syzkaller login: [ 54.989794][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 55.005190][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 58.634449][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:62919' (ECDSA) to the list of known hosts. 1970/01/01 00:01:03 fuzzer started 1970/01/01 00:01:04 connecting to host at localhost:46425 1970/01/01 00:01:04 checking machine... 1970/01/01 00:01:04 checking revisions... 1970/01/01 00:01:05 testing simple program... executing program [ 69.268887][ T3330] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 69.293640][ T3330] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 70.699169][ T3330] device hsr_slave_0 entered promiscuous mode [ 70.755873][ T3330] device hsr_slave_1 entered promiscuous mode executing program [ 71.927894][ T3330] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 72.005079][ T3330] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 72.067973][ T3330] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 72.134926][ T3330] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.229342][ T3330] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.294903][ T2270] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 73.300111][ T2270] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 73.886006][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 73.896020][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 73.931910][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 73.936566][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 73.968732][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 74.011501][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 74.109467][ T2270] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 74.115161][ T2270] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 74.161537][ T2270] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 74.166306][ T2270] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.209047][ T3330] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.330267][ T2270] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.332738][ T2270] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 75.551750][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 75.556726][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 76.182474][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 76.188081][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 76.205746][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 76.210433][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 76.233537][ T3330] device veth0_vlan entered promiscuous mode [ 76.301669][ T3330] device veth1_vlan entered promiscuous mode [ 76.478631][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 76.484694][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 76.489414][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 76.496393][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 76.530557][ T3330] device veth0_macvtap entered promiscuous mode [ 76.563381][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 76.573749][ T3330] device veth1_macvtap entered promiscuous mode [ 76.700426][ T2270] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 76.707891][ T2270] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 76.746333][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 76.754261][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 76.789057][ T3330] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.789990][ T3330] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.790675][ T3330] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.791773][ T3330] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 77.167461][ T3330] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 77.567028][ T26] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:01:17 building call list... [ 77.716329][ T26] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.837541][ T26] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.945779][ T26] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 80.231348][ T26] device hsr_slave_0 left promiscuous mode [ 80.284353][ T26] device hsr_slave_1 left promiscuous mode [ 80.387505][ T26] device veth1_macvtap left promiscuous mode [ 80.388224][ T26] device veth0_macvtap left promiscuous mode [ 80.389826][ T26] device veth1_vlan left promiscuous mode [ 80.390535][ T26] device veth0_vlan left promiscuous mode [ 81.127458][ T22] ================================================================== [ 81.128073][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x9000 [ 81.129046][ T22] Read at addr f2ff000002994120 by task kdevtmpfs/22 [ 81.129593][ T22] Pointer tag: [f2], memory tag: [fe] [ 81.130060][ T22] [ 81.131539][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-08747-ga9c9a6f741cd #0 [ 81.132653][ T22] Hardware name: linux,dummy-virt (DT) [ 81.133243][ T22] Call trace: [ 81.133549][ T22] dump_backtrace+0x0/0x1ac [ 81.133993][ T22] show_stack+0x18/0x24 [ 81.134392][ T22] dump_stack_lvl+0x68/0x84 [ 81.134787][ T22] print_address_description+0x7c/0x2b4 [ 81.135218][ T22] kasan_report+0x134/0x380 [ 81.135611][ T22] __do_kernel_fault+0x128/0x1bc [ 81.136021][ T22] do_tag_check_fault+0x74/0x90 [ 81.136433][ T22] do_mem_abort+0x44/0xb4 [ 81.136810][ T22] el1_abort+0x40/0x60 [ 81.137185][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 81.137602][ T22] el1h_64_sync+0x78/0x7c [ 81.137978][ T22] __entry_tramp_text_end+0xdfc/0x9000 [ 81.138425][ T22] d_lookup+0x44/0x70 [ 81.138796][ T22] lookup_dcache+0x24/0x84 [ 81.139182][ T22] __lookup_hash+0x24/0xd0 [ 81.139573][ T22] kern_path_locked+0x90/0x10c [ 81.139974][ T22] handle_remove+0x38/0x284 [ 81.140366][ T22] devtmpfsd+0x8c/0xd0 [ 81.140735][ T22] kthread+0x150/0x15c [ 81.141409][ T22] ret_from_fork+0x10/0x20 [ 81.141911][ T22] [ 81.142257][ T22] Allocated by task 22: [ 81.142674][ T22] kasan_save_stack+0x28/0x60 [ 81.143192][ T22] __kasan_slab_alloc+0xb0/0x110 [ 81.143612][ T22] kmem_cache_alloc+0x1cc/0x340 [ 81.144013][ T22] getname_kernel+0x30/0x150 [ 81.144410][ T22] kern_path_locked+0x2c/0x10c [ 81.144810][ T22] handle_remove+0x38/0x284 [ 81.145195][ T22] devtmpfsd+0x8c/0xd0 [ 81.145569][ T22] kthread+0x150/0x15c [ 81.145932][ T22] ret_from_fork+0x10/0x20 [ 81.146361][ T22] [ 81.146638][ T22] Freed by task 22: [ 81.146971][ T22] kasan_save_stack+0x28/0x60 [ 81.147375][ T22] kasan_set_track+0x28/0x3c [ 81.147766][ T22] kasan_set_free_info+0x20/0x30 [ 81.148168][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 81.148659][ T22] __kasan_slab_free+0x10/0x1c [ 81.149058][ T22] slab_free_freelist_hook+0xc4/0x20c [ 81.149484][ T22] kmem_cache_free+0x9c/0x420 [ 81.149879][ T22] putname.part.0+0x68/0x7c [ 81.150281][ T22] kern_path_locked+0x64/0x10c [ 81.150682][ T22] handle_remove+0x38/0x284 [ 81.151465][ T22] devtmpfsd+0x8c/0xd0 [ 81.151837][ T22] kthread+0x150/0x15c [ 81.152208][ T22] ret_from_fork+0x10/0x20 [ 81.152607][ T22] [ 81.152859][ T22] The buggy address belongs to the object at ffff000002994100 [ 81.152859][ T22] which belongs to the cache names_cache of size 4096 [ 81.153687][ T22] The buggy address is located 32 bytes inside of [ 81.153687][ T22] 4096-byte region [ffff000002994100, ffff000002995100) [ 81.154505][ T22] The buggy address belongs to the page: [ 81.155019][ T22] page:000000000132e1c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf3ff000002996180 pfn:0x42990 [ 81.155874][ T22] head:000000000132e1c4 order:3 compound_mapcount:0 compound_pincount:0 [ 81.156456][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 81.157448][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f7ff000002837700 [ 81.158063][ T22] raw: f3ff000002996180 0000000080070001 00000001ffffffff 0000000000000000 [ 81.158678][ T22] page dumped because: kasan: bad access detected [ 81.159129][ T22] [ 81.159402][ T22] Memory state around the buggy address: [ 81.159929][ T22] ffff000002993f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 81.160506][ T22] ffff000002994000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 81.161146][ T22] >ffff000002994100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 81.161743][ T22] ^ [ 81.162163][ T22] ffff000002994200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 81.162720][ T22] ffff000002994300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 81.163282][ T22] ================================================================== [ 81.163801][ T22] Disabling lock debugging due to kernel taint [ 81.873066][ T26] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 81.991555][ T26] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 82.389729][ T26] bond0 (unregistering): Released all slaves executing program executing program executing program [ 91.702734][ T3325] can: request_module (can-proto-0) failed. [ 91.842110][ T3325] can: request_module (can-proto-0) failed. [ 91.915572][ T3325] can: request_module (can-proto-0) failed. executing program executing program [ 101.219738][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 101.226972][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 101.230450][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 101.236239][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 09:53:30 Registers: info registers vcpu 0 PC=ffff800011120d78 X00=ffff800011120d70 X01=ffff800011120db0 X02=ffff80006d9f1000 X03=ffff80001246de38 X04=ffff00007fbbe400 X05=0000000000000000 X06=000000000209f6c3 X07=000000000000000c X08=ffff80001220a708 X09=474244571b20e7c3 X10=fe88108e58819e5d X11=ffff800011ded7d8 X12=0000000000000001 X13=0000000000000001 X14=000000000000028d X15=0000000000004000 X16=ffff800010004000 X17=ffff80006d9f1000 X18=00000000fffffffd X19=ffff80001246c880 X20=0000000000003dc4 X21=00000012a05f2000 X22=00000012d30b3b00 X23=00000000000000c0 X24=0000000000000001 X25=0000000000000000 X26=ffff80001013df00 X27=ffff00007fbbdf00 X28=ffff00007fbbdec0 X29=ffff800010003e00 X30=e584800011120dc8 SP=ffff800010003e00 PSTATE=004000c9 ---- 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=0000000000000000:411227e000000000 Z02=aac425f6884b1ee9:9aeabb3fe72b33cf 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=0000000000000010:0000000e94cb3760 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000107805dc X00=ffff8000125b5000 X01=0000000000000002 X02=0000000000000000 X03=0000000000000018 X04=f7ff000002b8d880 X05=0000000000000031 X06=312e31382020205b X07=205b5d3933353133 X08=65646b203a6d6d6f X09=4e207366706d7476 X10=656c6c616b7a7973 X11=2d37343738302d72 X12=5b5d393335313331 X13=205d323254202020 X14=746e69617420746f X15=2e34312e35206465 X16=6c616b7a79732d30 X17=343738302d72656c X18=00000000fffffffd X19=ffff80001242994e X20=ffff8000107805b4 X21=f7ff000002b8d880 X22=ffff8000124299b2 X23=0000000000000f01 X24=000000000000006a X25=ffff8000121eff90 X26=0000000000000000 X27=ffff800012429948 X28=ffff80001221d030 X29=ffff80001267b500 X30=ffff8000107805dc SP=ffff80001267b500 PSTATE=804000c9 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=0000000000000000:411227e000000000 Z02=aac425f6884b1ee9:9aeabb3fe72b33cf 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=0000000000000010:0000000e94cb3760 Z31=0000000000000000:0000000000000000