syzkaller login: [ 107.692752][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 107.712499][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 107.738702][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:38759' (ECDSA) to the list of known hosts. 1970/01/01 00:02:03 fuzzer started 1970/01/01 00:02:06 connecting to host at localhost:46333 1970/01/01 00:02:06 checking machine... 1970/01/01 00:02:06 checking revisions... 1970/01/01 00:02:07 testing simple program... executing program executing program [ 136.052224][ T3329] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 136.090418][ T3329] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 139.256198][ T3329] device hsr_slave_0 entered promiscuous mode [ 139.311312][ T3329] device hsr_slave_1 entered promiscuous mode executing program [ 141.746331][ T3329] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 141.860010][ T3329] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 141.953753][ T3329] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 142.070700][ T3329] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 144.665812][ T3329] 8021q: adding VLAN 0 to HW filter on device bond0 [ 144.828614][ T3491] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 144.848018][ T3491] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 145.883885][ T2271] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 145.895764][ T2271] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 145.984115][ T3491] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 146.016162][ T3491] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 146.110883][ T3491] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 146.253636][ T3491] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 146.465391][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 146.473678][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 146.547056][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 146.555596][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 146.649546][ T3329] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 146.974337][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 146.977992][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 149.549545][ T3491] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 149.598437][ T3491] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 150.620828][ T3491] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 150.641629][ T3491] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 150.649730][ T3491] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 150.655262][ T3491] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 150.704453][ T3329] device veth0_vlan entered promiscuous mode [ 150.921868][ T3329] device veth1_vlan entered promiscuous mode [ 151.355024][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 151.372178][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 151.432724][ T3329] device veth0_macvtap entered promiscuous mode [ 151.568066][ T3329] device veth1_macvtap entered promiscuous mode executing program [ 151.697948][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 151.708834][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 151.945634][ T3665] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 151.971536][ T3665] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 152.088337][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 152.111571][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 152.177883][ T3329] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 152.179082][ T3329] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 152.179977][ T3329] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 152.180943][ T3329] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 153.271501][ T3329] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 154.456415][ T665] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 154.617817][ T665] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program 1970/01/01 00:02:33 building call list... [ 154.779667][ T665] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 154.931570][ T665] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 158.131656][ T665] device hsr_slave_0 left promiscuous mode [ 158.190031][ T665] device hsr_slave_1 left promiscuous mode [ 158.333126][ T665] device veth1_macvtap left promiscuous mode [ 158.335787][ T665] device veth0_macvtap left promiscuous mode [ 158.358884][ T665] device veth1_vlan left promiscuous mode [ 158.361851][ T665] device veth0_vlan left promiscuous mode [ 159.820386][ T22] ================================================================== [ 159.821437][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x9000 [ 159.823090][ T22] Read at addr f2ff0000029820a0 by task kdevtmpfs/22 [ 159.824325][ T22] Pointer tag: [f2], memory tag: [fe] [ 159.825461][ T22] [ 159.826690][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-08747-ga9c9a6f741cd #0 [ 159.829913][ T22] Hardware name: linux,dummy-virt (DT) [ 159.831979][ T22] Call trace: [ 159.833135][ T22] dump_backtrace+0x0/0x1ac [ 159.834838][ T22] show_stack+0x18/0x24 [ 159.836389][ T22] dump_stack_lvl+0x68/0x84 [ 159.838251][ T22] print_address_description+0x7c/0x2b4 [ 159.840299][ T22] kasan_report+0x134/0x380 [ 159.841986][ T22] __do_kernel_fault+0x128/0x1bc [ 159.843834][ T22] do_tag_check_fault+0x74/0x90 [ 159.845501][ T22] do_mem_abort+0x44/0xb4 [ 159.847204][ T22] el1_abort+0x40/0x60 [ 159.848695][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 159.850388][ T22] el1h_64_sync+0x78/0x7c [ 159.851940][ T22] __entry_tramp_text_end+0xdfc/0x9000 [ 159.853037][ T22] d_lookup+0x44/0x70 [ 159.854456][ T22] lookup_dcache+0x24/0x84 [ 159.856026][ T22] __lookup_hash+0x24/0xd0 [ 159.857971][ T22] kern_path_locked+0x90/0x10c [ 159.859778][ T22] handle_remove+0x38/0x284 [ 159.861471][ T22] devtmpfsd+0x8c/0xd0 [ 159.863063][ T22] kthread+0x150/0x15c [ 159.864653][ T22] ret_from_fork+0x10/0x20 [ 159.866418][ T22] [ 159.867703][ T22] Allocated by task 22: [ 159.869256][ T22] kasan_save_stack+0x28/0x60 [ 159.870253][ T22] __kasan_slab_alloc+0xb0/0x110 [ 159.871950][ T22] kmem_cache_alloc+0x1cc/0x340 [ 159.873650][ T22] getname_kernel+0x30/0x150 [ 159.875264][ T22] kern_path_locked+0x2c/0x10c [ 159.875979][ T22] handle_remove+0x38/0x284 [ 159.876652][ T22] devtmpfsd+0x8c/0xd0 [ 159.877276][ T22] kthread+0x150/0x15c [ 159.877927][ T22] ret_from_fork+0x10/0x20 [ 159.878718][ T22] [ 159.879706][ T22] Freed by task 22: [ 159.881196][ T22] kasan_save_stack+0x28/0x60 [ 159.883433][ T22] kasan_set_track+0x28/0x3c [ 159.885133][ T22] kasan_set_free_info+0x20/0x30 [ 159.887104][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 159.889289][ T22] __kasan_slab_free+0x10/0x1c [ 159.891074][ T22] slab_free_freelist_hook+0xc4/0x20c [ 159.892916][ T22] kmem_cache_free+0x9c/0x420 [ 159.894605][ T22] putname.part.0+0x68/0x7c [ 159.896245][ T22] kern_path_locked+0x64/0x10c [ 159.900339][ T22] handle_remove+0x38/0x284 [ 159.900991][ T22] devtmpfsd+0x8c/0xd0 [ 159.901598][ T22] kthread+0x150/0x15c [ 159.902188][ T22] ret_from_fork+0x10/0x20 [ 159.902908][ T22] [ 159.903343][ T22] The buggy address belongs to the object at ffff000002982080 [ 159.903343][ T22] which belongs to the cache names_cache of size 4096 [ 159.904713][ T22] The buggy address is located 32 bytes inside of [ 159.904713][ T22] 4096-byte region [ffff000002982080, ffff000002983080) [ 159.905995][ T22] The buggy address belongs to the page: [ 159.909854][ T22] page:00000000e5ba9c83 refcount:1 mapcount:0 mapping:0000000000000000 index:0xfbff000002980000 pfn:0x42980 [ 159.911289][ T22] head:00000000e5ba9c83 order:3 compound_mapcount:0 compound_pincount:0 [ 159.912232][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 159.913877][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f4ff000002837700 [ 159.914923][ T22] raw: fbff000002980000 0000000080070005 00000001ffffffff 0000000000000000 [ 159.915890][ T22] page dumped because: kasan: bad access detected [ 159.919623][ T22] [ 159.920151][ T22] Memory state around the buggy address: [ 159.920995][ T22] ffff000002981e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.921930][ T22] ffff000002981f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.922891][ T22] >ffff000002982000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.923801][ T22] ^ [ 159.924660][ T22] ffff000002982100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.925546][ T22] ffff000002982200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.926366][ T22] ================================================================== [ 159.937316][ T22] Disabling lock debugging due to kernel taint executing program [ 161.155005][ T665] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 161.282084][ T665] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 161.840042][ T665] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 181.284092][ T3318] can: request_module (can-proto-0) failed. [ 181.562365][ T3318] can: request_module (can-proto-0) failed. executing program [ 181.762126][ T3318] can: request_module (can-proto-0) failed. executing program executing program [ 188.099924][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 188.112437][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 188.123838][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 188.135585][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 22:55:02 Registers: info registers vcpu 0 PC=ffff8000107805b4 X00=fcff000002bf5080 X01=0000000000000002 X02=ffff8000125b5018 X03=0000000000000018 X04=fcff000002bf5080 X05=000000000000006f X06=382e39353120205b X07=205b5d3532333432 X08=726f6d656d202c5d X09=5b203a6761742079 X10=676174207265746e X11=202c5d32665b203a X12=5b5d353233343238 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303978302f6366 X18=00000000fffffffd X19=ffff800012429961 X20=ffff8000107805b4 X21=fcff000002bf5080 X22=ffff800012429983 X23=0000000000000f01 X24=000000000000003b X25=ffff8000121eff90 X26=0000000000000000 X27=ffff800012429948 X28=ffff80001221d030 X29=ffff80001267b5c0 X30=0ff38000107805dc SP=ffff80001267b5c0 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=0000000000000000:412eff6000000000 Z02=0000000000000000:4002cc320d656e6f 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=0000000000000010:0000001c78b90da0 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800011777aac X00=00000000000000e0 X01=ffff00007fbd8960 X02=00000000000065ef X03=0000000000000000 X04=0000000000007638 X05=00ffffffffffffff X06=0000000255c8dae1 X07=000000000000000c X08=faff0000028eea48 X09=c24158f0fb2ea532 X10=932e089dd4aef317 X11=ffff800011ded7d8 X12=0000000000000000 X13=0000000000000000 X14=00000000000002f4 X15=0000b00f126fe944 X16=0000000000000001 X17=ffff800011315f84 X18=00000000fffffffd X19=0000000000000001 X20=ffff8000121f0010 X21=ffff8000121eff90 X22=ffff8000121d03e8 X23=ffff8000121f0054 X24=0000000000000000 X25=0000000000000000 X26=faff0000028edb80 X27=0000000000000000 X28=0000000000000000 X29=ffff800012643df0 X30=edc6800011777ac8 SP=ffff800012643df0 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=0000000000000000:412eff6000000000 Z02=0000000000000000:4002cc320d656e6f 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=0000000000000010:0000001c78b90da0 Z31=0000000000000000:0000000000000000