syzkaller login: [ 54.286228][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 55.708553][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 57.777645][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:45243' (ECDSA) to the list of known hosts. 1970/01/01 00:01:02 fuzzer started 1970/01/01 00:01:04 connecting to host at localhost:44439 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 [ 68.852694][ T3326] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 68.879893][ T3326] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 70.268007][ T3326] device hsr_slave_0 entered promiscuous mode [ 70.317649][ T3326] device hsr_slave_1 entered promiscuous mode executing program [ 71.398351][ T3326] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 71.458093][ T3326] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 71.517679][ T3326] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 71.612784][ T3326] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 72.697205][ T3326] 8021q: adding VLAN 0 to HW filter on device bond0 [ 72.765151][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 72.770027][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 73.298220][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 73.302972][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 73.338709][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 73.343412][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 73.378549][ T3637] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 73.422284][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 73.529788][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 73.538073][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 73.571154][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 73.578927][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 73.609714][ T3326] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 73.725334][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 73.726745][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 74.880065][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 74.890886][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 75.499123][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 75.511238][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 75.541257][ T3637] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 75.548711][ T3637] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 75.556909][ T3326] device veth0_vlan entered promiscuous mode [ 75.630891][ T3326] device veth1_vlan entered promiscuous mode [ 75.807403][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 75.812308][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 75.820946][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 75.827649][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 75.866038][ T3326] device veth0_macvtap entered promiscuous mode [ 75.884598][ T2931] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 75.915171][ T3326] device veth1_macvtap entered promiscuous mode [ 76.049867][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 76.058286][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 76.106925][ T3637] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 76.119917][ T3637] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 76.159940][ T3326] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.160873][ T3326] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.161574][ T3326] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.162250][ T3326] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.562179][ T3326] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation executing program [ 76.978254][ T10] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:01:16 building call list... [ 77.138112][ T10] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.272121][ T10] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.462388][ T10] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 79.730775][ T10] device hsr_slave_0 left promiscuous mode [ 79.778452][ T10] device hsr_slave_1 left promiscuous mode executing program [ 79.870109][ T10] device veth1_macvtap left promiscuous mode [ 79.870866][ T10] device veth0_macvtap left promiscuous mode [ 79.872157][ T10] device veth1_vlan left promiscuous mode [ 79.873361][ T10] device veth0_vlan left promiscuous mode [ 80.541639][ T22] ================================================================== [ 80.543085][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x8000 [ 80.545233][ T22] Read at addr f2ff000002984120 by task kdevtmpfs/22 [ 80.545806][ T22] Pointer tag: [f2], memory tag: [fe] [ 80.546191][ T22] [ 80.547250][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-08100-g7ba88a2a09f4 #0 [ 80.548763][ T22] Hardware name: linux,dummy-virt (DT) [ 80.549361][ T22] Call trace: [ 80.549667][ T22] dump_backtrace+0x0/0x1ac [ 80.550113][ T22] show_stack+0x18/0x24 [ 80.550502][ T22] dump_stack_lvl+0x68/0x84 [ 80.550921][ T22] print_address_description+0x7c/0x2b4 [ 80.551367][ T22] kasan_report+0x134/0x380 [ 80.551760][ T22] __do_kernel_fault+0x128/0x1bc [ 80.552174][ T22] do_tag_check_fault+0x74/0x90 [ 80.552591][ T22] do_mem_abort+0x44/0xb4 [ 80.552981][ T22] el1_abort+0x40/0x60 [ 80.553363][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 80.553920][ T22] el1h_64_sync+0x78/0x7c [ 80.554638][ T22] __entry_tramp_text_end+0xdfc/0x8000 [ 80.555306][ T22] d_lookup+0x44/0x70 [ 80.555718][ T22] lookup_dcache+0x24/0x84 [ 80.556130][ T22] __lookup_hash+0x24/0xd0 [ 80.556549][ T22] kern_path_locked+0x90/0x10c [ 80.557166][ T22] handle_remove+0x38/0x284 [ 80.557856][ T22] devtmpfsd+0x8c/0xd0 [ 80.559224][ T22] kthread+0x150/0x15c [ 80.560343][ T22] ret_from_fork+0x10/0x20 [ 80.561685][ T22] [ 80.562475][ T22] Allocated by task 22: [ 80.563112][ T22] kasan_save_stack+0x28/0x60 [ 80.563837][ T22] __kasan_slab_alloc+0xb0/0x110 [ 80.564460][ T22] kmem_cache_alloc+0x1cc/0x340 [ 80.564973][ T22] getname_kernel+0x30/0x150 [ 80.565556][ T22] kern_path_locked+0x2c/0x10c [ 80.566149][ T22] handle_remove+0x38/0x284 [ 80.566704][ T22] devtmpfsd+0x8c/0xd0 [ 80.567273][ T22] kthread+0x150/0x15c [ 80.567827][ T22] ret_from_fork+0x10/0x20 [ 80.568338][ T22] [ 80.568813][ T22] Freed by task 22: [ 80.569165][ T22] kasan_save_stack+0x28/0x60 [ 80.570010][ T22] kasan_set_track+0x28/0x3c [ 80.570828][ T22] kasan_set_free_info+0x20/0x30 [ 80.571516][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 80.572314][ T22] __kasan_slab_free+0x10/0x1c [ 80.572996][ T22] slab_free_freelist_hook+0xc4/0x20c [ 80.573745][ T22] kmem_cache_free+0x9c/0x420 [ 80.574262][ T22] putname.part.0+0x68/0x7c [ 80.574846][ T22] kern_path_locked+0x64/0x10c [ 80.575535][ T22] handle_remove+0x38/0x284 [ 80.576063][ T22] devtmpfsd+0x8c/0xd0 [ 80.576736][ T22] kthread+0x150/0x15c [ 80.577495][ T22] ret_from_fork+0x10/0x20 [ 80.579078][ T22] [ 80.579985][ T22] The buggy address belongs to the object at ffff000002984100 [ 80.579985][ T22] which belongs to the cache names_cache of size 4096 [ 80.581984][ T22] The buggy address is located 32 bytes inside of [ 80.581984][ T22] 4096-byte region [ffff000002984100, ffff000002985100) [ 80.583278][ T22] The buggy address belongs to the page: [ 80.584152][ T22] page:00000000f6a27552 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42980 [ 80.585342][ T22] head:00000000f6a27552 order:3 compound_mapcount:0 compound_pincount:0 [ 80.586234][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 80.587777][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 fdff000002837700 [ 80.588728][ T22] raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000 [ 80.589695][ T22] page dumped because: kasan: bad access detected [ 80.590657][ T22] [ 80.590967][ T22] Memory state around the buggy address: [ 80.591770][ T22] ffff000002983f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 80.592749][ T22] ffff000002984000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 80.593726][ T22] >ffff000002984100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 80.594627][ T22] ^ [ 80.595291][ T22] ffff000002984200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 80.596184][ T22] ffff000002984300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 80.597099][ T22] ================================================================== [ 80.598558][ T22] Disabling lock debugging due to kernel taint [ 81.361664][ T10] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 81.453556][ T10] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 81.838808][ T10] bond0 (unregistering): Released all slaves executing program executing program executing program [ 90.486479][ T3315] can: request_module (can-proto-0) failed. [ 90.602956][ T3315] can: request_module (can-proto-0) failed. [ 90.679036][ T3315] can: request_module (can-proto-0) failed. executing program executing program [ 97.147794][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 99.996395][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 100.002116][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 100.006324][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 21:52:05 Registers: info registers vcpu 0 PC=ffff800010105ef0 X00=00000000000000c0 X01=00000000ffffe30a X02=80000000ffffe30a X03=ffff8000122d1a50 X04=00000000ffffe30a X05=ffff80001267b640 X06=00000000ffffe30a X07=43203232203a4449 X08=65646b203a6d6d6f X09=4e207366706d7476 X10=656c6c616b7a7973 X11=2d30303138302d72 X12=3261383861623767 X13=3023203466393061 X14=746e69617420746f X15=2e34312e35206465 X16=6c616b7a79732d30 X17=303138302d72656c X18=00000000fffffffd X19=ffff00007fbbb9e1 X20=0000000000000000 X21=0000000000000052 X22=0000000000000000 X23=ffff800011e32580 X24=00000000000000c0 X25=0000000000000056 X26=0000000000000016 X27=ffff80001267b640 X28=0000000000000000 X29=ffff80001267b570 X30=63ab800010106a94 SP=ffff80001267b570 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=0000000000000000:3fd64a86c4dcaa01 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:3fde666666666666 Z04=0000000000000000:3feb38db24a6f202 Z05=0000000000000000:3fd80b4fe2e77d9e Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3fa26a4bf4210fd0 Z09=0000000000000000:3fe4bb4286e6e0dc 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=0000000000000000:00000000baed201e Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000105fa890 X00=f7ff0000067c803e X01=000000000000000a X02=ffff800011df49ea X03=0000000000000000 X04=ffff800011df49ea X05=0000000000000001 X06=000000000000000a X07=000000000000000e X08=000000000000000a X09=ffff800011ddcae0 X10=000000000000000a X11=0000000000000000 X12=f7ff0000067c802a X13=f7ff0000067c9000 X14=0000000000000000 X15=0000000000000030 X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=f4ff000003057e00 X20=000000000000b8fc X21=ffff80001285bd28 X22=ffff80001285bd00 X23=0000000000000000 X24=f5ff0000051ef028 X25=f5ff0000051ef038 X26=000000000000b8fb X27=ffff8000117d25b0 X28=0000000000000000 X29=ffff80001285bc50 X30=76db80001014def0 SP=ffff80001285bb90 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=0000000000000000:3fd64a86c4dcaa01 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:3fde666666666666 Z04=0000000000000000:3feb38db24a6f202 Z05=0000000000000000:3fd80b4fe2e77d9e Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3fa26a4bf4210fd0 Z09=0000000000000000:3fe4bb4286e6e0dc 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=0000000000000000:00000000baed201e Z31=0000000000000000:0000000000000000