syzkaller login: [ 102.747222][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 102.781317][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 107.645111][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 107.660011][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:24283' (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:41367 1970/01/01 00:02:10 checking machine... 1970/01/01 00:02:10 checking revisions... 1970/01/01 00:02:12 testing simple program... executing program executing program [ 140.754731][ T3338] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 140.795694][ T3338] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 143.366032][ T3338] device hsr_slave_0 entered promiscuous mode [ 143.417391][ T3338] device hsr_slave_1 entered promiscuous mode executing program [ 145.683002][ T3338] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 145.810206][ T3338] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 145.910378][ T3338] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 146.097296][ T3338] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 148.269071][ T3338] 8021q: adding VLAN 0 to HW filter on device bond0 [ 148.377402][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 148.386925][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 149.384198][ T3532] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 149.403848][ T3532] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 149.475173][ T3532] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 149.509167][ T3532] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 149.627665][ T3532] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 149.752015][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready executing program [ 150.033923][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 150.053690][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 150.138750][ T3655] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 150.157893][ T3655] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 150.250065][ T3338] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 150.558574][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 150.560726][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 153.091866][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 153.104244][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 154.204339][ T3532] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 154.226486][ T3532] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 154.256877][ T3532] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 154.271137][ T3532] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 154.318763][ T3338] device veth0_vlan entered promiscuous mode [ 154.556845][ T3338] device veth1_vlan entered promiscuous mode [ 154.876125][ T3655] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 154.888303][ T3655] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 154.946418][ T3338] device veth0_macvtap entered promiscuous mode [ 155.027393][ T3338] device veth1_macvtap entered promiscuous mode [ 155.211062][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 155.220517][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 155.312189][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 155.339146][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 155.470235][ T3532] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 155.481685][ T3532] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 155.557397][ T3338] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 155.559144][ T3338] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 155.560346][ T3338] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 155.561482][ T3338] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 156.415176][ T3338] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 157.318225][ T10] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:36 building call list... [ 157.511325][ T10] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 157.676289][ T10] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 157.867384][ T10] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 160.883061][ T10] device hsr_slave_0 left promiscuous mode [ 160.956770][ T10] device hsr_slave_1 left promiscuous mode [ 161.105487][ T10] device veth1_macvtap left promiscuous mode [ 161.108394][ T10] device veth0_macvtap left promiscuous mode [ 161.134314][ T10] device veth1_vlan left promiscuous mode [ 161.137041][ T10] device veth0_vlan left promiscuous mode executing program [ 162.491615][ T22] ================================================================== [ 162.492782][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x3000 [ 162.494516][ T22] Read at addr f4ff000002a361a0 by task kdevtmpfs/22 [ 162.496195][ T22] Pointer tag: [f4], memory tag: [fe] [ 162.497328][ T22] [ 162.505155][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-09284-gf1583cb1be35 #0 [ 162.506387][ T22] Hardware name: linux,dummy-virt (DT) [ 162.507355][ T22] Call trace: [ 162.507957][ T22] dump_backtrace+0x0/0x1ac [ 162.508831][ T22] show_stack+0x18/0x24 [ 162.523137][ T22] dump_stack_lvl+0x68/0x84 [ 162.523962][ T22] print_address_description+0x7c/0x2b4 [ 162.531108][ T22] kasan_report+0x134/0x380 [ 162.532100][ T22] __do_kernel_fault+0x128/0x1bc [ 162.532926][ T22] do_tag_check_fault+0x74/0x90 [ 162.533880][ T22] do_mem_abort+0x44/0xb4 [ 162.534773][ T22] el1_abort+0x40/0x60 [ 162.535824][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 162.536775][ T22] el1h_64_sync+0x78/0x7c [ 162.537713][ T22] __entry_tramp_text_end+0xdfc/0x3000 [ 162.540880][ T22] d_lookup+0x44/0x70 [ 162.541725][ T22] lookup_dcache+0x24/0x84 [ 162.542712][ T22] __lookup_hash+0x24/0xd0 [ 162.543412][ T22] kern_path_locked+0x90/0x10c [ 162.544113][ T22] handle_remove+0x38/0x284 [ 162.544803][ T22] devtmpfsd+0x8c/0xd0 [ 162.545499][ T22] kthread+0x150/0x15c [ 162.546184][ T22] ret_from_fork+0x10/0x20 [ 162.547143][ T22] [ 162.547759][ T22] Allocated by task 22: [ 162.548558][ T22] kasan_save_stack+0x28/0x60 [ 162.553343][ T22] __kasan_slab_alloc+0xb0/0x110 [ 162.554119][ T22] kmem_cache_alloc+0x1cc/0x340 [ 162.554844][ T22] getname_kernel+0x30/0x150 [ 162.555531][ T22] kern_path_locked+0x2c/0x10c [ 162.556265][ T22] handle_remove+0x38/0x284 [ 162.573251][ T22] devtmpfsd+0x8c/0xd0 [ 162.574217][ T22] kthread+0x150/0x15c [ 162.575173][ T22] ret_from_fork+0x10/0x20 [ 162.576158][ T22] [ 162.576778][ T22] Freed by task 22: [ 162.577590][ T22] kasan_save_stack+0x28/0x60 [ 162.578581][ T22] kasan_set_track+0x28/0x3c [ 162.579504][ T22] kasan_set_free_info+0x20/0x30 [ 162.580466][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 162.581577][ T22] __kasan_slab_free+0x10/0x1c [ 162.582471][ T22] slab_free_freelist_hook+0xc4/0x20c [ 162.593919][ T22] kmem_cache_free+0x9c/0x420 [ 162.594888][ T22] putname.part.0+0x68/0x7c [ 162.595789][ T22] kern_path_locked+0x64/0x10c [ 162.596745][ T22] handle_remove+0x38/0x284 [ 162.597755][ T22] devtmpfsd+0x8c/0xd0 [ 162.598712][ T22] kthread+0x150/0x15c [ 162.599547][ T22] ret_from_fork+0x10/0x20 [ 162.600553][ T22] [ 162.601084][ T22] The buggy address belongs to the object at ffff000002a36180 [ 162.601084][ T22] which belongs to the cache names_cache of size 4096 [ 162.602818][ T22] The buggy address is located 32 bytes inside of [ 162.602818][ T22] 4096-byte region [ffff000002a36180, ffff000002a37180) [ 162.607280][ T22] The buggy address belongs to the page: [ 162.609104][ T22] page:00000000a105b3ae refcount:1 mapcount:0 mapping:0000000000000000 index:0xf3ff000002a34100 pfn:0x42a30 [ 162.610136][ T22] head:00000000a105b3ae order:3 compound_mapcount:0 compound_pincount:0 [ 162.610760][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 162.611800][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 faff000002837700 [ 162.613327][ T22] raw: f3ff000002a34100 0000000080070003 00000001ffffffff 0000000000000000 [ 162.614879][ T22] page dumped because: kasan: bad access detected [ 162.623498][ T22] [ 162.624131][ T22] Memory state around the buggy address: [ 162.625435][ T22] ffff000002a35f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 162.626427][ T22] ffff000002a36000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 162.627351][ T22] >ffff000002a36100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 162.628301][ T22] ^ [ 162.629213][ T22] ffff000002a36200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 162.630198][ T22] ffff000002a36300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 162.631127][ T22] ================================================================== [ 162.632102][ T22] Disabling lock debugging due to kernel taint [ 164.098353][ T10] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 164.244616][ T10] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 164.912138][ T10] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 181.643643][ T3331] can: request_module (can-proto-0) failed. [ 181.869535][ T3331] can: request_module (can-proto-0) failed. [ 182.041723][ T3331] can: request_module (can-proto-0) failed. executing program executing program executing program [ 191.357570][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 191.368823][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 191.382073][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 191.389735][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 23:36:30 Registers: info registers vcpu 0 PC=ffff80001014e110 X00=f0ff00000517c090 X01=00000000000000ff X02=0000000000000000 X03=0000000000000000 X04=0000000000000010 X05=0000000000000001 X06=0000000000000020 X07=000000000000000f X08=0000000000000020 X09=ffff800011ddd5d0 X10=0000000000000020 X11=0000000000000000 X12=f8ff000007410703 X13=f8ff000007411000 X14=0000000000000000 X15=0000000000000030 X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=f8ff000007411000 X20=f8ff000007410703 X21=ffff80001285bc50 X22=ffff8000118d7398 X23=00000000ffffffe8 X24=00000000000008fd X25=0000000000000020 X26=0000000000008655 X27=ffff8000117d2630 X28=0000000000000000 X29=ffff80001285bc50 X30=90f580001014e110 SP=ffff80001285bc60 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=0000000000000000:3fd4bdf57107a780 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:413386e000000000 Z04=0000000000000000:3fed8e7445b508a5 Z05=0000000000000000:3fdcb6822503aae4 Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3fb059816d353b78 Z09=0000000000000000:3fe586d4fec402d3 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=0000000000000000:000000009754e697 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000107814bc X00=ffff8000125b5000 X01=0000000000000002 X02=0000000000000000 X03=0000000000000018 X04=fcff000002b3f880 X05=0000000000000020 X06=342e32363120205b X07=205b5d3832333739 X08=000000000000005d X09=ffff80001267b520 X10=000000000000005d X11=ffff8000122d1b18 X12=5b5d383233373934 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303378302f6366 X18=00000000fffffffd X19=ffff80001242995a X20=ffff800010781494 X21=fcff000002b3f880 X22=ffff800012429960 X23=0000000000000f01 X24=0000000000000018 X25=ffff8000121eff90 X26=0000000000000000 X27=ffff800012429948 X28=ffff80001221d0b0 X29=ffff80001267b5d0 X30=ffff8000107814bc 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=0000000000000000:3fd4bdf57107a780 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:413386e000000000 Z04=0000000000000000:3fed8e7445b508a5 Z05=0000000000000000:3fdcb6822503aae4 Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3fb059816d353b78 Z09=0000000000000000:3fe586d4fec402d3 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=0000000000000000:000000009754e697 Z31=0000000000000000:0000000000000000