[ 33.589126] audit: type=1800 audit(1585210365.519:33): pid=7182 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 33.616778] audit: type=1800 audit(1585210365.519:34): pid=7182 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 35.996283] random: sshd: uninitialized urandom read (32 bytes read) [ 36.215588] audit: type=1400 audit(1585210368.149:35): avc: denied { map } for pid=7357 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 [ 36.267765] random: sshd: uninitialized urandom read (32 bytes read) [ 36.974911] random: sshd: uninitialized urandom read (32 bytes read) [ 37.162544] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.1.42' (ECDSA) to the list of known hosts. [ 42.648878] random: sshd: uninitialized urandom read (32 bytes read) [ 42.853903] audit: type=1400 audit(1585210374.789:36): avc: denied { map } for pid=7369 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2020/03/26 08:12:54 parsed 1 programs [ 43.457587] random: cc1: uninitialized urandom read (8 bytes read) 2020/03/26 08:12:56 executed programs: 0 [ 44.373502] audit: type=1400 audit(1585210376.309:37): avc: denied { map } for pid=7369 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=1131 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 [ 44.681123] IPVS: ftp: loaded support on port[0] = 21 [ 45.558418] chnl_net:caif_netlink_parms(): no params data found [ 45.606482] bridge0: port 1(bridge_slave_0) entered blocking state [ 45.613584] bridge0: port 1(bridge_slave_0) entered disabled state [ 45.621809] device bridge_slave_0 entered promiscuous mode [ 45.629068] bridge0: port 2(bridge_slave_1) entered blocking state [ 45.635786] bridge0: port 2(bridge_slave_1) entered disabled state [ 45.642778] device bridge_slave_1 entered promiscuous mode [ 45.658091] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 45.667601] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 45.684188] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 45.691553] team0: Port device team_slave_0 added [ 45.698018] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 45.705334] team0: Port device team_slave_1 added [ 45.718835] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 45.725206] 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. [ 45.750639] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 45.762266] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 45.768520] 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. [ 45.794226] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 45.804894] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 45.812520] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 45.872487] device hsr_slave_0 entered promiscuous mode [ 45.940445] device hsr_slave_1 entered promiscuous mode [ 45.980835] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 45.988055] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 46.039020] audit: type=1400 audit(1585210377.969:38): avc: denied { create } for pid=7386 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 [ 46.058797] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.064641] audit: type=1400 audit(1585210377.969:39): avc: denied { write } for pid=7386 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 [ 46.069746] bridge0: port 2(bridge_slave_1) entered forwarding state [ 46.095064] audit: type=1400 audit(1585210377.979:40): avc: denied { read } for pid=7386 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 [ 46.101150] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.131937] bridge0: port 1(bridge_slave_0) entered forwarding state [ 46.166016] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 46.172886] 8021q: adding VLAN 0 to HW filter on device bond0 [ 46.181697] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 46.189992] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 46.199126] bridge0: port 1(bridge_slave_0) entered disabled state [ 46.206449] bridge0: port 2(bridge_slave_1) entered disabled state [ 46.216313] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 46.222770] 8021q: adding VLAN 0 to HW filter on device team0 [ 46.231503] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 46.239122] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.245731] bridge0: port 1(bridge_slave_0) entered forwarding state [ 46.254889] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 46.263396] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.269746] bridge0: port 2(bridge_slave_1) entered forwarding state [ 46.291276] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 46.299804] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 46.307897] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 46.316146] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 46.324962] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 46.331307] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 46.338577] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 46.352169] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 46.359815] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 46.367432] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 46.378559] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 46.441533] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 46.452240] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 46.490430] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 46.497574] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 46.505221] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 46.514638] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 46.522248] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 46.529297] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 46.538258] device veth0_vlan entered promiscuous mode [ 46.547536] device veth1_vlan entered promiscuous mode [ 46.554292] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 46.561018] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 46.568108] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 46.583634] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 46.592850] IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready [ 46.599692] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 46.608195] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 46.617763] device veth0_macvtap entered promiscuous mode [ 46.624395] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 46.633797] device veth1_macvtap entered promiscuous mode [ 46.639874] IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready [ 46.648474] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 46.658189] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 46.667384] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready [ 46.674848] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 46.682192] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 46.689402] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 46.697261] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 46.705354] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 46.716672] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready [ 46.723739] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 46.730354] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 46.738627] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 48.097728] ------------[ cut here ]------------ [ 48.102832] kernel BUG at drivers/dma-buf/dma-buf.c:68! [ 48.108615] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 48.114057] Modules linked in: [ 48.117374] CPU: 0 PID: 7445 Comm: syz-executor.0 Not tainted 4.14.174-syzkaller #0 [ 48.125149] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.134611] task: ffff888098eaa440 task.stack: ffff88808cbd8000 [ 48.140672] RIP: 0010:dma_buf_release+0x313/0x5c0 [ 48.145500] RSP: 0018:ffff88808cbdfdc0 EFLAGS: 00010297 [ 48.150851] RAX: ffff888098eaa440 RBX: ffff88808f763ac0 RCX: 1ffffffff14cb66c [ 48.158236] RDX: 0000000000000000 RSI: ffff88808f763ac0 RDI: ffff888090f605f8 [ 48.167558] RBP: ffff888090f60480 R08: 0000000000000000 R09: 0000000000000000 [ 48.174969] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88808f763ae8 [ 48.182405] R13: ffff88808f763b3c R14: ffffffff83a4f7b0 R15: ffff88808f763ad0 [ 48.189767] FS: 000000000103a940(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 48.198003] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.203903] CR2: 000000000076c000 CR3: 0000000094d41000 CR4: 00000000001406f0 [ 48.211248] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.218604] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.225889] Call Trace: [ 48.228471] ? ima_file_free+0x4f/0x330 [ 48.232466] ? dma_buf_debug_show+0xee0/0xee0 [ 48.237003] __fput+0x25f/0x790 [ 48.240282] task_work_run+0x113/0x190 [ 48.244187] exit_to_usermode_loop+0x1d6/0x220 [ 48.248801] do_syscall_64+0x4a3/0x640 [ 48.252826] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 48.258063] RIP: 0033:0x4163e1 [ 48.261243] RSP: 002b:00007ffe0ffa7ff0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 48.269084] RAX: 0000000000000000 RBX: 0000000000000008 RCX: 00000000004163e1 [ 48.276446] RDX: 0000000000000000 RSI: 0000000000000081 RDI: 0000000000000007 [ 48.283816] RBP: 0000000000000000 R08: 0000000000000000 R09: 01ffffffffffffff [ 48.291131] R10: 00000000007708c0 R11: 0000000000000293 R12: 000000000076bf00 [ 48.298428] R13: 00000000007708d0 R14: 0000000000000000 R15: 000000000076bf0c [ 48.305683] Code: 31 e4 e8 81 eb ac fd 48 89 ef e8 49 77 de fd e8 d4 4c b5 fd 44 89 e0 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 bd 4c b5 fd <0f> 0b e8 b6 4c b5 fd e8 21 f8 a5 fd 48 8d bd 38 02 00 00 48 b8 [ 48.324763] RIP: dma_buf_release+0x313/0x5c0 RSP: ffff88808cbdfdc0 [ 48.333087] ---[ end trace c14ec1e516fdee60 ]--- [ 48.337863] Kernel panic - not syncing: Fatal exception [ 48.344679] Kernel Offset: disabled [ 48.348306] Rebooting in 86400 seconds..