[ 15.572944] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.098190] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 21.359995] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 22.112854] random: sshd: uninitialized urandom read (32 bytes read, 95 bits of entropy available) [ 22.272930] random: sshd: uninitialized urandom read (32 bytes read, 99 bits of entropy available) Warning: Permanently added 'ci-android-44-kasan-gce-386-0,10.128.0.93' (ECDSA) to the list of known hosts. [ 27.658532] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available) executing program [ 27.752196] ================================================================== [ 27.759571] BUG: KASAN: stack-out-of-bounds in strlcpy+0x101/0x120 [ 27.765853] Read of size 1 at addr ffff8801d0d6facc by task syzkaller117385/3321 [ 27.773346] [ 27.774943] CPU: 0 PID: 3321 Comm: syzkaller117385 Not tainted 4.4.107-g610c835 #4 [ 27.782612] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.791929] 0000000000000000 03c9e146d30cb769 ffff8801d0d6f9a8 ffffffff81d0457d [ 27.799868] ffffea0007435bc0 ffff8801d0d6facc 0000000000000000 ffff8801d0d6facc [ 27.807821] ffff8801d0d6fbb0 ffff8801d0d6f9e0 ffffffff814fbb23 ffff8801d0d6facc [ 27.815762] Call Trace: [ 27.818314] [] dump_stack+0xc1/0x124 [ 27.823653] [] print_address_description+0x73/0x260 [ 27.830281] [] kasan_report+0x285/0x370 [ 27.835866] [] ? strlcpy+0x101/0x120 [ 27.841191] [] __asan_report_load1_noabort+0x14/0x20 [ 27.847906] [] strlcpy+0x101/0x120 [ 27.853058] [] xt_copy_counters_from_user+0x152/0x2c0 [ 27.859858] [] ? xt_compat_target_to_user+0x3a0/0x3a0 [ 27.866661] [] ? mark_held_locks+0xaf/0x100 [ 27.872596] [] ? mutex_lock_nested+0x5d4/0x850 [ 27.878797] [] do_add_counters+0x96/0x590 [ 27.884557] [] ? __do_replace+0x6d0/0x6d0 [ 27.890318] [] ? security_capable+0x8e/0xc0 [ 27.896263] [] ? ns_capable_common+0xcf/0x160 [ 27.902372] [] compat_do_ipt_set_ctl+0xbf/0x150 [ 27.908655] [] compat_nf_setsockopt+0x88/0x130 [ 27.914848] [] ? compat_do_replace.isra.15+0x410/0x410 [ 27.921735] [] compat_ip_setsockopt+0x9d/0xf0 [ 27.927842] [] compat_udp_setsockopt+0x45/0x80 [ 27.934037] [] ? udp_lib_setsockopt+0x560/0x560 [ 27.940320] [] compat_ipv6_setsockopt+0xb2/0x1e0 [ 27.946689] [] inet_csk_compat_setsockopt+0x95/0x120 [ 27.953404] [] ? ipv6_setsockopt+0x150/0x150 [ 27.959424] [] compat_tcp_setsockopt+0x3d/0x70 [ 27.965624] [] compat_sock_common_setsockopt+0xb2/0x140 [ 27.972610] [] ? tcp_setsockopt+0xd0/0xd0 [ 27.978373] [] compat_SyS_setsockopt+0x149/0x290 [ 27.984743] [] ? sock_common_setsockopt+0xd0/0xd0 [ 27.991197] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 27.997741] [] ? vmacache_update+0xfe/0x130 [ 28.003677] [] ? do_fast_syscall_32+0xd7/0x890 [ 28.009870] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 28.016410] [] do_fast_syscall_32+0x314/0x890 [ 28.022517] [] sysenter_flags_fixed+0xd/0x17 [ 28.028539] [ 28.030129] The buggy address belongs to the page: [ 28.035020] page:ffffea0007435bc0 count:0 mapcount:0 mapping: (null) index:0x0 [ 28.043121] flags: 0x8000000000000000() [ 28.047163] page dumped because: kasan: bad access detected [ 28.052832] [ 28.054420] Memory state around the buggy address: [ 28.059312] ffff8801d0d6f980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.066634] ffff8801d0d6fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.073955] >ffff8801d0d6fa80: 00 f1 f1 f1 f1 00 00 00 00 04 f2 f2 f2 00 00 00 [ 28.081275] ^ [ 28.086956] ffff8801d0d6fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.094276] ffff8801d0d6fb80: 00 00 f1 f1 f1 f1 00 00 00 00 00 f2 f2 f2 00 00 [ 28.101594] ================================================================== [ 28.108915] Disabling lock debugging due to kernel taint [ 28.116141] Kernel panic - not syncing: panic_on_warn set ... [ 28.116141] [ 28.123480] CPU: 0 PID: 3321 Comm: syzkaller117385 Tainted: G B 4.4.107-g610c835 #4 [ 28.132361] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.141678] 0000000000000000 03c9e146d30cb769 ffff8801d0d6f900 ffffffff81d0457d [ 28.149621] ffffffff83fb2cde ffff8801d0d6f9d8 0000000000000000 ffff8801d0d6facc [ 28.157556] ffff8801d0d6fbb0 ffff8801d0d6f9c8 ffffffff8141774a 0000000041b58ab3 [ 28.165495] Call Trace: [ 28.168050] [] dump_stack+0xc1/0x124 [ 28.173380] [] panic+0x1aa/0x388 [ 28.178359] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 28.185248] [] ? preempt_schedule_common+0x42/0x70 [ 28.191789] [] ? preempt_schedule+0x24/0x30 [ 28.197722] [] ? ___preempt_schedule+0x12/0x14 [ 28.203914] [] kasan_end_report+0x50/0x50 [ 28.209673] [] kasan_report+0x15c/0x370 [ 28.215258] [] ? strlcpy+0x101/0x120 [ 28.220584] [] __asan_report_load1_noabort+0x14/0x20 [ 28.227295] [] strlcpy+0x101/0x120 [ 28.232449] [] xt_copy_counters_from_user+0x152/0x2c0 [ 28.239249] [] ? xt_compat_target_to_user+0x3a0/0x3a0 [ 28.246051] [] ? mark_held_locks+0xaf/0x100 [ 28.251987] [] ? mutex_lock_nested+0x5d4/0x850 [ 28.258180] [] do_add_counters+0x96/0x590 [ 28.263945] [] ? __do_replace+0x6d0/0x6d0 [ 28.269703] [] ? security_capable+0x8e/0xc0 [ 28.275638] [] ? ns_capable_common+0xcf/0x160 [ 28.281745] [] compat_do_ipt_set_ctl+0xbf/0x150 [ 28.288025] [] compat_nf_setsockopt+0x88/0x130 [ 28.294217] [] ? compat_do_replace.isra.15+0x410/0x410 [ 28.301105] [] compat_ip_setsockopt+0x9d/0xf0 [ 28.307389] [] compat_udp_setsockopt+0x45/0x80 [ 28.313581] [] ? udp_lib_setsockopt+0x560/0x560 [ 28.319862] [] compat_ipv6_setsockopt+0xb2/0x1e0 [ 28.326227] [] inet_csk_compat_setsockopt+0x95/0x120 [ 28.332941] [] ? ipv6_setsockopt+0x150/0x150 [ 28.338969] [] compat_tcp_setsockopt+0x3d/0x70 [ 28.345163] [] compat_sock_common_setsockopt+0xb2/0x140 [ 28.352137] [] ? tcp_setsockopt+0xd0/0xd0 [ 28.357899] [] compat_SyS_setsockopt+0x149/0x290 [ 28.364265] [] ? sock_common_setsockopt+0xd0/0xd0 [ 28.370720] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 28.377260] [] ? vmacache_update+0xfe/0x130 [ 28.383194] [] ? do_fast_syscall_32+0xd7/0x890 [ 28.389389] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 28.395931] [] do_fast_syscall_32+0x314/0x890 [ 28.402042] [] sysenter_flags_fixed+0xd/0x17 [ 28.408095] Dumping ftrace buffer: [ 28.411596] (ftrace buffer empty) [ 28.415270] Kernel Offset: disabled [ 28.418861] Rebooting in 86400 seconds..