syzkaller login: [ 61.156466][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 61.171427][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 61.174997][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:49400' (ECDSA) to the list of known hosts. 1970/01/01 00:01:08 fuzzer started 1970/01/01 00:01:09 connecting to host at localhost:38273 1970/01/01 00:01:10 checking machine... 1970/01/01 00:01:10 checking revisions... 1970/01/01 00:01:10 testing simple program... executing program [ 74.986777][ T3329] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 75.010099][ T3329] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 76.689768][ T3329] device hsr_slave_0 entered promiscuous mode [ 76.744865][ T3329] device hsr_slave_1 entered promiscuous mode [ 78.089947][ T3329] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 78.156230][ T3329] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 78.216715][ T3329] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 78.296112][ T3329] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 79.492815][ T3329] 8021q: adding VLAN 0 to HW filter on device bond0 [ 79.571248][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 79.577246][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 80.126611][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 80.139388][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 80.193806][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 80.206485][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 80.243721][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 80.296545][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 80.442731][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 80.456851][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 80.499333][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 80.507625][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 80.554561][ T3329] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 80.716900][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 80.718273][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 81.985863][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 82.010155][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 82.620235][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 82.626216][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 82.652204][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 82.657991][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 82.675617][ T3329] device veth0_vlan entered promiscuous mode [ 82.745737][ T3329] device veth1_vlan entered promiscuous mode [ 82.926373][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 82.934532][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 82.939759][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 82.946278][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 82.976626][ T3329] device veth0_macvtap entered promiscuous mode [ 82.996656][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 83.026430][ T3329] device veth1_macvtap entered promiscuous mode [ 83.157138][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 83.165774][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 83.207221][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 83.216202][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 83.255314][ T3329] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 83.256244][ T3329] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 83.256905][ T3329] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 83.257552][ T3329] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 83.689846][ T3329] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 84.159081][ T29] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:01:23 building call list... [ 84.333603][ T29] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 84.462480][ T29] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 84.683011][ T29] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 87.100155][ T29] device hsr_slave_0 left promiscuous mode [ 87.153103][ T29] device hsr_slave_1 left promiscuous mode [ 87.258835][ T29] device veth1_macvtap left promiscuous mode [ 87.259738][ T29] device veth0_macvtap left promiscuous mode [ 87.267900][ T29] device veth1_vlan left promiscuous mode [ 87.268810][ T29] device veth0_vlan left promiscuous mode [ 88.007577][ T22] ================================================================== [ 88.008220][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x9000 [ 88.009200][ T22] Read at addr f1ff000002985160 by task kdevtmpfs/22 [ 88.009796][ T22] Pointer tag: [f1], memory tag: [fe] [ 88.010341][ T22] [ 88.012074][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-07693-g4ac6d90867a4 #0 [ 88.012935][ T22] Hardware name: linux,dummy-virt (DT) [ 88.013547][ T22] Call trace: [ 88.013887][ T22] dump_backtrace+0x0/0x1ac [ 88.014334][ T22] show_stack+0x18/0x24 [ 88.014745][ T22] dump_stack_lvl+0x68/0x84 [ 88.015148][ T22] print_address_description+0x7c/0x2b4 [ 88.015584][ T22] kasan_report+0x134/0x380 [ 88.015982][ T22] __do_kernel_fault+0x128/0x1bc [ 88.016405][ T22] do_tag_check_fault+0x74/0x90 [ 88.016825][ T22] do_mem_abort+0x44/0xb4 [ 88.017218][ T22] el1_abort+0x40/0x60 [ 88.017635][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 88.018067][ T22] el1h_64_sync+0x78/0x7c [ 88.018458][ T22] __entry_tramp_text_end+0xdfc/0x9000 [ 88.018913][ T22] d_lookup+0x44/0x70 [ 88.019291][ T22] lookup_dcache+0x24/0x84 [ 88.019718][ T22] __lookup_hash+0x24/0xd0 [ 88.020116][ T22] kern_path_locked+0x90/0x10c [ 88.020611][ T22] handle_remove+0x38/0x284 [ 88.021160][ T22] devtmpfsd+0x8c/0xd0 [ 88.021569][ T22] kthread+0x150/0x15c [ 88.022007][ T22] ret_from_fork+0x10/0x20 [ 88.022606][ T22] [ 88.022945][ T22] Allocated by task 22: [ 88.023371][ T22] kasan_save_stack+0x28/0x60 [ 88.023892][ T22] __kasan_slab_alloc+0xb0/0x110 [ 88.024308][ T22] kmem_cache_alloc+0x1cc/0x340 [ 88.024722][ T22] getname_kernel+0x30/0x150 [ 88.025119][ T22] kern_path_locked+0x2c/0x10c [ 88.025617][ T22] handle_remove+0x38/0x284 [ 88.026091][ T22] devtmpfsd+0x8c/0xd0 [ 88.026512][ T22] kthread+0x150/0x15c [ 88.026928][ T22] ret_from_fork+0x10/0x20 [ 88.027452][ T22] [ 88.027756][ T22] Freed by task 22: [ 88.028187][ T22] kasan_save_stack+0x28/0x60 [ 88.028900][ T22] kasan_set_track+0x28/0x3c [ 88.029470][ T22] kasan_set_free_info+0x20/0x30 [ 88.030047][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 88.030585][ T22] __kasan_slab_free+0x10/0x1c [ 88.031150][ T22] slab_free_freelist_hook+0xc4/0x20c [ 88.031795][ T22] kmem_cache_free+0x9c/0x420 [ 88.032298][ T22] putname.part.0+0x68/0x7c [ 88.032820][ T22] kern_path_locked+0x64/0x10c [ 88.033405][ T22] handle_remove+0x38/0x284 [ 88.033980][ T22] devtmpfsd+0x8c/0xd0 [ 88.034517][ T22] kthread+0x150/0x15c [ 88.035050][ T22] ret_from_fork+0x10/0x20 [ 88.035568][ T22] [ 88.035961][ T22] The buggy address belongs to the object at ffff000002985140 [ 88.035961][ T22] which belongs to the cache names_cache of size 4096 [ 88.037405][ T22] The buggy address is located 32 bytes inside of [ 88.037405][ T22] 4096-byte region [ffff000002985140, ffff000002986140) [ 88.038661][ T22] The buggy address belongs to the page: [ 88.039504][ T22] page:00000000c8dcbfa1 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf2ff000002984100 pfn:0x42980 [ 88.041212][ T22] head:00000000c8dcbfa1 order:3 compound_mapcount:0 compound_pincount:0 [ 88.042330][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 88.043790][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f3ff000002837700 [ 88.044954][ T22] raw: f2ff000002984100 0000000080070004 00000001ffffffff 0000000000000000 [ 88.045968][ T22] page dumped because: kasan: bad access detected [ 88.046815][ T22] [ 88.047206][ T22] Memory state around the buggy address: [ 88.048146][ T22] ffff000002984f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 88.049064][ T22] ffff000002985000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 88.049946][ T22] >ffff000002985100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 88.050768][ T22] ^ [ 88.051612][ T22] ffff000002985200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 88.052678][ T22] ffff000002985300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 88.053918][ T22] ================================================================== [ 88.054808][ T22] Disabling lock debugging due to kernel taint executing program [ 88.784788][ T29] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 88.891570][ T29] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 89.222698][ T29] bond0 (unregistering): Released all slaves executing program executing program executing program [ 99.964416][ T3320] can: request_module (can-proto-0) failed. [ 100.095660][ T3320] can: request_module (can-proto-0) failed. [ 100.175715][ T3320] can: request_module (can-proto-0) failed. executing program executing program executing program [ 108.989043][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 108.993746][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 108.997433][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 109.005311][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 09:49:36 Registers: info registers vcpu 0 PC=ffff80001077dd04 X00=faff000002b86880 X01=0000000000000002 X02=ffff8000125b5018 X03=0000000000000018 X04=faff000002b86880 X05=0000000000000020 X06=302e38382020205b X07=205b5d3134333031 X08=000000000000005d X09=ffff80001267b520 X10=000000000000005d X11=ffff8000122d1a10 X12=5b5d313433303130 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303978302f6366 X18=00000000fffffffd X19=ffff80001242894a X20=ffff80001077dd04 X21=faff000002b86880 X22=ffff800012428960 X23=0000000000000f01 X24=0000000000000018 X25=ffff8000121eff90 X26=0000000000000000 X27=ffff800012428948 X28=ffff80001221d008 X29=ffff80001267b5d0 X30=399080001077dd2c SP=ffff80001267b5d0 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=0000000000000000:0000000000000002 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:4113788000000000 Z04=0000000000000000:3ff0000000000000 Z05=0000000000000000:3fd3333333333333 Z06=0000000000000000:0000004000001010 Z07=0000000000000000:3ff30edd08e8484e Z08=0000000000000000:3fc1d2d0ee043a24 Z09=0000000000000000:3fe216cae1e2a960 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=0000000000000000:00000000909d7fff Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff80001111e858 X00=ffff80001111e850 X01=ffff80001111e890 X02=ffff80006da06000 X03=ffff80001283b7f0 X04=ffff00007fbd3400 X05=0000000000000000 X06=00000000021b02a7 X07=000000000000000c X08=f8ff0000028ef988 X09=79aae808983864de X10=ed11407a4a8a1705 X11=ffff800011de93b8 X12=0000000000000000 X13=0000000000000001 X14=00000000000001e8 X15=0000000000004000 X16=ffff80001000c000 X17=ffff80006da06000 X18=0000000000000000 X19=ffff80001246b880 X20=00000000000042d6 X21=00000014419aa600 X22=0000001468ff5cd0 X23=00000000000000c0 X24=0000000000000001 X25=0000000000000000 X26=ffff80001013e130 X27=ffff00007fbd2f00 X28=ffff00007fbd2ec0 X29=ffff80001000be00 X30=d5ab80001111e8a8 SP=ffff80001000be00 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=0000000000000000:0000000000000004 Z01=0000000000000000:c1162e42fefa39ef Z02=bfd0155313844a26:a87f25348b3202de 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=0000000000000010:0000000fc2c3caf0 Z31=0000000000000000:0000000000000000