syzkaller login: [ 89.645401][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 89.653310][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 89.680606][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:40565' (ECDSA) to the list of known hosts. 1970/01/01 00:01:42 fuzzer started 1970/01/01 00:01:44 connecting to host at localhost:43943 1970/01/01 00:01:44 checking machine... 1970/01/01 00:01:44 checking revisions... 1970/01/01 00:01:46 testing simple program... executing program executing program [ 112.501862][ T2206] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 112.543527][ T2206] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 114.877450][ T2206] device hsr_slave_0 entered promiscuous mode [ 114.939878][ T2206] device hsr_slave_1 entered promiscuous mode [ 116.791137][ T2206] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 116.891069][ T2206] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 116.970607][ T2206] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 117.059906][ T2206] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 119.574006][ T2206] 8021q: adding VLAN 0 to HW filter on device bond0 [ 119.690852][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 119.701913][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 120.707781][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 120.723557][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 120.791177][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 120.806303][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 120.869697][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 120.961542][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 121.187651][ T2516] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 121.199087][ T2516] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 121.254162][ T2516] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 121.273959][ T2516] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 121.331108][ T2206] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 121.539596][ T2523] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 121.541923][ T2523] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 123.381665][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 123.391065][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 124.549842][ T2516] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 124.567329][ T2516] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 124.599441][ T2516] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 124.616629][ T2516] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 124.645445][ T2206] device veth0_vlan entered promiscuous mode [ 124.747615][ T2206] device veth1_vlan entered promiscuous mode [ 125.107600][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 125.122219][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 125.173456][ T2206] device veth0_macvtap entered promiscuous mode [ 125.243180][ T2206] device veth1_macvtap entered promiscuous mode [ 125.419341][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 125.431155][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 125.450905][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 125.461448][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 125.550218][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 125.563679][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 125.623084][ T2206] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 125.624502][ T2206] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 125.631951][ T2206] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 125.633033][ T2206] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 126.279776][ T2206] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation executing program [ 127.010820][ T256] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:06 building call list... [ 127.233825][ T256] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 127.379209][ T256] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 127.567460][ T256] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 130.576130][ T256] device hsr_slave_0 left promiscuous mode [ 130.632299][ T256] device hsr_slave_1 left promiscuous mode [ 130.779209][ T256] device veth1_macvtap left promiscuous mode [ 130.780406][ T256] device veth0_macvtap left promiscuous mode [ 130.783090][ T256] device veth1_vlan left promiscuous mode [ 130.784278][ T256] device veth0_vlan left promiscuous mode [ 132.081683][ T22] ================================================================== [ 132.082750][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xddc/0x10000 [ 132.084328][ T22] Read at addr fbff000002981060 by task kdevtmpfs/22 [ 132.085547][ T22] Pointer tag: [fb], memory tag: [fe] [ 132.086531][ T22] [ 132.088080][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-10807-gbf9f243f23e6 #0 [ 132.089293][ T22] Hardware name: linux,dummy-virt (DT) [ 132.090313][ T22] Call trace: [ 132.090876][ T22] dump_backtrace+0x0/0x1ac [ 132.091665][ T22] show_stack+0x18/0x24 [ 132.092425][ T22] dump_stack_lvl+0x68/0x84 [ 132.093147][ T22] print_address_description+0x7c/0x2b4 [ 132.093903][ T22] kasan_report+0x134/0x380 [ 132.094759][ T22] __do_kernel_fault+0x128/0x1bc [ 132.095661][ T22] do_tag_check_fault+0x74/0x90 [ 132.096413][ T22] do_mem_abort+0x44/0xb4 [ 132.097122][ T22] el1_abort+0x40/0x60 [ 132.097785][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 132.098501][ T22] el1h_64_sync+0x78/0x7c [ 132.099167][ T22] __entry_tramp_text_end+0xddc/0x10000 [ 132.099977][ T22] d_lookup+0x44/0x70 [ 132.100649][ T22] lookup_dcache+0x24/0x84 [ 132.101377][ T22] __lookup_hash+0x24/0xd0 [ 132.102139][ T22] kern_path_locked+0x90/0x10c [ 132.102886][ T22] handle_remove+0x38/0x284 [ 132.103563][ T22] devtmpfsd+0x8c/0xd0 [ 132.104265][ T22] kthread+0x150/0x15c [ 132.105171][ T22] ret_from_fork+0x10/0x20 [ 132.106178][ T22] [ 132.106751][ T22] Allocated by task 22: [ 132.107498][ T22] kasan_save_stack+0x28/0x60 [ 132.108356][ T22] __kasan_slab_alloc+0xb0/0x110 [ 132.109057][ T22] kmem_cache_alloc+0x194/0x2f4 [ 132.109888][ T22] getname_kernel+0x30/0x150 [ 132.110582][ T22] kern_path_locked+0x2c/0x10c [ 132.112523][ T22] handle_remove+0x38/0x284 [ 132.114307][ T22] devtmpfsd+0x8c/0xd0 [ 132.116473][ T22] kthread+0x150/0x15c [ 132.118088][ T22] ret_from_fork+0x10/0x20 [ 132.118895][ T22] [ 132.119336][ T22] Freed by task 22: [ 132.119884][ T22] kasan_save_stack+0x28/0x60 [ 132.120571][ T22] kasan_set_track+0x28/0x3c [ 132.121338][ T22] kasan_set_free_info+0x20/0x30 [ 132.122128][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 132.122984][ T22] __kasan_slab_free+0x10/0x1c [ 132.123677][ T22] slab_free_freelist_hook+0xc4/0x20c [ 132.124438][ T22] kmem_cache_free+0x9c/0x3d4 [ 132.125419][ T22] putname.part.0+0x68/0x7c [ 132.126194][ T22] kern_path_locked+0x64/0x10c [ 132.126952][ T22] handle_remove+0x38/0x284 [ 132.127694][ T22] devtmpfsd+0x8c/0xd0 [ 132.128434][ T22] kthread+0x150/0x15c [ 132.129119][ T22] ret_from_fork+0x10/0x20 [ 132.129866][ T22] [ 132.130285][ T22] The buggy address belongs to the object at ffff000002981040 [ 132.130285][ T22] which belongs to the cache names_cache of size 4096 [ 132.131697][ T22] The buggy address is located 32 bytes inside of [ 132.131697][ T22] 4096-byte region [ffff000002981040, ffff000002982040) [ 132.133104][ T22] The buggy address belongs to the page: [ 132.134012][ T22] page:00000000a392b467 refcount:1 mapcount:0 mapping:0000000000000000 index:0xfdff000002982080 pfn:0x42980 [ 132.135800][ T22] head:00000000a392b467 order:3 compound_mapcount:0 compound_pincount:0 [ 132.136864][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 132.138558][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f8ff000002837700 [ 132.139631][ T22] raw: fdff000002982080 0000000080070003 00000001ffffffff 0000000000000000 [ 132.140679][ T22] page dumped because: kasan: bad access detected [ 132.141463][ T22] [ 132.141971][ T22] Memory state around the buggy address: [ 132.142872][ T22] ffff000002980e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 132.143838][ T22] ffff000002980f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 132.144959][ T22] >ffff000002981000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 132.145948][ T22] ^ [ 132.146804][ T22] ffff000002981100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 132.147746][ T22] ffff000002981200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 132.148730][ T22] ================================================================== [ 132.149676][ T22] Disabling lock debugging due to kernel taint executing program [ 133.437874][ T256] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 133.587379][ T256] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 134.284102][ T256] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program [ 149.442416][ T2203] can: request_module (can-proto-0) failed. [ 149.635977][ T2203] can: request_module (can-proto-0) failed. [ 149.780037][ T2203] can: request_module (can-proto-0) failed. executing program executing program executing program [ 158.302694][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 158.314147][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 158.323123][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 23:30:32 Registers: info registers vcpu 0 PC=ffff800010105c3c X00=ffff8000124680c8 X01=00003fffffffffff X02=00003fffffffffff X03=fffffffffffcc2e0 X04=fffffffffffc0010 X05=ffff80001224d1f0 X06=ffff80001224d110 X07=fffffffffff8c2f0 X08=0000000000000033 X09=ffff8000126ab900 X10=fffffffffffc0000 X11=ffff80001224d230 X12=fffffffffff8c2ef X13=0000000000000309 X14=0000000000000001 X15=0000000000000010 X16=6478302b646e655f X17=30303178302f6364 X18=fffffffffffcc2f0 X19=ffff80001224d1f0 X20=ffff8000126ab710 X21=ffff8000126ab6f8 X22=ffff80001225dd58 X23=ffff800012301b18 X24=ffff80001224d210 X25=0000000000000001 X26=0000000000000016 X27=ffff8000126ab710 X28=0000000000000004 X29=ffff8000126ab5e0 X30=67b8800010106448 SP=ffff8000126ab5e0 PSTATE=604000c9 -ZC- 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=0000000000000000:0000000000000004 Z01=0000000000000000:c1162e42fefa39ef Z02=e484325e5ddbf850:94836bf452509e8f 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=0000000000000010:000000179d5511c0 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000105f8a10 X00=ffff800011e1729e X01=ffff8000128c3b70 X02=0000000000000000 X03=0000000000041001 X04=0000000000000043 X05=0000000000000002 X06=0000000000000020 X07=000000000000000f X08=00000000ffffffff X09=ffff800011dff3c0 X10=0000000000000020 X11=0000000000000000 X12=f8ff0000092de000 X13=f8ff0000092df000 X14=0000000000000000 X15=0000000000000030 X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=f8ff0000092df000 X20=f8ff0000092de000 X21=ffff8000128c3c40 X22=ffff8000118e7598 X23=00000000ffffffe8 X24=0000000000001000 X25=0000000000000020 X26=ffff800011e172a1 X27=ffff800011e172a1 X28=f8ff0000092de03e X29=ffff8000128c3ad0 X30=9ef28000105fdc64 SP=ffff8000128c3b00 PSTATE=60400009 -ZC- 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=0000000000000000:3fcec8c57844c412 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:4117630000000000 Z04=0000000000000000:0000040000000000 Z05=4010040140100401:4010040140100401 Z06=0000040000000000:0000040000000000 Z07=0000000000000000:0000000000000001 Z08=0000000000000000:0000000000000001 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=000000000000000c:0000000084d3403d Z31=0000000000000000:0000000000000000