syzkaller login: [ 93.774636][ T3169] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 101.192415][ T3169] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 101.201240][ T3169] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:18856' (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:34711 1970/01/01 00:02:02 checking machine... 1970/01/01 00:02:02 checking revisions... 1970/01/01 00:02:03 testing simple program... executing program executing program [ 130.452489][ T3331] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 130.492762][ T3331] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 132.854819][ T3331] device hsr_slave_0 entered promiscuous mode [ 132.906324][ T3331] device hsr_slave_1 entered promiscuous mode [ 134.886150][ T3331] netdevsim netdevsim0 netdevsim0: renamed from eth0 executing program [ 134.995597][ T3331] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 135.103306][ T3331] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 135.190143][ T3331] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 137.300217][ T3331] 8021q: adding VLAN 0 to HW filter on device bond0 [ 137.453342][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 137.480707][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 138.432510][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 138.438700][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 138.531635][ T3641] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 138.540318][ T3641] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 138.609825][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 138.714777][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 138.954265][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 138.964894][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 139.047933][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 139.059338][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 139.134611][ T3331] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 139.371235][ T3641] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 139.373776][ T3641] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 141.523194][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 141.542533][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 142.638722][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 142.657270][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 142.684893][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 142.700150][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 142.742338][ T3331] device veth0_vlan entered promiscuous mode [ 142.870144][ T3331] device veth1_vlan entered promiscuous mode [ 143.274942][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 143.294857][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 143.363890][ T3331] device veth0_macvtap entered promiscuous mode [ 143.444596][ T3331] device veth1_macvtap entered promiscuous mode [ 143.641867][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 143.657953][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 143.732711][ T3641] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 143.747538][ T3641] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 143.807526][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 143.819471][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 143.885205][ T3331] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 143.886422][ T3331] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 143.887351][ T3331] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 143.888307][ T3331] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 144.579402][ T3331] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 145.347025][ T50] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:24 building call list... [ 145.525094][ T50] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 145.698890][ T50] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 145.871180][ T50] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 148.917827][ T50] device hsr_slave_0 left promiscuous mode [ 148.994382][ T50] device hsr_slave_1 left promiscuous mode [ 149.133342][ T50] device veth1_macvtap left promiscuous mode [ 149.134526][ T50] device veth0_macvtap left promiscuous mode [ 149.136175][ T50] device veth1_vlan left promiscuous mode [ 149.137329][ T50] device veth0_vlan left promiscuous mode executing program [ 150.706392][ T22] ================================================================== [ 150.707610][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x5000 [ 150.709165][ T22] Read at addr faff000002a30020 by task kdevtmpfs/22 [ 150.710613][ T22] Pointer tag: [fa], memory tag: [fe] [ 150.712874][ T22] [ 150.714370][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-09687-g27151f177827 #0 [ 150.720563][ T22] Hardware name: linux,dummy-virt (DT) [ 150.721489][ T22] Call trace: [ 150.721968][ T22] dump_backtrace+0x0/0x1ac [ 150.722678][ T22] show_stack+0x18/0x24 [ 150.723281][ T22] dump_stack_lvl+0x68/0x84 [ 150.723961][ T22] print_address_description+0x7c/0x2b4 [ 150.724703][ T22] kasan_report+0x134/0x380 [ 150.725351][ T22] __do_kernel_fault+0x128/0x1bc [ 150.726009][ T22] do_tag_check_fault+0x74/0x90 [ 150.726668][ T22] do_mem_abort+0x44/0xb4 [ 150.727364][ T22] el1_abort+0x40/0x60 [ 150.728078][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 150.728787][ T22] el1h_64_sync+0x78/0x7c [ 150.729389][ T22] __entry_tramp_text_end+0xdfc/0x5000 [ 150.730121][ T22] d_lookup+0x44/0x70 [ 150.730776][ T22] lookup_dcache+0x24/0x84 [ 150.731423][ T22] __lookup_hash+0x24/0xd0 [ 150.732073][ T22] kern_path_locked+0x90/0x10c [ 150.732755][ T22] handle_remove+0x38/0x284 [ 150.734148][ T22] devtmpfsd+0x8c/0xd0 [ 150.735757][ T22] kthread+0x150/0x15c [ 150.741210][ T22] ret_from_fork+0x10/0x20 [ 150.742165][ T22] [ 150.742753][ T22] Allocated by task 22: [ 150.743457][ T22] kasan_save_stack+0x28/0x60 [ 150.744322][ T22] __kasan_slab_alloc+0xb0/0x110 [ 150.745041][ T22] kmem_cache_alloc+0x1cc/0x340 [ 150.745785][ T22] getname_kernel+0x30/0x150 [ 150.746454][ T22] kern_path_locked+0x2c/0x10c [ 150.747124][ T22] handle_remove+0x38/0x284 [ 150.747784][ T22] devtmpfsd+0x8c/0xd0 [ 150.748412][ T22] kthread+0x150/0x15c [ 150.749049][ T22] ret_from_fork+0x10/0x20 [ 150.749794][ T22] [ 150.750265][ T22] Freed by task 22: [ 150.750900][ T22] kasan_save_stack+0x28/0x60 [ 150.751576][ T22] kasan_set_track+0x28/0x3c [ 150.752265][ T22] kasan_set_free_info+0x20/0x30 [ 150.752966][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 150.756749][ T22] __kasan_slab_free+0x10/0x1c [ 150.758198][ T22] slab_free_freelist_hook+0xc4/0x20c [ 150.762988][ T22] kmem_cache_free+0x9c/0x420 [ 150.764824][ T22] putname.part.0+0x68/0x7c [ 150.765797][ T22] kern_path_locked+0x64/0x10c [ 150.766710][ T22] handle_remove+0x38/0x284 [ 150.767691][ T22] devtmpfsd+0x8c/0xd0 [ 150.768484][ T22] kthread+0x150/0x15c [ 150.769139][ T22] ret_from_fork+0x10/0x20 [ 150.770101][ T22] [ 150.770865][ T22] The buggy address belongs to the object at ffff000002a30000 [ 150.770865][ T22] which belongs to the cache names_cache of size 4096 [ 150.772616][ T22] The buggy address is located 32 bytes inside of [ 150.772616][ T22] 4096-byte region [ffff000002a30000, ffff000002a31000) [ 150.774015][ T22] The buggy address belongs to the page: [ 150.774845][ T22] page:000000005e9c1dfb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42a30 [ 150.776184][ T22] head:000000005e9c1dfb order:3 compound_mapcount:0 compound_pincount:0 [ 150.777149][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 150.778854][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 fcff000002837700 [ 150.779840][ T22] raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000 [ 150.780889][ T22] page dumped because: kasan: bad access detected [ 150.783274][ T22] [ 150.784317][ T22] Memory state around the buggy address: [ 150.785943][ T22] ffff000002a2fe00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 150.787130][ T22] ffff000002a2ff00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 150.788004][ T22] >ffff000002a30000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 150.788889][ T22] ^ [ 150.790301][ T22] ffff000002a30100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 150.793065][ T22] ffff000002a30200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 150.795698][ T22] ================================================================== [ 150.796701][ T22] Disabling lock debugging due to kernel taint [ 151.908229][ T50] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 152.036933][ T50] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 152.659887][ T50] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 170.192107][ T3322] can: request_module (can-proto-0) failed. [ 170.369479][ T3322] can: request_module (can-proto-0) failed. [ 170.527645][ T3322] can: request_module (can-proto-0) failed. executing program executing program executing program [ 179.539415][ T3169] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 179.547810][ T3169] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 179.562519][ T3169] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 179.568591][ T3169] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 19:16:21 Registers: info registers vcpu 0 PC=ffff800011123cb4 X00=0000000000084867 X01=ffff00007fbc6c00 X02=ffff800011123cb0 X03=0000000010000000 X04=001a39de00000000 X05=00ffffffffffffff X06=0000000233bce48a X07=7fffffffffffffff X08=00000022e623e480 X09=00000000030ee7c3 X10=0000000000000131 X11=0000000000000002 X12=0000000000000001 X13=0000000000000001 X14=0000000000000131 X15=0000b565289b360c X16=ffff800010004000 X17=ffff80006d9f1000 X18=0000000000000000 X19=ffff00007fbc6c00 X20=0008486700000000 X21=0000000000000000 X22=00000022e6293e10 X23=0000000000000003 X24=7fffffffffffffff X25=ffff00007fbbdecc X26=ffff00007fbbdff8 X27=ffff00007fbbdfb8 X28=ffff00007fbbdf78 X29=ffff800010003e80 X30=d0d980001013ac74 SP=ffff800010003e80 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=9e1d3228c8a7de2f:2e00fcad728e7445 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=0000000000000010:0000001b5f36be20 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800010287990 X00=0000000000000023 X01=f9ff0000029a0000 X02=0000000000000000 X03=0000000000000000 X04=0000000000015ff5 X05=ffff00007fbd09c8 X06=0000000000000000 X07=ffff8000122cd1e0 X08=ffff80001221d1e0 X09=ffff8000122cd1e0 X10=00000000ffffe000 X11=ffff8000122cd1e0 X12=ffff80001267b600 X13=000000000000030b X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303578302f6366 X18=00000000fffffffd X19=ffff800011e06ee8 X20=faff000002a30020 X21=00000000000000fa X22=ffff80001179bdfc X23=ffff000002a30020 X24=0000000000000000 X25=ffff800011fae000 X26=0000000000000000 X27=0000000000000000 X28=f9ff0000029a0000 X29=ffff80001267b900 X30=ffff800010287990 SP=ffff80001267b900 PSTATE=604000c9 -ZC- EL2h BTYPE=0 FPCR=00000000 FPSR=00000000 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=000000000000005b:00000000154dcb60 Z02=00000000154dcb88:00000000154dcba8 Z03=aa00aa00aaa8aa00:aa00aa00aaa8aa00 Z04=8020080200000000:8020080200000000 Z05=0000000000000000:0000000000000000 Z06=0000000000000000:0000000000000000 Z07=8020080280200802:8020080280200802 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=4010040140100401:4010040140100401 Z17=40000000a00aa00a:4000aaaaaa00aa00 Z18=4000000000000000:8020080280200802 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=0000000000000000:0000000000000000 Z31=0000000000000000:0000000000000000