syzkaller login: [ 96.994452][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 97.018144][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 97.030935][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:12167' (ECDSA) to the list of known hosts. 1970/01/01 00:01:51 fuzzer started 1970/01/01 00:01:54 connecting to host at localhost:41505 1970/01/01 00:01:54 checking machine... 1970/01/01 00:01:54 checking revisions... 1970/01/01 00:01:55 testing simple program... executing program executing program [ 122.678469][ T3330] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 122.725411][ T3330] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 125.152134][ T3330] device hsr_slave_0 entered promiscuous mode [ 125.221011][ T3330] device hsr_slave_1 entered promiscuous mode executing program [ 128.027273][ T3330] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 128.152278][ T3330] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 128.258835][ T3330] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 128.339073][ T3330] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 130.314978][ T3330] 8021q: adding VLAN 0 to HW filter on device bond0 [ 130.475854][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 130.485664][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 131.474465][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 131.493513][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 131.586408][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 131.611294][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 131.676586][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 131.757661][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 131.977719][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 131.988306][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 132.064750][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 132.086252][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 132.152528][ T3330] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 132.418374][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 132.423142][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 134.456421][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 134.479745][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 135.683046][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 135.708420][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 135.744670][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 135.759253][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 135.798753][ T3330] device veth0_vlan entered promiscuous mode [ 135.966625][ T3330] device veth1_vlan entered promiscuous mode [ 136.315251][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 136.335751][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 136.395316][ T3330] device veth0_macvtap entered promiscuous mode [ 136.486537][ T3330] device veth1_macvtap entered promiscuous mode executing program [ 136.697491][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 136.709744][ T2131] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 136.829683][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 136.851579][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 136.979507][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 136.999049][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 137.063682][ T3330] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 137.065180][ T3330] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 137.066397][ T3330] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 137.067579][ T3330] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 137.866699][ T3330] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation 1970/01/01 00:02:17 building call list... [ 138.775307][ T300] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 138.982730][ T300] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 139.145759][ T300] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 139.336012][ T300] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 142.093690][ T300] device hsr_slave_0 left promiscuous mode [ 142.144831][ T300] device hsr_slave_1 left promiscuous mode [ 142.276794][ T300] device veth1_macvtap left promiscuous mode [ 142.277852][ T300] device veth0_macvtap left promiscuous mode [ 142.293346][ T300] device veth1_vlan left promiscuous mode [ 142.294697][ T300] device veth0_vlan left promiscuous mode executing program [ 143.779057][ T22] ================================================================== [ 143.780468][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x9000 [ 143.782330][ T22] Read at addr fdff0000029d4120 by task kdevtmpfs/22 [ 143.783348][ T22] Pointer tag: [fd], memory tag: [fe] [ 143.784534][ T22] [ 143.786544][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-07693-g4ac6d90867a4 #0 [ 143.787787][ T22] Hardware name: linux,dummy-virt (DT) [ 143.788877][ T22] Call trace: [ 143.789444][ T22] dump_backtrace+0x0/0x1ac [ 143.790401][ T22] show_stack+0x18/0x24 [ 143.791209][ T22] dump_stack_lvl+0x68/0x84 [ 143.791983][ T22] print_address_description+0x7c/0x2b4 [ 143.792807][ T22] kasan_report+0x134/0x380 [ 143.793532][ T22] __do_kernel_fault+0x128/0x1bc [ 143.795519][ T22] do_tag_check_fault+0x74/0x90 [ 143.796315][ T22] do_mem_abort+0x44/0xb4 [ 143.797977][ T22] el1_abort+0x40/0x60 [ 143.799562][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 143.801946][ T22] el1h_64_sync+0x78/0x7c [ 143.803594][ T22] __entry_tramp_text_end+0xdfc/0x9000 [ 143.805651][ T22] d_lookup+0x44/0x70 [ 143.807178][ T22] lookup_dcache+0x24/0x84 [ 143.808041][ T22] __lookup_hash+0x24/0xd0 [ 143.808919][ T22] kern_path_locked+0x90/0x10c [ 143.809765][ T22] handle_remove+0x38/0x284 [ 143.810627][ T22] devtmpfsd+0x8c/0xd0 [ 143.811357][ T22] kthread+0x150/0x15c [ 143.811820][ T22] ret_from_fork+0x10/0x20 [ 143.812614][ T22] [ 143.813085][ T22] Allocated by task 22: [ 143.813682][ T22] kasan_save_stack+0x28/0x60 [ 143.814389][ T22] __kasan_slab_alloc+0xb0/0x110 [ 143.815000][ T22] kmem_cache_alloc+0x1cc/0x340 [ 143.815609][ T22] getname_kernel+0x30/0x150 [ 143.816221][ T22] kern_path_locked+0x2c/0x10c [ 143.816834][ T22] handle_remove+0x38/0x284 [ 143.817434][ T22] devtmpfsd+0x8c/0xd0 [ 143.817994][ T22] kthread+0x150/0x15c [ 143.818556][ T22] ret_from_fork+0x10/0x20 [ 143.819218][ T22] [ 143.819641][ T22] Freed by task 22: [ 143.820374][ T22] kasan_save_stack+0x28/0x60 [ 143.820995][ T22] kasan_set_track+0x28/0x3c [ 143.821577][ T22] kasan_set_free_info+0x20/0x30 [ 143.822210][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 143.822913][ T22] __kasan_slab_free+0x10/0x1c [ 143.823510][ T22] slab_free_freelist_hook+0xc4/0x20c [ 143.824191][ T22] kmem_cache_free+0x9c/0x420 [ 143.824832][ T22] putname.part.0+0x68/0x7c [ 143.825411][ T22] kern_path_locked+0x64/0x10c [ 143.826002][ T22] handle_remove+0x38/0x284 [ 143.826592][ T22] devtmpfsd+0x8c/0xd0 [ 143.827156][ T22] kthread+0x150/0x15c [ 143.827708][ T22] ret_from_fork+0x10/0x20 [ 143.828394][ T22] [ 143.828820][ T22] The buggy address belongs to the object at ffff0000029d4100 [ 143.828820][ T22] which belongs to the cache names_cache of size 4096 [ 143.830259][ T22] The buggy address is located 32 bytes inside of [ 143.830259][ T22] 4096-byte region [ffff0000029d4100, ffff0000029d5100) [ 143.831495][ T22] The buggy address belongs to the page: [ 143.832289][ T22] page:0000000062bae2ea refcount:1 mapcount:0 mapping:0000000000000000 index:0xf7ff0000029d5140 pfn:0x429d0 [ 143.833525][ T22] head:0000000062bae2ea order:3 compound_mapcount:0 compound_pincount:0 [ 143.834383][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 143.835790][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 fdff000002837700 [ 143.836763][ T22] raw: f7ff0000029d5140 0000000080070006 00000001ffffffff 0000000000000000 [ 143.837662][ T22] page dumped because: kasan: bad access detected [ 143.838328][ T22] [ 143.838702][ T22] Memory state around the buggy address: [ 143.839509][ T22] ffff0000029d3f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 143.840687][ T22] ffff0000029d4000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 143.841505][ T22] >ffff0000029d4100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 143.842317][ T22] ^ [ 143.842936][ T22] ffff0000029d4200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 143.843730][ T22] ffff0000029d4300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 143.844616][ T22] ================================================================== [ 143.845448][ T22] Disabling lock debugging due to kernel taint [ 145.111274][ T300] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 145.299528][ T300] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 145.917970][ T300] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program [ 163.422729][ T3324] can: request_module (can-proto-0) failed. executing program [ 163.625060][ T3324] can: request_module (can-proto-0) failed. [ 163.808206][ T3324] can: request_module (can-proto-0) failed. executing program executing program [ 171.179424][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 171.188927][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 171.200754][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 171.206297][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 03:02:23 Registers: info registers vcpu 0 PC=ffff80001111e858 X00=ffff80001111e850 X01=0000000000000000 X02=ffff8000121c8000 X03=0000000000000003 X04=fffffc0000280a20 X05=0000000000000001 X06=ffff800011fa9000 X07=ffff800012209840 X08=ffff800010003b14 X09=0000000000000014 X10=00000000000000b0 X11=fcff000004291000 X12=fcff000004291024 X13=00000000000003ce X14=00000000000003ce X15=0000000000000000 X16=ffff800010004000 X17=ffff80006d9f1000 X18=00000000fffffffd X19=ffff8000122ff108 X20=ffff8000122ff100 X21=0000000000000000 X22=0000000000000004 X23=ffff8000122ff108 X24=0000000000000028 X25=ffff8000121e6110 X26=ffff800012209840 X27=0000000000000000 X28=0000000000000000 X29=ffff800010003e30 X30=b89e80001013d8d0 SP=ffff800010003e30 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=0000000000000000:3fd473fd37d7d4b6 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:4122fb2000000000 Z04=0000000000000000:0000040000000000 Z05=4010040140100401:4010040140100401 Z06=0000040000000000:0000040000000000 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=0000000000000010:00000019d071f740 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800010286d50 X00=0000000000000000 X01=00007bffdfffffff X02=0000000000000000 X03=0000000000000000 X04=0000000000015ff5 X05=ffff00007fbd09c8 X06=0000000000000000 X07=ffff8000122cd138 X08=ffff80001221d138 X09=ffff8000122cd138 X10=00000000ffffe000 X11=ffff8000122cd138 X12=ffff80001267b610 X13=000000000000030f X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303978302f6366 X18=00000000fffffffd X19=ffff800011e01fe8 X20=fdff0000029d4120 X21=00000000000000fd X22=ffff800011797dfc X23=ffff0000029d4120 X24=0000000000000000 X25=ffff800011fa9000 X26=0000000000000000 X27=0000000000000000 X28=f6ff0000029a0000 X29=ffff80001267b900 X30=ffff800010286d50 SP=ffff80001267b900 PSTATE=a04000c9 N-C- 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=0000000000000000:3fd473fd37d7d4b6 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:4122fb2000000000 Z04=0000000000000000:0000040000000000 Z05=4010040140100401:4010040140100401 Z06=0000040000000000:0000040000000000 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=0000000000000010:00000019d071f740 Z31=0000000000000000:0000000000000000