[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   34.327893] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   38.788381] random: sshd: uninitialized urandom read (32 bytes read)
[   39.215879] random: sshd: uninitialized urandom read (32 bytes read)
[   40.864526] random: sshd: uninitialized urandom read (32 bytes read)
[   53.751274] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.13' (ECDSA) to the list of known hosts.
[   59.235974] random: sshd: uninitialized urandom read (32 bytes read)
2018/07/21 23:44:10 parsed 1 programs
[   60.306394] random: cc1: uninitialized urandom read (8 bytes read)
2018/07/21 23:44:12 executed programs: 0
[   62.004701] IPVS: ftp: loaded support on port[0] = 21
[   62.016976] IPVS: ftp: loaded support on port[0] = 21
[   62.025197] IPVS: ftp: loaded support on port[0] = 21
[   62.028998] IPVS: ftp: loaded support on port[0] = 21
[   62.056430] IPVS: ftp: loaded support on port[0] = 21
[   62.064427] IPVS: ftp: loaded support on port[0] = 21
[   62.069968] IPVS: ftp: loaded support on port[0] = 21
[   62.079318] IPVS: ftp: loaded support on port[0] = 21
[   65.799921] swap_info_get: Bad swap file entry 2000000087e14
[   65.805952] BUG: Bad page map in process udevd  pte:800000021f850000 pmd:1beeca067
[   65.813817] addr:(____ptrval____) vm_flags:00100071 anon_vma:(____ptrval____) mapping:(____ptrval____) index:185
[   65.824303] file:libc-2.13.so fault:ext4_filemap_fault mmap:ext4_file_mmap readpage:ext4_readpage
[   65.833472] CPU: 0 PID: 4938 Comm: udevd Not tainted 4.18.0-rc5+ #29
[   65.840005] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   65.849587] Call Trace:
[   65.852248]  dump_stack+0x185/0x1e0
[   65.855971]  ? ext4_writepage+0x3480/0x3480
[   65.860380]  print_bad_pte+0xcae/0xde0
[   65.864346]  ? ext4_page_mkwrite+0x2a50/0x2a50
[   65.868985]  ? ext4_file_write_iter+0x2380/0x2380
[   65.873909]  unmap_page_range+0xdde/0x3c00
[   65.878266]  unmap_single_vma+0x445/0x5e0
[   65.882502]  unmap_vmas+0x1f4/0x360
[   65.886190]  exit_mmap+0x570/0xad0
[   65.889767]  ? __mmput+0x7b/0x620
[   65.893302]  __mmput+0x165/0x620
[   65.896721]  mmput+0xbb/0x110
[   65.899901]  flush_old_exec+0x1afe/0x21b0
[   65.904104]  ? kernel_read+0x13b/0x1a0
[   65.908071]  load_elf_binary+0x13e1/0x90c0
[   65.912412]  ? kmsan_set_origin_inline+0x6b/0x120
[   65.917350]  ? __msan_poison_alloca+0x183/0x220
[   65.922071]  ? search_binary_handler+0x231/0xac0
[   65.926882]  ? load_elf_binary+0x4c41/0x90c0
[   65.931385]  ? try_module_get+0x6e/0x3f0
[   65.935547]  ? search_binary_handler+0x231/0xac0
[   65.940396]  ? try_module_get+0x6e/0x3f0
[   65.944660]  ? load_script+0xd00/0xd00
[   65.948639]  search_binary_handler+0x2f4/0xac0
[   65.953315]  __do_execve_file+0x1f70/0x3020
[   65.957745]  __x64_sys_execve+0x131/0x180
[   65.961975]  ? set_binfmt+0x1b0/0x1b0
[   65.965845]  do_syscall_64+0x15b/0x230
[   65.969785]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   65.975008] RIP: 0033:0x7fa846729207
[   65.978731] Code: Bad RIP value.
[   65.982147] RSP: 002b:00007ffd98d697e8 EFLAGS: 00000206 ORIG_RAX: 000000000000003b
[   65.990086] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007fa846729207
[   65.997401] RDX: 0000000002334440 RSI: 00007ffd98d698e0 RDI: 00007ffd98d6a8f0
[   66.004713] RBP: 0000000000625500 R08: 0000000000001290 R09: 0000000000001290
[   66.012012] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000002334440
[   66.019321] R13: 0000000000000007 R14: 0000000002333250 R15: 0000000000000005
[   66.026896] Disabling lock debugging due to kernel taint
[   66.068195] BUG: Bad rss-counter state mm:(____ptrval____) idx:1 val:1
[   66.075109] BUG: Bad rss-counter state mm:(____ptrval____) idx:2 val:-1
2018/07/21 23:44:17 executed programs: 132