syzkaller login: [ 102.527927][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 102.543854][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 102.557840][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:38141' (ECDSA) to the list of known hosts. 1970/01/01 00:01:57 fuzzer started 1970/01/01 00:02:00 connecting to host at localhost:42171 1970/01/01 00:02:00 checking machine... 1970/01/01 00:02:00 checking revisions... 1970/01/01 00:02:01 testing simple program... executing program [ 125.437314][ C1] hrtimer: interrupt took 88932272 ns executing program executing program [ 130.939507][ T3319] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 130.971984][ T3319] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 133.917083][ T3319] device hsr_slave_0 entered promiscuous mode [ 133.985989][ T3319] device hsr_slave_1 entered promiscuous mode [ 136.080479][ T3319] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 136.168192][ T3319] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 136.268949][ T3319] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 136.399052][ T3319] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 138.396378][ T3319] 8021q: adding VLAN 0 to HW filter on device bond0 [ 138.551006][ T3462] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 138.571295][ T3462] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 139.665519][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 139.675377][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 139.735672][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 139.743775][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 139.850609][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 139.929989][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 140.131814][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 140.146281][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 140.194960][ T2927] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 140.207150][ T2927] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 140.280386][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 140.485779][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 140.492714][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 142.996484][ T3624] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 143.024076][ T3624] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 144.247177][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 144.256616][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 144.317326][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 144.327328][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 144.370756][ T3319] device veth0_vlan entered promiscuous mode [ 144.554304][ T3319] device veth1_vlan entered promiscuous mode [ 144.915871][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 144.929051][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 144.987323][ T3319] device veth0_macvtap entered promiscuous mode [ 145.064953][ T3319] device veth1_macvtap entered promiscuous mode [ 145.251245][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 145.272921][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 145.353843][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 145.380977][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 145.464850][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 145.476499][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 145.557594][ T3319] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 145.562552][ T3319] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 145.563836][ T3319] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 145.564949][ T3319] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 146.395133][ T3319] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 147.384889][ T10] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:26 building call list... [ 147.572883][ T10] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 147.726557][ T10] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 147.885067][ T10] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 150.675816][ T10] device hsr_slave_0 left promiscuous mode [ 150.732414][ T10] device hsr_slave_1 left promiscuous mode [ 150.906999][ T10] device veth1_macvtap left promiscuous mode [ 150.913886][ T10] device veth0_macvtap left promiscuous mode [ 150.915944][ T10] device veth1_vlan left promiscuous mode [ 150.917246][ T10] device veth0_vlan left promiscuous mode executing program [ 152.464207][ T22] ================================================================== [ 152.466647][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xf000 [ 152.471593][ T22] Read at addr f0ff000002a04120 by task kdevtmpfs/22 [ 152.473301][ T22] Pointer tag: [f0], memory tag: [fe] [ 152.474383][ T22] [ 152.475321][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-04526-gebf435d3b51b #0 [ 152.476549][ T22] Hardware name: linux,dummy-virt (DT) [ 152.477553][ T22] Call trace: [ 152.478208][ T22] dump_backtrace+0x0/0x1b0 [ 152.479035][ T22] show_stack+0x18/0x24 [ 152.479747][ T22] dump_stack_lvl+0x68/0x84 [ 152.480543][ T22] print_address_description+0x7c/0x2b4 [ 152.481339][ T22] kasan_report+0x134/0x380 [ 152.482077][ T22] __do_kernel_fault+0x1a8/0x1dc [ 152.482860][ T22] do_tag_check_fault+0x74/0x90 [ 152.483655][ T22] do_mem_abort+0x44/0xb4 [ 152.484374][ T22] el1_abort+0x40/0x60 [ 152.485071][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 152.485865][ T22] el1h_64_sync+0x78/0x7c [ 152.487311][ T22] __entry_tramp_text_end+0xdfc/0xf000 [ 152.489248][ T22] d_lookup+0x44/0x70 [ 152.489973][ T22] lookup_dcache+0x24/0x84 [ 152.491581][ T22] __lookup_hash+0x24/0xd0 [ 152.493423][ T22] kern_path_locked+0x90/0x10c [ 152.495192][ T22] handle_remove+0x38/0x284 [ 152.496985][ T22] devtmpfsd+0x8c/0xd0 [ 152.499031][ T22] kthread+0x150/0x15c [ 152.500862][ T22] ret_from_fork+0x10/0x18 [ 152.502653][ T22] [ 152.503768][ T22] Allocated by task 22: [ 152.505511][ T22] kasan_save_stack+0x28/0x60 [ 152.506657][ T22] __kasan_slab_alloc+0xb0/0x110 [ 152.508731][ T22] kmem_cache_alloc+0x1cc/0x340 [ 152.510570][ T22] getname_kernel+0x30/0x150 [ 152.512645][ T22] kern_path_locked+0x2c/0x10c [ 152.514383][ T22] handle_remove+0x38/0x284 [ 152.516099][ T22] devtmpfsd+0x8c/0xd0 [ 152.517143][ T22] kthread+0x150/0x15c [ 152.519066][ T22] ret_from_fork+0x10/0x18 [ 152.520839][ T22] [ 152.521831][ T22] Freed by task 22: [ 152.522654][ T22] kasan_save_stack+0x28/0x60 [ 152.524342][ T22] kasan_set_track+0x28/0x3c [ 152.526010][ T22] kasan_set_free_info+0x20/0x30 [ 152.528286][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 152.530290][ T22] __kasan_slab_free+0x10/0x1c [ 152.531940][ T22] slab_free_freelist_hook+0xc4/0x20c [ 152.533040][ T22] kmem_cache_free+0x9c/0x420 [ 152.533744][ T22] putname.part.0+0x68/0x7c [ 152.534500][ T22] kern_path_locked+0x64/0x10c [ 152.535246][ T22] handle_remove+0x38/0x284 [ 152.535988][ T22] devtmpfsd+0x8c/0xd0 [ 152.536704][ T22] kthread+0x150/0x15c [ 152.537432][ T22] ret_from_fork+0x10/0x18 [ 152.538327][ T22] [ 152.538880][ T22] The buggy address belongs to the object at ffff000002a04100 [ 152.538880][ T22] which belongs to the cache names_cache of size 4096 [ 152.540441][ T22] The buggy address is located 32 bytes inside of [ 152.540441][ T22] 4096-byte region [ffff000002a04100, ffff000002a05100) [ 152.541864][ T22] The buggy address belongs to the page: [ 152.542797][ T22] page:00000000ef193eea refcount:1 mapcount:0 mapping:0000000000000000 index:0xfaff000002a01040 pfn:0x42a00 [ 152.544189][ T22] head:00000000ef193eea order:3 compound_mapcount:0 compound_pincount:0 [ 152.545170][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 152.546843][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f7ff000002837700 [ 152.547914][ T22] raw: faff000002a01040 0000000080070005 00000001ffffffff 0000000000000000 [ 152.549033][ T22] page dumped because: kasan: bad access detected [ 152.549777][ T22] [ 152.550206][ T22] Memory state around the buggy address: [ 152.551096][ T22] ffff000002a03f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 152.552032][ T22] ffff000002a04000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 152.552909][ T22] >ffff000002a04100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 152.553803][ T22] ^ [ 152.554532][ T22] ffff000002a04200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 152.555458][ T22] ffff000002a04300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 152.556414][ T22] ================================================================== [ 152.557349][ T22] Disabling lock debugging due to kernel taint [ 153.767420][ T10] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 153.903726][ T10] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 154.731445][ T10] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program [ 172.473059][ T3308] can: request_module (can-proto-0) failed. executing program [ 172.681804][ T3308] can: request_module (can-proto-0) failed. [ 172.849137][ T3308] can: request_module (can-proto-0) failed. executing program executing program [ 180.755434][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 180.767636][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 180.783009][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 180.794079][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 17:32:41 Registers: info registers vcpu 0 PC=ffff8000102880f0 X00=0000000000000032 X01=f3ff0000029a0000 X02=0000000000000000 X03=0000000000000000 X04=0000000000015ff5 X05=ffff00007fb7b9c8 X06=0000000000000000 X07=ffff8000122ed118 X08=ffff80001223d118 X09=ffff8000122ed118 X10=00000000ffffe000 X11=ffff8000122ed118 X12=ffff80001269b5e0 X13=000000000000030b X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306678302f6366 X18=00000000fffffffd X19=ffff80001249a528 X20=f0ff000002a04120 X21=0000000000000000 X22=ffff800011791dfc X23=ffff000002a04120 X24=0000000000000000 X25=f3ff000002f9aa90 X26=0000000000000000 X27=0000000000000000 X28=f3ff0000029a0000 X29=ffff80001269b900 X30=ffff8000102880f0 SP=ffff80001269b900 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=0000000000000000:0000000000000004 Z01=0000000000000000:c1162e42fefa39ef Z02=b6b63f2bc8ad7c04:d6422651bdd96ec9 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=0000000000000010:0000001b333b1c90 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000105f82a0 X00=0000000000000002 X01=0000000000000005 X02=0000000000000000 X03=0000000000041001 X04=0000000000000040 X05=00000000ffffffd0 X06=ffff800012873c50 X07=ffff800012873c50 X08=f7ff000009da8000 X09=ffff800011dd6e68 X10=000000000000000a X11=0000000000000000 X12=f7ff000009da821d X13=f7ff000009da9000 X14=0000000000000000 X15=0000000000000030 X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=f7ff000009da9000 X20=f7ff000009da8256 X21=ffff800012873c50 X22=ffff800012873d00 X23=00000000ffffffd0 X24=0000000000000daa X25=f4ff0000052ea038 X26=00000000000072b0 X27=ffff800011deeda8 X28=f7ff000009da8256 X29=ffff800012873b10 X30=e3f58000105fd438 SP=ffff800012873b10 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=0000000000000000:3fd24eb268b556d9 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:416312d000000000 Z04=0000000000000400:0000000000000000 Z05=4010040140100401:4010040140100401 Z06=0004000000000000:0004000000000000 Z07=0000000000000000:0000000000000002 Z08=0000000000000000:000000000000002a 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=0000000000000005:000000002e2274cb Z31=0000000000000000:0000000000000000