syzkaller login: [ 102.432267][ T3165] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 102.446910][ T3165] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 102.454442][ T3165] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:28127' (ECDSA) to the list of known hosts. 1970/01/01 00:01:59 fuzzer started 1970/01/01 00:02:02 connecting to host at localhost:46199 1970/01/01 00:02:02 checking machine... 1970/01/01 00:02:02 checking revisions... 1970/01/01 00:02:03 testing simple program... executing program executing program [ 130.969989][ T3327] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 131.017811][ T3327] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 133.840366][ T3327] device hsr_slave_0 entered promiscuous mode [ 133.893051][ T3327] device hsr_slave_1 entered promiscuous mode executing program [ 136.156984][ T3327] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 136.251285][ T3327] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 136.391821][ T3327] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 136.487461][ T3327] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 138.613140][ T3327] 8021q: adding VLAN 0 to HW filter on device bond0 [ 138.791623][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 138.803398][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 139.988958][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 140.024737][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 140.112266][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 140.119530][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 140.175120][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 140.282790][ T3462] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 140.574952][ T3462] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 140.587590][ T3462] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 140.730384][ T3462] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 140.740602][ T3462] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 140.792197][ T3327] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 140.978091][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 140.980464][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 143.563058][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 143.593051][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 144.850703][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 144.861062][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 144.887920][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 144.893811][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 144.914674][ T3327] device veth0_vlan entered promiscuous mode [ 145.020818][ T3327] device veth1_vlan entered promiscuous mode [ 145.547251][ T3644] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 145.564826][ T3644] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 145.629822][ T3327] device veth0_macvtap entered promiscuous mode [ 145.709846][ T3327] device veth1_macvtap entered promiscuous mode [ 145.865524][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 145.884061][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 145.956700][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 145.978218][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 146.060492][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 146.082879][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 146.180041][ T3327] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.181582][ T3327] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.182750][ T3327] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.183873][ T3327] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 147.157519][ T3327] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation executing program [ 148.033927][ T10] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:27 building call list... [ 148.290643][ T10] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 148.438615][ T10] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 148.592395][ T10] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 151.810451][ T10] device hsr_slave_0 left promiscuous mode [ 151.895501][ T10] device hsr_slave_1 left promiscuous mode [ 152.050572][ T10] device veth1_macvtap left promiscuous mode [ 152.051814][ T10] device veth0_macvtap left promiscuous mode [ 152.053553][ T10] device veth1_vlan left promiscuous mode [ 152.054825][ T10] device veth0_vlan left promiscuous mode executing program [ 153.777374][ T22] ================================================================== [ 153.778485][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xa000 [ 153.780139][ T22] Read at addr f2ff000002921060 by task kdevtmpfs/22 [ 153.784452][ T22] Pointer tag: [f2], memory tag: [fe] [ 153.785044][ T22] [ 153.785762][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-06779-g477f70cd2a67 #0 [ 153.787566][ T22] Hardware name: linux,dummy-virt (DT) [ 153.788444][ T22] Call trace: [ 153.788909][ T22] dump_backtrace+0x0/0x1b0 [ 153.789595][ T22] show_stack+0x18/0x24 [ 153.790133][ T22] dump_stack_lvl+0x68/0x84 [ 153.790705][ T22] print_address_description+0x7c/0x2b4 [ 153.791366][ T22] kasan_report+0x134/0x380 [ 153.791922][ T22] __do_kernel_fault+0x1a8/0x1dc [ 153.792516][ T22] do_tag_check_fault+0x74/0x90 [ 153.793080][ T22] do_mem_abort+0x44/0xb4 [ 153.793631][ T22] el1_abort+0x40/0x60 [ 153.794143][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 153.794768][ T22] el1h_64_sync+0x78/0x7c [ 153.795325][ T22] __entry_tramp_text_end+0xdfc/0xa000 [ 153.796350][ T22] d_lookup+0x44/0x70 [ 153.796891][ T22] lookup_dcache+0x24/0x84 [ 153.797470][ T22] __lookup_hash+0x24/0xd0 [ 153.798055][ T22] kern_path_locked+0x90/0x10c [ 153.798632][ T22] handle_remove+0x38/0x284 [ 153.799211][ T22] devtmpfsd+0x8c/0xd0 [ 153.799717][ T22] kthread+0x150/0x15c [ 153.800248][ T22] ret_from_fork+0x10/0x18 [ 153.800964][ T22] [ 153.801420][ T22] Allocated by task 22: [ 153.801997][ T22] kasan_save_stack+0x28/0x60 [ 153.802688][ T22] __kasan_slab_alloc+0xb0/0x110 [ 153.803290][ T22] kmem_cache_alloc+0x1cc/0x340 [ 153.803870][ T22] getname_kernel+0x30/0x150 [ 153.804472][ T22] kern_path_locked+0x2c/0x10c [ 153.805064][ T22] handle_remove+0x38/0x284 [ 153.805625][ T22] devtmpfsd+0x8c/0xd0 [ 153.806504][ T22] kthread+0x150/0x15c [ 153.806998][ T22] ret_from_fork+0x10/0x18 [ 153.807593][ T22] [ 153.807983][ T22] Freed by task 22: [ 153.808437][ T22] kasan_save_stack+0x28/0x60 [ 153.808995][ T22] kasan_set_track+0x28/0x3c [ 153.809547][ T22] kasan_set_free_info+0x20/0x30 [ 153.810105][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 153.810745][ T22] __kasan_slab_free+0x10/0x1c [ 153.811330][ T22] slab_free_freelist_hook+0xc4/0x20c [ 153.811913][ T22] kmem_cache_free+0x9c/0x420 [ 153.812449][ T22] putname.part.0+0x68/0x7c [ 153.812996][ T22] kern_path_locked+0x64/0x10c [ 153.813559][ T22] handle_remove+0x38/0x284 [ 153.814062][ T22] devtmpfsd+0x8c/0xd0 [ 153.814565][ T22] kthread+0x150/0x15c [ 153.815059][ T22] ret_from_fork+0x10/0x18 [ 153.815984][ T22] [ 153.816352][ T22] The buggy address belongs to the object at ffff000002921040 [ 153.816352][ T22] which belongs to the cache names_cache of size 4096 [ 153.817528][ T22] The buggy address is located 32 bytes inside of [ 153.817528][ T22] 4096-byte region [ffff000002921040, ffff000002922040) [ 153.818684][ T22] The buggy address belongs to the page: [ 153.819427][ T22] page:00000000fbd7c969 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf1ff0000029230c0 pfn:0x42920 [ 153.820596][ T22] head:00000000fbd7c969 order:3 compound_mapcount:0 compound_pincount:0 [ 153.821427][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 153.822732][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f3ff000002837700 [ 153.823583][ T22] raw: f1ff0000029230c0 0000000080070004 00000001ffffffff 0000000000000000 [ 153.824410][ T22] page dumped because: kasan: bad access detected [ 153.825075][ T22] [ 153.825467][ T22] Memory state around the buggy address: [ 153.826590][ T22] ffff000002920e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 153.827401][ T22] ffff000002920f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 153.828150][ T22] >ffff000002921000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 153.828906][ T22] ^ [ 153.829565][ T22] ffff000002921100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 153.830334][ T22] ffff000002921200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 153.831102][ T22] ================================================================== [ 153.831889][ T22] Disabling lock debugging due to kernel taint [ 155.094087][ T10] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 155.241310][ T10] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 155.779992][ T10] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program executing program [ 175.972027][ T3323] can: request_module (can-proto-0) failed. [ 176.258141][ T3323] can: request_module (can-proto-0) failed. [ 176.399852][ T3323] can: request_module (can-proto-0) failed. executing program [ 177.469769][ T3165] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 177.489883][ T3165] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program [ 181.547695][ T3165] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 181.561710][ T3165] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 19:42:47 Registers: info registers vcpu 0 PC=ffff80001111dfe8 X00=ffff80001111dfe0 X01=f6ff0000028ebd00 X02=0000000000000001 X03=f5ff0000028ecc40 X04=f4ff0000028e8fe8 X05=f4ff0000028e8fd0 X06=0000000000000000 X07=ffff00007fba2b40 X08=ffff00007fba2bc0 X09=0000000000000800 X10=0000000000000001 X11=000000000000b67e X12=007fb6ed07ad01a4 X13=00001fe8241889fe X14=000000000000010e X15=000005717c92dca0 X16=ffff8000100c0bf4 X17=ffff80001130c194 X18=00000000fffffffd X19=ffff80001231f0c8 X20=ffff80001231f0c0 X21=0000000000000000 X22=0000000000000004 X23=ffff80001231f0c8 X24=0000000000000028 X25=ffff80001243c000 X26=0000000000000000 X27=ffff80001231dd20 X28=0000000000000000 X29=ffff800012653bd0 X30=05a580001013e9e0 SP=ffff800012653bd0 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=0000000000000000:402f7c6324c124e8 Z01=0000000000000000:40dca00000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:4134921000000000 Z04=0000000000000000:3ff0000000000000 Z05=0000000000000000:3fd3333333333333 Z06=0000000000000000:0000004000001010 Z07=0000000000000000:3ff0543ebb103378 Z08=0000000000000000:3fc2b99ee59a923c Z09=0000000000000000:3fe2b9d5c8e6e1eb Z10=0000000000000000:3fe0000000000000 Z11=0000000000000000:7a95b432cc377e13 Z12=0000000000000000:3d5ac7b6aadbfaf7 Z13=0000000000000000:9a6c455d89833ce9 Z14=0000000000000000:b90915b227e08dec Z15=0000000000000000:0afe9634720b6fcc 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=0000000000000000:00000000aadd50f0 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff80001077ee0c X00=ffff8000125d5000 X01=0000000000000002 X02=0000000000000000 X03=0000000000000018 X04=faff000002b68880 X05=0000000000000066 X06=372e33353120205b X07=205b5d3933313038 X08=3932303030303066 X09=7962203036303132 X10=3132393230303030 X11=7420796220303630 X12=5b5d393331303837 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306178302f6366 X18=00000000fffffffd X19=ffff8000124489ad X20=ffff80001077ede4 X21=faff000002b68880 X22=ffff8000124489d2 X23=0000000000000f01 X24=000000000000004a X25=ffff80001220ff90 X26=ffff80001235e718 X27=ffff800012448988 X28=ffff8000124487d8 X29=ffff80001269b5a0 X30=ffff80001077ee0c SP=ffff80001269b5a0 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=0000000000000000:0000000000000000 Z01=0000000000000000:c1162e42fefa39ef Z02=df382c9403c4b3e2:ac2aa4b9f369d5f2 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=0000000000000010:0000001b851db0f0 Z31=0000000000000000:0000000000000000