[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.187871] random: sshd: uninitialized urandom read (32 bytes read) [ 37.448986] kauditd_printk_skb: 11 callbacks suppressed [ 37.448995] audit: type=1400 audit(1585493709.112:35): avc: denied { map } for pid=7334 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 37.504796] random: sshd: uninitialized urandom read (32 bytes read) [ 38.213903] random: sshd: uninitialized urandom read (32 bytes read) [ 38.410900] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.53' (ECDSA) to the list of known hosts. [ 43.947216] random: sshd: uninitialized urandom read (32 bytes read) [ 44.151676] audit: type=1400 audit(1585493715.822:36): avc: denied { map } for pid=7346 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16480 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2020/03/29 14:55:15 parsed 1 programs [ 44.757605] random: cc1: uninitialized urandom read (8 bytes read) 2020/03/29 14:55:17 executed programs: 0 [ 45.416558] audit: type=1400 audit(1585493717.072:37): avc: denied { map } for pid=7346 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=15646 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 [ 45.751036] IPVS: ftp: loaded support on port[0] = 21 [ 46.577687] chnl_net:caif_netlink_parms(): no params data found [ 46.626336] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.633500] bridge0: port 1(bridge_slave_0) entered disabled state [ 46.641629] device bridge_slave_0 entered promiscuous mode [ 46.648597] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.655165] bridge0: port 2(bridge_slave_1) entered disabled state [ 46.662100] device bridge_slave_1 entered promiscuous mode [ 46.677984] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 46.686928] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 46.703278] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 46.710542] team0: Port device team_slave_0 added [ 46.716094] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 46.723527] team0: Port device team_slave_1 added [ 46.737125] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 46.743413] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 46.769103] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 46.780940] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 46.787179] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 46.812392] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 46.822980] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 46.830539] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 46.892313] device hsr_slave_0 entered promiscuous mode [ 46.930392] device hsr_slave_1 entered promiscuous mode [ 46.990790] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 46.997960] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 47.046390] audit: type=1400 audit(1585493718.712:38): avc: denied { create } for pid=7363 comm="syz-executor.0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 47.064904] bridge0: port 2(bridge_slave_1) entered blocking state [ 47.070606] audit: type=1400 audit(1585493718.712:39): avc: denied { write } for pid=7363 comm="syz-executor.0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 47.076710] bridge0: port 2(bridge_slave_1) entered forwarding state [ 47.100950] audit: type=1400 audit(1585493718.712:40): avc: denied { read } for pid=7363 comm="syz-executor.0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 47.107404] bridge0: port 1(bridge_slave_0) entered blocking state [ 47.137081] bridge0: port 1(bridge_slave_0) entered forwarding state [ 47.169472] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 47.176619] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.185192] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 47.194571] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 47.212993] bridge0: port 1(bridge_slave_0) entered disabled state [ 47.220293] bridge0: port 2(bridge_slave_1) entered disabled state [ 47.230189] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 47.236371] 8021q: adding VLAN 0 to HW filter on device team0 [ 47.244791] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 47.252424] bridge0: port 1(bridge_slave_0) entered blocking state [ 47.258756] bridge0: port 1(bridge_slave_0) entered forwarding state [ 47.280023] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 47.289975] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 47.301300] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 47.308170] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 47.316872] bridge0: port 2(bridge_slave_1) entered blocking state [ 47.323316] bridge0: port 2(bridge_slave_1) entered forwarding state [ 47.330887] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 47.338554] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 47.346209] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 47.353828] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 47.361511] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 47.368237] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 47.379643] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 47.388856] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 47.397063] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 47.408327] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 47.467863] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 47.478263] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 47.512594] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 47.519523] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 47.526254] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 47.535241] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 47.543350] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 47.550482] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 47.558855] device veth0_vlan entered promiscuous mode [ 47.567608] device veth1_vlan entered promiscuous mode [ 47.573862] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 47.581262] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 47.588255] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 47.603653] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 47.613003] IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready [ 47.619804] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 47.627859] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 47.637761] device veth0_macvtap entered promiscuous mode [ 47.644121] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 47.654354] device veth1_macvtap entered promiscuous mode [ 47.660958] IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready [ 47.669646] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 47.678746] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 47.688494] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready [ 47.696255] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 47.703311] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 47.710592] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 47.717686] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 47.725598] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 47.736623] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready [ 47.743618] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 47.750211] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 47.757906] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 49.074563] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=7415 comm=syz-executor.0 [ 49.087119] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=7415 comm=syz-executor.0 [ 49.099696] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=7415 comm=syz-executor.0 [ 49.112070] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=7415 comm=syz-executor.0 [ 49.125094] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=7415 comm=syz-executor.0 [ 49.137560] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=7415 comm=syz-executor.0 [ 49.149956] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=7415 comm=syz-executor.0 [ 49.162299] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=7415 comm=syz-executor.0 [ 49.174789] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=7415 comm=syz-executor.0 [ 49.187954] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=7415 comm=syz-executor.0 [ 49.323700] kasan: CONFIG_KASAN_INLINE enabled [ 49.328422] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 49.335924] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 49.342149] Modules linked in: [ 49.345329] CPU: 0 PID: 7434 Comm: syz-executor.0 Not tainted 4.14.174-syzkaller #0 [ 49.353227] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.362568] task: ffff88809ed80600 task.stack: ffff8880a1510000 [ 49.368616] RIP: 0010:__smc_diag_dump.isra.0+0x300/0x1550 [ 49.374150] RSP: 0018:ffff8880a1517480 EFLAGS: 00010203 [ 49.379493] RAX: dffffc0000000000 RBX: ffff8880a5620f00 RCX: 0000000000000000 [ 49.386741] RDX: 0000000000000001 RSI: ffff8880a5620f3c RDI: 000000000000000e [ 49.393991] RBP: ffff8880a48407c0 R08: 0000000000000040 R09: ffff8880a5620f10 [ 49.401247] R10: ffffed1014ac41e9 R11: ffff8880a5620f4f R12: 1ffff110142a2e94 [ 49.408504] R13: ffff8880a122d340 R14: ffff888072876dd0 R15: 0000000000000000 [ 49.415759] FS: 00007f3993264700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 49.424212] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.430080] CR2: 0000000000400200 CR3: 00000000a54c0000 CR4: 00000000001406f0 [ 49.437356] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.444721] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.451976] Call Trace: [ 49.454548] ? smc_diag_handler_dump+0x1e0/0x1e0 [ 49.459299] ? trace_hardirqs_on+0x10/0x10 [ 49.463516] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 49.468948] ? __kmalloc_node_track_caller+0x38/0x70 [ 49.474033] ? rcu_read_lock_sched_held+0x10a/0x130 [ 49.479027] ? kmem_cache_alloc_node_trace+0x38c/0x7b0 [ 49.484292] ? kasan_unpoison_shadow+0x30/0x40 [ 49.488854] ? kasan_kmalloc+0xbf/0xe0 [ 49.492729] ? lock_acquire+0x170/0x3f0 [ 49.497996] ? smc_diag_dump+0x8a/0x290 [ 49.501964] smc_diag_dump+0x1d9/0x290 [ 49.505834] netlink_dump+0x3da/0xab0 [ 49.509618] __netlink_dump_start+0x4e2/0x740 [ 49.514113] smc_diag_handler_dump+0x19d/0x1e0 [ 49.518689] ? smc_gid_be16_convert+0x2a0/0x2a0 [ 49.523350] ? __smc_diag_dump.isra.0+0x1550/0x1550 [ 49.528362] sock_diag_rcv_msg+0x28d/0x390 [ 49.532593] netlink_rcv_skb+0x127/0x370 [ 49.536635] ? sock_diag_bind+0x80/0x80 [ 49.540587] ? netlink_ack+0x980/0x980 [ 49.544456] ? lock_downgrade+0x6e0/0x6e0 [ 49.548587] sock_diag_rcv+0x26/0x40 [ 49.552289] netlink_unicast+0x437/0x620 [ 49.556384] ? netlink_attachskb+0x600/0x600 [ 49.560770] netlink_sendmsg+0x733/0xbe0 [ 49.564828] ? netlink_unicast+0x620/0x620 [ 49.569052] ? __lock_is_held+0xad/0x140 [ 49.573107] ? security_socket_sendmsg+0x83/0xb0 [ 49.577875] ? netlink_unicast+0x620/0x620 [ 49.582138] sock_sendmsg+0xc5/0x100 [ 49.585838] sock_no_sendpage+0xe5/0x110 [ 49.589889] ? sock_kzfree_s+0x50/0x50 [ 49.593765] ? sock_kzfree_s+0x50/0x50 [ 49.597640] kernel_sendpage+0x82/0xd0 [ 49.601514] sock_sendpage+0x84/0xa0 [ 49.605210] pipe_to_sendpage+0x226/0x2d0 [ 49.609338] ? kernel_sendpage+0xd0/0xd0 [ 49.613382] ? direct_splice_actor+0x160/0x160 [ 49.617947] ? splice_from_pipe_next.part.0+0x1e4/0x290 [ 49.623295] __splice_from_pipe+0x332/0x740 [ 49.627611] ? direct_splice_actor+0x160/0x160 [ 49.632191] ? direct_splice_actor+0x160/0x160 [ 49.636750] splice_from_pipe+0xc6/0x120 [ 49.640789] ? splice_shrink_spd+0xb0/0xb0 [ 49.645006] ? rw_verify_area+0xe1/0x2a0 [ 49.649046] ? splice_from_pipe+0x120/0x120 [ 49.653346] SyS_splice+0xca0/0x1230 [ 49.657039] ? compat_SyS_vmsplice+0x250/0x250 [ 49.661602] ? SyS_clock_settime+0x1a0/0x1a0 [ 49.665990] ? do_syscall_64+0x4c/0x640 [ 49.669943] ? compat_SyS_vmsplice+0x250/0x250 [ 49.674527] do_syscall_64+0x1d5/0x640 [ 49.678396] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 49.683605] RIP: 0033:0x45c849 [ 49.686772] RSP: 002b:00007f3993263c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 49.694456] RAX: ffffffffffffffda RBX: 00007f39932646d4 RCX: 000000000045c849 [ 49.701704] RDX: 000000000000000a RSI: 0000000000000000 RDI: 0000000000000008 [ 49.708952] RBP: 000000000076bf00 R08: 0000000080000001 R09: 0000000000000000 [ 49.716207] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 49.723550] R13: 0000000000000ba2 R14: 00000000004ce68a R15: 000000000076bf0c [ 49.730807] Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 11 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 7f 20 49 8d 7f 0e 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 [ 49.750063] RIP: __smc_diag_dump.isra.0+0x300/0x1550 RSP: ffff8880a1517480 [ 49.758954] ---[ end trace af8e7de634d9aaf4 ]--- [ 49.763738] Kernel panic - not syncing: Fatal exception [ 49.770431] Kernel Offset: disabled [ 49.774168] Rebooting in 86400 seconds..