syzkaller login: [ 102.055441][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 102.076868][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 102.082945][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:14071' (ECDSA) to the list of known hosts. 1970/01/01 00:02:05 fuzzer started 1970/01/01 00:02:08 connecting to host at localhost:37673 1970/01/01 00:02:08 checking machine... 1970/01/01 00:02:08 checking revisions... 1970/01/01 00:02:10 testing simple program... executing program executing program [ 138.344158][ T3326] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 138.389500][ T3326] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 141.224055][ T3326] device hsr_slave_0 entered promiscuous mode [ 141.271565][ T3326] device hsr_slave_1 entered promiscuous mode executing program [ 143.520194][ T3326] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 143.615602][ T3326] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 143.740460][ T3326] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 143.868053][ T3326] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 146.431227][ T3326] 8021q: adding VLAN 0 to HW filter on device bond0 [ 146.637038][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 146.659585][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 148.213645][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 148.273507][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 148.461781][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 148.484056][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 148.688168][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 148.779217][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 149.072397][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 149.148347][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 149.293829][ T3643] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 149.331332][ T3643] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 149.420272][ T3326] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 149.844234][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 149.849435][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 153.405160][ T3643] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 153.428991][ T3643] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 155.233866][ T3644] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 155.257466][ T3644] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 155.294350][ T3644] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 155.323051][ T3644] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 155.344807][ T3326] device veth0_vlan entered promiscuous mode [ 155.509132][ T3326] device veth1_vlan entered promiscuous mode [ 156.082668][ T3643] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 156.148191][ T3643] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 156.209022][ T3326] device veth0_macvtap entered promiscuous mode [ 156.239019][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 156.279402][ T3326] device veth1_macvtap entered promiscuous mode [ 156.584661][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 156.608449][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 156.743352][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 156.764395][ T3500] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 156.951470][ T3326] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 156.954854][ T3326] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 156.973232][ T3326] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 156.974480][ T3326] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 158.042880][ T3326] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation 1970/01/01 00:02:37 building call list... [ 159.213913][ T30] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.395118][ T30] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.554536][ T30] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.722626][ T30] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 162.772303][ T30] device hsr_slave_0 left promiscuous mode [ 162.830474][ T30] device hsr_slave_1 left promiscuous mode [ 163.021250][ T30] device veth1_macvtap left promiscuous mode [ 163.022656][ T30] device veth0_macvtap left promiscuous mode [ 163.024090][ T30] device veth1_vlan left promiscuous mode [ 163.025328][ T30] device veth0_vlan left promiscuous mode executing program [ 164.741231][ T22] ================================================================== [ 164.742247][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xa000 [ 164.743859][ T22] Read at addr fbff0000029820a0 by task kdevtmpfs/22 [ 164.744818][ T22] Pointer tag: [fb], memory tag: [fe] [ 164.747372][ T22] [ 164.749110][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-06779-g477f70cd2a67 #0 [ 164.752820][ T22] Hardware name: linux,dummy-virt (DT) [ 164.755348][ T22] Call trace: [ 164.757363][ T22] dump_backtrace+0x0/0x1b0 [ 164.760088][ T22] show_stack+0x18/0x24 [ 164.762314][ T22] dump_stack_lvl+0x68/0x84 [ 164.763629][ T22] print_address_description+0x7c/0x2b4 [ 164.764701][ T22] kasan_report+0x134/0x380 [ 164.765628][ T22] __do_kernel_fault+0x1a8/0x1dc [ 164.766907][ T22] do_tag_check_fault+0x74/0x90 [ 164.767986][ T22] do_mem_abort+0x44/0xb4 [ 164.768919][ T22] el1_abort+0x40/0x60 [ 164.769787][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 164.770809][ T22] el1h_64_sync+0x78/0x7c [ 164.771763][ T22] __entry_tramp_text_end+0xdfc/0xa000 [ 164.772831][ T22] d_lookup+0x44/0x70 [ 164.773695][ T22] lookup_dcache+0x24/0x84 [ 164.774607][ T22] __lookup_hash+0x24/0xd0 [ 164.775569][ T22] kern_path_locked+0x90/0x10c [ 164.776900][ T22] handle_remove+0x38/0x284 [ 164.777890][ T22] devtmpfsd+0x8c/0xd0 [ 164.778787][ T22] kthread+0x150/0x15c [ 164.779805][ T22] ret_from_fork+0x10/0x18 [ 164.780944][ T22] [ 164.781619][ T22] Allocated by task 22: [ 164.782544][ T22] kasan_save_stack+0x28/0x60 [ 164.783485][ T22] __kasan_slab_alloc+0xb0/0x110 [ 164.784206][ T22] kmem_cache_alloc+0x1cc/0x340 [ 164.784881][ T22] getname_kernel+0x30/0x150 [ 164.785579][ T22] kern_path_locked+0x2c/0x10c [ 164.786394][ T22] handle_remove+0x38/0x284 [ 164.787113][ T22] devtmpfsd+0x8c/0xd0 [ 164.787763][ T22] kthread+0x150/0x15c [ 164.788407][ T22] ret_from_fork+0x10/0x18 [ 164.789158][ T22] [ 164.789662][ T22] Freed by task 22: [ 164.790279][ T22] kasan_save_stack+0x28/0x60 [ 164.790968][ T22] kasan_set_track+0x28/0x3c [ 164.791648][ T22] kasan_set_free_info+0x20/0x30 [ 164.792334][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 164.793112][ T22] __kasan_slab_free+0x10/0x1c [ 164.793776][ T22] slab_free_freelist_hook+0xc4/0x20c [ 164.794508][ T22] kmem_cache_free+0x9c/0x420 [ 164.795242][ T22] putname.part.0+0x68/0x7c [ 164.796144][ T22] kern_path_locked+0x64/0x10c [ 164.796855][ T22] handle_remove+0x38/0x284 [ 164.797569][ T22] devtmpfsd+0x8c/0xd0 [ 164.798249][ T22] kthread+0x150/0x15c [ 164.798918][ T22] ret_from_fork+0x10/0x18 [ 164.799675][ T22] [ 164.800149][ T22] The buggy address belongs to the object at ffff000002982080 [ 164.800149][ T22] which belongs to the cache names_cache of size 4096 [ 164.801608][ T22] The buggy address is located 32 bytes inside of [ 164.801608][ T22] 4096-byte region [ffff000002982080, ffff000002983080) [ 164.802943][ T22] The buggy address belongs to the page: [ 164.803817][ T22] page:0000000071d5d7eb refcount:1 mapcount:0 mapping:0000000000000000 index:0xf7ff000002984100 pfn:0x42980 [ 164.805247][ T22] head:0000000071d5d7eb order:3 compound_mapcount:0 compound_pincount:0 [ 164.806530][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 164.808218][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f1ff000002837700 [ 164.809255][ T22] raw: f7ff000002984100 0000000080070002 00000001ffffffff 0000000000000000 [ 164.810297][ T22] page dumped because: kasan: bad access detected [ 164.811092][ T22] [ 164.811567][ T22] Memory state around the buggy address: [ 164.812467][ T22] ffff000002981e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 164.813392][ T22] ffff000002981f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 164.814678][ T22] >ffff000002982000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 164.815634][ T22] ^ [ 164.818894][ T22] ffff000002982100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 164.820579][ T22] ffff000002982200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 164.821535][ T22] ================================================================== [ 164.822433][ T22] Disabling lock debugging due to kernel taint [ 166.014468][ T30] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 166.149123][ T30] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 166.703536][ T30] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 186.911593][ T3321] can: request_module (can-proto-0) failed. executing program [ 187.237339][ T3321] can: request_module (can-proto-0) failed. [ 187.420606][ T3321] can: request_module (can-proto-0) failed. executing program [ 191.313424][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 191.332218][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 191.343652][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program [ 193.211234][ T3164] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 19:42:58 Registers: info registers vcpu 0 PC=ffff80001077ede4 X00=f6ff000002b71080 X01=0000000000000003 X02=0000000000000000 X03=ffff80001235e6e8 X04=f6ff000002b71080 X05=000000000000005b X06=372e34363120205b X07=205b5d3831383434 X08=726f6d656d202c5d X09=5b203a6761742079 X10=676174207265746e X11=202c5d62665b203a X12=5b5d383138343437 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306178302f6366 X18=00000000fffffffd X19=ffff8000124489ad X20=ffff80001077ede4 X21=f6ff000002b71080 X22=ffff8000124489c3 X23=0000000000000f01 X24=000000000000003b X25=ffff80001220ff90 X26=ffff80001235e718 X27=ffff800012448988 X28=ffff8000124487d8 X29=ffff80001269b590 X30=ffff80001077ee0c SP=ffff80001269b590 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=0000000000000000:3fd03a607c2f64f9 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:416312d000000000 Z04=0000000000000000:0000040000000000 Z05=0000000000000000:4010040140100401 Z06=0000000000000000:0000040000000000 Z07=0000000000000000:3ff0c0df448bfe47 Z08=0000000000000000:3fbd17c330665448 Z09=0000000000000000:3fe307a47bc7f0f5 Z10=0000000000000000:3fe0000000000000 Z11=0000000000000000:213e470bcb4027aa Z12=0000000000000000:f8d9fe56a74244ba Z13=0000000000000000:6e5991a885c67281 Z14=0000000000000000:d9516b088520d035 Z15=0000000000000000:063429924cb728db 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=0000000000000000:000000004461ab70 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff80001111dfe8 X00=ffff80001111dfe0 X01=ffff80001111e020 X02=0000000000000000 X03=ffff80006d9e6000 X04=ffff00007fbd8840 X05=ffff800012663c61 X06=0000000268623279 X07=000000000000000c X08=fcff0000028ef988 X09=ed803ca10c0dc096 X10=da41e3d6436770a7 X11=ffff800011de9270 X12=0000000000000000 X13=00000000000002c0 X14=00000000000002c0 X15=0000000000004000 X16=ffff80001000c000 X17=ffff80006d9e6000 X18=00000000fffffffd X19=ffff80001248b8c0 X20=0000000000007b88 X21=00000025f38e9e00 X22=0000000000000000 X23=ffff8000125e000c X24=ffff8000121ef678 X25=0000000000000000 X26=fcff0000028eeac0 X27=0000000000000000 X28=fcff0000028eeac0 X29=ffff80001000bef0 X30=d19780001111e038 SP=ffff80001000bef0 PSTATE=004000c9 ---- 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=0000000000000000:3f83fde7471057aa Z01=0000000000000000:3f847ae147ae147b Z02=0000000000000000:41a408db84fa8ac1 Z03=0000000000000000:413a454000000000 Z04=0000000000000000:3ff041e9d8098aba Z05=0000000000000000:3fe150a07cdfe241 Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3fc6c265b4ae60dc Z09=0000000000000000:3fe57c98d97ba4e7 Z10=0000000000000000:3fe0000000000000 Z11=0000000000000000:213e470bcb4027aa Z12=0000000000000000:f8d9fe56a74244ba Z13=0000000000000000:6e5991a885c67281 Z14=0000000000000000:d9516b088520d035 Z15=0000000000000000:063429924cb728db 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=0000000000000004:00000000ae213519 Z31=0000000000000000:0000000000000000