[ 16.077868] random: sshd: uninitialized urandom read (32 bytes read, 32 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: [ 21.033419] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 21.308649] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.091998] random: sshd: uninitialized urandom read (32 bytes read, 93 bits of entropy available) [ 22.264226] random: sshd: uninitialized urandom read (32 bytes read, 98 bits of entropy available) Warning: Permanently added 'ci-android-44-kasan-gce-386-4,10.128.0.73' (ECDSA) to the list of known hosts. [ 27.650765] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available) executing program [ 27.747757] ================================================================== [ 27.755142] BUG: KASAN: stack-out-of-bounds in strlcpy+0x101/0x120 [ 27.761426] Read of size 1 at addr ffff8801d1037b3c by task syzkaller259959/3320 [ 27.768921] [ 27.770515] CPU: 1 PID: 3320 Comm: syzkaller259959 Not tainted 4.4.107-g610c835 #4 [ 27.778183] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.787500] 0000000000000000 4c19fb1a8a8232b5 ffff8801d1037a18 ffffffff81d0457d [ 27.795470] ffffea0007440dc0 ffff8801d1037b3c 0000000000000000 ffff8801d1037b3c [ 27.803424] ffff8801d1037c20 ffff8801d1037a50 ffffffff814fbb23 ffff8801d1037b3c [ 27.811379] Call Trace: [ 27.813936] [] dump_stack+0xc1/0x124 [ 27.819265] [] print_address_description+0x73/0x260 [ 27.825896] [] kasan_report+0x285/0x370 [ 27.831720] [] ? strlcpy+0x101/0x120 [ 27.837051] [] __asan_report_load1_noabort+0x14/0x20 [ 27.843766] [] strlcpy+0x101/0x120 [ 27.848923] [] xt_copy_counters_from_user+0x152/0x2c0 [ 27.855726] [] ? xt_compat_target_to_user+0x3a0/0x3a0 [ 27.862531] [] ? mark_held_locks+0xaf/0x100 [ 27.868469] [] ? mutex_lock_nested+0x5d4/0x850 [ 27.874666] [] do_add_counters+0x96/0x590 [ 27.880435] [] ? __do_replace+0x6d0/0x6d0 [ 27.886197] [] ? security_capable+0x8e/0xc0 [ 27.892133] [] ? ns_capable_common+0xcf/0x160 [ 27.898242] [] compat_do_ip6t_set_ctl+0xbf/0x150 [ 27.904612] [] compat_nf_setsockopt+0x88/0x130 [ 27.910807] [] ? compat_do_replace.isra.14+0x420/0x420 [ 27.917700] [] compat_ipv6_setsockopt+0x13a/0x1e0 [ 27.924158] [] inet_csk_compat_setsockopt+0x95/0x120 [ 27.930875] [] ? ipv6_setsockopt+0x150/0x150 [ 27.936899] [] compat_tcp_setsockopt+0x3d/0x70 [ 27.943107] [] compat_sock_common_setsockopt+0xb2/0x140 [ 27.950085] [] ? tcp_setsockopt+0xd0/0xd0 [ 27.955849] [] compat_SyS_setsockopt+0x149/0x290 [ 27.962218] [] ? sock_common_setsockopt+0xd0/0xd0 [ 27.968673] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 27.975217] [] ? vmacache_update+0xfe/0x130 [ 27.981155] [] ? do_fast_syscall_32+0xd7/0x890 [ 27.987354] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 27.993904] [] do_fast_syscall_32+0x314/0x890 [ 28.000013] [] sysenter_flags_fixed+0xd/0x17 [ 28.006036] [ 28.007628] The buggy address belongs to the page: [ 28.012521] page:ffffea0007440dc0 count:0 mapcount:0 mapping: (null) index:0x0 [ 28.020623] flags: 0x8000000000000000() [ 28.024673] page dumped because: kasan: bad access detected [ 28.030351] [ 28.031943] Memory state around the buggy address: [ 28.036854] ffff8801d1037a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.044184] ffff8801d1037a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 [ 28.051505] >ffff8801d1037b00: f1 f1 f1 00 00 00 00 04 f2 f2 f2 00 00 00 00 00 [ 28.058826] ^ [ 28.063977] ffff8801d1037b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.071299] ffff8801d1037c00: f1 f1 f1 f1 00 00 00 00 00 f2 f2 f2 00 00 00 00 [ 28.078621] ================================================================== [ 28.085942] Disabling lock debugging due to kernel taint [ 28.091571] Kernel panic - not syncing: panic_on_warn set ... [ 28.091571] [ 28.098916] CPU: 1 PID: 3320 Comm: syzkaller259959 Tainted: G B 4.4.107-g610c835 #4 [ 28.107809] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.117128] 0000000000000000 4c19fb1a8a8232b5 ffff8801d1037970 ffffffff81d0457d [ 28.125080] ffffffff83fb2cde ffff8801d1037a48 0000000000000000 ffff8801d1037b3c [ 28.133030] ffff8801d1037c20 ffff8801d1037a38 ffffffff8141774a 0000000041b58ab3 [ 28.140988] Call Trace: [ 28.143543] [] dump_stack+0xc1/0x124 [ 28.148870] [] panic+0x1aa/0x388 [ 28.153854] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 28.160746] [] ? preempt_schedule_common+0x42/0x70 [ 28.167286] [] ? preempt_schedule+0x24/0x30 [ 28.173221] [] ? ___preempt_schedule+0x12/0x14 [ 28.179416] [] kasan_end_report+0x50/0x50 [ 28.185175] [] kasan_report+0x15c/0x370 [ 28.190764] [] ? strlcpy+0x101/0x120 [ 28.196090] [] __asan_report_load1_noabort+0x14/0x20 [ 28.202809] [] strlcpy+0x101/0x120 [ 28.207965] [] xt_copy_counters_from_user+0x152/0x2c0 [ 28.214769] [] ? xt_compat_target_to_user+0x3a0/0x3a0 [ 28.221573] [] ? mark_held_locks+0xaf/0x100 [ 28.227509] [] ? mutex_lock_nested+0x5d4/0x850 [ 28.233707] [] do_add_counters+0x96/0x590 [ 28.239469] [] ? __do_replace+0x6d0/0x6d0 [ 28.245233] [] ? security_capable+0x8e/0xc0 [ 28.251174] [] ? ns_capable_common+0xcf/0x160 [ 28.257282] [] compat_do_ip6t_set_ctl+0xbf/0x150 [ 28.263653] [] compat_nf_setsockopt+0x88/0x130 [ 28.269868] [] ? compat_do_replace.isra.14+0x420/0x420 [ 28.276771] [] compat_ipv6_setsockopt+0x13a/0x1e0 [ 28.283229] [] inet_csk_compat_setsockopt+0x95/0x120 [ 28.289946] [] ? ipv6_setsockopt+0x150/0x150 [ 28.295968] [] compat_tcp_setsockopt+0x3d/0x70 [ 28.302172] [] compat_sock_common_setsockopt+0xb2/0x140 [ 28.309150] [] ? tcp_setsockopt+0xd0/0xd0 [ 28.314912] [] compat_SyS_setsockopt+0x149/0x290 [ 28.321281] [] ? sock_common_setsockopt+0xd0/0xd0 [ 28.327736] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 28.334281] [] ? vmacache_update+0xfe/0x130 [ 28.340218] [] ? do_fast_syscall_32+0xd7/0x890 [ 28.346412] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 28.352965] [] do_fast_syscall_32+0x314/0x890 [ 28.359081] [] sysenter_flags_fixed+0xd/0x17 [ 28.365143] Dumping ftrace buffer: [ 28.368664] (ftrace buffer empty) [ 28.372339] Kernel Offset: disabled [ 28.375932] Rebooting in 86400 seconds..