syzkaller login: [ 88.064222][ T2046] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 88.076167][ T2046] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 88.085126][ T2046] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:62861' (ECDSA) to the list of known hosts. 1970/01/01 00:01:51 fuzzer started 1970/01/01 00:01:54 connecting to host at localhost:37103 1970/01/01 00:01:55 checking machine... 1970/01/01 00:01:55 checking revisions... 1970/01/01 00:01:56 testing simple program... executing program executing program [ 124.207432][ T2208] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 124.255520][ T2208] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 127.215632][ T2208] device hsr_slave_0 entered promiscuous mode [ 127.265838][ T2208] device hsr_slave_1 entered promiscuous mode executing program [ 129.733783][ T2208] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 129.866796][ T2208] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 129.974755][ T2208] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 130.115418][ T2208] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 132.492576][ T2208] 8021q: adding VLAN 0 to HW filter on device bond0 [ 132.630431][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 132.660205][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 133.753317][ T1145] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready executing program [ 133.798389][ T1145] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 133.888535][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 133.899479][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 134.037673][ T1002] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 134.092154][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 134.277916][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 134.289941][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 134.340634][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 134.359214][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 134.465655][ T2208] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 134.688769][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 134.691003][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 137.186368][ T2529] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 137.234107][ T2529] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 138.403474][ T1002] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 138.415100][ T1002] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 138.461165][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 138.473742][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 138.517530][ T2208] device veth0_vlan entered promiscuous mode [ 138.651949][ T2208] device veth1_vlan entered promiscuous mode [ 138.966061][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 138.974666][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 139.033118][ T2208] device veth0_macvtap entered promiscuous mode [ 139.103980][ T2208] device veth1_macvtap entered promiscuous mode [ 139.351117][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 139.362326][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 139.373907][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 139.389142][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 139.469894][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 139.493473][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 139.564274][ T2208] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 139.569827][ T2208] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 139.574386][ T2208] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 139.581445][ T2208] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 140.403654][ T2208] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 141.185531][ T10] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 141.365884][ T10] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:20 building call list... [ 141.521848][ T10] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 141.674235][ T10] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 144.543218][ T10] device hsr_slave_0 left promiscuous mode [ 144.600311][ T10] device hsr_slave_1 left promiscuous mode [ 144.729792][ T10] device veth1_macvtap left promiscuous mode [ 144.731024][ T10] device veth0_macvtap left promiscuous mode [ 144.732178][ T10] device veth1_vlan left promiscuous mode [ 144.733208][ T10] device veth0_vlan left promiscuous mode executing program [ 145.977043][ T22] ================================================================== [ 145.977966][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xd000 [ 145.979430][ T22] Read at addr f0ff0000029830e0 by task kdevtmpfs/22 [ 145.980250][ T22] Pointer tag: [f0], memory tag: [fe] [ 145.980890][ T22] [ 145.982101][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-10499-g0f4b9289bad3 #0 [ 145.983527][ T22] Hardware name: linux,dummy-virt (DT) [ 145.984385][ T22] Call trace: [ 145.984862][ T22] dump_backtrace+0x0/0x1ac [ 145.985539][ T22] show_stack+0x18/0x24 [ 145.986198][ T22] dump_stack_lvl+0x68/0x84 [ 145.987020][ T22] print_address_description+0x7c/0x2b4 [ 145.987711][ T22] kasan_report+0x134/0x380 [ 145.988316][ T22] __do_kernel_fault+0x128/0x1bc [ 145.989026][ T22] do_tag_check_fault+0x74/0x90 [ 145.989662][ T22] do_mem_abort+0x44/0xb4 [ 145.990284][ T22] el1_abort+0x40/0x60 [ 145.990870][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 145.991517][ T22] el1h_64_sync+0x78/0x7c [ 145.992114][ T22] __entry_tramp_text_end+0xdfc/0xd000 [ 145.992797][ T22] d_lookup+0x44/0x70 [ 145.993375][ T22] lookup_dcache+0x24/0x84 [ 145.993981][ T22] __lookup_hash+0x24/0xd0 [ 145.994612][ T22] kern_path_locked+0x90/0x10c [ 145.995234][ T22] handle_remove+0x38/0x284 [ 145.995850][ T22] devtmpfsd+0x8c/0xd0 [ 145.996463][ T22] kthread+0x150/0x15c [ 145.997248][ T22] ret_from_fork+0x10/0x20 [ 145.998083][ T22] [ 145.998597][ T22] Allocated by task 22: [ 145.999243][ T22] kasan_save_stack+0x28/0x60 [ 146.000023][ T22] __kasan_slab_alloc+0xb0/0x110 [ 146.000677][ T22] kmem_cache_alloc+0x194/0x2f4 [ 146.001306][ T22] getname_kernel+0x30/0x150 [ 146.001928][ T22] kern_path_locked+0x2c/0x10c [ 146.002579][ T22] handle_remove+0x38/0x284 [ 146.003180][ T22] devtmpfsd+0x8c/0xd0 [ 146.003763][ T22] kthread+0x150/0x15c [ 146.004337][ T22] ret_from_fork+0x10/0x20 [ 146.006029][ T22] [ 146.006528][ T22] Freed by task 22: [ 146.007167][ T22] kasan_save_stack+0x28/0x60 [ 146.007789][ T22] kasan_set_track+0x28/0x3c [ 146.008395][ T22] kasan_set_free_info+0x20/0x30 [ 146.009037][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 146.009765][ T22] __kasan_slab_free+0x10/0x1c [ 146.010410][ T22] slab_free_freelist_hook+0xc4/0x20c [ 146.011076][ T22] kmem_cache_free+0x9c/0x3d4 [ 146.011706][ T22] putname.part.0+0x68/0x7c [ 146.012312][ T22] kern_path_locked+0x64/0x10c [ 146.012936][ T22] handle_remove+0x38/0x284 [ 146.013534][ T22] devtmpfsd+0x8c/0xd0 [ 146.014137][ T22] kthread+0x150/0x15c [ 146.014728][ T22] ret_from_fork+0x10/0x20 [ 146.015359][ T22] [ 146.015755][ T22] The buggy address belongs to the object at ffff0000029830c0 [ 146.015755][ T22] which belongs to the cache names_cache of size 4096 [ 146.019601][ T22] The buggy address is located 32 bytes inside of [ 146.019601][ T22] 4096-byte region [ffff0000029830c0, ffff0000029840c0) [ 146.023296][ T22] The buggy address belongs to the page: [ 146.024079][ T22] page:00000000195970c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf0ff000002986180 pfn:0x42980 [ 146.025316][ T22] head:00000000195970c8 order:3 compound_mapcount:0 compound_pincount:0 [ 146.026192][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 146.027775][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f6ff000002837700 [ 146.028678][ T22] raw: f0ff000002986180 0000000080070006 00000001ffffffff 0000000000000000 [ 146.029544][ T22] page dumped because: kasan: bad access detected [ 146.030233][ T22] [ 146.030639][ T22] Memory state around the buggy address: [ 146.031375][ T22] ffff000002982e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 146.032202][ T22] ffff000002982f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 146.032976][ T22] >ffff000002983000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 146.033724][ T22] ^ [ 146.034553][ T22] ffff000002983100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 146.035306][ T22] ffff000002983200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 146.036102][ T22] ================================================================== [ 146.037079][ T22] Disabling lock debugging due to kernel taint [ 147.175512][ T10] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 147.306991][ T10] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 147.889795][ T10] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 164.518475][ T2202] can: request_module (can-proto-0) failed. [ 164.759759][ T2202] can: request_module (can-proto-0) failed. [ 164.928896][ T2202] can: request_module (can-proto-0) failed. executing program executing program [ 172.133881][ T2046] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 172.153350][ T2046] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 172.164175][ T2046] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 172.175556][ T2046] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program executing program VM DIAGNOSIS: 23:40:44 Registers: info registers vcpu 0 PC=ffff8000105e8124 X00=ffff800011e54ce0 X01=0000000000000000 X02=0000000000000000 X03=ffff800011e54ce0 X04=ffff8000126ab6f0 X05=f2ff0000029a0000 X06=0000000000000000 X07=00000000ffffffc8 X08=ffff8000126ab830 X09=ffff8000126ab830 X10=00000000ffffe000 X11=ffff8000122fd240 X12=ffff8000126ab610 X13=000000000000030a X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306478302f6366 X18=00000000fffffffd X19=ffff80001232f208 X20=ffff80001232f200 X21=0000000000000000 X22=0000000000000004 X23=ffff80001232f208 X24=0000000000000028 X25=ffff800011e54ce0 X26=0000000000000016 X27=0000000000000000 X28=f2ff0000029a0000 X29=ffff8000126ab540 X30=dcf780001013d5d0 SP=ffff8000126ab540 PSTATE=604000c9 -ZC- 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=d629656a92873b59:9dea745c8ecc3750 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=0000000000000010:00000019e65d3b50 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff80001014e82c X00=fcff0000052c9400 X01=00000000000056d2 X02=0000000000045de2 X03=ffff800011dff11c X04=0000000000000001 X05=0000000000000060 X06=ffff800011c1a61a X07=ffff800011c1a61a X08=ffff800011dfeec8 X09=ffff800011dff238 X10=000000000000000a X11=0000000000000000 X12=fdff0000077105f6 X13=fdff000007711000 X14=0000000000000000 X15=0000000000000030 X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=fdff0000053ea090 X20=fcff0000052c9400 X21=ffff80001286bd28 X22=ffff80001286bd00 X23=0000000000000000 X24=fdff0000053ea0b8 X25=fdff0000053ea0c8 X26=00000000000056d0 X27=ffff8000117e27b0 X28=0000000000000000 X29=ffff80001286bc60 X30=7e968000102f2234 SP=ffff80001286bc60 PSTATE=20400009 --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=0000000000000000:0000000000000003 Z01=0000000000000000:41301fc800000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:0000000000000000 Z04=0000000000000000:0000040000000000 Z05=0000000000000000:4010040140100401 Z06=0000000000000000:0000040000000000 Z07=0000000000000000:3ff0260e6ab9b5ff Z08=0000000000000000:3fc0d833f28dfa8c Z09=0000000000000000:3fe2a73e7dfaa2ab Z10=0000000000000000:3fe0000000000000 Z11=0000000000000000:c1619199b5bcdd16 Z12=0000000000000000:38bbc657be0b112a Z13=0000000000000000:54f562fccb3868b4 Z14=0000000000000000:17f34b83077108d3 Z15=0000000000000000:632c7316fd8e4f27 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=0000000000000000:00000000a8d84be7 Z31=0000000000000000:0000000000000000