syzkaller login: [ 101.168482][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 101.177154][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 101.202789][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:38182' (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:43259 1970/01/01 00:02:02 checking machine... 1970/01/01 00:02:02 checking revisions... 1970/01/01 00:02:04 testing simple program... executing program executing program [ 132.033722][ T3324] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 132.081854][ T3324] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 135.006478][ T3324] device hsr_slave_0 entered promiscuous mode [ 135.049698][ T3324] device hsr_slave_1 entered promiscuous mode executing program [ 137.402789][ T3324] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 137.516223][ T3324] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 137.615334][ T3324] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 137.715787][ T3324] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 139.843339][ T3324] 8021q: adding VLAN 0 to HW filter on device bond0 [ 139.976903][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 139.993861][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 141.130174][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 141.152553][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 141.235033][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 141.242738][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 141.321709][ T2930] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 141.393812][ T3498] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 141.632600][ T3498] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 141.656966][ T3498] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 141.740504][ T3498] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 141.751120][ T3498] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 141.826459][ T3324] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 142.156914][ T2930] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 142.159505][ T2930] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 144.375590][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 144.381011][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 145.541970][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 145.566600][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 145.577135][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 145.583828][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 145.631373][ T3324] device veth0_vlan entered promiscuous mode [ 145.817466][ T3324] device veth1_vlan entered promiscuous mode [ 146.222071][ T3498] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 146.235937][ T3498] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 146.311146][ T3324] device veth0_macvtap entered promiscuous mode [ 146.391024][ T3324] device veth1_macvtap entered promiscuous mode [ 146.561025][ T3498] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 146.571161][ T3498] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 146.668195][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 146.718259][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 146.863982][ T3498] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 146.888031][ T3498] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 146.997999][ T3324] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 147.001512][ T3324] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 147.003672][ T3324] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 147.055877][ T3324] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 147.897028][ T3324] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation executing program [ 148.793912][ T26] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 148.938271][ T26] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:27 building call list... [ 149.085093][ T26] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 149.246741][ T26] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 152.202953][ T26] device hsr_slave_0 left promiscuous mode [ 152.268573][ T26] device hsr_slave_1 left promiscuous mode [ 152.436933][ T26] device veth1_macvtap left promiscuous mode [ 152.438098][ T26] device veth0_macvtap left promiscuous mode [ 152.440458][ T26] device veth1_vlan left promiscuous mode [ 152.441606][ T26] device veth0_vlan left promiscuous mode [ 153.948468][ T22] ================================================================== [ 153.949487][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xa000 [ 153.951175][ T22] Read at addr f3ff0000029830e0 by task kdevtmpfs/22 [ 153.952144][ T22] Pointer tag: [f3], memory tag: [fe] [ 153.953502][ T22] [ 153.954839][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-05424-g835d31d319d9 #0 [ 153.956372][ T22] Hardware name: linux,dummy-virt (DT) [ 153.957379][ T22] Call trace: [ 153.957918][ T22] dump_backtrace+0x0/0x1b0 [ 153.958689][ T22] show_stack+0x18/0x24 [ 153.959390][ T22] dump_stack_lvl+0x68/0x84 [ 153.960084][ T22] print_address_description+0x7c/0x2b4 [ 153.960930][ T22] kasan_report+0x134/0x380 [ 153.961713][ T22] __do_kernel_fault+0x1a8/0x1dc [ 153.962831][ T22] do_tag_check_fault+0x74/0x90 [ 153.963807][ T22] do_mem_abort+0x44/0xb4 [ 153.964812][ T22] el1_abort+0x40/0x60 [ 153.966756][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 153.969466][ T22] el1h_64_sync+0x78/0x7c [ 153.971651][ T22] __entry_tramp_text_end+0xdfc/0xa000 [ 153.973896][ T22] d_lookup+0x44/0x70 [ 153.974732][ T22] lookup_dcache+0x24/0x84 [ 153.976295][ T22] __lookup_hash+0x24/0xd0 [ 153.978540][ T22] kern_path_locked+0x90/0x10c [ 153.980901][ T22] handle_remove+0x38/0x284 [ 153.983159][ T22] devtmpfsd+0x8c/0xd0 [ 153.985490][ T22] kthread+0x150/0x15c [ 153.987434][ T22] ret_from_fork+0x10/0x18 [ 153.989763][ T22] [ 153.991045][ T22] Allocated by task 22: [ 153.993029][ T22] kasan_save_stack+0x28/0x60 [ 153.995432][ T22] __kasan_slab_alloc+0xb0/0x110 [ 153.997593][ T22] kmem_cache_alloc+0x1cc/0x340 [ 154.000081][ T22] getname_kernel+0x30/0x150 [ 154.001930][ T22] kern_path_locked+0x2c/0x10c [ 154.003683][ T22] handle_remove+0x38/0x284 [ 154.005998][ T22] devtmpfsd+0x8c/0xd0 [ 154.007584][ T22] kthread+0x150/0x15c [ 154.008282][ T22] ret_from_fork+0x10/0x18 [ 154.010391][ T22] [ 154.010988][ T22] Freed by task 22: [ 154.011756][ T22] kasan_save_stack+0x28/0x60 [ 154.012617][ T22] kasan_set_track+0x28/0x3c [ 154.014136][ T22] kasan_set_free_info+0x20/0x30 [ 154.015139][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 154.016145][ T22] __kasan_slab_free+0x10/0x1c [ 154.018175][ T22] slab_free_freelist_hook+0xc4/0x20c [ 154.020981][ T22] kmem_cache_free+0x9c/0x420 [ 154.023473][ T22] putname.part.0+0x68/0x7c [ 154.025696][ T22] kern_path_locked+0x64/0x10c [ 154.027337][ T22] handle_remove+0x38/0x284 [ 154.029503][ T22] devtmpfsd+0x8c/0xd0 [ 154.031636][ T22] kthread+0x150/0x15c [ 154.032620][ T22] ret_from_fork+0x10/0x18 [ 154.033691][ T22] [ 154.034576][ T22] The buggy address belongs to the object at ffff0000029830c0 [ 154.034576][ T22] which belongs to the cache names_cache of size 4096 [ 154.038424][ T22] The buggy address is located 32 bytes inside of [ 154.038424][ T22] 4096-byte region [ffff0000029830c0, ffff0000029840c0) [ 154.040218][ T22] The buggy address belongs to the page: [ 154.041782][ T22] page:000000006fb7f761 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42980 [ 154.044620][ T22] head:000000006fb7f761 order:3 compound_mapcount:0 compound_pincount:0 [ 154.045694][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 154.047387][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f2ff000002837700 [ 154.048527][ T22] raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000 [ 154.049590][ T22] page dumped because: kasan: bad access detected [ 154.050450][ T22] [ 154.051034][ T22] Memory state around the buggy address: [ 154.051993][ T22] ffff000002982e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.053018][ T22] ffff000002982f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.053973][ T22] >ffff000002983000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.055112][ T22] ^ [ 154.056500][ T22] ffff000002983100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.057933][ T22] ffff000002983200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 154.061451][ T22] ================================================================== [ 154.066746][ T22] Disabling lock debugging due to kernel taint executing program [ 155.153782][ T26] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 155.290161][ T26] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 156.037516][ T26] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program [ 171.291948][ T3313] can: request_module (can-proto-0) failed. [ 171.570046][ T3313] can: request_module (can-proto-0) failed. [ 171.749835][ T3313] can: request_module (can-proto-0) failed. executing program executing program executing program executing program [ 182.772045][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 182.807272][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 182.812831][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 182.826476][ T3162] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 18:31:42 Registers: info registers vcpu 0 PC=ffff80001077fddc X00=ffff8000125d5000 X01=0000000000000002 X02=0000000000000000 X03=0000000000000018 X04=faff000002bff880 X05=000000000000000a X06=392e33353120205b X07=205b5d3434313235 X08=726f6d656d202c5d X09=5b203a6761742079 X10=676174207265746e X11=202c5d33665b203a X12=5b5d343431323539 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306178302f6366 X18=00000000fffffffd X19=ffff8000124489c3 X20=ffff80001077fdb4 X21=faff000002bff880 X22=ffff8000124489c3 X23=0000000000000f01 X24=000000000000003b X25=ffff80001220ff90 X26=ffff80001235e718 X27=ffff800012448988 X28=ffff8000124487d8 X29=ffff80001269b590 X30=ffff80001077fddc SP=ffff80001269b590 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=0000000000000000:0000000000000000 Z01=0000000000000000:c1162e42fefa39ef Z02=1dcb11969a553fa0:489171ac7cfa82fd 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=0000000000000010:0000001b8e6dfe20 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff80001111e718 X00=ffff80001111e710 X01=00000000ffffc5fd X02=00000000ffffc676 X03=0000000000000003 X04=ffff00007fbd7ac0 X05=00000000ffffc676 X06=000000000265c8b3 X07=000000000000000f X08=00000000ffffffff X09=ffff800011dd6f98 X10=0000000000000020 X11=0000000000000000 X12=f0ff000009c045c9 X13=f0ff000009c05000 X14=0000000000000000 X15=0000000000004000 X16=ffff80001000c000 X17=ffff80006d9ea000 X18=0000000000000000 X19=ffff80001231f0c8 X20=ffff80001231f0c0 X21=0000000000000000 X22=0000000000000004 X23=ffff80001231f0c8 X24=0000000000000028 X25=0000000000000001 X26=ffff80001012d420 X27=0000000000000000 X28=0000000000000001 X29=ffff80001000bce0 X30=5ee280001013e9e0 SP=ffff80001000bce0 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=0000000000000000:3fc8dc30db51d106 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3fbe4ea47e324b1b Z03=0000000000000000:411cec8000000000 Z04=0000000000000000:3fead0932544ed25 Z05=0000000000000000:3fd73abfe42373e4 Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3fef41f31a06fef0 Z08=0000000000000000:3fb4716865edd988 Z09=0000000000000000:3fe3c2633f72229e 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=0000000000000010:0000001b8e6dfe20 Z31=0000000000000000:0000000000000000