syzkaller login: [ 95.038748][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 95.086244][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 95.115762][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:43242' (ECDSA) to the list of known hosts. 1970/01/01 00:01:48 fuzzer started 1970/01/01 00:01:51 connecting to host at localhost:34923 1970/01/01 00:01:51 checking machine... 1970/01/01 00:01:51 checking revisions... 1970/01/01 00:01:52 testing simple program... executing program executing program [ 119.181265][ T3333] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 119.225416][ T3333] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 121.631384][ T3333] device hsr_slave_0 entered promiscuous mode [ 121.708346][ T3333] device hsr_slave_1 entered promiscuous mode [ 123.649669][ T3333] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 123.727555][ T3333] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 123.804218][ T3333] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 123.881322][ T3333] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 125.824230][ T3333] 8021q: adding VLAN 0 to HW filter on device bond0 [ 125.956824][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 125.973374][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 126.873750][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 126.887776][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready executing program [ 126.957207][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 126.970584][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 127.036027][ T2272] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 127.111062][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 127.293497][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 127.301323][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 127.364322][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 127.373379][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 127.427371][ T3333] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 127.617584][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 127.619798][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 129.643986][ T2272] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 129.653492][ T2272] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 130.511064][ T2272] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 130.519165][ T2272] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 130.546517][ T2272] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 130.552074][ T2272] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 130.594183][ T3333] device veth0_vlan entered promiscuous mode [ 130.717140][ T3333] device veth1_vlan entered promiscuous mode [ 131.098579][ T3582] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 131.111035][ T3582] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 131.149060][ T3333] device veth0_macvtap entered promiscuous mode [ 131.234415][ T3333] device veth1_macvtap entered promiscuous mode [ 131.453410][ T3582] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 131.470065][ T3582] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 131.479502][ T3582] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 131.485496][ T3582] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 131.555764][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 131.571315][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 131.644173][ T3333] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 131.646900][ T3333] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 131.648013][ T3333] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 131.649205][ T3333] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 132.381843][ T3333] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation executing program [ 133.189798][ T646] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:12 building call list... [ 133.414004][ T646] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 133.607652][ T646] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 133.782846][ T646] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 136.802578][ T646] device hsr_slave_0 left promiscuous mode [ 136.856882][ T646] device hsr_slave_1 left promiscuous mode [ 136.966235][ T646] device veth1_macvtap left promiscuous mode [ 136.967429][ T646] device veth0_macvtap left promiscuous mode [ 136.968852][ T646] device veth1_vlan left promiscuous mode [ 136.969976][ T646] device veth0_vlan left promiscuous mode [ 138.288571][ T22] ================================================================== [ 138.289608][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xe000 [ 138.291142][ T22] Read at addr f6ff000002a330e0 by task kdevtmpfs/22 [ 138.292264][ T22] Pointer tag: [f6], memory tag: [fe] [ 138.294171][ T22] [ 138.295254][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-10318-gac08b1c68d1b #0 [ 138.296780][ T22] Hardware name: linux,dummy-virt (DT) [ 138.298164][ T22] Call trace: [ 138.298868][ T22] dump_backtrace+0x0/0x1ac [ 138.299721][ T22] show_stack+0x18/0x24 [ 138.300488][ T22] dump_stack_lvl+0x68/0x84 [ 138.301315][ T22] print_address_description+0x7c/0x2b4 [ 138.302233][ T22] kasan_report+0x134/0x380 [ 138.303150][ T22] __do_kernel_fault+0x128/0x1bc [ 138.304124][ T22] do_tag_check_fault+0x74/0x90 [ 138.304979][ T22] do_mem_abort+0x44/0xb4 [ 138.305929][ T22] el1_abort+0x40/0x60 [ 138.306826][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 138.307823][ T22] el1h_64_sync+0x78/0x7c [ 138.308710][ T22] __entry_tramp_text_end+0xdfc/0xe000 [ 138.309790][ T22] d_lookup+0x44/0x70 [ 138.310666][ T22] lookup_dcache+0x24/0x84 [ 138.311600][ T22] __lookup_hash+0x24/0xd0 [ 138.312510][ T22] kern_path_locked+0x90/0x10c [ 138.313476][ T22] handle_remove+0x38/0x284 [ 138.314405][ T22] devtmpfsd+0x8c/0xd0 [ 138.315235][ T22] kthread+0x150/0x15c [ 138.316203][ T22] ret_from_fork+0x10/0x20 [ 138.317420][ T22] [ 138.318129][ T22] Allocated by task 22: [ 138.319147][ T22] kasan_save_stack+0x28/0x60 [ 138.320275][ T22] __kasan_slab_alloc+0xb0/0x110 [ 138.321190][ T22] kmem_cache_alloc+0x1cc/0x340 [ 138.322147][ T22] getname_kernel+0x30/0x150 [ 138.323054][ T22] kern_path_locked+0x2c/0x10c [ 138.324100][ T22] handle_remove+0x38/0x284 [ 138.324912][ T22] devtmpfsd+0x8c/0xd0 [ 138.325928][ T22] kthread+0x150/0x15c [ 138.326800][ T22] ret_from_fork+0x10/0x20 [ 138.327800][ T22] [ 138.328430][ T22] Freed by task 22: [ 138.329144][ T22] kasan_save_stack+0x28/0x60 [ 138.330118][ T22] kasan_set_track+0x28/0x3c [ 138.331128][ T22] kasan_set_free_info+0x20/0x30 [ 138.332119][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 138.333202][ T22] __kasan_slab_free+0x10/0x1c [ 138.334101][ T22] slab_free_freelist_hook+0xc4/0x20c [ 138.335011][ T22] kmem_cache_free+0x9c/0x420 [ 138.335948][ T22] putname.part.0+0x68/0x7c [ 138.336982][ T22] kern_path_locked+0x64/0x10c [ 138.337808][ T22] handle_remove+0x38/0x284 [ 138.338489][ T22] devtmpfsd+0x8c/0xd0 [ 138.340313][ T22] kthread+0x150/0x15c [ 138.340953][ T22] ret_from_fork+0x10/0x20 [ 138.341620][ T22] [ 138.342015][ T22] The buggy address belongs to the object at ffff000002a330c0 [ 138.342015][ T22] which belongs to the cache names_cache of size 4096 [ 138.343330][ T22] The buggy address is located 32 bytes inside of [ 138.343330][ T22] 4096-byte region [ffff000002a330c0, ffff000002a340c0) [ 138.344882][ T22] The buggy address belongs to the page: [ 138.345932][ T22] page:00000000dd339e40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42a30 [ 138.347513][ T22] head:00000000dd339e40 order:3 compound_mapcount:0 compound_pincount:0 [ 138.348658][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 138.350731][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f4ff000002837700 [ 138.352583][ T22] raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000 [ 138.354001][ T22] page dumped because: kasan: bad access detected [ 138.355330][ T22] [ 138.355945][ T22] Memory state around the buggy address: [ 138.357240][ T22] ffff000002a32e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 138.358346][ T22] ffff000002a32f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 138.359567][ T22] >ffff000002a33000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 138.360723][ T22] ^ [ 138.362261][ T22] ffff000002a33100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 138.363523][ T22] ffff000002a33200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 138.364389][ T22] ================================================================== [ 138.365221][ T22] Disabling lock debugging due to kernel taint executing program [ 139.446449][ T646] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 139.582227][ T646] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 140.168768][ T646] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 157.930919][ T3325] can: request_module (can-proto-0) failed. [ 158.147179][ T3325] can: request_module (can-proto-0) failed. [ 158.281812][ T3325] can: request_module (can-proto-0) failed. executing program executing program executing program [ 166.782118][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 166.793543][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 166.800091][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 166.805716][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 02:37:49 Registers: info registers vcpu 0 PC=ffff800010016680 X00=0000000000000000 X01=ffff00007b6fcb10 X02=ffff00007b6fcb18 X03=0000000000000000 X04=ffff80001224c810 X05=0000000000000001 X06=0000000002ccd834 X07=0000000000000004 X08=0000000000000000 X09=0000000000000001 X10=ffff800012220040 X11=ffff800011e0fb08 X12=0000000000000000 X13=000000000000019e X14=000000000000019e X15=0000b3f342252028 X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=f4ff00000524db80 X20=ffff00007b6fc000 X21=ffff00007fbc1ac0 X22=ffff00007b6fc000 X23=70d78000117880f4 X24=ffff00007b6fc638 X25=ffff80001244c000 X26=0000000000000000 X27=0000000000000000 X28=ffff00007b6fc000 X29=ffff80001283bc50 X30=ffff800010016638 SP=ffff80001283bc50 PSTATE=404000c9 -Z-- 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=0000000000000000:4128ace000000000 Z02=0000000000000000:3fd2755fdec4b472 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=0000000000000010:00000018fbe8f370 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000105f7440 X00=ffff8000126ab423 X01=0000000000000001 X02=0000000000003031 X03=ffff8000118e77a8 X04=0000000000000000 X05=0000000000000064 X06=000000000000005b X07=80000000ffffe30a X08=000000000000008a X09=ffff8000126ab520 X10=000000000000005b X11=ffff800012301b10 X12=ffff8000126ab619 X13=ffff8000926ab617 X14=ffffffffffffffff X15=0000000000000000 X16=6478302b646e655f X17=30306578302f6366 X18=0000000000000005 X19=000000000000008a X20=0000000000000000 X21=0000000000000000 X22=000000000000000a X23=0000000000000000 X24=0000000000000000 X25=0000000000000000 X26=ffff8000126ab420 X27=ffff800011e1159d X28=ffff8000126ab619 X29=ffff8000126ab3c0 X30=ffff8000105f7440 SP=ffff8000126ab3c0 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=0000000000000000:4128ace000000000 Z02=0000000000000000:3fd2755fdec4b472 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=0000000000000010:00000018fbe8f370 Z31=0000000000000000:0000000000000000