syzkaller login: [ 93.885141][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 93.892987][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 93.912418][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:12671' (ECDSA) to the list of known hosts. 1970/01/01 00:01:52 fuzzer started 1970/01/01 00:01:55 connecting to host at localhost:44629 1970/01/01 00:01:55 checking machine... 1970/01/01 00:01:55 checking revisions... 1970/01/01 00:01:57 testing simple program... executing program executing program [ 124.357388][ T3333] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 124.393626][ T3333] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 126.835364][ T3333] device hsr_slave_0 entered promiscuous mode [ 126.910964][ T3333] device hsr_slave_1 entered promiscuous mode [ 128.812469][ T3333] netdevsim netdevsim0 netdevsim0: renamed from eth0 executing program [ 128.900707][ T3333] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 129.009108][ T3333] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 129.095080][ T3333] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 131.088547][ T3333] 8021q: adding VLAN 0 to HW filter on device bond0 [ 131.219487][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 131.232901][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 132.190060][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 132.223599][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 132.313474][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 132.324572][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 132.402665][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 132.479527][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 132.681553][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 132.694896][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 132.780425][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 132.791993][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 132.863795][ T3333] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 133.083011][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 133.085085][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 135.448507][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 135.458327][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 136.592384][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 136.611210][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 136.639873][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 136.654348][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 136.701561][ T3333] device veth0_vlan entered promiscuous mode [ 136.851902][ T3333] device veth1_vlan entered promiscuous mode [ 137.247687][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 137.268469][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 137.324850][ T3333] device veth0_macvtap entered promiscuous mode [ 137.392009][ T3333] device veth1_macvtap entered promiscuous mode [ 137.597638][ T3670] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 137.612277][ T3670] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 137.667988][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 137.682086][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 137.763878][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 137.780262][ T3570] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 137.871441][ T3333] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 137.873021][ T3333] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 137.874161][ T3333] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 137.875383][ T3333] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 138.683920][ T3333] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation 1970/01/01 00:02:18 building call list... [ 139.654342][ T717] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 139.836968][ T717] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 139.998638][ T717] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 140.159988][ T717] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 143.384915][ T717] device hsr_slave_0 left promiscuous mode [ 143.440014][ T717] device hsr_slave_1 left promiscuous mode [ 143.609062][ T717] device veth1_macvtap left promiscuous mode [ 143.610360][ T717] device veth0_macvtap left promiscuous mode [ 143.622018][ T717] device veth1_vlan left promiscuous mode [ 143.623407][ T717] device veth0_vlan left promiscuous mode executing program [ 145.183972][ T22] ================================================================== [ 145.185370][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xd000 [ 145.187069][ T22] Read at addr f3ff000002a030e0 by task kdevtmpfs/22 [ 145.188198][ T22] Pointer tag: [f3], memory tag: [fe] [ 145.190019][ T22] [ 145.191197][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-10155-g626bf91a292e #0 [ 145.192415][ T22] Hardware name: linux,dummy-virt (DT) [ 145.193436][ T22] Call trace: [ 145.194025][ T22] dump_backtrace+0x0/0x1ac [ 145.195050][ T22] show_stack+0x18/0x24 [ 145.195575][ T22] dump_stack_lvl+0x68/0x84 [ 145.196622][ T22] print_address_description+0x7c/0x2b4 [ 145.197166][ T22] kasan_report+0x134/0x380 [ 145.197907][ T22] __do_kernel_fault+0x128/0x1bc [ 145.198817][ T22] do_tag_check_fault+0x74/0x90 [ 145.217298][ T22] do_mem_abort+0x44/0xb4 [ 145.218345][ T22] el1_abort+0x40/0x60 [ 145.219013][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 145.219858][ T22] el1h_64_sync+0x78/0x7c [ 145.220679][ T22] __entry_tramp_text_end+0xdfc/0xd000 [ 145.221385][ T22] d_lookup+0x44/0x70 [ 145.222011][ T22] lookup_dcache+0x24/0x84 [ 145.222644][ T22] __lookup_hash+0x24/0xd0 [ 145.223325][ T22] kern_path_locked+0x90/0x10c [ 145.223992][ T22] handle_remove+0x38/0x284 [ 145.224662][ T22] devtmpfsd+0x8c/0xd0 [ 145.225267][ T22] kthread+0x150/0x15c [ 145.226138][ T22] ret_from_fork+0x10/0x20 [ 145.227336][ T22] [ 145.228044][ T22] Allocated by task 22: [ 145.228985][ T22] kasan_save_stack+0x28/0x60 [ 145.230035][ T22] __kasan_slab_alloc+0xb0/0x110 [ 145.230940][ T22] kmem_cache_alloc+0x1cc/0x340 [ 145.231769][ T22] getname_kernel+0x30/0x150 [ 145.232670][ T22] kern_path_locked+0x2c/0x10c [ 145.233635][ T22] handle_remove+0x38/0x284 [ 145.234590][ T22] devtmpfsd+0x8c/0xd0 [ 145.235494][ T22] kthread+0x150/0x15c [ 145.236193][ T22] ret_from_fork+0x10/0x20 [ 145.237056][ T22] [ 145.237690][ T22] Freed by task 22: [ 145.238397][ T22] kasan_save_stack+0x28/0x60 [ 145.239419][ T22] kasan_set_track+0x28/0x3c [ 145.240348][ T22] kasan_set_free_info+0x20/0x30 [ 145.241361][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 145.242351][ T22] __kasan_slab_free+0x10/0x1c [ 145.243311][ T22] slab_free_freelist_hook+0xc4/0x20c [ 145.244188][ T22] kmem_cache_free+0x9c/0x420 [ 145.245201][ T22] putname.part.0+0x68/0x7c [ 145.246109][ T22] kern_path_locked+0x64/0x10c [ 145.246962][ T22] handle_remove+0x38/0x284 [ 145.247848][ T22] devtmpfsd+0x8c/0xd0 [ 145.248580][ T22] kthread+0x150/0x15c [ 145.249436][ T22] ret_from_fork+0x10/0x20 [ 145.250372][ T22] [ 145.250980][ T22] The buggy address belongs to the object at ffff000002a030c0 [ 145.250980][ T22] which belongs to the cache names_cache of size 4096 [ 145.253035][ T22] The buggy address is located 32 bytes inside of [ 145.253035][ T22] 4096-byte region [ffff000002a030c0, ffff000002a040c0) [ 145.254994][ T22] The buggy address belongs to the page: [ 145.256146][ T22] page:000000007378900b refcount:1 mapcount:0 mapping:0000000000000000 index:0xf5ff000002a02080 pfn:0x42a00 [ 145.258054][ T22] head:000000007378900b order:3 compound_mapcount:0 compound_pincount:0 [ 145.259311][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 145.261363][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f1ff000002837700 [ 145.262599][ T22] raw: f5ff000002a02080 0000000080070001 00000001ffffffff 0000000000000000 [ 145.264029][ T22] page dumped because: kasan: bad access detected [ 145.265176][ T22] [ 145.265775][ T22] Memory state around the buggy address: [ 145.266995][ T22] ffff000002a02e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 145.268217][ T22] ffff000002a02f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 145.269390][ T22] >ffff000002a03000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 145.270755][ T22] ^ [ 145.272110][ T22] ffff000002a03100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 145.273421][ T22] ffff000002a03200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 145.274653][ T22] ================================================================== [ 145.275881][ T22] Disabling lock debugging due to kernel taint [ 146.394631][ T717] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 146.544534][ T717] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 147.165245][ T717] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 165.924316][ T3325] can: request_module (can-proto-0) failed. [ 166.212161][ T3325] can: request_module (can-proto-0) failed. [ 166.414594][ T3325] can: request_module (can-proto-0) failed. executing program executing program [ 172.507337][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 172.512911][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 172.524568][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 172.533886][ T3171] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 21:54:43 Registers: info registers vcpu 0 PC=ffff80001078073c X00=ffff8000125e5000 X01=0000000000000002 X02=0000000000000000 X03=0000000000000018 X04=f6ff000002a5d880 X05=0000000000000066 X06=312e35343120205b X07=205b5d3839313838 X08=726f6d656d202c5d X09=5b203a6761742079 X10=676174207265746e X11=202c5d33665b203a X12=5b5d383931383831 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306478302f6366 X18=00000000fffffffd X19=ffff800012459980 X20=ffff800010780714 X21=f6ff000002a5d880 X22=ffff800012459983 X23=0000000000000f01 X24=000000000000003b X25=ffff80001221ff90 X26=0000000000000000 X27=ffff800012459948 X28=ffff80001224d0f0 X29=ffff8000126ab5c0 X30=ffff80001078073c SP=ffff8000126ab5c0 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=cb7a572f8fbc4382:b04c3562a629b25d 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=0000000000000010:00000019fba7f720 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000102f00cc X00=f8ff00000496b090 X01=0000000000006d25 X02=0000000000000069 X03=ffff800011dfea0b X04=0000000000000001 X05=000000000000006c X06=ffff800011c2c4b7 X07=ffff800011c2c4b7 X08=ffff800011dfe8e0 X09=ffff800011dfec50 X10=000000000000000a X11=0000000000000000 X12=f3ff000009364bbe X13=f3ff000009365000 X14=0000000000000000 X15=0000000000000030 X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=f3ff000009365000 X20=f3ff000009364bee X21=ffff800012833c50 X22=ffff8000118e7498 X23=00000000ffffffd8 X24=0000000000000000 X25=0000000000000010 X26=ffff800011e16ad2 X27=ffff800011e16ad2 X28=f3ff000009364bee X29=ffff800012833a60 X30=5bcf8000105fcbcc SP=ffff800012833ad0 PSTATE=80400009 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=cb7a572f8fbc4382:b04c3562a629b25d 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=0000000000000010:00000019fba7f720 Z31=0000000000000000:0000000000000000