syzkaller login: [ 62.712795][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 62.727268][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 64.835638][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:15487' (ECDSA) to the list of known hosts. 1970/01/01 00:01:09 fuzzer started 1970/01/01 00:01:11 connecting to host at localhost:35225 1970/01/01 00:01:11 checking machine... 1970/01/01 00:01:11 checking revisions... 1970/01/01 00:01:12 testing simple program... executing program [ 76.510240][ T3328] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.539185][ T3328] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 78.146554][ T3328] device hsr_slave_0 entered promiscuous mode [ 78.219015][ T3328] device hsr_slave_1 entered promiscuous mode [ 79.598571][ T3328] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 79.676909][ T3328] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 79.734760][ T3328] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 79.833980][ T3328] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 80.979516][ T3328] 8021q: adding VLAN 0 to HW filter on device bond0 [ 81.067687][ T3624] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 81.085732][ T3624] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 81.706174][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 81.724747][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 81.769384][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 81.777374][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 81.843418][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 81.890379][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 82.025012][ T3624] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 82.036059][ T3624] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 82.090549][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 82.099448][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 82.144946][ T3328] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 82.379402][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 82.382792][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 83.837908][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 83.848885][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 84.526808][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 84.539257][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 84.546633][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 84.553688][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 84.589980][ T3328] device veth0_vlan entered promiscuous mode [ 84.684073][ T3328] device veth1_vlan entered promiscuous mode [ 84.841720][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 84.846916][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 84.880305][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 84.887957][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 84.923166][ T3328] device veth0_macvtap entered promiscuous mode [ 84.964306][ T3328] device veth1_macvtap entered promiscuous mode [ 85.120667][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 85.128684][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 85.138919][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 85.148366][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 85.189848][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 85.199581][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 85.242016][ T3328] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 85.242935][ T3328] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 85.243610][ T3328] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 85.244272][ T3328] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 85.691832][ T3328] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 86.281611][ T10] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:01:25 building call list... [ 86.412226][ T10] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 86.509638][ T10] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 86.750609][ T10] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 89.397314][ T10] device hsr_slave_0 left promiscuous mode [ 89.463546][ T10] device hsr_slave_1 left promiscuous mode [ 89.568093][ T10] device veth1_macvtap left promiscuous mode [ 89.569456][ T10] device veth0_macvtap left promiscuous mode [ 89.575077][ T10] device veth1_vlan left promiscuous mode [ 89.576371][ T10] device veth0_vlan left promiscuous mode executing program [ 90.466054][ T22] ================================================================== [ 90.467137][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x5000 [ 90.468809][ T22] Read at addr f2ff000002981060 by task kdevtmpfs/22 [ 90.469760][ T22] Pointer tag: [f2], memory tag: [fe] [ 90.471341][ T22] [ 90.473408][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-09687-g27151f177827 #0 [ 90.474648][ T22] Hardware name: linux,dummy-virt (DT) [ 90.475674][ T22] Call trace: [ 90.476255][ T22] dump_backtrace+0x0/0x1ac [ 90.477101][ T22] show_stack+0x18/0x24 [ 90.477845][ T22] dump_stack_lvl+0x68/0x84 [ 90.478642][ T22] print_address_description+0x7c/0x2b4 [ 90.479501][ T22] kasan_report+0x134/0x380 [ 90.480261][ T22] __do_kernel_fault+0x128/0x1bc [ 90.481475][ T22] do_tag_check_fault+0x74/0x90 [ 90.482155][ T22] do_mem_abort+0x44/0xb4 [ 90.483025][ T22] el1_abort+0x40/0x60 [ 90.483843][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 90.484653][ T22] el1h_64_sync+0x78/0x7c [ 90.485487][ T22] __entry_tramp_text_end+0xdfc/0x5000 [ 90.487209][ T22] d_lookup+0x44/0x70 [ 90.488519][ T22] lookup_dcache+0x24/0x84 [ 90.489782][ T22] __lookup_hash+0x24/0xd0 [ 90.490872][ T22] kern_path_locked+0x90/0x10c [ 90.491722][ T22] handle_remove+0x38/0x284 [ 90.492833][ T22] devtmpfsd+0x8c/0xd0 [ 90.493687][ T22] kthread+0x150/0x15c [ 90.494644][ T22] ret_from_fork+0x10/0x20 [ 90.495639][ T22] [ 90.496143][ T22] Allocated by task 22: [ 90.496714][ T22] kasan_save_stack+0x28/0x60 [ 90.497517][ T22] __kasan_slab_alloc+0xb0/0x110 [ 90.498242][ T22] kmem_cache_alloc+0x1cc/0x340 [ 90.498938][ T22] getname_kernel+0x30/0x150 [ 90.499528][ T22] kern_path_locked+0x2c/0x10c [ 90.500114][ T22] handle_remove+0x38/0x284 [ 90.500708][ T22] devtmpfsd+0x8c/0xd0 [ 90.501305][ T22] kthread+0x150/0x15c [ 90.502250][ T22] ret_from_fork+0x10/0x20 [ 90.503345][ T22] [ 90.504024][ T22] Freed by task 22: [ 90.504789][ T22] kasan_save_stack+0x28/0x60 [ 90.505483][ T22] kasan_set_track+0x28/0x3c [ 90.506002][ T22] kasan_set_free_info+0x20/0x30 [ 90.506776][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 90.507496][ T22] __kasan_slab_free+0x10/0x1c [ 90.508106][ T22] slab_free_freelist_hook+0xc4/0x20c [ 90.508688][ T22] kmem_cache_free+0x9c/0x420 [ 90.509328][ T22] putname.part.0+0x68/0x7c [ 90.509863][ T22] kern_path_locked+0x64/0x10c [ 90.510481][ T22] handle_remove+0x38/0x284 [ 90.511732][ T22] devtmpfsd+0x8c/0xd0 [ 90.512866][ T22] kthread+0x150/0x15c [ 90.513751][ T22] ret_from_fork+0x10/0x20 [ 90.514445][ T22] [ 90.514805][ T22] The buggy address belongs to the object at ffff000002981040 [ 90.514805][ T22] which belongs to the cache names_cache of size 4096 [ 90.516217][ T22] The buggy address is located 32 bytes inside of [ 90.516217][ T22] 4096-byte region [ffff000002981040, ffff000002982040) [ 90.517658][ T22] The buggy address belongs to the page: [ 90.518570][ T22] page:0000000048ec8ef1 refcount:1 mapcount:0 mapping:0000000000000000 index:0xfaff000002985140 pfn:0x42980 [ 90.519817][ T22] head:0000000048ec8ef1 order:3 compound_mapcount:0 compound_pincount:0 [ 90.520700][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 90.522858][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f9ff000002837700 [ 90.524552][ T22] raw: faff000002985140 0000000080070004 00000001ffffffff 0000000000000000 [ 90.525634][ T22] page dumped because: kasan: bad access detected [ 90.526450][ T22] [ 90.526773][ T22] Memory state around the buggy address: [ 90.527582][ T22] ffff000002980e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 90.528437][ T22] ffff000002980f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 90.529242][ T22] >ffff000002981000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 90.530451][ T22] ^ [ 90.531705][ T22] ffff000002981100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 90.532936][ T22] ffff000002981200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 90.534266][ T22] ================================================================== [ 90.535245][ T22] Disabling lock debugging due to kernel taint [ 91.425787][ T10] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 91.629998][ T10] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 92.227208][ T10] bond0 (unregistering): Released all slaves executing program executing program executing program executing program [ 102.542482][ T3324] can: request_module (can-proto-0) failed. [ 102.733372][ T3324] can: request_module (can-proto-0) failed. [ 102.818132][ T3324] can: request_module (can-proto-0) failed. executing program executing program executing program [ 113.169360][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 113.176916][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 113.180599][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 113.188031][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 09:39:31 Registers: info registers vcpu 0 PC=ffff80001077ff40 X00=f8ff000002b8c080 X01=0000000000000002 X02=ffff8000125b5018 X03=0000000000000018 X04=f8ff000002b8c080 X05=0000000000000034 X06=342e30392020205b X07=205b5d3134333137 X08=000000000000005d X09=ffff80001267b520 X10=000000000000005d X11=ffff8000122d1ae8 X12=5b5d313433313734 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303578302f6366 X18=00000000fffffffd X19=ffff800012429954 X20=ffff8000107804d4 X21=f8ff000002b8c080 X22=ffff800012429960 X23=0000000000000f01 X24=0000000000000018 X25=ffff8000121eff90 X26=0000000000000000 X27=ffff800012429948 X28=ffff80001221d0b0 X29=ffff80001267b5d0 X30=fcec8000107804fc SP=ffff80001267b5d0 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=0000000000000000:3fdc444541d1a2d4 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:4178e0d2bb31680c Z03=0000000000000000:4110eac000000000 Z04=0000000000000000:3fefd9e58dd2582e Z05=0000000000000000:3fe0a6b25a9f24fb Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3fc2b35eccd33cb4 Z09=0000000000000000:3fe593dd2b2cc4b3 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=0000000000000000:00000010125a72f0 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff80001001cc6c X00=0000000000000011 X01=ffff80001177a480 X02=ffff800012643e00 X03=ffff8000100d2b70 X04=0000000000000030 X05=0000000000000001 X06=0000000000000001 X07=0000000000000001 X08=ffff80001000bb04 X09=00000000059aea44 X10=00000000000001e4 X11=0000000000000001 X12=0000000000000001 X13=0000000000000000 X14=00000000000001e4 X15=00000b0fbf93b246 X16=ffff80001000c000 X17=ffff80006da06000 X18=00000000fffffffd X19=0000000000000800 X20=f0ff0000065e06e0 X21=fbff000003350a00 X22=ffff80001000bad0 X23=000000000000000b X24=ffff800012529620 X25=ffff00007a800000 X26=000000ff00010200 X27=fbff000003350a00 X28=f0ff0000065e06e0 X29=ffff80001000bcf0 X30=3faa800010286988 SP=ffff80001000bd40 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=0000000000000000:0000000000000000 Z01=0000000000000000:c1162e42fefa39ef Z02=f90e5b880df26801:3fe94acfdd142673 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=0000000000000010:00000010125a72f0 Z31=0000000000000000:0000000000000000