syzkaller login: [ 93.987313][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 94.018273][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 94.042888][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:50377' (ECDSA) to the list of known hosts. 1970/01/01 00:01:48 fuzzer started 1970/01/01 00:01:51 connecting to host at localhost:43939 1970/01/01 00:01:51 checking machine... 1970/01/01 00:01:51 checking revisions... 1970/01/01 00:01:52 testing simple program... executing program executing program [ 120.080704][ T3329] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 120.129496][ T3329] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 122.626528][ T3329] device hsr_slave_0 entered promiscuous mode [ 122.667868][ T3329] device hsr_slave_1 entered promiscuous mode executing program [ 124.608342][ T3329] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 124.689637][ T3329] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 124.773142][ T3329] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 124.863924][ T3329] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 126.912049][ T3329] 8021q: adding VLAN 0 to HW filter on device bond0 [ 127.077855][ T3549] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 127.100435][ T3549] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 128.095676][ T3549] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 128.115130][ T3549] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 128.192899][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 128.208949][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 128.278951][ T3549] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 128.330622][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 128.496949][ T3549] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 128.510589][ T3549] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 128.620974][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 128.631067][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 128.708055][ T3329] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 129.054561][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 129.058419][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 131.297989][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 131.315927][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 132.424168][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 132.438576][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 132.472227][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 132.482547][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 132.520023][ T3329] device veth0_vlan entered promiscuous mode [ 132.647685][ T3329] device veth1_vlan entered promiscuous mode [ 133.015328][ T3549] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 133.035116][ T3549] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 133.110905][ T3329] device veth0_macvtap entered promiscuous mode [ 133.182053][ T3329] device veth1_macvtap entered promiscuous mode executing program [ 133.422584][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 133.432382][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 133.443874][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 133.452452][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 133.529555][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 133.538898][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 133.611302][ T3329] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 133.612748][ T3329] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 133.615457][ T3329] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 133.616627][ T3329] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 134.389684][ T3329] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 135.255735][ T29] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 135.440051][ T29] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:14 building call list... [ 135.615219][ T29] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 135.768240][ T29] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 138.647464][ T29] device hsr_slave_0 left promiscuous mode [ 138.716705][ T29] device hsr_slave_1 left promiscuous mode [ 138.867418][ T29] device veth1_macvtap left promiscuous mode [ 138.868640][ T29] device veth0_macvtap left promiscuous mode [ 138.870263][ T29] device veth1_vlan left promiscuous mode [ 138.871374][ T29] device veth0_vlan left promiscuous mode executing program [ 140.348483][ T22] ================================================================== [ 140.349303][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x6000 [ 140.350514][ T22] Read at addr f2ff0000029820a0 by task kdevtmpfs/22 [ 140.351244][ T22] Pointer tag: [f2], memory tag: [fe] [ 140.352045][ T22] [ 140.353512][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-09417-g0319b848b155 #0 [ 140.356734][ T22] Hardware name: linux,dummy-virt (DT) [ 140.358792][ T22] Call trace: [ 140.360018][ T22] dump_backtrace+0x0/0x1ac [ 140.361633][ T22] show_stack+0x18/0x24 [ 140.363237][ T22] dump_stack_lvl+0x68/0x84 [ 140.364871][ T22] print_address_description+0x7c/0x2b4 [ 140.366654][ T22] kasan_report+0x134/0x380 [ 140.368171][ T22] __do_kernel_fault+0x128/0x1bc [ 140.369897][ T22] do_tag_check_fault+0x74/0x90 [ 140.371502][ T22] do_mem_abort+0x44/0xb4 [ 140.373030][ T22] el1_abort+0x40/0x60 [ 140.374455][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 140.375136][ T22] el1h_64_sync+0x78/0x7c [ 140.375780][ T22] __entry_tramp_text_end+0xdfc/0x6000 [ 140.376532][ T22] d_lookup+0x44/0x70 [ 140.377836][ T22] lookup_dcache+0x24/0x84 [ 140.378503][ T22] __lookup_hash+0x24/0xd0 [ 140.379143][ T22] kern_path_locked+0x90/0x10c [ 140.379815][ T22] handle_remove+0x38/0x284 [ 140.380503][ T22] devtmpfsd+0x8c/0xd0 [ 140.381117][ T22] kthread+0x150/0x15c [ 140.381738][ T22] ret_from_fork+0x10/0x20 [ 140.382584][ T22] [ 140.383234][ T22] Allocated by task 22: [ 140.383990][ T22] kasan_save_stack+0x28/0x60 [ 140.384817][ T22] __kasan_slab_alloc+0xb0/0x110 [ 140.385705][ T22] kmem_cache_alloc+0x1cc/0x340 [ 140.387273][ T22] getname_kernel+0x30/0x150 [ 140.388836][ T22] kern_path_locked+0x2c/0x10c [ 140.390018][ T22] handle_remove+0x38/0x284 [ 140.391504][ T22] devtmpfsd+0x8c/0xd0 [ 140.392996][ T22] kthread+0x150/0x15c [ 140.393957][ T22] ret_from_fork+0x10/0x20 [ 140.395540][ T22] [ 140.396473][ T22] Freed by task 22: [ 140.397717][ T22] kasan_save_stack+0x28/0x60 [ 140.399309][ T22] kasan_set_track+0x28/0x3c [ 140.400871][ T22] kasan_set_free_info+0x20/0x30 [ 140.402474][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 140.403521][ T22] __kasan_slab_free+0x10/0x1c [ 140.405172][ T22] slab_free_freelist_hook+0xc4/0x20c [ 140.406927][ T22] kmem_cache_free+0x9c/0x420 [ 140.408523][ T22] putname.part.0+0x68/0x7c [ 140.410087][ T22] kern_path_locked+0x64/0x10c [ 140.411493][ T22] handle_remove+0x38/0x284 [ 140.413209][ T22] devtmpfsd+0x8c/0xd0 [ 140.414072][ T22] kthread+0x150/0x15c [ 140.415674][ T22] ret_from_fork+0x10/0x20 [ 140.417424][ T22] [ 140.418403][ T22] The buggy address belongs to the object at ffff000002982080 [ 140.418403][ T22] which belongs to the cache names_cache of size 4096 [ 140.422161][ T22] The buggy address is located 32 bytes inside of [ 140.422161][ T22] 4096-byte region [ffff000002982080, ffff000002983080) [ 140.424164][ T22] The buggy address belongs to the page: [ 140.425304][ T22] page:0000000059e2f45a refcount:1 mapcount:0 mapping:0000000000000000 index:0xf1ff000002985140 pfn:0x42980 [ 140.427000][ T22] head:0000000059e2f45a order:3 compound_mapcount:0 compound_pincount:0 [ 140.428122][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 140.429937][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 fdff000002837700 [ 140.431089][ T22] raw: f1ff000002985140 0000000080070006 00000001ffffffff 0000000000000000 [ 140.432228][ T22] page dumped because: kasan: bad access detected [ 140.433273][ T22] [ 140.433791][ T22] Memory state around the buggy address: [ 140.434883][ T22] ffff000002981e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 140.436114][ T22] ffff000002981f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 140.437110][ T22] >ffff000002982000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 140.437962][ T22] ^ [ 140.438891][ T22] ffff000002982100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 140.439816][ T22] ffff000002982200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 140.440900][ T22] ================================================================== [ 140.441826][ T22] Disabling lock debugging due to kernel taint [ 141.676737][ T29] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 141.851585][ T29] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 142.486731][ T29] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program [ 160.170819][ T3321] can: request_module (can-proto-0) failed. executing program [ 160.387951][ T3321] can: request_module (can-proto-0) failed. [ 160.537551][ T3321] can: request_module (can-proto-0) failed. executing program executing program [ 167.939778][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 167.961913][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 167.972158][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 167.982442][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 17:36:03 Registers: info registers vcpu 0 PC=ffff80001077ff40 X00=f9ff000002b06080 X01=0000000000000003 X02=0000000000000000 X03=ffff80001233e868 X04=f9ff000002b06080 X05=000000000000005b X06=332e30343120205b X07=205b5d3534303235 X08=000000000000005d X09=ffff80001267b520 X10=000000000000005d X11=ffff8000122d1ab8 X12=5b5d353430323533 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303678302f6366 X18=00000000fffffffd X19=ffff800012429957 X20=ffff8000107804d4 X21=f9ff000002b06080 X22=ffff800012429960 X23=0000000000000f01 X24=0000000000000018 X25=ffff8000121eff90 X26=0000000000000000 X27=ffff800012429948 X28=ffff80001221d0b0 X29=ffff80001267b5d0 X30=ffff8000107804fc SP=ffff80001267b5d0 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=0000000000000000:0000000000000000 Z01=0000000000000000:412bf6e000000000 Z02=0000000000000000:3fda10354838ade6 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=0000000000000010:0000001910629280 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800011123af8 X00=ffff800011123af0 X01=0000000000000000 X02=0000000000000001 X03=ffff00007fbd7ac0 X04=0000000000000000 X05=f9ff0000028eeac0 X06=ffff80006da06000 X07=ffff8000121d2000 X08=ffff8000122fd000 X09=0b0573e3a1ae3911 X10=017439860381ec04 X11=ffff800011dee130 X12=ffff80001246c000 X13=ffff8000121e7000 X14=00000000000041ad X15=0000000000004000 X16=ffff80001000c000 X17=ffff80006da06000 X18=00000000fffffffd X19=ffff8000122ff188 X20=ffff8000122ff180 X21=0000000000000000 X22=0000000000000004 X23=ffff8000122ff188 X24=0000000000000028 X25=0000000000000000 X26=ffff80001013e3a0 X27=ffff00007fbd2f00 X28=ffff00007fbd2ec0 X29=ffff80001000bd70 X30=bdb480001013db40 SP=ffff80001000bd70 PSTATE=004000c9 ---- 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=0000000000000000:3f83e52c6896d66a Z01=0000000000000000:3f847ae147ae147b Z02=0000000000000000:41ccf38af8d20241 Z03=0000000000000000:416312d000000000 Z04=0000000000000000:3fea4fc5bc59a683 Z05=0000000000000000:3fd63925124ce6a0 Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3fedaee1d6c19258 Z08=0000000000000000:3fad8b2dd13dba10 Z09=0000000000000000:3fe3e63fc1496258 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=000000000000001b:00000000ae9e9e08 Z31=0000000000000000:0000000000000000