syzkaller login: [ 107.142254][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 107.152155][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 107.164695][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:13673' (ECDSA) to the list of known hosts. 1970/01/01 00:02:07 fuzzer started 1970/01/01 00:02:10 connecting to host at localhost:46821 1970/01/01 00:02:10 checking machine... 1970/01/01 00:02:10 checking revisions... 1970/01/01 00:02:11 testing simple program... executing program executing program [ 139.263409][ T3328] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 139.332699][ T3328] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 141.564695][ T3328] device hsr_slave_0 entered promiscuous mode [ 141.623200][ T3328] device hsr_slave_1 entered promiscuous mode [ 143.536094][ T3328] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 143.637938][ T3328] netdevsim netdevsim0 netdevsim1: renamed from eth1 executing program [ 143.749707][ T3328] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 143.841544][ T3328] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 145.856976][ T3328] 8021q: adding VLAN 0 to HW filter on device bond0 [ 146.035326][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 146.045585][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 147.134474][ T3507] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 147.144478][ T3507] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 147.225775][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 147.235686][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 147.315835][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 147.400899][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 147.613532][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 147.633016][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 147.705043][ T3645] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 147.714899][ T3645] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 147.778416][ T3328] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 148.054500][ T3645] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 148.061129][ T3645] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 150.194400][ T3645] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 150.214264][ T3645] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 151.310584][ T3645] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 151.319403][ T3645] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 151.356535][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 151.366547][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 151.403920][ T3328] device veth0_vlan entered promiscuous mode [ 151.506232][ T3328] device veth1_vlan entered promiscuous mode [ 151.773001][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 151.784375][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 151.842629][ T3328] device veth0_macvtap entered promiscuous mode [ 151.898999][ T3328] device veth1_macvtap entered promiscuous mode [ 152.106439][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 152.116311][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 152.136439][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 152.152910][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 152.224933][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 152.235267][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 152.331908][ T3328] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 152.333643][ T3328] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 152.334832][ T3328] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 152.336023][ T3328] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 153.101797][ T3328] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 153.941694][ T10] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 154.128340][ T10] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:32 building call list... [ 154.280707][ T10] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 154.445806][ T10] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 157.456194][ T10] device hsr_slave_0 left promiscuous mode [ 157.502453][ T10] device hsr_slave_1 left promiscuous mode [ 157.659319][ T10] device veth1_macvtap left promiscuous mode [ 157.662624][ T10] device veth0_macvtap left promiscuous mode [ 157.679140][ T10] device veth1_vlan left promiscuous mode [ 157.680431][ T10] device veth0_vlan left promiscuous mode executing program [ 159.161428][ T22] ================================================================== [ 159.162465][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xa000 [ 159.164058][ T22] Read at addr f9ff0000029d5160 by task kdevtmpfs/22 [ 159.165750][ T22] Pointer tag: [f9], memory tag: [fe] [ 159.168972][ T22] [ 159.170227][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-07511-g7c636d4d20f8 #0 [ 159.171381][ T22] Hardware name: linux,dummy-virt (DT) [ 159.172299][ T22] Call trace: [ 159.172802][ T22] dump_backtrace+0x0/0x1ac [ 159.173537][ T22] show_stack+0x18/0x24 [ 159.174165][ T22] dump_stack_lvl+0x68/0x84 [ 159.174846][ T22] print_address_description+0x7c/0x2b4 [ 159.175575][ T22] kasan_report+0x134/0x380 [ 159.176231][ T22] __do_kernel_fault+0x128/0x1bc [ 159.176900][ T22] do_tag_check_fault+0x74/0x90 [ 159.177615][ T22] do_mem_abort+0x44/0xb4 [ 159.178385][ T22] el1_abort+0x40/0x60 [ 159.179043][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 159.179734][ T22] el1h_64_sync+0x78/0x7c [ 159.180376][ T22] __entry_tramp_text_end+0xdfc/0xa000 [ 159.181085][ T22] d_lookup+0x44/0x70 [ 159.181708][ T22] lookup_dcache+0x24/0x84 [ 159.182353][ T22] __lookup_hash+0x24/0xd0 [ 159.183019][ T22] kern_path_locked+0x90/0x10c [ 159.183695][ T22] handle_remove+0x38/0x284 [ 159.184352][ T22] devtmpfsd+0x8c/0xd0 [ 159.184963][ T22] kthread+0x150/0x15c [ 159.185591][ T22] ret_from_fork+0x10/0x20 [ 159.186424][ T22] [ 159.186968][ T22] Allocated by task 22: [ 159.187855][ T22] kasan_save_stack+0x28/0x60 [ 159.188709][ T22] __kasan_slab_alloc+0xb0/0x110 [ 159.189391][ T22] kmem_cache_alloc+0x1cc/0x340 [ 159.190056][ T22] getname_kernel+0x30/0x150 [ 159.190734][ T22] kern_path_locked+0x2c/0x10c [ 159.191412][ T22] handle_remove+0x38/0x284 [ 159.192056][ T22] devtmpfsd+0x8c/0xd0 [ 159.192705][ T22] kthread+0x150/0x15c [ 159.193356][ T22] ret_from_fork+0x10/0x20 [ 159.194056][ T22] [ 159.194522][ T22] Freed by task 22: [ 159.196217][ T22] kasan_save_stack+0x28/0x60 [ 159.198087][ T22] kasan_set_track+0x28/0x3c [ 159.200160][ T22] kasan_set_free_info+0x20/0x30 [ 159.202090][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 159.204431][ T22] __kasan_slab_free+0x10/0x1c [ 159.206287][ T22] slab_free_freelist_hook+0xc4/0x20c [ 159.208378][ T22] kmem_cache_free+0x9c/0x420 [ 159.210504][ T22] putname.part.0+0x68/0x7c [ 159.211759][ T22] kern_path_locked+0x64/0x10c [ 159.212622][ T22] handle_remove+0x38/0x284 [ 159.213502][ T22] devtmpfsd+0x8c/0xd0 [ 159.214321][ T22] kthread+0x150/0x15c [ 159.215191][ T22] ret_from_fork+0x10/0x20 [ 159.216058][ T22] [ 159.216613][ T22] The buggy address belongs to the object at ffff0000029d5140 [ 159.216613][ T22] which belongs to the cache names_cache of size 4096 [ 159.218992][ T22] The buggy address is located 32 bytes inside of [ 159.218992][ T22] 4096-byte region [ffff0000029d5140, ffff0000029d6140) [ 159.220874][ T22] The buggy address belongs to the page: [ 159.222228][ T22] page:000000000f2ab1a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0xfdff0000029d6180 pfn:0x429d0 [ 159.224114][ T22] head:000000000f2ab1a5 order:3 compound_mapcount:0 compound_pincount:0 [ 159.225454][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 159.227556][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 faff000002837700 [ 159.229035][ T22] raw: fdff0000029d6180 0000000080070001 00000001ffffffff 0000000000000000 [ 159.230410][ T22] page dumped because: kasan: bad access detected [ 159.231516][ T22] [ 159.232076][ T22] Memory state around the buggy address: [ 159.233280][ T22] ffff0000029d4f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.234588][ T22] ffff0000029d5000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.235829][ T22] >ffff0000029d5100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.237078][ T22] ^ [ 159.238432][ T22] ffff0000029d5200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.239676][ T22] ffff0000029d5300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.240942][ T22] ================================================================== [ 159.242141][ T22] Disabling lock debugging due to kernel taint [ 160.683360][ T10] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 160.844762][ T10] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 161.652174][ T10] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 178.709947][ T3323] can: request_module (can-proto-0) failed. [ 178.905657][ T3323] can: request_module (can-proto-0) failed. [ 179.049518][ T3323] can: request_module (can-proto-0) failed. executing program executing program executing program [ 187.508342][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 187.528602][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 187.544907][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 187.555614][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 23:32:47 Registers: info registers vcpu 0 PC=ffff8000102f2fb8 X00=f3ff00000515e090 X01=00000000000000c9 X02=000000000000000d X03=ffff800011df0000 X04=ffff800010000000 X05=0000000000000080 X06=ffff800011c065fd X07=ffff800011c065f7 X08=ffff800011dd8500 X09=ffff800011dd8878 X10=0000000000000000 X11=0000000000000000 X12=0000000000000000 X13=0000000000000000 X14=0000000000000000 X15=0000000000000000 X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=f3ff00000515e090 X20=f3ff000005a41a00 X21=ffff800012c8bd28 X22=ffff800012c8bd00 X23=00000000ffffffd0 X24=0000000000001000 X25=f3ff00000515e0c8 X26=000000007ffff000 X27=ffff800011df0878 X28=f1ff000006000000 X29=ffff800012c8bb10 X30=ffff8000105fe32c SP=ffff800012c8bb10 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=0000000000000000:3fd6ab7835d47a8e Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:3fde666666666666 Z04=0000000000000000:3ff25204cf0b9cee Z05=0000000000000000:3fe570d66ae406a9 Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3fd2de53de510dee Z09=0000000000000000:3fe5fd4cefa9a8f6 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=0000000000000008:00000000343326ed Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff80001078086c X00=ffff8000125d5000 X01=0000000000000002 X02=0000000000000000 X03=0000000000000018 X04=f7ff000002b58880 X05=000000000000005b X06=312e39353120205b X07=205b5d3035373536 X08=726f6d656d202c5d X09=5b203a6761742079 X10=676174207265746e X11=202c5d39665b203a X12=5b5d303537353631 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306178302f6366 X18=00000000fffffffd X19=ffff80001244896d X20=ffff800010780844 X21=f7ff000002b58880 X22=ffff800012448983 X23=0000000000000f01 X24=000000000000003b X25=ffff80001220ff90 X26=ffff80001235e718 X27=ffff800012448948 X28=ffff800012448798 X29=ffff80001269b590 X30=ffff80001078086c SP=ffff80001269b590 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=0000000000000000:3fd5709dc1715d47 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:3ff0000000000000 Z04=0000000000000000:3ff0000000000000 Z05=0000000000000000:3fd3333333333333 Z06=0000000000000000:0000040000000000 Z07=0000000000000000:3fef991d1c68a1ce Z08=0000000000000000:3fc1f4d63775944c Z09=0000000000000000:3fe2ef60dd497fce 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=0000000000000000:000000000fb30b7d Z31=0000000000000000:0000000000000000