[ 44.192767] audit: type=1400 audit(1579351195.683:37): avc: denied { create } for pid=7224 comm="syz-fuzzer" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_crypto_socket permissive=1 [ 44.216721] audit: type=1400 audit(1579351195.683:38): avc: denied { create } for pid=7224 comm="syz-fuzzer" 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 [ 44.240634] audit: type=1400 audit(1579351195.683:39): avc: denied { create } for pid=7224 comm="syz-fuzzer" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 Warning: Permanently added '10.128.0.197' (ECDSA) to the list of known hosts. 2020/01/18 12:40:02 parsed 1 programs 2020/01/18 12:40:02 executed programs: 0 [ 51.525725] IPVS: ftp: loaded support on port[0] = 21 [ 51.542234] IPVS: ftp: loaded support on port[0] = 21 [ 51.574671] IPVS: ftp: loaded support on port[0] = 21 [ 51.581679] IPVS: ftp: loaded support on port[0] = 21 [ 51.586380] IPVS: ftp: loaded support on port[0] = 21 [ 51.644119] IPVS: ftp: loaded support on port[0] = 21 [ 51.667496] chnl_net:caif_netlink_parms(): no params data found [ 51.739888] bridge0: port 1(bridge_slave_0) entered blocking state [ 51.746828] bridge0: port 1(bridge_slave_0) entered disabled state [ 51.754056] device bridge_slave_0 entered promiscuous mode [ 51.778972] bridge0: port 2(bridge_slave_1) entered blocking state [ 51.785851] bridge0: port 2(bridge_slave_1) entered disabled state [ 51.792830] device bridge_slave_1 entered promiscuous mode [ 51.821877] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 51.831559] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 51.860134] chnl_net:caif_netlink_parms(): no params data found [ 51.881413] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 51.888843] team0: Port device team_slave_0 added [ 51.896874] chnl_net:caif_netlink_parms(): no params data found [ 51.921414] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 51.928800] team0: Port device team_slave_1 added [ 51.965823] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 52.005478] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 52.024446] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.031041] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.038143] device bridge_slave_0 entered promiscuous mode [ 52.046480] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.052931] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.059795] device bridge_slave_1 entered promiscuous mode [ 52.102866] device hsr_slave_0 entered promiscuous mode [ 52.150753] device hsr_slave_1 entered promiscuous mode [ 52.192146] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 52.198878] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.205781] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.212742] device bridge_slave_0 entered promiscuous mode [ 52.219219] chnl_net:caif_netlink_parms(): no params data found [ 52.236588] chnl_net:caif_netlink_parms(): no params data found [ 52.249852] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 52.256867] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.263705] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.270825] device bridge_slave_1 entered promiscuous mode [ 52.312877] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 52.337770] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.344247] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.351555] device bridge_slave_0 entered promiscuous mode [ 52.363317] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 52.392777] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.399167] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.406624] device bridge_slave_0 entered promiscuous mode [ 52.413274] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.419792] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.427150] device bridge_slave_1 entered promiscuous mode [ 52.443343] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 52.452518] chnl_net:caif_netlink_parms(): no params data found [ 52.461208] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.467598] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.474828] device bridge_slave_1 entered promiscuous mode [ 52.489720] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 52.497120] team0: Port device team_slave_0 added [ 52.503399] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 52.516158] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 52.528842] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 52.540812] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.547269] bridge0: port 2(bridge_slave_1) entered forwarding state [ 52.554312] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.560710] bridge0: port 1(bridge_slave_0) entered forwarding state [ 52.569767] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 52.579820] team0: Port device team_slave_1 added [ 52.596510] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 52.617275] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 52.624716] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 52.634310] team0: Port device team_slave_0 added [ 52.640265] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 52.658368] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 52.666515] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 52.674093] team0: Port device team_slave_1 added [ 52.683395] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 52.691847] team0: Port device team_slave_0 added [ 52.697599] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 52.705260] team0: Port device team_slave_1 added [ 52.714207] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 52.727802] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 52.735185] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.742276] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.749125] device bridge_slave_0 entered promiscuous mode [ 52.757743] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.765258] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.781436] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 52.792636] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 52.799821] team0: Port device team_slave_0 added [ 52.805358] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 52.812724] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.819086] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.826486] device bridge_slave_1 entered promiscuous mode [ 52.892075] device hsr_slave_0 entered promiscuous mode [ 52.940710] device hsr_slave_1 entered promiscuous mode [ 52.991003] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 52.998332] team0: Port device team_slave_1 added [ 53.008223] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 53.016280] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 53.072892] device hsr_slave_0 entered promiscuous mode [ 53.110861] device hsr_slave_1 entered promiscuous mode [ 53.150970] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 53.157798] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 53.170175] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 53.191212] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 53.199109] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 53.243143] device hsr_slave_0 entered promiscuous mode [ 53.290863] device hsr_slave_1 entered promiscuous mode [ 53.331580] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 53.372827] device hsr_slave_0 entered promiscuous mode [ 53.410797] device hsr_slave_1 entered promiscuous mode [ 53.451543] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 53.459416] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 53.467405] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 53.480628] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 53.498017] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 53.507923] team0: Port device team_slave_0 added [ 53.514469] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 53.524388] team0: Port device team_slave_1 added [ 53.529846] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 53.537842] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 53.554702] 8021q: adding VLAN 0 to HW filter on device bond0 [ 53.574842] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 53.582168] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 53.590799] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 53.600141] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 53.632078] device hsr_slave_0 entered promiscuous mode [ 53.680990] device hsr_slave_1 entered promiscuous mode [ 53.721801] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 53.731618] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 53.739374] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 53.747649] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 53.753793] 8021q: adding VLAN 0 to HW filter on device team0 [ 53.764189] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 53.779964] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 53.790201] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 53.815432] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 53.826070] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 53.839021] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 53.847512] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 53.855457] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.861831] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.868906] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 53.877807] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 53.885483] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.892521] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.905834] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 53.917311] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 53.926602] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 53.936885] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 53.947939] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 53.961897] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 53.969637] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 53.977627] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 53.985579] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 53.994955] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 54.008501] 8021q: adding VLAN 0 to HW filter on device bond0 [ 54.017346] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 54.026260] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 54.042793] IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready [ 54.053017] IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready [ 54.064022] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 54.071305] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 54.078783] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 54.089138] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 54.096842] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 54.116358] 8021q: adding VLAN 0 to HW filter on device bond0 [ 54.125040] 8021q: adding VLAN 0 to HW filter on device bond0 [ 54.132572] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 54.141420] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 54.147514] 8021q: adding VLAN 0 to HW filter on device team0 [ 54.154978] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 54.161939] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 54.185122] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 54.192122] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 54.200872] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 54.208649] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 54.215664] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 54.222912] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 54.235918] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 54.244045] 8021q: adding VLAN 0 to HW filter on device bond0 [ 54.252796] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 54.259780] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 54.267761] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 54.280369] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 54.287078] 8021q: adding VLAN 0 to HW filter on device team0 [ 54.295575] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 54.305249] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 54.312222] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 54.319968] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 54.328758] bridge0: port 1(bridge_slave_0) entered blocking state [ 54.335135] bridge0: port 1(bridge_slave_0) entered forwarding state [ 54.343817] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 54.353116] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 54.360097] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 54.368397] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 54.375635] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 54.382986] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 54.389848] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 54.397903] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 54.405925] bridge0: port 2(bridge_slave_1) entered blocking state [ 54.412300] bridge0: port 2(bridge_slave_1) entered forwarding state [ 54.422214] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 54.435054] 8021q: adding VLAN 0 to HW filter on device bond0 [ 54.441629] audit: type=1400 audit(1579351205.923:40): avc: denied { associate } for pid=7320 comm="syz-executor.0" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 [ 54.472209] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 54.478428] 8021q: adding VLAN 0 to HW filter on device team0 [ 54.487816] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 54.498766] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 54.509002] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 54.515714] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 54.524071] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 54.535447] bridge0: port 1(bridge_slave_0) entered blocking state [ 54.542217] bridge0: port 1(bridge_slave_0) entered forwarding state [ 54.549753] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 54.558169] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 54.565872] bridge0: port 2(bridge_slave_1) entered blocking state [ 54.572279] bridge0: port 2(bridge_slave_1) entered forwarding state [ 54.579166] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 54.586237] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 54.594448] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 54.607659] ================================================================== [ 54.614576] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 54.615143] BUG: KASAN: use-after-free in eth_type_trans+0x5c1/0x6e0 [ 54.626692] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 54.628843] Read of size 8 at addr ffff888076bf0040 by task syz-executor.0/7343 [ 54.628845] [ 54.628852] CPU: 0 PID: 7343 Comm: syz-executor.0 Not tainted 4.19.97-syzkaller #0 [ 54.628854] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.628857] Call Trace: [ 54.628870] dump_stack+0x123/0x177 [ 54.628882] print_address_description.cold.8+0x9/0x1ff [ 54.639137] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 54.643388] kasan_report.cold.9+0x242/0x309 [ 54.643397] ? eth_type_trans+0x5c1/0x6e0 [ 54.643404] __asan_report_load8_noabort+0x14/0x20 [ 54.643408] eth_type_trans+0x5c1/0x6e0 [ 54.643414] ? eth_gro_receive+0x960/0x960 [ 54.643427] napi_gro_frags+0x546/0x8e0 [ 54.643438] tun_get_user+0x25ef/0x4780 [ 54.643451] ? tun_build_skb.isra.53+0x14c0/0x14c0 [ 54.643461] ? mark_held_locks+0x130/0x130 [ 54.643470] ? find_held_lock+0x36/0x1d0 [ 54.643480] ? tun_get+0xf3/0x1d0 [ 54.643485] ? lock_downgrade+0x860/0x860 [ 54.643492] ? kasan_check_read+0x11/0x20 [ 54.643502] tun_chr_write_iter+0xaf/0x150 [ 54.643510] do_iter_readv_writev+0x4ae/0x960 [ 54.643521] ? vfs_dedupe_file_range+0x5a0/0x5a0 [ 54.648041] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 54.653070] ? rw_verify_area+0xb8/0x2b0 [ 54.653081] do_iter_write+0x12a/0x510 [ 54.653087] ? dup_iter+0x250/0x250 [ 54.653097] vfs_writev+0x16f/0x2d0 [ 54.653102] ? __fget+0x278/0x400 [ 54.653108] ? vfs_iter_write+0xb0/0xb0 [ 54.653116] ? kasan_check_read+0x11/0x20 [ 54.653123] ? __fget+0x295/0x400 [ 54.653131] ? ksys_dup3+0x2e0/0x2e0 [ 54.653141] ? __fget_light+0x174/0x1e0 [ 54.653154] do_writev+0x110/0x330 [ 54.653165] ? vfs_writev+0x2d0/0x2d0 [ 54.653172] ? do_syscall_64+0x21/0x4e0 [ 54.653178] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.653188] __x64_sys_writev+0x70/0xb0 [ 54.653194] do_syscall_64+0xd0/0x4e0 [ 54.653200] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.653205] RIP: 0033:0x45a7d1 [ 54.653211] Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 e4 b7 fb ff c3 48 83 ec 08 e8 fa 2c 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 43 2d 00 00 48 89 d0 48 83 c4 08 48 3d 01 [ 54.653214] RSP: 002b:00007f5a6cfe6ba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 [ 54.653220] RAX: ffffffffffffffda RBX: 0000000000207843 RCX: 000000000045a7d1 [ 54.653223] RDX: 0000000000000001 RSI: 00007f5a6cfe6c00 RDI: 00000000000000f0 [ 54.653226] RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 [ 54.653228] R10: 00007f5a6cfe79d0 R11: 0000000000000293 R12: 00007f5a6cfe76d4 [ 54.653230] R13: 00000000004cab1f R14: 00000000004e4040 R15: 00000000ffffffff [ 54.653241] [ 54.653243] The buggy address belongs to the page: [ 54.653248] page:ffffea0001dafc00 count:0 mapcount:0 mapping:0000000000000000 index:0x0 [ 54.653253] flags: 0xfffe0000000000() [ 54.653259] raw: 00fffe0000000000 ffffea0001dafc08 ffffea0001dafc08 0000000000000000 [ 54.653263] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 54.653265] page dumped because: kasan: bad access detected [ 54.653267] [ 54.653269] Memory state around the buggy address: [ 54.653273] ffff888076beff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 54.653277] ffff888076beff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 54.653279] >ffff888076bf0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 54.653282] ^ [ 54.653284] ffff888076bf0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 54.653287] ffff888076bf0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 54.653290] ================================================================== [ 54.653292] Disabling lock debugging due to kernel taint [ 54.653328] Kernel panic - not syncing: panic_on_warn set ... [ 54.653328] [ 54.653335] CPU: 0 PID: 7343 Comm: syz-executor.0 Tainted: G B 4.19.97-syzkaller #0 [ 54.653337] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.653339] Call Trace: [ 54.653345] dump_stack+0x123/0x177 [ 54.653350] panic+0x1cd/0x375 [ 54.653353] ? __warn_printk+0xd6/0xd6 [ 54.653360] ? do_raw_spin_unlock+0x54/0x260 [ 54.653366] kasan_end_report+0x47/0x4f [ 54.653371] kasan_report.cold.9+0x76/0x309 [ 54.653376] ? eth_type_trans+0x5c1/0x6e0 [ 54.653382] __asan_report_load8_noabort+0x14/0x20 [ 54.653385] eth_type_trans+0x5c1/0x6e0 [ 54.653390] ? eth_gro_receive+0x960/0x960 [ 54.653399] napi_gro_frags+0x546/0x8e0 [ 54.653407] tun_get_user+0x25ef/0x4780 [ 54.653415] ? tun_build_skb.isra.53+0x14c0/0x14c0 [ 54.653420] ? mark_held_locks+0x130/0x130 [ 54.653427] ? find_held_lock+0x36/0x1d0 [ 54.653434] ? tun_get+0xf3/0x1d0 [ 54.653437] ? lock_downgrade+0x860/0x860 [ 54.653441] ? kasan_check_read+0x11/0x20 [ 54.653447] tun_chr_write_iter+0xaf/0x150 [ 54.653453] do_iter_readv_writev+0x4ae/0x960 [ 54.653458] ? vfs_dedupe_file_range+0x5a0/0x5a0 [ 54.653464] ? rw_verify_area+0xb8/0x2b0 [ 54.653469] do_iter_write+0x12a/0x510 [ 54.653474] ? dup_iter+0x250/0x250 [ 54.653480] vfs_writev+0x16f/0x2d0 [ 54.653484] ? __fget+0x278/0x400 [ 54.653488] ? vfs_iter_write+0xb0/0xb0 [ 54.653493] ? kasan_check_read+0x11/0x20 [ 54.653498] ? __fget+0x295/0x400 [ 54.653503] ? ksys_dup3+0x2e0/0x2e0 [ 54.653510] ? __fget_light+0x174/0x1e0 [ 54.653516] do_writev+0x110/0x330 [ 54.653520] ? vfs_writev+0x2d0/0x2d0 [ 54.653525] ? do_syscall_64+0x21/0x4e0 [ 54.653528] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.653534] __x64_sys_writev+0x70/0xb0 [ 54.653539] do_syscall_64+0xd0/0x4e0 [ 54.653544] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.653547] RIP: 0033:0x45a7d1 [ 54.653551] Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 e4 b7 fb ff c3 48 83 ec 08 e8 fa 2c 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 43 2d 00 00 48 89 d0 48 83 c4 08 48 3d 01 [ 54.653553] RSP: 002b:00007f5a6cfe6ba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 [ 54.653557] RAX: ffffffffffffffda RBX: 0000000000207843 RCX: 000000000045a7d1 [ 54.653560] RDX: 0000000000000001 RSI: 00007f5a6cfe6c00 RDI: 00000000000000f0 [ 54.653562] RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 [ 54.653565] R10: 00007f5a6cfe79d0 R11: 0000000000000293 R12: 00007f5a6cfe76d4 [ 54.653567] R13: 00000000004cab1f R14: 00000000004e4040 R15: 00000000ffffffff [ 54.654984] Kernel Offset: disabled [ 55.256370] Rebooting in 86400 seconds..