syzkaller login: [ 93.771839][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 93.801251][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 93.830980][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:16034' (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:38963 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 [ 118.761573][ T3330] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 118.802178][ T3330] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 121.174895][ T3330] device hsr_slave_0 entered promiscuous mode [ 121.222294][ T3330] device hsr_slave_1 entered promiscuous mode [ 123.019669][ T3330] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 123.112989][ T3330] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 123.197249][ T3330] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 123.284697][ T3330] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 125.387448][ T3330] 8021q: adding VLAN 0 to HW filter on device bond0 [ 125.521314][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 125.539756][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 126.504268][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 126.523779][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 126.598959][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 126.611822][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 126.697760][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 126.772777][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 126.940229][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 126.945980][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 127.012994][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 127.025290][ T2936] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 127.117900][ T3330] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 127.358977][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 127.360648][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 129.368742][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 129.387262][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 130.113279][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 130.131225][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 130.142538][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 130.151934][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 130.201435][ T3330] device veth0_vlan entered promiscuous mode [ 130.301594][ T3330] device veth1_vlan entered promiscuous mode [ 130.368264][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 130.381957][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 130.560817][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 130.574316][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 130.646006][ T3330] device veth0_macvtap entered promiscuous mode [ 130.710361][ T3330] device veth1_macvtap entered promiscuous mode [ 130.942908][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 130.951544][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 130.972293][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 130.980413][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 131.051573][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 131.060602][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 131.129614][ T3330] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 131.130733][ T3330] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 131.131438][ T3330] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 131.132103][ T3330] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 131.771287][ T3330] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 132.632103][ T182] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 132.814851][ T182] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:12 building call list... [ 132.993653][ T182] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 133.160225][ T182] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 135.903499][ T182] device hsr_slave_0 left promiscuous mode [ 135.968525][ T182] device hsr_slave_1 left promiscuous mode executing program [ 136.078327][ T182] device veth1_macvtap left promiscuous mode [ 136.079451][ T182] device veth0_macvtap left promiscuous mode [ 136.092152][ T182] device veth1_vlan left promiscuous mode [ 136.093441][ T182] device veth0_vlan left promiscuous mode [ 137.550193][ T22] ================================================================== [ 137.551146][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x5000 [ 137.552677][ T22] Read at addr faff000002a330e0 by task kdevtmpfs/22 [ 137.553554][ T22] Pointer tag: [fa], memory tag: [fe] [ 137.554537][ T22] [ 137.555742][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-09721-g0bcfe68b8767 #0 [ 137.557265][ T22] Hardware name: linux,dummy-virt (DT) [ 137.558231][ T22] Call trace: [ 137.558799][ T22] dump_backtrace+0x0/0x1ac [ 137.559579][ T22] show_stack+0x18/0x24 [ 137.560405][ T22] dump_stack_lvl+0x68/0x84 [ 137.561355][ T22] print_address_description+0x7c/0x2b4 [ 137.562357][ T22] kasan_report+0x134/0x380 [ 137.563406][ T22] __do_kernel_fault+0x128/0x1bc [ 137.564324][ T22] do_tag_check_fault+0x74/0x90 [ 137.565265][ T22] do_mem_abort+0x44/0xb4 [ 137.566300][ T22] el1_abort+0x40/0x60 [ 137.567299][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 137.568326][ T22] el1h_64_sync+0x78/0x7c [ 137.569269][ T22] __entry_tramp_text_end+0xdfc/0x5000 [ 137.570396][ T22] d_lookup+0x44/0x70 [ 137.571322][ T22] lookup_dcache+0x24/0x84 [ 137.572312][ T22] __lookup_hash+0x24/0xd0 [ 137.573273][ T22] kern_path_locked+0x90/0x10c [ 137.574702][ T22] handle_remove+0x38/0x284 [ 137.575741][ T22] devtmpfsd+0x8c/0xd0 [ 137.576627][ T22] kthread+0x150/0x15c [ 137.577478][ T22] ret_from_fork+0x10/0x20 [ 137.578832][ T22] [ 137.579498][ T22] Allocated by task 22: [ 137.580372][ T22] kasan_save_stack+0x28/0x60 [ 137.581476][ T22] __kasan_slab_alloc+0xb0/0x110 [ 137.582542][ T22] kmem_cache_alloc+0x1cc/0x340 [ 137.583487][ T22] getname_kernel+0x30/0x150 [ 137.584332][ T22] kern_path_locked+0x2c/0x10c [ 137.585413][ T22] handle_remove+0x38/0x284 [ 137.586283][ T22] devtmpfsd+0x8c/0xd0 [ 137.587106][ T22] kthread+0x150/0x15c [ 137.588146][ T22] ret_from_fork+0x10/0x20 [ 137.589216][ T22] [ 137.589832][ T22] Freed by task 22: [ 137.590573][ T22] kasan_save_stack+0x28/0x60 [ 137.591502][ T22] kasan_set_track+0x28/0x3c [ 137.592417][ T22] kasan_set_free_info+0x20/0x30 [ 137.593325][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 137.594438][ T22] __kasan_slab_free+0x10/0x1c [ 137.595383][ T22] slab_free_freelist_hook+0xc4/0x20c [ 137.596734][ T22] kmem_cache_free+0x9c/0x420 [ 137.597703][ T22] putname.part.0+0x68/0x7c [ 137.598566][ T22] kern_path_locked+0x64/0x10c [ 137.599491][ T22] handle_remove+0x38/0x284 [ 137.600441][ T22] devtmpfsd+0x8c/0xd0 [ 137.601174][ T22] kthread+0x150/0x15c [ 137.602037][ T22] ret_from_fork+0x10/0x20 [ 137.602888][ T22] [ 137.603612][ T22] The buggy address belongs to the object at ffff000002a330c0 [ 137.603612][ T22] which belongs to the cache names_cache of size 4096 [ 137.605365][ T22] The buggy address is located 32 bytes inside of [ 137.605365][ T22] 4096-byte region [ffff000002a330c0, ffff000002a340c0) [ 137.606836][ T22] The buggy address belongs to the page: [ 137.607957][ T22] page:000000007124f1b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf8ff000002a35140 pfn:0x42a30 [ 137.609729][ T22] head:000000007124f1b8 order:3 compound_mapcount:0 compound_pincount:0 [ 137.611116][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 137.613202][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f6ff000002837700 [ 137.614729][ T22] raw: f8ff000002a35140 0000000080070006 00000001ffffffff 0000000000000000 [ 137.616126][ T22] page dumped because: kasan: bad access detected [ 137.617268][ T22] [ 137.617840][ T22] Memory state around the buggy address: [ 137.619011][ T22] ffff000002a32e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 137.620288][ T22] ffff000002a32f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 137.621287][ T22] >ffff000002a33000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 137.622183][ T22] ^ [ 137.623175][ T22] ffff000002a33100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 137.624045][ T22] ffff000002a33200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 137.625084][ T22] ================================================================== [ 137.625970][ T22] Disabling lock debugging due to kernel taint [ 138.767789][ T182] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 138.902209][ T182] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 139.672967][ T182] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program [ 156.604238][ T3321] can: request_module (can-proto-0) failed. [ 156.747590][ T3321] can: request_module (can-proto-0) failed. [ 156.892842][ T3321] can: request_module (can-proto-0) failed. executing program executing program executing program [ 165.730759][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 165.742544][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 165.754568][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 165.764942][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 19:35:09 Registers: info registers vcpu 0 PC=ffff8000105e6890 X00=f0ff0000090a69c0 X01=ffff800011df55b6 X02=0000000000000001 X03=0000000000000000 X04=ffff800011df55b7 X05=f0ff0000090a69c1 X06=0000000000000020 X07=000000000000000f X08=0000000000000020 X09=ffff800011ddd660 X10=0000000000000020 X11=0000000000000000 X12=f0ff0000090a69ae X13=f0ff0000090a7000 X14=0000000000000000 X15=0000000000000030 X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=f0ff0000090a7000 X20=f0ff0000090a69ae X21=ffff80001282bc50 X22=ffff8000118d7398 X23=00000000ffffffe0 X24=0000000000000652 X25=0000000000000020 X26=ffff800011df55b7 X27=ffff800011df55b6 X28=f0ff0000090a69c0 X29=ffff80001282bb10 X30=ffff8000105ff49c SP=ffff80001282bb10 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=0000000000000000:0000000000000004 Z01=0000000000000000:41284d3000000000 Z02=0000000000000000:3fe0763e60b79c26 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=0000000000000010:00000018f7d06600 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000105e8b08 X00=ffff800012209703 X01=ffff800011e54180 X02=0000000000000000 X03=ffff800011e54180 X04=0000000000000020 X05=ffff800012209703 X06=0000000000000020 X07=0000000000000018 X08=0000000080000000 X09=ffff8000122cd1e0 X10=00000000ffffe000 X11=ffff8000122cd1e0 X12=ffff80001267b610 X13=000000000000030d X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303578302f6366 X18=00000000fffffffd X19=ffff800011de5160 X20=ffff800012209703 X21=ffff800011ef1f30 X22=ffff800012425f10 X23=0000000000000001 X24=fbff0000029a06d8 X25=0000000000000016 X26=ffff800011ef1f30 X27=0000000000000000 X28=fbff0000029a0000 X29=ffff80001267b790 X30=ffff800011758c7c SP=ffff80001267b740 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=0000000000000000:0000000000000004 Z01=0000000000000000:41284d3000000000 Z02=0000000000000000:3fe0763e60b79c26 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=0000000000000010:00000018f7d06600 Z31=0000000000000000:0000000000000000