syzkaller login: [ 104.604023][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 104.651622][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 104.657415][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:13252' (ECDSA) to the list of known hosts. 1970/01/01 00:02:11 fuzzer started 1970/01/01 00:02:14 connecting to host at localhost:46473 1970/01/01 00:02:14 checking machine... 1970/01/01 00:02:14 checking revisions... 1970/01/01 00:02:16 testing simple program... executing program executing program [ 144.179437][ T3328] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 144.225882][ T3328] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 146.759603][ T3328] device hsr_slave_0 entered promiscuous mode [ 146.827660][ T3328] device hsr_slave_1 entered promiscuous mode executing program [ 148.757219][ T3328] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 148.840602][ T3328] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 148.945178][ T3328] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 149.034253][ T3328] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 150.754665][ T3328] 8021q: adding VLAN 0 to HW filter on device bond0 [ 150.875960][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 150.885415][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 151.957747][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 151.968448][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 152.040682][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 152.056965][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 152.138831][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 152.228431][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 152.446936][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 152.463761][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 152.555916][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 152.576616][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 152.662031][ T3328] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 152.978070][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 152.997900][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 155.153114][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 155.174586][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 156.342702][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 156.364837][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 156.400429][ T3638] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 156.424965][ T3638] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 156.467606][ T3328] device veth0_vlan entered promiscuous mode [ 156.588065][ T3328] device veth1_vlan entered promiscuous mode executing program [ 156.925115][ T3638] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 156.940676][ T3638] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 157.014210][ T3328] device veth0_macvtap entered promiscuous mode [ 157.087560][ T3328] device veth1_macvtap entered promiscuous mode [ 157.326881][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 157.336861][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 157.356655][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 157.366736][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 157.458356][ T3638] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 157.467495][ T3638] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 157.535825][ T3328] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.537192][ T3328] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.538287][ T3328] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.539373][ T3328] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.287348][ T3328] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 159.274606][ T150] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:38 building call list... [ 159.472006][ T150] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.610952][ T150] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.784141][ T150] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 162.642570][ T150] device hsr_slave_0 left promiscuous mode [ 162.704320][ T150] device hsr_slave_1 left promiscuous mode [ 162.820843][ T150] device veth1_macvtap left promiscuous mode [ 162.823751][ T150] device veth0_macvtap left promiscuous mode [ 162.837395][ T150] device veth1_vlan left promiscuous mode [ 162.838973][ T150] device veth0_vlan left promiscuous mode executing program [ 164.369834][ T22] ================================================================== [ 164.371063][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xa000 [ 164.372843][ T22] Read at addr f7ff0000029ca0a0 by task kdevtmpfs/22 [ 164.376834][ T22] Pointer tag: [f7], memory tag: [fe] [ 164.379339][ T22] [ 164.380262][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-07511-g7c636d4d20f8 #0 [ 164.382841][ T22] Hardware name: linux,dummy-virt (DT) [ 164.384146][ T22] Call trace: [ 164.384918][ T22] dump_backtrace+0x0/0x1ac [ 164.386001][ T22] show_stack+0x18/0x24 [ 164.386953][ T22] dump_stack_lvl+0x68/0x84 [ 164.387901][ T22] print_address_description+0x7c/0x2b4 [ 164.389068][ T22] kasan_report+0x134/0x380 [ 164.390038][ T22] __do_kernel_fault+0x128/0x1bc [ 164.391204][ T22] do_tag_check_fault+0x74/0x90 [ 164.392042][ T22] do_mem_abort+0x44/0xb4 [ 164.392813][ T22] el1_abort+0x40/0x60 [ 164.393431][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 164.394174][ T22] el1h_64_sync+0x78/0x7c [ 164.394941][ T22] __entry_tramp_text_end+0xdfc/0xa000 [ 164.395736][ T22] d_lookup+0x44/0x70 [ 164.396322][ T22] lookup_dcache+0x24/0x84 [ 164.396913][ T22] __lookup_hash+0x24/0xd0 [ 164.397532][ T22] kern_path_locked+0x90/0x10c [ 164.398205][ T22] handle_remove+0x38/0x284 [ 164.398897][ T22] devtmpfsd+0x8c/0xd0 [ 164.399528][ T22] kthread+0x150/0x15c [ 164.400200][ T22] ret_from_fork+0x10/0x20 [ 164.401235][ T22] [ 164.401875][ T22] Allocated by task 22: [ 164.402645][ T22] kasan_save_stack+0x28/0x60 [ 164.403716][ T22] __kasan_slab_alloc+0xb0/0x110 [ 164.404505][ T22] kmem_cache_alloc+0x1cc/0x340 [ 164.405200][ T22] getname_kernel+0x30/0x150 [ 164.405889][ T22] kern_path_locked+0x2c/0x10c [ 164.406601][ T22] handle_remove+0x38/0x284 [ 164.407288][ T22] devtmpfsd+0x8c/0xd0 [ 164.407996][ T22] kthread+0x150/0x15c [ 164.408682][ T22] ret_from_fork+0x10/0x20 [ 164.409389][ T22] [ 164.409881][ T22] Freed by task 22: [ 164.410421][ T22] kasan_save_stack+0x28/0x60 [ 164.411308][ T22] kasan_set_track+0x28/0x3c [ 164.412076][ T22] kasan_set_free_info+0x20/0x30 [ 164.412811][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 164.413734][ T22] __kasan_slab_free+0x10/0x1c [ 164.414422][ T22] slab_free_freelist_hook+0xc4/0x20c [ 164.415197][ T22] kmem_cache_free+0x9c/0x420 [ 164.415892][ T22] putname.part.0+0x68/0x7c [ 164.416517][ T22] kern_path_locked+0x64/0x10c [ 164.417232][ T22] handle_remove+0x38/0x284 [ 164.418887][ T22] devtmpfsd+0x8c/0xd0 [ 164.420426][ T22] kthread+0x150/0x15c [ 164.422664][ T22] ret_from_fork+0x10/0x20 [ 164.425177][ T22] [ 164.426272][ T22] The buggy address belongs to the object at ffff0000029ca080 [ 164.426272][ T22] which belongs to the cache names_cache of size 4096 [ 164.429053][ T22] The buggy address is located 32 bytes inside of [ 164.429053][ T22] 4096-byte region [ffff0000029ca080, ffff0000029cb080) [ 164.431504][ T22] The buggy address belongs to the page: [ 164.432379][ T22] page:00000000e40b888c refcount:1 mapcount:0 mapping:0000000000000000 index:0xf6ff0000029ce180 pfn:0x429c8 [ 164.433797][ T22] head:00000000e40b888c order:3 compound_mapcount:0 compound_pincount:0 [ 164.434871][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 164.436532][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f7ff000002837700 [ 164.437444][ T22] raw: f6ff0000029ce180 0000000080070002 00000001ffffffff 0000000000000000 [ 164.438369][ T22] page dumped because: kasan: bad access detected [ 164.439118][ T22] [ 164.439593][ T22] Memory state around the buggy address: [ 164.440545][ T22] ffff0000029c9e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 164.442372][ T22] ffff0000029c9f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 164.443344][ T22] >ffff0000029ca000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 164.444231][ T22] ^ [ 164.445103][ T22] ffff0000029ca100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 164.445989][ T22] ffff0000029ca200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 164.446929][ T22] ================================================================== [ 164.447798][ T22] Disabling lock debugging due to kernel taint [ 165.674435][ T150] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 165.830291][ T150] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 166.449650][ T150] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program [ 183.510160][ T3321] can: request_module (can-proto-0) failed. [ 183.686361][ T3321] can: request_module (can-proto-0) failed. [ 183.832637][ T3321] can: request_module (can-proto-0) failed. executing program executing program executing program [ 190.674997][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 190.680511][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 190.694889][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 190.700200][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 23:32:53 Registers: info registers vcpu 0 PC=ffff80001111f398 X00=ffff80001111f390 X01=0000000000000000 X02=0000000000000001 X03=ffff00007fbd7ac0 X04=0000000000000000 X05=ffff00007fbd7ac0 X06=0000000000000000 X07=0000000000000075 X08=0000000000000358 X09=0000000000000004 X10=0000000000000000 X11=0000000000000000 X12=0000000000000003 X13=0000000000000003 X14=0000000000000000 X15=0000000000000000 X16=ffff800010004000 X17=ffff80006d9b1000 X18=00000000fffffffd X19=ffff80001231f0c8 X20=ffff80001231f0c0 X21=0000000000000000 X22=0000000000000004 X23=ffff80001231f0c8 X24=0000000000000028 X25=0000000000000000 X26=faff000002959a20 X27=ffff00007fb7b828 X28=ffff00007fbd7ac0 X29=ffff800010003c30 X30=fbce80001013e3f0 SP=ffff800010003c30 PSTATE=204000c9 --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=0000000000000000:3fd3333333333333 Z01=0000000000000000:3fc7f90e05e9c996 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:4121ffa000000000 Z04=0000000000000000:0000040000000000 Z05=4010040140100401:4010040140100401 Z06=0000040000000000:0000040000000000 Z07=0000000000000000:3fee5fa8e6b81a0c Z08=0000000000000000:3fc5c1800c62542c Z09=0000000000000000:3fe2af1a0d5d339c Z10=0000000000000000:3fe0000000000000 Z11=0000000000000000:ba545a7414244cf2 Z12=0000000000000000:5e6025058c37cd7e Z13=0000000000000000:915023318d0d962a Z14=0000000000000000:4594eb71c3957d91 Z15=0000000000000000:5b47a4da26fea2c7 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=000000000000000e:000000004a38e623 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff80001078086c X00=ffff8000125d5000 X01=0000000000000002 X02=0000000000000000 X03=0000000000000018 X04=f3ff000002b92080 X05=0000000000000030 X06=332e34363120205b X07=205b5d3334383237 X08=3932303030303066 X09=7962203061306163 X10=6163393230303030 X11=7420796220306130 X12=5b5d333438323733 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306178302f6366 X18=00000000fffffffd X19=ffff80001244897c X20=ffff800010780844 X21=f3ff000002b92080 X22=ffff800012448992 X23=0000000000000f01 X24=000000000000004a X25=ffff80001220ff90 X26=ffff80001235e718 X27=ffff800012448948 X28=ffff800012448798 X29=ffff80001269b5a0 X30=ffff80001078086c 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=0000000000000000:0000000000000004 Z01=0000000000000000:c1162e42fefa39ef Z02=9943d4c39eea65b9:d2eb154b8f86aeeb 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=0000000000000010:0000001e84986fe0 Z31=0000000000000000:0000000000000000