syzkaller login: [ 55.199823][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 56.335695][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 58.102262][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:51727' (ECDSA) to the list of known hosts. 1970/01/01 00:01:03 fuzzer started 1970/01/01 00:01:04 connecting to host at localhost:41927 1970/01/01 00:01:04 checking machine... 1970/01/01 00:01:04 checking revisions... 1970/01/01 00:01:05 testing simple program... executing program [ 69.113647][ T3333] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 69.140020][ T3333] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 70.479403][ T3333] device hsr_slave_0 entered promiscuous mode [ 70.522626][ T3333] device hsr_slave_1 entered promiscuous mode executing program [ 71.644920][ T3333] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 71.711954][ T3333] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 71.772841][ T3333] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 71.840658][ T3333] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 72.921158][ T3333] 8021q: adding VLAN 0 to HW filter on device bond0 [ 72.986960][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 72.993493][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 73.520634][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 73.526026][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 73.570974][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 73.575623][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 73.601277][ T3649] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 73.636056][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 73.736626][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 73.744550][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 73.776828][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 73.783338][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 73.816480][ T3333] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 73.932834][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 73.934177][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 75.082708][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 75.087511][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 75.684625][ T3649] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 75.695188][ T3649] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 75.718823][ T3649] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 75.724052][ T3649] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 75.730866][ T3333] device veth0_vlan entered promiscuous mode [ 75.792461][ T3333] device veth1_vlan entered promiscuous mode [ 75.951804][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 75.956667][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 75.965030][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 75.973286][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 76.002887][ T3333] device veth0_macvtap entered promiscuous mode [ 76.039532][ T3333] device veth1_macvtap entered promiscuous mode [ 76.090442][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 76.095265][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 76.165580][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 76.173194][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 76.214786][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 76.222319][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 76.253030][ T3333] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.254133][ T3333] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.254954][ T3333] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.256552][ T3333] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.630222][ T3333] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation 1970/01/01 00:01:16 building call list... [ 77.076857][ T51] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.197005][ T51] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 77.276747][ T51] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.376265][ T51] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 79.649611][ T51] device hsr_slave_0 left promiscuous mode [ 79.701006][ T51] device hsr_slave_1 left promiscuous mode [ 79.806231][ T51] device veth1_macvtap left promiscuous mode [ 79.806929][ T51] device veth0_macvtap left promiscuous mode [ 79.808505][ T51] device veth1_vlan left promiscuous mode [ 79.814080][ T51] device veth0_vlan left promiscuous mode executing program [ 80.516296][ T22] ================================================================== [ 80.517256][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xe000 [ 80.518436][ T22] Read at addr f3ff000002980020 by task kdevtmpfs/22 [ 80.519628][ T22] Pointer tag: [f3], memory tag: [fe] [ 80.520399][ T22] [ 80.521264][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-10318-gac08b1c68d1b #0 [ 80.521911][ T22] Hardware name: linux,dummy-virt (DT) [ 80.522558][ T22] Call trace: [ 80.522857][ T22] dump_backtrace+0x0/0x1ac [ 80.523292][ T22] show_stack+0x18/0x24 [ 80.523664][ T22] dump_stack_lvl+0x68/0x84 [ 80.524116][ T22] print_address_description+0x7c/0x2b4 [ 80.524570][ T22] kasan_report+0x134/0x380 [ 80.525029][ T22] __do_kernel_fault+0x128/0x1bc [ 80.525588][ T22] do_tag_check_fault+0x74/0x90 [ 80.526226][ T22] do_mem_abort+0x44/0xb4 [ 80.526875][ T22] el1_abort+0x40/0x60 [ 80.527333][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 80.528049][ T22] el1h_64_sync+0x78/0x7c [ 80.528500][ T22] __entry_tramp_text_end+0xdfc/0xe000 [ 80.529087][ T22] d_lookup+0x44/0x70 [ 80.529492][ T22] lookup_dcache+0x24/0x84 [ 80.529957][ T22] __lookup_hash+0x24/0xd0 [ 80.530429][ T22] kern_path_locked+0x90/0x10c [ 80.530977][ T22] handle_remove+0x38/0x284 [ 80.531507][ T22] devtmpfsd+0x8c/0xd0 [ 80.531972][ T22] kthread+0x150/0x15c [ 80.532485][ T22] ret_from_fork+0x10/0x20 [ 80.533135][ T22] [ 80.533535][ T22] Allocated by task 22: [ 80.534017][ T22] kasan_save_stack+0x28/0x60 [ 80.534723][ T22] __kasan_slab_alloc+0xb0/0x110 [ 80.535424][ T22] kmem_cache_alloc+0x1cc/0x340 [ 80.535914][ T22] getname_kernel+0x30/0x150 [ 80.536414][ T22] kern_path_locked+0x2c/0x10c [ 80.537031][ T22] handle_remove+0x38/0x284 [ 80.537589][ T22] devtmpfsd+0x8c/0xd0 [ 80.537998][ T22] kthread+0x150/0x15c [ 80.538465][ T22] ret_from_fork+0x10/0x20 [ 80.539021][ T22] [ 80.539389][ T22] Freed by task 22: [ 80.539730][ T22] kasan_save_stack+0x28/0x60 [ 80.540331][ T22] kasan_set_track+0x28/0x3c [ 80.541003][ T22] kasan_set_free_info+0x20/0x30 [ 80.541484][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 80.542189][ T22] __kasan_slab_free+0x10/0x1c [ 80.542596][ T22] slab_free_freelist_hook+0xc4/0x20c [ 80.543007][ T22] kmem_cache_free+0x9c/0x420 [ 80.543396][ T22] putname.part.0+0x68/0x7c [ 80.543792][ T22] kern_path_locked+0x64/0x10c [ 80.544182][ T22] handle_remove+0x38/0x284 [ 80.544557][ T22] devtmpfsd+0x8c/0xd0 [ 80.545065][ T22] kthread+0x150/0x15c [ 80.545436][ T22] ret_from_fork+0x10/0x20 [ 80.545847][ T22] [ 80.546164][ T22] The buggy address belongs to the object at ffff000002980000 [ 80.546164][ T22] which belongs to the cache names_cache of size 4096 [ 80.547325][ T22] The buggy address is located 32 bytes inside of [ 80.547325][ T22] 4096-byte region [ffff000002980000, ffff000002981000) [ 80.548146][ T22] The buggy address belongs to the page: [ 80.548667][ T22] page:0000000005087138 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42980 [ 80.549612][ T22] head:0000000005087138 order:3 compound_mapcount:0 compound_pincount:0 [ 80.550226][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 80.551269][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f1ff000002837700 [ 80.551907][ T22] raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000 [ 80.552701][ T22] page dumped because: kasan: bad access detected [ 80.553269][ T22] [ 80.553541][ T22] Memory state around the buggy address: [ 80.554293][ T22] ffff00000297fe00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 80.554988][ T22] ffff00000297ff00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 80.555730][ T22] >ffff000002980000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 80.556376][ T22] ^ [ 80.556926][ T22] ffff000002980100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 80.557634][ T22] ffff000002980200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 80.558581][ T22] ================================================================== [ 80.559395][ T22] Disabling lock debugging due to kernel taint [ 81.394078][ T51] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 81.499824][ T51] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 81.927788][ T51] bond0 (unregistering): Released all slaves executing program executing program executing program [ 90.215412][ T3329] can: request_module (can-proto-0) failed. [ 90.347223][ T3329] can: request_module (can-proto-0) failed. [ 90.426314][ T3329] can: request_module (can-proto-0) failed. executing program executing program [ 100.722187][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 100.725748][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 100.729936][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 100.733406][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 09:28:03 Registers: info registers vcpu 0 PC=ffff800010780754 X00=f7ff000002b36880 X01=0000000000000002 X02=ffff8000125e5018 X03=0000000000000018 X04=f7ff000002b36880 X05=000000000000003a X06=352e30382020205b X07=205b5d3832363931 X08=726f6d656d202c5d X09=5b203a6761742079 X10=676174207265746e X11=202c5d33665b203a X12=5b5d383236393135 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306578302f6366 X18=00000000fffffffd X19=ffff80001245997d X20=ffff800010780754 X21=f7ff000002b36880 X22=ffff800012459983 X23=0000000000000f01 X24=000000000000003b X25=ffff80001221ff90 X26=0000000000000000 X27=ffff800012459948 X28=ffff80001224d0f0 X29=ffff8000126ab5c0 X30=f0c180001078077c SP=ffff8000126ab5c0 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=3dbc852c2321b15c:1596b50c68efdab8 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=0000000000000010:0000000e9da342e0 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800011129af8 X00=ffff800011129af0 X01=ffff800011129b30 X02=ffff00007fbd1fb8 X03=ffff00007fbd1ff8 X04=0000000000000000 X05=ffff80006d9d5000 X06=0000000001d206d0 X07=0000000000000004 X08=faff000006a05af8 X09=a584c4c98aa11188 X10=e960f5af766ca74d X11=ffff800011e0fb08 X12=0000000000000000 X13=0000000000000225 X14=0000000000000225 X15=0000000000004000 X16=ffff80001000c000 X17=ffff80006d9d5000 X18=0000000000000000 X19=ffff80001249c880 X20=ffff00007fbd1f78 X21=ffff00007fbd1ff8 X22=ffff00007fbd1fb8 X23=ffffffffc4653600 X24=00000012a05f2000 X25=0000000000003d46 X26=ffff00007fbd1ecc X27=ffff00007fbd1fb8 X28=ffff00007fbd1f78 X29=ffff80001000be80 X30=aa9a800011129b48 SP=ffff80001000be80 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=0000000000000000:0000000000000004 Z01=0000000000000000:c1162e42fefa39ef Z02=3dbc852c2321b15c:1596b50c68efdab8 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=0000000000000010:0000000e9da342e0 Z31=0000000000000000:0000000000000000