[ 30.758816] random: sshd: uninitialized urandom read (32 bytes read) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 31.417170] random: sshd: uninitialized urandom read (32 bytes read) [ 31.923897] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.589875] random: sshd: uninitialized urandom read (32 bytes read) [ 32.773895] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.88' (ECDSA) to the list of known hosts. [ 38.374693] random: sshd: uninitialized urandom read (32 bytes read) [ 38.490170] kauditd_printk_skb: 10 callbacks suppressed [ 38.490185] audit: type=1400 audit(1578427064.772:36): avc: denied { map } for pid=7095 comm="syz-executor294" path="/root/syz-executor294333424" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 38.740868] IPVS: ftp: loaded support on port[0] = 21 [ 39.528640] chnl_net:caif_netlink_parms(): no params data found [ 39.561793] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.568686] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.575906] device bridge_slave_0 entered promiscuous mode [ 39.582915] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.589385] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.596460] device bridge_slave_1 entered promiscuous mode [ 39.610294] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 39.618888] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 39.635690] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 39.642986] team0: Port device team_slave_0 added [ 39.648469] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 39.655633] team0: Port device team_slave_1 added [ 39.661037] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 39.668416] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 39.732056] device hsr_slave_0 entered promiscuous mode [ 39.770427] device hsr_slave_1 entered promiscuous mode [ 39.810835] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 39.817967] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 39.856260] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.862695] bridge0: port 2(bridge_slave_1) entered forwarding state [ 39.869499] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.876012] bridge0: port 1(bridge_slave_0) entered forwarding state [ 39.904668] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 39.911675] 8021q: adding VLAN 0 to HW filter on device bond0 [ 39.919432] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 39.927792] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 39.946244] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.953332] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.963285] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 39.969360] 8021q: adding VLAN 0 to HW filter on device team0 [ 39.979042] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 39.986952] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.993333] bridge0: port 1(bridge_slave_0) entered forwarding state [ 40.003846] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 40.011428] bridge0: port 2(bridge_slave_1) entered blocking state [ 40.017765] bridge0: port 2(bridge_slave_1) entered forwarding state [ 40.031194] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 40.039170] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 40.047727] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 40.060476] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 40.067939] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 40.076610] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 40.083250] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 40.095326] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 40.102609] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 40.109344] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 40.121017] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 40.176672] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 40.186305] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 40.218074] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 40.225405] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 40.232384] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 40.242085] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 40.249475] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 40.256461] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready executing program [ 40.265801] device veth0_vlan entered promiscuous mode [ 40.274388] device veth1_vlan entered promiscuous mode [ 40.280199] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 40.288423] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 40.320522] ================================================================== [ 40.328002] BUG: KASAN: slab-out-of-bounds in macvlan_broadcast+0x4b9/0x5c0 [ 40.335121] Read of size 4 at addr ffff88808c3d82c1 by task syz-executor294/7096 [ 40.342669] [ 40.344286] CPU: 0 PID: 7096 Comm: syz-executor294 Not tainted 4.14.162-syzkaller #0 [ 40.352154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.361492] Call Trace: [ 40.364073] dump_stack+0x142/0x197 [ 40.367687] ? macvlan_broadcast+0x4b9/0x5c0 [ 40.372082] print_address_description.cold+0x7c/0x1dc [ 40.377353] ? macvlan_broadcast+0x4b9/0x5c0 [ 40.381747] kasan_report.cold+0xa9/0x2af [ 40.386065] __asan_report_load_n_noabort+0xf/0x20 [ 40.391093] macvlan_broadcast+0x4b9/0x5c0 [ 40.395381] ? validate_xmit_skb+0x650/0x9d0 [ 40.399809] macvlan_start_xmit+0x56b/0x72d [ 40.404159] packet_direct_xmit+0x431/0x640 [ 40.408479] packet_sendmsg+0x1dd4/0x5a60 [ 40.412631] ? avc_has_perm_noaudit+0x420/0x420 [ 40.417289] ? trace_hardirqs_on+0x10/0x10 [ 40.421524] ? packet_notifier+0x760/0x760 [ 40.425801] ? release_sock+0x14a/0x1b0 [ 40.429898] ? security_socket_sendmsg+0x89/0xb0 [ 40.434647] ? packet_notifier+0x760/0x760 [ 40.438867] sock_sendmsg+0xce/0x110 [ 40.442668] SYSC_sendto+0x206/0x310 [ 40.446372] ? SYSC_connect+0x2d0/0x2d0 [ 40.450371] ? move_addr_to_kernel.part.0+0x100/0x100 [ 40.455558] ? ioctl_preallocate+0x1c0/0x1c0 [ 40.459958] ? security_file_ioctl+0x7d/0xb0 [ 40.464353] ? security_file_ioctl+0x89/0xb0 [ 40.468758] SyS_sendto+0x40/0x50 [ 40.472193] ? SyS_getpeername+0x30/0x30 [ 40.476246] do_syscall_64+0x1e8/0x640 [ 40.480115] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.484960] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 40.490142] RIP: 0033:0x4423d9 [ 40.493319] RSP: 002b:00007ffe3f99ef68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 40.501011] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004423d9 [ 40.508268] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 [ 40.516110] RBP: 00007ffe3f99ef90 R08: 0000000000000000 R09: 0000000000000000 [ 40.520329] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 40.523374] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 40.523382] R13: 0000000000403910 R14: 0000000000000000 R15: 0000000000000000 [ 40.532273] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 40.537146] [ 40.545170] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 40.551233] Allocated by task 3979: [ 40.551247] save_stack_trace+0x16/0x20 [ 40.551254] save_stack+0x45/0xd0 [ 40.551259] kasan_kmalloc+0xce/0xf0 [ 40.551265] kasan_slab_alloc+0xf/0x20 [ 40.551270] kmem_cache_alloc+0x12e/0x780 [ 40.551276] getname_flags+0xcb/0x580 [ 40.551281] getname+0x1a/0x20 [ 40.551287] SyS_execve+0x1f/0x50 [ 40.551294] do_syscall_64+0x1e8/0x640 [ 40.551302] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 40.551304] [ 40.551307] Freed by task 3979: [ 40.551313] save_stack_trace+0x16/0x20 [ 40.551318] save_stack+0x45/0xd0 [ 40.551324] kasan_slab_free+0x75/0xc0 [ 40.551329] kmem_cache_free+0x83/0x2b0 [ 40.551334] putname+0xdb/0x120 [ 40.551340] do_execveat_common.isra.0+0x129b/0x1dd0 [ 40.551345] SyS_execve+0x39/0x50 [ 40.551350] do_syscall_64+0x1e8/0x640 [ 40.551356] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 40.551359] [ 40.551365] The buggy address belongs to the object at ffff88808c3d8e00 [ 40.551365] which belongs to the cache names_cache of size 4096 [ 40.551371] The buggy address is located 2879 bytes to the left of [ 40.551371] 4096-byte region [ffff88808c3d8e00, ffff88808c3d9e00) [ 40.551373] The buggy address belongs to the page: [ 40.551379] page:ffffea000230f600 count:1 mapcount:0 mapping:ffff88808c3d8e00 index:0x0 compound_mapcount: 0 [ 40.551390] flags: 0xfffe0000008100(slab|head) [ 40.551400] raw: 00fffe0000008100 ffff88808c3d8e00 0000000000000000 0000000100000001 [ 40.551407] raw: ffffea000230a320 ffffea00023c0220 ffff8880aa9e9cc0 0000000000000000 [ 40.551410] page dumped because: kasan: bad access detected [ 40.551412] [ 40.551414] Memory state around the buggy address: [ 40.551420] ffff88808c3d8180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.551425] ffff88808c3d8200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.551431] >ffff88808c3d8280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.551434] ^ [ 40.551439] ffff88808c3d8300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.551444] ffff88808c3d8380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.551447] ================================================================== [ 40.551450] Disabling lock debugging due to kernel taint [ 40.551475] Kernel panic - not syncing: panic_on_warn set ... [ 40.551475] [ 40.551483] CPU: 0 PID: 7096 Comm: syz-executor294 Tainted: G B 4.14.162-syzkaller #0 [ 40.551486] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.551488] Call Trace: [ 40.551497] dump_stack+0x142/0x197 [ 40.551507] ? macvlan_broadcast+0x4b9/0x5c0 [ 40.551513] panic+0x1f9/0x42d [ 40.551519] ? add_taint.cold+0x16/0x16 [ 40.551530] kasan_end_report+0x47/0x4f [ 40.551536] kasan_report.cold+0x130/0x2af [ 40.551545] __asan_report_load_n_noabort+0xf/0x20 [ 40.551552] macvlan_broadcast+0x4b9/0x5c0 [ 40.551560] ? validate_xmit_skb+0x650/0x9d0 [ 40.551569] macvlan_start_xmit+0x56b/0x72d [ 40.551580] packet_direct_xmit+0x431/0x640 [ 40.551588] packet_sendmsg+0x1dd4/0x5a60 [ 40.551596] ? avc_has_perm_noaudit+0x420/0x420 [ 40.551606] ? trace_hardirqs_on+0x10/0x10 [ 40.551619] ? packet_notifier+0x760/0x760 [ 40.551626] ? release_sock+0x14a/0x1b0 [ 40.551638] ? security_socket_sendmsg+0x89/0xb0 [ 40.551642] ? packet_notifier+0x760/0x760 [ 40.551649] sock_sendmsg+0xce/0x110 [ 40.551656] SYSC_sendto+0x206/0x310 [ 40.551662] ? SYSC_connect+0x2d0/0x2d0 [ 40.551674] ? move_addr_to_kernel.part.0+0x100/0x100 [ 40.551681] ? ioctl_preallocate+0x1c0/0x1c0 [ 40.551693] ? security_file_ioctl+0x7d/0xb0 [ 40.551699] ? security_file_ioctl+0x89/0xb0 [ 40.551707] SyS_sendto+0x40/0x50 [ 40.551713] ? SyS_getpeername+0x30/0x30 [ 40.551721] do_syscall_64+0x1e8/0x640 [ 40.551728] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.551737] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 40.551743] RIP: 0033:0x4423d9 [ 40.551747] RSP: 002b:00007ffe3f99ef68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 40.551755] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004423d9 [ 40.551759] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 [ 40.551763] RBP: 00007ffe3f99ef90 R08: 0000000000000000 R09: 0000000000000000 [ 40.551767] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 40.551771] R13: 0000000000403910 R14: 0000000000000000 R15: 0000000000000000 [ 40.553303] Kernel Offset: disabled [ 40.982264] Rebooting in 86400 seconds..