernel Offset: disabled [ 31.320554] Rebooting in 86400 seconds..