syzkaller login: [ 94.799243][ T3139] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 94.823496][ T3139] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 94.831776][ T3139] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:37243' (ECDSA) to the list of known hosts. 1970/01/01 00:01:50 fuzzer started 1970/01/01 00:01:53 connecting to host at localhost:46573 1970/01/01 00:01:53 checking machine... 1970/01/01 00:01:53 checking revisions... 1970/01/01 00:01:54 testing simple program... executing program executing program [ 120.603127][ T3301] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 120.645353][ T3301] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 122.644607][ T3301] device hsr_slave_0 entered promiscuous mode [ 122.742093][ T3301] device hsr_slave_1 entered promiscuous mode executing program [ 124.352422][ T3301] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 124.416851][ T3301] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 124.505591][ T3301] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 124.574604][ T3301] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 126.457351][ T3301] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 126.595489][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 126.613091][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 127.639360][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 127.657924][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 127.731571][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 127.742641][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 127.840498][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 127.934739][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 128.162777][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 128.173691][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 128.255008][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 128.280986][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 128.362575][ T3301] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 128.664732][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 128.668601][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 130.657196][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 130.662923][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 131.585051][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 131.594358][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 131.628019][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 131.634147][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 131.669377][ T3301] device veth0_vlan entered promiscuous mode [ 131.763502][ T3301] device veth1_vlan entered promiscuous mode [ 132.058711][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 132.081935][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 132.138616][ T3301] device veth0_macvtap entered promiscuous mode [ 132.209914][ T3301] device veth1_macvtap entered promiscuous mode [ 132.380396][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 132.395722][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 132.403612][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 132.409950][ T3416] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 132.477215][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 132.488140][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 132.563254][ T3301] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 132.564729][ T3301] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 132.567407][ T3301] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 132.568678][ T3301] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 133.567322][ T3301] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation 1970/01/01 00:02:13 building call list... [ 134.535416][ T40] ------------[ cut here ]------------ [ 134.548927][ T40] hook not found, pf 3 num 0 [ 134.549792][ T40] WARNING: CPU: 1 PID: 40 at net/netfilter/core.c:480 __nf_unregister_net_hook+0xac/0x1d0 [ 134.552188][ T40] Modules linked in: [ 134.553251][ T40] CPU: 1 PID: 40 Comm: kworker/u4:3 Not tainted 5.12.0-syzkaller-14236-ga79cdfba68a1 #0 [ 134.555693][ T40] Hardware name: linux,dummy-virt (DT) [ 134.557428][ T40] Workqueue: netns cleanup_net [ 134.558669][ T40] pstate: 60400009 (nZCv daif +PAN -UAO -TCO BTYPE=--) [ 134.559585][ T40] pc : __nf_unregister_net_hook+0xac/0x1d0 [ 134.560417][ T40] lr : __nf_unregister_net_hook+0xac/0x1d0 [ 134.561210][ T40] sp : ffff800012cb3c80 [ 134.561960][ T40] x29: ffff800012cb3c80 x28: ffff80001293d508 [ 134.563120][ T40] x27: ffff800012739838 x26: ffff8000128f4240 [ 134.564137][ T40] x25: ffff8000128f43c0 x24: f1ff000009854e00 [ 134.565166][ T40] x23: f1ff0000068009f0 x22: f1ff000006800000 [ 134.568540][ T40] x21: ffff8000128fc390 x20: 0000000000000003 [ 134.569613][ T40] x19: faff00000599f400 x18: 00000000fffffffe [ 134.570826][ T40] x17: 0000000000000000 x16: 0000000000000000 [ 134.571987][ T40] x15: 0000000000000020 x14: ffffffffffffffff [ 134.573231][ T40] x13: 00000000000002f9 x12: ffff800012cb3950 [ 134.574521][ T40] x11: ffff8000127f0da0 x10: ffff80001274cbe0 [ 134.575690][ T40] x9 : ffff8000127ec648 x8 : ffff80001273c648 [ 134.577166][ T40] x7 : ffff8000127ec648 x6 : fffffffffffcbd88 [ 134.578232][ T40] x5 : ffff00007fbd0948 x4 : 0000000000015ff5 [ 134.579082][ T40] x3 : 0000000000000001 x2 : 0000000000000000 [ 134.580903][ T40] x1 : 0000000000000000 x0 : f3ff0000032e0000 [ 134.582146][ T40] Call trace: [ 134.582535][ T40] __nf_unregister_net_hook+0xac/0x1d0 [ 134.583279][ T40] nf_unregister_net_hooks+0x88/0xac [ 134.584116][ T40] arpt_unregister_table_pre_exit+0x40/0x50 [ 134.584885][ T40] arptable_filter_net_pre_exit+0x20/0x2c [ 134.585591][ T40] cleanup_net+0x200/0x410 [ 134.586665][ T40] process_one_work+0x1d8/0x364 [ 134.587246][ T40] worker_thread+0x70/0x434 [ 134.587673][ T40] kthread+0x174/0x180 [ 134.588071][ T40] ret_from_fork+0x10/0x34 [ 134.589215][ T40] ---[ end trace fd67af665a8c342c ]--- [ 134.682472][ T40] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 134.857243][ T40] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 135.020318][ T40] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 135.182533][ T40] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 138.150483][ T40] device hsr_slave_0 left promiscuous mode [ 138.219252][ T40] device hsr_slave_1 left promiscuous mode [ 138.387036][ T40] device veth1_macvtap left promiscuous mode [ 138.388277][ T40] device veth0_macvtap left promiscuous mode [ 138.390160][ T40] device veth1_vlan left promiscuous mode [ 138.391401][ T40] device veth0_vlan left promiscuous mode executing program [ 141.181639][ T40] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 141.288360][ T40] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 141.929278][ T40] bond0 (unregistering): Released all slaves [ 143.221320][ T40] ================================================================== [ 143.222282][ T40] BUG: KASAN: invalid-access in hooks_validate+0x38/0x7c [ 143.223397][ T40] Read at addr f0ff000009854d48 by task kworker/u4:3/40 [ 143.224353][ T40] Pointer tag: [f0], memory tag: [fe] [ 143.225106][ T40] [ 143.225814][ T40] CPU: 1 PID: 40 Comm: kworker/u4:3 Tainted: G W 5.12.0-syzkaller-14236-ga79cdfba68a1 #0 [ 143.227356][ T40] Hardware name: linux,dummy-virt (DT) [ 143.228097][ T40] Workqueue: netns cleanup_net [ 143.228965][ T40] Call trace: [ 143.229505][ T40] dump_backtrace+0x0/0x1b0 [ 143.230223][ T40] show_stack+0x18/0x24 [ 143.231051][ T40] dump_stack+0xd0/0x12c [ 143.231732][ T40] print_address_description+0x70/0x2ac [ 143.232502][ T40] kasan_report+0x134/0x380 [ 143.233175][ T40] __do_kernel_fault+0x1a8/0x1dc [ 143.233913][ T40] do_tag_check_fault+0x74/0x90 [ 143.234695][ T40] do_mem_abort+0x44/0xbc [ 143.235397][ T40] el1_abort+0x40/0x60 [ 143.236340][ T40] el1_sync_handler+0xac/0xd0 [ 143.237037][ T40] el1_sync+0x70/0x100 [ 143.237686][ T40] hooks_validate+0x38/0x7c [ 143.239005][ T40] __nf_unregister_net_hook+0x114/0x1d0 [ 143.240055][ T40] nf_unregister_net_hook+0x64/0x74 [ 143.241447][ T40] clusterip_net_exit+0x60/0x7c [ 143.242172][ T40] ops_exit_list+0x44/0x80 [ 143.242933][ T40] cleanup_net+0x23c/0x410 [ 143.243610][ T40] process_one_work+0x1d8/0x364 [ 143.244493][ T40] worker_thread+0x70/0x434 [ 143.245215][ T40] kthread+0x174/0x180 [ 143.245977][ T40] ret_from_fork+0x10/0x34 [ 143.246992][ T40] [ 143.247931][ T40] Allocated by task 0: [ 143.248675][ T40] (stack is not available) [ 143.249658][ T40] [ 143.250164][ T40] Freed by task 40: [ 143.250881][ T40] kasan_save_stack+0x28/0x5c [ 143.251750][ T40] kasan_set_track+0x28/0x40 [ 143.252445][ T40] kasan_set_free_info+0x20/0x30 [ 143.253153][ T40] ____kasan_slab_free.constprop.0+0x1dc/0x254 [ 143.253971][ T40] __kasan_slab_free+0x10/0x1c [ 143.256230][ T40] slab_free_freelist_hook+0xc0/0x220 [ 143.257311][ T40] kfree+0x350/0x4c4 [ 143.258005][ T40] xt_unregister_table+0x8c/0xcc [ 143.258940][ T40] __arpt_unregister_table+0x2c/0xcc [ 143.259726][ T40] arpt_unregister_table+0x30/0x40 [ 143.260521][ T40] arptable_filter_net_exit+0x18/0x24 [ 143.261286][ T40] ops_exit_list+0x44/0x80 [ 143.261959][ T40] cleanup_net+0x23c/0x410 [ 143.262661][ T40] process_one_work+0x1d8/0x364 [ 143.263380][ T40] worker_thread+0x70/0x434 [ 143.264054][ T40] kthread+0x174/0x180 [ 143.264708][ T40] ret_from_fork+0x10/0x34 [ 143.265513][ T40] [ 143.266199][ T40] The buggy address belongs to the object at ffff000009854d00 [ 143.266199][ T40] which belongs to the cache kmalloc-128 of size 128 [ 143.270335][ T40] The buggy address is located 72 bytes inside of [ 143.270335][ T40] 128-byte region [ffff000009854d00, ffff000009854d80) [ 143.271928][ T40] The buggy address belongs to the page: [ 143.273281][ T40] page:000000000bb102d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf7ff000009854a00 pfn:0x49854 [ 143.275471][ T40] flags: 0x1ffc00000000200(slab|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 143.277533][ T40] raw: 01ffc00000000200 fffffc000025aec8 fffffc0000258948 fbff000003001200 [ 143.279065][ T40] raw: f7ff000009854a00 0000000000100007 00000001ffffffff 0000000000000000 [ 143.280377][ T40] page dumped because: kasan: bad access detected [ 143.281494][ T40] [ 143.282009][ T40] Memory state around the buggy address: [ 143.286697][ T40] ffff000009854b00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 143.288953][ T40] ffff000009854c00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 143.289922][ T40] >ffff000009854d00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 143.291796][ T40] ^ [ 143.292617][ T40] ffff000009854e00: f1 f1 f1 f1 fe fe fe fe fe fe fe fe fe fe fe fe [ 143.294935][ T40] ffff000009854f00: f1 f1 f1 f1 f1 fe fe fe fe fe fe fe fe fe fe fe [ 143.296190][ T40] ================================================================== [ 143.297135][ T40] Disabling lock debugging due to kernel taint executing program executing program executing program executing program executing program [ 157.088041][ T3295] can: request_module (can-proto-0) failed. [ 157.272977][ T3295] can: request_module (can-proto-0) failed. [ 157.489161][ T3295] can: request_module (can-proto-0) failed. executing program executing program VM DIAGNOSIS: 21:05:18 Registers: info registers vcpu 0 PC=00000000000af510 X00=0000000000000006 X01=00000040005c5cbb X02=0000000000002145 X03=0000000000000000 X04=0000000000000000 X05=0000000000000000 X06=0000000000000001 X07=0000000000000001 X08=000000000000003f X09=0000000000000200 X10=303038666666660a X11=3030303866666666 X12=3030303030303031 X13=000000007fffffff X14=0000000000000011 X15=0000000000000003 X16=0000000000000012 X17=0000000000000011 X18=0000000000000000 X19=0000ffffb2f04000 X20=0000004000305ba0 X21=0000004000261400 X22=00000040002f8000 X23=0000000000000012 X24=0000000000000001 X25=0000000000000000 X26=0000004000307240 X27=00000000013d68a0 X28=0000004000000180 X29=0000004000307108 X30=00000000000af4f0 SP=0000004000307110 PSTATE=80000000 N--- EL0t BTYPE=0 FPCR=00000000 FPSR=00000010 P00=0000 P01=0000 P02=0000 P03=0000 P04=0000 P05=0000 P06=0000 P07=0000 P08=0000 P09=0000 P10=0000 P11=0000 P12=0000 P13=0000 P14=0000 P15=0000 FFR=0000 Z00=0000000000000000:0000000000000008 Z01=0000000000000000:c1162e42fefa39ef Z02=0000000000000000:bfe62e42fefa39ef Z03=0000000000100000:0000000000000000 Z04=0000000000000000:0000000000000000 Z05=4010040140100401:4010040140100401 Z06=0000000000100000:0000000000100000 Z07=0000000000000000:0000000000000001 Z08=0000000000000000:0000000000000003 Z09=0000000000000000:3fe5a54e5170a8f6 Z10=0000000000000000:3fe0000000000000 Z11=0000000000000000:0000000000000000 Z12=0000000000000000:0000000000000000 Z13=0000000000000000:0000000000000000 Z14=0000000000000000:0000000000000000 Z15=0000000000000000:0000000000000000 Z16=0000000000000000:0000000000000000 Z17=0000000000000000:0000000000000000 Z18=0000000000000000:0000000000000000 Z19=0000000000000000:0000000000000000 Z20=0000000000000000:0000000000000000 Z21=0000000000000000:0000000000000000 Z22=0000000000000000:0000000000000000 Z23=0000000000000000:0000000000000000 Z24=0000000000000000:0000000000000000 Z25=0000000000000000:0000000000000000 Z26=0000000000000000:0000000000000000 Z27=0000000000000000:0000000000000000 Z28=0000000000000000:0000000000000000 Z29=0000000000000000:0000000000000000 Z30=0000000000000008:0000000081c418b7 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800010768cfc X00=ffff800012ac5000 X01=0000000000000002 X02=0000000000000000 X03=0000000000000018 X04=fbff000003371080 X05=000000000000002c X06=ffff80001294098f X07=6c203a656d616e20 X08=6d75642c78756e69 X09=ffff800012cb34b0 X10=ffff80001274cd40 X11=ffff8000127f0e00 X12=ffff800012cb352d X13=ffff800012cb3538 X14=ffffffffffffffff X15=0000000000000020 X16=0000000000000000 X17=0000000000000000 X18=00000000fffffffd X19=ffff8000129409a4 X20=ffff800010768cd4 X21=fbff000003371080 X22=ffff8000129409b4 X23=0000000000000f01 X24=000000000000003c X25=ffff80001270fe08 X26=ffff80001285cca8 X27=ffff800012940978 X28=ffff8000129407d0 X29=ffff800012cb3560 X30=ffff800010768cfc SP=ffff800012cb3560 PSTATE=804003c9 N--- EL2h BTYPE=0 FPCR=00000000 FPSR=00000010 P00=0000 P01=0000 P02=0000 P03=0000 P04=0000 P05=0000 P06=0000 P07=0000 P08=0000 P09=0000 P10=0000 P11=0000 P12=0000 P13=0000 P14=0000 P15=0000 FFR=0000 Z00=0000000000000000:0000000000000000 Z01=0000000000000000:c1162e42fefa39ef Z02=4c63e0dfafc1155b:2b2aedfae55abbbc Z03=0000000040000000:0000000000000000 Z04=4010040140100401:4000000000000000 Z05=4010040140100401:4010040140100401 Z06=5555400000400000:5555400000400000 Z07=0000000000000000:0000000000000000 Z08=0000000000000000:0000000000000000 Z09=0000000000000000:0000000000000000 Z10=0000000000000000:0000000000000000 Z11=0000000000000000:0000000000000000 Z12=0000000000000000:0000000000000000 Z13=0000000000000000:0000000000000000 Z14=0000000000000000:0000000000000000 Z15=0000000000000000:0000000000000000 Z16=0000000000000000:0000000000000000 Z17=0000000000000000:0000000000000000 Z18=0000000000000000:0000000000000000 Z19=0000000000000000:0000000000000000 Z20=0000000000000000:0000000000000000 Z21=0000000000000000:0000000000000000 Z22=0000000000000000:0000000000000000 Z23=0000000000000000:0000000000000000 Z24=0000000000000000:0000000000000000 Z25=0000000000000000:0000000000000000 Z26=0000000000000000:0000000000000000 Z27=0000000000000000:0000000000000000 Z28=0000000000000000:0000000000000000 Z29=0000000000000000:0000000000000000 Z30=0000000000000010:000000198881a090 Z31=0000000000000000:0000000000000000