syzkaller login: [ 57.865377][ T3173] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 57.871112][ T3173] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 59.821027][ T3173] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:53397' (ECDSA) to the list of known hosts. 1970/01/01 00:01:08 fuzzer started 1970/01/01 00:01:10 connecting to host at localhost:41225 1970/01/01 00:01:10 checking machine... 1970/01/01 00:01:10 checking revisions... 1970/01/01 00:01:11 testing simple program... executing program [ 75.398097][ T3336] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 75.430672][ T3336] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.829486][ T3336] device hsr_slave_0 entered promiscuous mode [ 76.886308][ T3336] device hsr_slave_1 entered promiscuous mode executing program [ 77.949776][ T3336] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 78.029627][ T3336] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 78.089797][ T3336] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 78.147298][ T3336] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 79.204852][ T3336] 8021q: adding VLAN 0 to HW filter on device bond0 [ 79.271175][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 79.279020][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 79.882203][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 79.892224][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 79.933419][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 79.942029][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 79.991077][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 80.049161][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 80.164076][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 80.169772][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 80.225301][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 80.230397][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 80.271356][ T3336] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 80.459092][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 80.460572][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 81.732221][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 81.737745][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 82.373027][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 82.379310][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 82.388398][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 82.393293][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 82.430559][ T3336] device veth0_vlan entered promiscuous mode [ 82.508185][ T3336] device veth1_vlan entered promiscuous mode [ 82.684706][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 82.689941][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 82.700083][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 82.707835][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 82.742670][ T3336] device veth0_macvtap entered promiscuous mode [ 82.792270][ T3336] device veth1_macvtap entered promiscuous mode [ 82.935564][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 82.940674][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 82.990501][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 82.997983][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 83.035669][ T3336] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 83.037119][ T3336] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 83.038013][ T3336] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 83.038889][ T3336] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 83.521669][ T3336] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 83.966121][ T331] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:01:23 building call list... [ 84.222883][ T331] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 84.365749][ T331] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 84.597321][ T331] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 86.922808][ T331] device hsr_slave_0 left promiscuous mode [ 86.980904][ T331] device hsr_slave_1 left promiscuous mode [ 87.086398][ T331] device veth1_macvtap left promiscuous mode [ 87.087508][ T331] device veth0_macvtap left promiscuous mode [ 87.088664][ T331] device veth1_vlan left promiscuous mode [ 87.089583][ T331] device veth0_vlan left promiscuous mode [ 87.829717][ T22] ================================================================== [ 87.830376][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xf000 [ 87.831398][ T22] Read at addr f7ff0000029c0020 by task kdevtmpfs/22 [ 87.831964][ T22] Pointer tag: [f7], memory tag: [fe] [ 87.832404][ T22] [ 87.832855][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-09826-ga2b28235335f #0 [ 87.834561][ T22] Hardware name: linux,dummy-virt (DT) [ 87.835508][ T22] Call trace: [ 87.835828][ T22] dump_backtrace+0x0/0x1ac [ 87.836262][ T22] show_stack+0x18/0x24 [ 87.836641][ T22] dump_stack_lvl+0x68/0x84 [ 87.837063][ T22] print_address_description+0x7c/0x2b4 [ 87.837503][ T22] kasan_report+0x134/0x380 [ 87.837900][ T22] __do_kernel_fault+0x128/0x1bc [ 87.838325][ T22] do_tag_check_fault+0x74/0x90 [ 87.838732][ T22] do_mem_abort+0x44/0xb4 [ 87.839121][ T22] el1_abort+0x40/0x60 [ 87.839500][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 87.839963][ T22] el1h_64_sync+0x78/0x7c [ 87.840653][ T22] __entry_tramp_text_end+0xdfc/0xf000 [ 87.841330][ T22] d_lookup+0x44/0x70 [ 87.841716][ T22] lookup_dcache+0x24/0x84 [ 87.842160][ T22] __lookup_hash+0x24/0xd0 [ 87.842545][ T22] kern_path_locked+0x90/0x10c [ 87.842944][ T22] handle_remove+0x38/0x284 [ 87.843342][ T22] devtmpfsd+0x8c/0xd0 [ 87.843998][ T22] kthread+0x150/0x15c [ 87.844652][ T22] ret_from_fork+0x10/0x20 [ 87.845522][ T22] [ 87.845859][ T22] Allocated by task 22: [ 87.846271][ T22] kasan_save_stack+0x28/0x60 [ 87.846778][ T22] __kasan_slab_alloc+0xb0/0x110 [ 87.847198][ T22] kmem_cache_alloc+0x1cc/0x340 [ 87.847625][ T22] getname_kernel+0x30/0x150 [ 87.848019][ T22] kern_path_locked+0x2c/0x10c [ 87.848415][ T22] handle_remove+0x38/0x284 [ 87.848821][ T22] devtmpfsd+0x8c/0xd0 [ 87.849237][ T22] kthread+0x150/0x15c [ 87.849711][ T22] ret_from_fork+0x10/0x20 [ 87.850535][ T22] [ 87.850888][ T22] Freed by task 22: [ 87.851528][ T22] kasan_save_stack+0x28/0x60 [ 87.852060][ T22] kasan_set_track+0x28/0x3c [ 87.852459][ T22] kasan_set_free_info+0x20/0x30 [ 87.852869][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 87.853331][ T22] __kasan_slab_free+0x10/0x1c [ 87.853859][ T22] slab_free_freelist_hook+0xc4/0x20c [ 87.854289][ T22] kmem_cache_free+0x9c/0x420 [ 87.854682][ T22] putname.part.0+0x68/0x7c [ 87.855069][ T22] kern_path_locked+0x64/0x10c [ 87.855491][ T22] handle_remove+0x38/0x284 [ 87.855880][ T22] devtmpfsd+0x8c/0xd0 [ 87.856278][ T22] kthread+0x150/0x15c [ 87.856706][ T22] ret_from_fork+0x10/0x20 [ 87.857203][ T22] [ 87.857453][ T22] The buggy address belongs to the object at ffff0000029c0000 [ 87.857453][ T22] which belongs to the cache names_cache of size 4096 [ 87.858479][ T22] The buggy address is located 32 bytes inside of [ 87.858479][ T22] 4096-byte region [ffff0000029c0000, ffff0000029c1000) [ 87.859803][ T22] The buggy address belongs to the page: [ 87.860545][ T22] page:0000000015e644e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf8ff0000029c4100 pfn:0x429c0 [ 87.861706][ T22] head:0000000015e644e7 order:3 compound_mapcount:0 compound_pincount:0 [ 87.862480][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 87.863804][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f4ff000002837700 [ 87.864543][ T22] raw: f8ff0000029c4100 0000000080070005 00000001ffffffff 0000000000000000 [ 87.865458][ T22] page dumped because: kasan: bad access detected [ 87.866034][ T22] [ 87.866360][ T22] Memory state around the buggy address: [ 87.867132][ T22] ffff0000029bfe00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 87.867959][ T22] ffff0000029bff00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 87.868700][ T22] >ffff0000029c0000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 87.869388][ T22] ^ [ 87.869916][ T22] ffff0000029c0100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 87.870549][ T22] ffff0000029c0200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 87.871306][ T22] ================================================================== [ 87.872051][ T22] Disabling lock debugging due to kernel taint [ 88.651148][ T331] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 88.771358][ T331] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 89.182631][ T331] bond0 (unregistering): Released all slaves executing program executing program executing program [ 98.070832][ T3324] can: request_module (can-proto-0) failed. [ 98.187451][ T3324] can: request_module (can-proto-0) failed. executing program [ 98.280219][ T3324] can: request_module (can-proto-0) failed. executing program executing program [ 104.869023][ T3173] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 107.881246][ T3173] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 107.889490][ T3173] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 107.893182][ T3173] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 21:05:28 Registers: info registers vcpu 0 PC=ffff800011780900 X00=ffff800012203c10 X01=00000000000000c0 X02=0000000000007397 X03=0000000000000000 X04=00000000000043e8 X05=00ffffffffffffff X06=00000001490801cf X07=000000000000000c X08=ffff80001222a738 X09=ef710c68a7af928d X10=1cdf459974990f9d X11=ffff800011e0f308 X12=0000000000000001 X13=0000000000000001 X14=0000000000000188 X15=0000b2cac0447022 X16=0000000000000000 X17=0000000000000000 X18=00000000fffffffd X19=ffff800012203c10 X20=ffff800010602ee0 X21=ffff800012203d60 X22=ffff800011781a1c X23=0000000060400009 X24=0000000000000000 X25=0000000000000000 X26=ffff800012229880 X27=0000000000000000 X28=ffff800012229880 X29=ffff800012203be0 X30=66c1800011781548 SP=ffff800012203be0 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=0000000000000000:412a7e0000000000 Z02=83f878efa2f5663c:aa65f4452e7491ed 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=0000000000000010:0000000ff18c3ab0 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff80001077ed54 X00=f7ff000002bea880 X01=0000000000000002 X02=ffff8000125d5018 X03=0000000000000018 X04=f7ff000002bea880 X05=0000000000000028 X06=382e37382020205b X07=205b5d3136353433 X08=6d75642c78756e69 X09=20747269762d796d X10=6d616e2065726177 X11=78756e696c203a65 X12=5b5d313635343338 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6c616b7a79732d30 X17=323839302d72656c X18=00000000fffffffd X19=ffff80001244a980 X20=ffff80001077ed54 X21=f7ff000002bea880 X22=ffff80001244a984 X23=0000000000000f01 X24=000000000000003c X25=ffff80001220ff90 X26=0000000000000000 X27=ffff80001244a948 X28=ffff80001223d070 X29=ffff80001269b500 X30=929180001077ed7c SP=ffff80001269b500 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=0000000000000000:3fe0e997b40ddb97 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:3ff0000000000000 Z04=0000000000000000:3ff0000000000000 Z05=0000000000000000:3fd3333333333333 Z06=0000000000000000:0000004000001010 Z07=0000000000000000:c3c6001bf3bcf88b Z08=0000000000000000:3fb6a34c212572d8 Z09=0000000000000000:3fe317c5b2b7e182 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=0000000000000000:00000000322b9c65 Z31=0000000000000000:0000000000000000