syzkaller login: [ 56.800054][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 60.317452][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 61.831882][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:49400' (ECDSA) to the list of known hosts. 1970/01/01 00:01:14 fuzzer started 1970/01/01 00:01:17 connecting to host at localhost:35885 1970/01/01 00:01:17 checking machine... 1970/01/01 00:01:17 checking revisions... 1970/01/01 00:01:18 testing simple program... executing program [ 82.347239][ T3330] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 82.377139][ T3330] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 83.937700][ T3330] device hsr_slave_0 entered promiscuous mode [ 83.990306][ T3330] device hsr_slave_1 entered promiscuous mode [ 85.298692][ T3330] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 85.387583][ T3330] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 85.465269][ T3330] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 85.536297][ T3330] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 86.748467][ T3330] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 86.825219][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 86.830615][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 87.464898][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 87.470819][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 87.536115][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 87.551062][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 87.615553][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 87.685435][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 87.879724][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 87.888671][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 87.938793][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 87.950186][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 87.997491][ T3330] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 88.138739][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 88.140232][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 89.594024][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 89.600461][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 90.278101][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 90.289678][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 90.310827][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 90.326189][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 90.351702][ T3330] device veth0_vlan entered promiscuous mode [ 90.470776][ T3330] device veth1_vlan entered promiscuous mode [ 90.720862][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 90.731608][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 90.790865][ T3330] device veth0_macvtap entered promiscuous mode [ 90.859559][ T3330] device veth1_macvtap entered promiscuous mode [ 91.006933][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 91.018056][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 91.028519][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 91.035752][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 91.094321][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 91.107334][ T3101] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 91.155839][ T3330] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 91.157429][ T3330] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 91.158194][ T3330] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 91.158859][ T3330] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 91.699352][ T3330] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 92.360723][ T2150] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:01:32 building call list... [ 92.491808][ T2150] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 92.723962][ T2150] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 92.838178][ T2150] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 95.030290][ T2150] device hsr_slave_0 left promiscuous mode [ 95.085767][ T2150] device hsr_slave_1 left promiscuous mode [ 95.188348][ T2150] device veth1_macvtap left promiscuous mode [ 95.189060][ T2150] device veth0_macvtap left promiscuous mode [ 95.191368][ T2150] device veth1_vlan left promiscuous mode [ 95.195423][ T2150] device veth0_vlan left promiscuous mode executing program [ 95.958784][ T22] ================================================================== [ 95.959823][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x5000 [ 95.961666][ T22] Read at addr fdff000002981060 by task kdevtmpfs/22 [ 95.963326][ T22] Pointer tag: [fd], memory tag: [fe] [ 95.965199][ T22] [ 95.966076][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-09687-g27151f177827 #0 [ 95.967304][ T22] Hardware name: linux,dummy-virt (DT) [ 95.968336][ T22] Call trace: [ 95.968892][ T22] dump_backtrace+0x0/0x1ac [ 95.969671][ T22] show_stack+0x18/0x24 [ 95.970417][ T22] dump_stack_lvl+0x68/0x84 [ 95.971210][ T22] print_address_description+0x7c/0x2b4 [ 95.972039][ T22] kasan_report+0x134/0x380 [ 95.972867][ T22] __do_kernel_fault+0x128/0x1bc [ 95.973765][ T22] do_tag_check_fault+0x74/0x90 [ 95.974498][ T22] do_mem_abort+0x44/0xb4 [ 95.975156][ T22] el1_abort+0x40/0x60 [ 95.975805][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 95.976608][ T22] el1h_64_sync+0x78/0x7c [ 95.977290][ T22] __entry_tramp_text_end+0xdfc/0x5000 [ 95.978057][ T22] d_lookup+0x44/0x70 [ 95.978707][ T22] lookup_dcache+0x24/0x84 [ 95.979407][ T22] __lookup_hash+0x24/0xd0 [ 95.980277][ T22] kern_path_locked+0x90/0x10c [ 95.981223][ T22] handle_remove+0x38/0x284 [ 95.982056][ T22] devtmpfsd+0x8c/0xd0 [ 95.982732][ T22] kthread+0x150/0x15c [ 95.983557][ T22] ret_from_fork+0x10/0x20 [ 95.984708][ T22] [ 95.985403][ T22] Allocated by task 22: [ 95.986340][ T22] kasan_save_stack+0x28/0x60 [ 95.987372][ T22] __kasan_slab_alloc+0xb0/0x110 [ 95.988469][ T22] kmem_cache_alloc+0x1cc/0x340 [ 95.989358][ T22] getname_kernel+0x30/0x150 [ 95.990189][ T22] kern_path_locked+0x2c/0x10c [ 95.991049][ T22] handle_remove+0x38/0x284 [ 95.991965][ T22] devtmpfsd+0x8c/0xd0 [ 95.992861][ T22] kthread+0x150/0x15c [ 95.993520][ T22] ret_from_fork+0x10/0x20 [ 95.994284][ T22] [ 95.994763][ T22] Freed by task 22: [ 95.995344][ T22] kasan_save_stack+0x28/0x60 [ 95.996100][ T22] kasan_set_track+0x28/0x3c [ 95.996812][ T22] kasan_set_free_info+0x20/0x30 [ 95.997514][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 95.998369][ T22] __kasan_slab_free+0x10/0x1c [ 95.999074][ T22] slab_free_freelist_hook+0xc4/0x20c [ 96.000220][ T22] kmem_cache_free+0x9c/0x420 [ 96.001049][ T22] putname.part.0+0x68/0x7c [ 96.002165][ T22] kern_path_locked+0x64/0x10c [ 96.003108][ T22] handle_remove+0x38/0x284 [ 96.004027][ T22] devtmpfsd+0x8c/0xd0 [ 96.004760][ T22] kthread+0x150/0x15c [ 96.005532][ T22] ret_from_fork+0x10/0x20 [ 96.006476][ T22] [ 96.006980][ T22] The buggy address belongs to the object at ffff000002981040 [ 96.006980][ T22] which belongs to the cache names_cache of size 4096 [ 96.008993][ T22] The buggy address is located 32 bytes inside of [ 96.008993][ T22] 4096-byte region [ffff000002981040, ffff000002982040) [ 96.011043][ T22] The buggy address belongs to the page: [ 96.012174][ T22] page:000000002664e514 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf9ff000002980000 pfn:0x42980 [ 96.014026][ T22] head:000000002664e514 order:3 compound_mapcount:0 compound_pincount:0 [ 96.015562][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 96.017700][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f2ff000002837700 [ 96.018987][ T22] raw: f9ff000002980000 0000000080070006 00000001ffffffff 0000000000000000 [ 96.020399][ T22] page dumped because: kasan: bad access detected [ 96.021421][ T22] [ 96.022134][ T22] Memory state around the buggy address: [ 96.023309][ T22] ffff000002980e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 96.024536][ T22] ffff000002980f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 96.025820][ T22] >ffff000002981000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 96.027084][ T22] ^ [ 96.028294][ T22] ffff000002981100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 96.029661][ T22] ffff000002981200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 96.031293][ T22] ================================================================== [ 96.032572][ T22] Disabling lock debugging due to kernel taint [ 96.911726][ T2150] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 97.041299][ T2150] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 97.591198][ T2150] bond0 (unregistering): Released all slaves executing program executing program executing program [ 107.250599][ T3323] can: request_module (can-proto-0) failed. [ 107.419712][ T3323] can: request_module (can-proto-0) failed. [ 107.559211][ T3323] can: request_module (can-proto-0) failed. executing program executing program executing program [ 116.868992][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 116.874312][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 116.878259][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 116.882663][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 09:39:37 Registers: info registers vcpu 0 PC=ffff800010106190 X00=00000000000000c0 X01=00000000ffffe308 X02=80000000ffffe308 X03=ffff8000122d1aa0 X04=00000000ffffe308 X05=ffff80001267b700 X06=00000000ffffe308 X07=64665b203a676174 X08=726f6d656d202c5d X09=5b203a6761742079 X10=676174207265746e X11=202c5d64665b203a X12=742079726f6d656d X13=5d65665b203a6761 X14=0000000000000001 X15=0000000000000030 X16=6478302b646e655f X17=30303578302f6366 X18=0000000000000000 X19=ffff00007fbbb9e1 X20=0000000000000000 X21=0000000000000023 X22=0000000000000000 X23=ffff800011e07168 X24=00000000000000c0 X25=0000000000000027 X26=0000000000000016 X27=ffff80001267b700 X28=0000000000000000 X29=ffff80001267b630 X30=01e6800010106d34 SP=ffff80001267b630 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=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:4117cc4000000000 Z04=0000000000000000:3ff0000000000000 Z05=0000000000000000:3fd3333333333333 Z06=0000000000000000:5400050000100000 Z07=0000000000000000:0000000000000002 Z08=0000000000000000:000000000000002a 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=0000000000000000:000000005064a947 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800011123a08 X00=ffff800011123a00 X01=0000000000000000 X02=ffff8000121c8000 X03=dead000000000122 X04=ffff8000121ef000 X05=0000000000000000 X06=00000000ffffffff X07=ffff00007fbc2b40 X08=ffff00007fbc2bc0 X09=00000000005b8d80 X10=000000000000004a X11=0000000000000001 X12=0000000000000001 X13=0000000000000001 X14=000000000000004a X15=0000018cd5392c04 X16=ffff80001000c000 X17=ffff80006da06000 X18=00000000fffffffd X19=ffff8000122ff188 X20=ffff8000122ff180 X21=0000000000000000 X22=0000000000000004 X23=ffff8000122ff188 X24=0000000000000028 X25=ffff8000121e6110 X26=f2ff0000028eeac0 X27=0000000000000000 X28=0000000000000000 X29=ffff80001000be30 X30=ebbd80001013db40 SP=ffff80001000be30 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=0000000000000000:0000000000000004 Z01=0000000000000000:41307a4700000000 Z02=0000000000000000:3fd90ec05409c0b7 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=0000000000000010:0000001152d99280 Z31=0000000000000000:0000000000000000