syzkaller login: [ 103.474146][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 103.505615][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 103.534986][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:51412' (ECDSA) to the list of known hosts. 1970/01/01 00:01:59 fuzzer started 1970/01/01 00:02:02 connecting to host at localhost:33629 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 [ 131.805656][ T3325] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 131.848225][ T3325] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 134.804515][ T3325] device hsr_slave_0 entered promiscuous mode [ 134.907388][ T3325] device hsr_slave_1 entered promiscuous mode executing program [ 136.969943][ T3325] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 137.048968][ T3325] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 137.159837][ T3325] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 137.249298][ T3325] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 139.620451][ T3325] 8021q: adding VLAN 0 to HW filter on device bond0 [ 139.778254][ T2930] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 139.794151][ T2930] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 140.887620][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 140.898675][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 140.989307][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 140.999951][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 141.096740][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 141.170091][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 141.368715][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 141.378437][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 141.458704][ T3095] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 141.468512][ T3095] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 141.561930][ T3325] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 141.864406][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 141.867408][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 144.147492][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 144.173022][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 145.488370][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 145.498655][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 145.525482][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 145.534889][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 145.628404][ T3325] device veth0_vlan entered promiscuous mode [ 145.799453][ T3325] device veth1_vlan entered promiscuous mode [ 146.189916][ T2930] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 146.228852][ T2930] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 146.327790][ T3325] device veth0_macvtap entered promiscuous mode [ 146.429619][ T3325] device veth1_macvtap entered promiscuous mode [ 146.515206][ T2930] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 146.528255][ T2930] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 146.648662][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 146.660158][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 146.732061][ T2930] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 146.746002][ T2930] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 146.796298][ T3325] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.797704][ T3325] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.798802][ T3325] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.799851][ T3325] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 147.730106][ T3325] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation executing program [ 148.565542][ T117] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:27 building call list... [ 148.844484][ T117] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 149.002261][ T117] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 149.204127][ T117] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 152.084908][ T117] device hsr_slave_0 left promiscuous mode [ 152.153964][ T117] device hsr_slave_1 left promiscuous mode [ 152.324194][ T117] device veth1_macvtap left promiscuous mode [ 152.325396][ T117] device veth0_macvtap left promiscuous mode [ 152.333217][ T117] device veth1_vlan left promiscuous mode [ 152.334478][ T117] device veth0_vlan left promiscuous mode [ 154.024739][ T22] ================================================================== [ 154.025826][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xa000 [ 154.027716][ T22] Read at addr f2ff000002981060 by task kdevtmpfs/22 [ 154.029965][ T22] Pointer tag: [f2], memory tag: [fe] [ 154.033462][ T22] [ 154.034557][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-05424-g835d31d319d9 #0 [ 154.035874][ T22] Hardware name: linux,dummy-virt (DT) [ 154.039283][ T22] Call trace: [ 154.039821][ T22] dump_backtrace+0x0/0x1b0 [ 154.040672][ T22] show_stack+0x18/0x24 [ 154.041446][ T22] dump_stack_lvl+0x68/0x84 [ 154.042246][ T22] print_address_description+0x7c/0x2b4 [ 154.043112][ T22] kasan_report+0x134/0x380 [ 154.043905][ T22] __do_kernel_fault+0x1a8/0x1dc [ 154.044686][ T22] do_tag_check_fault+0x74/0x90 [ 154.045500][ T22] do_mem_abort+0x44/0xb4 [ 154.046273][ T22] el1_abort+0x40/0x60 [ 154.047000][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 154.047813][ T22] el1h_64_sync+0x78/0x7c [ 154.048470][ T22] __entry_tramp_text_end+0xdfc/0xa000 [ 154.049217][ T22] d_lookup+0x44/0x70 [ 154.049994][ T22] lookup_dcache+0x24/0x84 [ 154.050743][ T22] __lookup_hash+0x24/0xd0 [ 154.052765][ T22] kern_path_locked+0x90/0x10c [ 154.054247][ T22] handle_remove+0x38/0x284 [ 154.055034][ T22] devtmpfsd+0x8c/0xd0 [ 154.055738][ T22] kthread+0x150/0x15c [ 154.056795][ T22] ret_from_fork+0x10/0x18 [ 154.058619][ T22] [ 154.059193][ T22] Allocated by task 22: [ 154.059891][ T22] kasan_save_stack+0x28/0x60 [ 154.061032][ T22] __kasan_slab_alloc+0xb0/0x110 [ 154.061927][ T22] kmem_cache_alloc+0x1cc/0x340 [ 154.062681][ T22] getname_kernel+0x30/0x150 [ 154.063646][ T22] kern_path_locked+0x2c/0x10c [ 154.064409][ T22] handle_remove+0x38/0x284 [ 154.065096][ T22] devtmpfsd+0x8c/0xd0 [ 154.065826][ T22] kthread+0x150/0x15c [ 154.066537][ T22] ret_from_fork+0x10/0x18 [ 154.068794][ T22] [ 154.069898][ T22] Freed by task 22: [ 154.071801][ T22] kasan_save_stack+0x28/0x60 [ 154.073659][ T22] kasan_set_track+0x28/0x3c [ 154.075958][ T22] kasan_set_free_info+0x20/0x30 [ 154.077079][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 154.079224][ T22] __kasan_slab_free+0x10/0x1c [ 154.081601][ T22] slab_free_freelist_hook+0xc4/0x20c [ 154.084346][ T22] kmem_cache_free+0x9c/0x420 [ 154.086644][ T22] putname.part.0+0x68/0x7c [ 154.088710][ T22] kern_path_locked+0x64/0x10c [ 154.091196][ T22] handle_remove+0x38/0x284 [ 154.093509][ T22] devtmpfsd+0x8c/0xd0 [ 154.094860][ T22] kthread+0x150/0x15c [ 154.096986][ T22] ret_from_fork+0x10/0x18 [ 154.099276][ T22] [ 154.100597][ T22] The buggy address belongs to the object at ffff000002981040 [ 154.100597][ T22] which belongs to the cache names_cache of size 4096 [ 154.106690][ T22] The buggy address is located 32 bytes inside of [ 154.106690][ T22] 4096-byte region [ffff000002981040, ffff000002982040) [ 154.109038][ T22] The buggy address belongs to the page: [ 154.110247][ T22] page:000000004e879582 refcount:1 mapcount:0 mapping:0000000000000000 index:0xfdff0000029830c0 pfn:0x42980 [ 154.112664][ T22] head:000000004e879582 order:3 compound_mapcount:0 compound_pincount:0 [ 154.114146][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 154.116239][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f8ff000002837700 [ 154.117592][ T22] raw: fdff0000029830c0 0000000080070006 00000001ffffffff 0000000000000000 [ 154.118630][ T22] page dumped because: kasan: bad access detected [ 154.119388][ T22] [ 154.119839][ T22] Memory state around the buggy address: [ 154.120876][ T22] ffff000002980e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.122111][ T22] ffff000002980f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.123200][ T22] >ffff000002981000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.124119][ T22] ^ [ 154.125321][ T22] ffff000002981100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.126320][ T22] ffff000002981200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.127318][ T22] ================================================================== [ 154.128240][ T22] Disabling lock debugging due to kernel taint executing program [ 155.527756][ T117] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 155.660167][ T117] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 156.288420][ T117] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 174.105523][ T3313] can: request_module (can-proto-0) failed. [ 174.267680][ T3313] can: request_module (can-proto-0) failed. [ 174.387565][ T3313] can: request_module (can-proto-0) failed. executing program executing program executing program [ 182.695161][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 182.708926][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 182.728449][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 182.744919][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 18:31:42 Registers: info registers vcpu 0 PC=ffff80001111e718 X00=ffff80001111e710 X01=0000000000000000 X02=0000000000000000 X03=ffff800011e00a80 X04=ffff80001269b780 X05=f3ff0000029a0000 X06=0000000000000000 X07=00000000ffffffc8 X08=ffff80001269b8f0 X09=ffff80001269b8f0 X10=00000000ffffe000 X11=ffff8000122ed118 X12=ffff80001269b5e0 X13=000000000000030c X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306178302f6366 X18=00000000fffffffd X19=ffff80001231f0c8 X20=ffff80001231f0c0 X21=0000000000000000 X22=0000000000000004 X23=ffff80001231f0c8 X24=0000000000000028 X25=ffff800011e00a80 X26=0000000000000000 X27=0000000000000016 X28=f3ff0000029a0000 X29=ffff80001269b5d0 X30=138b80001013e9e0 SP=ffff80001269b5d0 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=0000000000000000:3feab564c17f5c15 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:41450b3000000000 Z04=0000000000000000:3ff0000000000000 Z05=0000000000000000:3fd3333333333333 Z06=0000004000001010:0000004000001010 Z07=0000000000000000:3ff17305b5cbbf39 Z08=0000000000000000:3fbf3afb06f5b468 Z09=0000000000000000:3fe2ecd3d9fb1211 Z10=0000000000000000:3fe0000000000000 Z11=0000000000000000:726c6dff40f7c441 Z12=0000000000000000:e228ea0bedfd6ded Z13=0000000000000000:2ae10da9ca6ae464 Z14=0000000000000000:8ae054ff42cce379 Z15=0000000000000000:300d6def3d60f2d2 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=0000000000000008:000000005a5a6511 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=0000000000023180 X00=000000000035d503 X01=0000000000000000 X02=0000000000c78a60 X03=0000000000034528 X04=0000000000000005 X05=0000000000000005 X06=000000000035d503 X07=0000000000000016 X08=0000000001405008 X09=0000000000000016 X10=0000000000000056 X11=000f32fdc0000000 X12=00000002401446a4 X13=000000007fffffff X14=00000000000000fe X15=0000000000000000 X16=00000040002cbe08 X17=0000000000000010 X18=0000000000000000 X19=0000000000000020 X20=0000004000025720 X21=000000400043a400 X22=0000004000444000 X23=0000000000000000 X24=0000000000000000 X25=0000000000000000 X26=000000000049f328 X27=00000000013fb4a0 X28=0000004000001b00 X29=00000040002cbda8 X30=000000000002e08c SP=00000040002cbdb0 PSTATE=80000000 N--- EL0t 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=0000000000000000:3fdbc3424f905015 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:41450b3000000000 Z04=0000000000000000:3ff0000000000000 Z05=0000000000000000:3fd3333333333333 Z06=0000004000001010:0000004000001010 Z07=0000000000000000:3ff17305b5cbbf39 Z08=0000000000000000:3fbf3afb06f5b468 Z09=0000000000000000:3fe2ecd3d9fb1211 Z10=0000000000000000:3fe0000000000000 Z11=0000000000000000:726c6dff40f7c441 Z12=0000000000000000:e228ea0bedfd6ded Z13=0000000000000000:2ae10da9ca6ae464 Z14=0000000000000000:8ae054ff42cce379 Z15=0000000000000000:300d6def3d60f2d2 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=0000000000000008:000000005a5a6511 Z31=0000000000000000:0000000000000000