[ 14.103455] 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: [ 18.713744] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 19.094362] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 19.850907] random: sshd: uninitialized urandom read (32 bytes read, 90 bits of entropy available) [ 20.014220] random: sshd: uninitialized urandom read (32 bytes read, 94 bits of entropy available) Warning: Permanently added 'ci-android-44-kasan-gce-386-1,10.128.0.15' (ECDSA) to the list of known hosts. [ 25.569764] random: sshd: uninitialized urandom read (32 bytes read, 102 bits of entropy available) executing program [ 25.663609] ================================================================== [ 25.670980] BUG: KASAN: stack-out-of-bounds in strlcpy+0x101/0x120 [ 25.677275] Read of size 1 at addr ffff8800b422fb3c by task syzkaller501248/3313 [ 25.684780] [ 25.686379] CPU: 1 PID: 3313 Comm: syzkaller501248 Not tainted 4.4.106-g1700518 #1 [ 25.694049] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.703374] 0000000000000000 6297c1acbfd2a967 ffff8800b422fa18 ffffffff81d02f7d [ 25.711320] ffffea0002d08bc0 ffff8800b422fb3c 0000000000000000 ffff8800b422fb3c [ 25.719270] ffff8800b422fc20 ffff8800b422fa50 ffffffff814fa843 ffff8800b422fb3c [ 25.727213] Call Trace: [ 25.729767] [] dump_stack+0xc1/0x124 [ 25.735098] [] print_address_description+0x73/0x260 [ 25.741729] [] kasan_report+0x285/0x370 [ 25.747315] [] ? strlcpy+0x101/0x120 [ 25.752654] [] __asan_report_load1_noabort+0x14/0x20 [ 25.759368] [] strlcpy+0x101/0x120 [ 25.764523] [] xt_copy_counters_from_user+0x152/0x2c0 [ 25.771336] [] ? xt_compat_target_to_user+0x3a0/0x3a0 [ 25.778150] [] ? mark_held_locks+0xaf/0x100 [ 25.784087] [] ? mutex_lock_nested+0x5d4/0x850 [ 25.790284] [] do_add_counters+0x96/0x590 [ 25.796045] [] ? __do_replace+0x6d0/0x6d0 [ 25.801807] [] ? security_capable+0x8e/0xc0 [ 25.807751] [] ? ns_capable_common+0xcf/0x160 [ 25.813864] [] compat_do_ip6t_set_ctl+0xbf/0x150 [ 25.820234] [] compat_nf_setsockopt+0x88/0x130 [ 25.826445] [] ? compat_do_replace.isra.14+0x420/0x420 [ 25.833352] [] compat_ipv6_setsockopt+0x13a/0x1e0 [ 25.839826] [] inet_csk_compat_setsockopt+0x95/0x120 [ 25.846553] [] ? ipv6_setsockopt+0x150/0x150 [ 25.852586] [] compat_tcp_setsockopt+0x3d/0x70 [ 25.858795] [] compat_sock_common_setsockopt+0xb2/0x140 [ 25.865770] [] ? tcp_setsockopt+0xd0/0xd0 [ 25.871542] [] compat_SyS_setsockopt+0x149/0x290 [ 25.877910] [] ? sock_common_setsockopt+0xd0/0xd0 [ 25.884365] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 25.890911] [] ? vmacache_update+0xfe/0x130 [ 25.896852] [] ? do_fast_syscall_32+0xd7/0x890 [ 25.903058] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 25.909611] [] do_fast_syscall_32+0x314/0x890 [ 25.915722] [] sysenter_flags_fixed+0xd/0x17 [ 25.921745] [ 25.923336] The buggy address belongs to the page: [ 25.928231] page:ffffea0002d08bc0 count:0 mapcount:0 mapping: (null) index:0x0 [ 25.936336] flags: 0x4000000000000000() [ 25.940387] page dumped because: kasan: bad access detected [ 25.946057] [ 25.947646] Memory state around the buggy address: [ 25.952538] ffff8800b422fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.959860] ffff8800b422fa80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 [ 25.967180] >ffff8800b422fb00: f1 f1 f1 00 00 00 00 04 f2 f2 f2 00 00 00 00 00 [ 25.974500] ^ [ 25.979650] ffff8800b422fb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.986972] ffff8800b422fc00: f1 f1 f1 f1 00 00 00 00 00 f2 f2 f2 00 00 00 00 [ 25.994293] ================================================================== [ 26.001614] Disabling lock debugging due to kernel taint [ 26.007398] Kernel panic - not syncing: panic_on_warn set ... [ 26.007398] [ 26.014730] CPU: 1 PID: 3313 Comm: syzkaller501248 Tainted: G B 4.4.106-g1700518 #1 [ 26.023617] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.032951] 0000000000000000 6297c1acbfd2a967 ffff8800b422f970 ffffffff81d02f7d [ 26.040893] ffffffff83fb1aa6 ffff8800b422fa48 0000000000000000 ffff8800b422fb3c [ 26.048836] ffff8800b422fc20 ffff8800b422fa38 ffffffff8141654a 0000000041b58ab3 [ 26.056772] Call Trace: [ 26.059328] [] dump_stack+0xc1/0x124 [ 26.064655] [] panic+0x1aa/0x388 [ 26.069637] [] ? percpu_up_read.constprop.46+0xe1/0xe1 [ 26.076527] [] ? preempt_schedule_common+0x42/0x70 [ 26.083069] [] ? preempt_schedule+0x24/0x30 [ 26.089005] [] ? ___preempt_schedule+0x12/0x14 [ 26.095204] [] kasan_end_report+0x50/0x50 [ 26.100966] [] kasan_report+0x15c/0x370 [ 26.106554] [] ? strlcpy+0x101/0x120 [ 26.111882] [] __asan_report_load1_noabort+0x14/0x20 [ 26.118597] [] strlcpy+0x101/0x120 [ 26.123751] [] xt_copy_counters_from_user+0x152/0x2c0 [ 26.130554] [] ? xt_compat_target_to_user+0x3a0/0x3a0 [ 26.137358] [] ? mark_held_locks+0xaf/0x100 [ 26.143292] [] ? mutex_lock_nested+0x5d4/0x850 [ 26.149491] [] do_add_counters+0x96/0x590 [ 26.155253] [] ? __do_replace+0x6d0/0x6d0 [ 26.161014] [] ? security_capable+0x8e/0xc0 [ 26.166960] [] ? ns_capable_common+0xcf/0x160 [ 26.173072] [] compat_do_ip6t_set_ctl+0xbf/0x150 [ 26.179441] [] compat_nf_setsockopt+0x88/0x130 [ 26.185635] [] ? compat_do_replace.isra.14+0x420/0x420 [ 26.192530] [] compat_ipv6_setsockopt+0x13a/0x1e0 [ 26.198991] [] inet_csk_compat_setsockopt+0x95/0x120 [ 26.205708] [] ? ipv6_setsockopt+0x150/0x150 [ 26.211732] [] compat_tcp_setsockopt+0x3d/0x70 [ 26.217929] [] compat_sock_common_setsockopt+0xb2/0x140 [ 26.224907] [] ? tcp_setsockopt+0xd0/0xd0 [ 26.230670] [] compat_SyS_setsockopt+0x149/0x290 [ 26.237039] [] ? sock_common_setsockopt+0xd0/0xd0 [ 26.243494] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 26.250045] [] ? vmacache_update+0xfe/0x130 [ 26.255979] [] ? do_fast_syscall_32+0xd7/0x890 [ 26.262174] [] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 26.268715] [] do_fast_syscall_32+0x314/0x890 [ 26.274826] [] sysenter_flags_fixed+0xd/0x17 [ 26.280883] Dumping ftrace buffer: [ 26.284387] (ftrace buffer empty) [ 26.288062] Kernel Offset: disabled [ 26.291654] Rebooting in 86400 seconds..