syzkaller login: [ 102.021145][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 102.051109][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 102.080501][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:19580' (ECDSA) to the list of known hosts. 1970/01/01 00:01:58 fuzzer started 1970/01/01 00:02:01 connecting to host at localhost:43693 1970/01/01 00:02:01 checking machine... 1970/01/01 00:02:01 checking revisions... 1970/01/01 00:02:03 testing simple program... executing program executing program [ 131.542904][ T3329] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 131.596070][ T3329] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 134.321136][ T3329] device hsr_slave_0 entered promiscuous mode [ 134.393640][ T3329] device hsr_slave_1 entered promiscuous mode executing program [ 136.707557][ T3329] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 136.807441][ T3329] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 136.892713][ T3329] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 137.004751][ T3329] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 139.421123][ T3329] 8021q: adding VLAN 0 to HW filter on device bond0 [ 139.553267][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 139.574727][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 140.653173][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 140.666692][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 140.807584][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 140.816783][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready executing program [ 140.927375][ T3417] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 141.036585][ T3417] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 141.214659][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 141.223527][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 141.331000][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 141.344048][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 141.406818][ T3329] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 141.679376][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 141.681701][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 144.637422][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 144.662537][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 145.694273][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 145.720402][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 145.750684][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 145.764887][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 145.810950][ T3329] device veth0_vlan entered promiscuous mode [ 145.936109][ T3329] device veth1_vlan entered promiscuous mode [ 146.290175][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 146.299321][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 146.356112][ T3329] device veth0_macvtap entered promiscuous mode [ 146.431987][ T3329] device veth1_macvtap entered promiscuous mode [ 146.669802][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 146.689952][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 146.701197][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 146.713233][ T2133] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 146.791468][ T3417] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 146.811500][ T3417] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 146.895927][ T3329] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.897559][ T3329] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.899930][ T3329] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.901066][ T3329] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 147.655840][ T3329] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation 1970/01/01 00:02:27 building call list... [ 148.746715][ T8] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 148.893685][ T8] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 149.051520][ T8] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 149.206814][ T8] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 152.177075][ T8] device hsr_slave_0 left promiscuous mode [ 152.251808][ T8] device hsr_slave_1 left promiscuous mode [ 152.384647][ T8] device veth1_macvtap left promiscuous mode [ 152.421969][ T8] device veth0_macvtap left promiscuous mode [ 152.437274][ T8] device veth1_vlan left promiscuous mode [ 152.442070][ T8] device veth0_vlan left promiscuous mode executing program [ 154.018385][ T22] ================================================================== [ 154.019530][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x8000 [ 154.021178][ T22] Read at addr f4ff0000029830e0 by task kdevtmpfs/22 [ 154.022084][ T22] Pointer tag: [f4], memory tag: [fe] [ 154.022779][ T22] [ 154.024876][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-07917-g4a3bb4200a59 #0 [ 154.026475][ T22] Hardware name: linux,dummy-virt (DT) [ 154.027506][ T22] Call trace: [ 154.028286][ T22] dump_backtrace+0x0/0x1ac [ 154.029171][ T22] show_stack+0x18/0x24 [ 154.029831][ T22] dump_stack_lvl+0x68/0x84 [ 154.030540][ T22] print_address_description+0x7c/0x2b4 [ 154.031327][ T22] kasan_report+0x134/0x380 [ 154.032201][ T22] __do_kernel_fault+0x128/0x1bc [ 154.032936][ T22] do_tag_check_fault+0x74/0x90 [ 154.033673][ T22] do_mem_abort+0x44/0xb4 [ 154.034367][ T22] el1_abort+0x40/0x60 [ 154.035062][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 154.035831][ T22] el1h_64_sync+0x78/0x7c [ 154.036581][ T22] __entry_tramp_text_end+0xdfc/0x8000 [ 154.037473][ T22] d_lookup+0x44/0x70 [ 154.038413][ T22] lookup_dcache+0x24/0x84 [ 154.039131][ T22] __lookup_hash+0x24/0xd0 [ 154.039845][ T22] kern_path_locked+0x90/0x10c [ 154.040564][ T22] handle_remove+0x38/0x284 [ 154.041276][ T22] devtmpfsd+0x8c/0xd0 [ 154.041979][ T22] kthread+0x150/0x15c [ 154.042706][ T22] ret_from_fork+0x10/0x20 [ 154.043646][ T22] [ 154.044281][ T22] Allocated by task 22: [ 154.045050][ T22] kasan_save_stack+0x28/0x60 [ 154.047424][ T22] __kasan_slab_alloc+0xb0/0x110 [ 154.048512][ T22] kmem_cache_alloc+0x1cc/0x340 [ 154.049488][ T22] getname_kernel+0x30/0x150 [ 154.050178][ T22] kern_path_locked+0x2c/0x10c [ 154.051403][ T22] handle_remove+0x38/0x284 [ 154.052378][ T22] devtmpfsd+0x8c/0xd0 [ 154.053368][ T22] kthread+0x150/0x15c [ 154.054167][ T22] ret_from_fork+0x10/0x20 [ 154.055036][ T22] [ 154.055566][ T22] Freed by task 22: [ 154.056692][ T22] kasan_save_stack+0x28/0x60 [ 154.057471][ T22] kasan_set_track+0x28/0x3c [ 154.058342][ T22] kasan_set_free_info+0x20/0x30 [ 154.060759][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 154.062128][ T22] __kasan_slab_free+0x10/0x1c [ 154.064419][ T22] slab_free_freelist_hook+0xc4/0x20c [ 154.065667][ T22] kmem_cache_free+0x9c/0x420 [ 154.066800][ T22] putname.part.0+0x68/0x7c [ 154.067639][ T22] kern_path_locked+0x64/0x10c [ 154.068895][ T22] handle_remove+0x38/0x284 [ 154.069694][ T22] devtmpfsd+0x8c/0xd0 [ 154.070530][ T22] kthread+0x150/0x15c [ 154.071376][ T22] ret_from_fork+0x10/0x20 [ 154.072243][ T22] [ 154.072985][ T22] The buggy address belongs to the object at ffff0000029830c0 [ 154.072985][ T22] which belongs to the cache names_cache of size 4096 [ 154.074939][ T22] The buggy address is located 32 bytes inside of [ 154.074939][ T22] 4096-byte region [ffff0000029830c0, ffff0000029840c0) [ 154.078758][ T22] The buggy address belongs to the page: [ 154.079817][ T22] page:00000000d3ba454f refcount:1 mapcount:0 mapping:0000000000000000 index:0xf5ff000002982080 pfn:0x42980 [ 154.081660][ T22] head:00000000d3ba454f order:3 compound_mapcount:0 compound_pincount:0 [ 154.084548][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 154.086440][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f6ff000002837700 [ 154.087586][ T22] raw: f5ff000002982080 0000000080070003 00000001ffffffff 0000000000000000 [ 154.088928][ T22] page dumped because: kasan: bad access detected [ 154.090763][ T22] [ 154.091776][ T22] Memory state around the buggy address: [ 154.094008][ T22] ffff000002982e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.095108][ T22] ffff000002982f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.096066][ T22] >ffff000002983000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.098910][ T22] ^ [ 154.102072][ T22] ffff000002983100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.105298][ T22] ffff000002983200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.106408][ T22] ================================================================== [ 154.107394][ T22] Disabling lock debugging due to kernel taint [ 155.369037][ T8] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 155.504395][ T8] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 156.160347][ T8] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 175.122176][ T3324] can: request_module (can-proto-0) failed. [ 175.348511][ T3324] can: request_module (can-proto-0) failed. [ 175.549819][ T3324] can: request_module (can-proto-0) failed. executing program executing program [ 181.974454][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 182.002555][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 182.008853][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 182.014073][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 17:52:20 Registers: info registers vcpu 0 PC=ffff80001111f668 X00=ffff80001111f660 X01=0000000000000000 X02=0000000000000000 X03=ffff800011e2e440 X04=ffff80001267b6f0 X05=f1ff0000029a0000 X06=0000000000000000 X07=00000000ffffffc8 X08=ffff80001267b830 X09=ffff80001267b830 X10=00000000ffffe000 X11=ffff8000122cd160 X12=ffff80001267b610 X13=000000000000030b X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303878302f6366 X18=00000000fffffffd X19=ffff8000122ff108 X20=ffff8000122ff100 X21=0000000000000000 X22=0000000000000004 X23=ffff8000122ff108 X24=0000000000000028 X25=ffff800011e2e440 X26=0000000000000016 X27=0000000000000000 X28=f1ff0000029a0000 X29=ffff80001267b540 X30=38a680001013d6a0 SP=ffff80001267b540 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:c1162e42fefa39ef Z02=4b570de235f12c0c:382cfa23c38f6f98 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=0000000000000010:0000001b6296a970 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000105f8290 X00=0000000000000001 X01=ffff800011df0a00 X02=f1ff000008f50235 X03=ffff0a00ffffff04 X04=0000000000000011 X05=f4ff000008eed000 X06=0000000000000000 X07=0000000000000010 X08=00000000ffffffff X09=ffff800011dd8af8 X10=0000000000000020 X11=0000000000000000 X12=f4ff000008eec216 X13=f4ff000008eed000 X14=0000000000000000 X15=0000000000000030 X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=fbff0000050d9000 X20=f1ff000008f50200 X21=ffff80001283bd28 X22=ffff80001283bd00 X23=0000000000000000 X24=fbff0000050d9028 X25=fbff0000050d9038 X26=000000000000687b X27=ffff8000117d2570 X28=0000000000000000 X29=ffff80001283bc10 X30=ffff80001014e6f8 SP=ffff80001283bc40 PSTATE=80400009 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=0000000000000000:3f9055f67e0b27e4 Z01=0000000000000000:3f847ae147ae147b Z02=0000000000000000:41d7c58e913f9340 Z03=0000000000000000:416312d000000000 Z04=0000000000000000:0000000000000000 Z05=0000000000000000:4010040140100401 Z06=0000000000000000:0000000000000000 Z07=0000000000000000:7630e955bb950b06 Z08=0000000000000000:3fb3855f6dd1e688 Z09=0000000000000000:3fe3177cf305c865 Z10=0000000000000000:3fe0000000000000 Z11=0000000000000000:7843f11728171cc0 Z12=0000000000000000:2dc73c3ec4f73808 Z13=0000000000000000:e381f5a7b79b6609 Z14=0000000000000000:d8b51dbc0d50f2c6 Z15=0000000000000000:c40eb69885fdd648 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=0000000000000000:000000001eedb143 Z31=0000000000000000:0000000000000000