syzkaller login: [ 101.113118][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 101.127044][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 101.159157][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:18652' (ECDSA) to the list of known hosts. 1970/01/01 00:02:01 fuzzer started 1970/01/01 00:02:04 connecting to host at localhost:39109 1970/01/01 00:02:04 checking machine... 1970/01/01 00:02:04 checking revisions... 1970/01/01 00:02:05 testing simple program... executing program executing program [ 133.707066][ T3319] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 133.752736][ T3319] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 136.409679][ T3319] device hsr_slave_0 entered promiscuous mode [ 136.466092][ T3319] device hsr_slave_1 entered promiscuous mode executing program [ 138.542854][ T3319] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 138.644619][ T3319] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 138.741696][ T3319] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 138.855550][ T3319] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 140.899473][ T3319] 8021q: adding VLAN 0 to HW filter on device bond0 [ 141.025311][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 141.051554][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 142.167756][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 142.177174][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 142.261728][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 142.294139][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 142.367359][ T3090] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 142.454585][ T3090] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 142.663055][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 142.673339][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 142.766994][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 142.775851][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 142.856352][ T3319] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 143.175957][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 143.177517][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 145.623042][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 145.643384][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 146.794825][ T3635] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 146.814185][ T3635] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 146.844285][ T3090] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 146.862210][ T3090] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 146.895919][ T3319] device veth0_vlan entered promiscuous mode [ 147.033401][ T3319] device veth1_vlan entered promiscuous mode [ 147.577280][ T2927] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 147.595851][ T2927] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 147.653859][ T3319] device veth0_macvtap entered promiscuous mode [ 147.735038][ T3319] device veth1_macvtap entered promiscuous mode [ 147.800169][ T2927] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 147.826702][ T2927] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 148.031235][ T3090] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 148.066093][ T3090] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 148.137459][ T2927] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 148.157736][ T2927] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 148.231739][ T3319] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 148.234697][ T3319] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 148.236795][ T3319] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 148.241083][ T3319] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 149.134607][ T3319] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation executing program [ 149.983699][ T197] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 150.127296][ T197] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:29 building call list... [ 150.269143][ T197] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 150.459358][ T197] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 153.553160][ T197] device hsr_slave_0 left promiscuous mode [ 153.621256][ T197] device hsr_slave_1 left promiscuous mode [ 153.770478][ T197] device veth1_macvtap left promiscuous mode [ 153.771924][ T197] device veth0_macvtap left promiscuous mode [ 153.773941][ T197] device veth1_vlan left promiscuous mode [ 153.775467][ T197] device veth0_vlan left promiscuous mode [ 155.159687][ T22] ================================================================== [ 155.160710][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xf000 [ 155.162268][ T22] Read at addr f0ff0000029861a0 by task kdevtmpfs/22 [ 155.163199][ T22] Pointer tag: [f0], memory tag: [fe] [ 155.164830][ T22] [ 155.165932][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-04526-gebf435d3b51b #0 [ 155.167064][ T22] Hardware name: linux,dummy-virt (DT) [ 155.168040][ T22] Call trace: [ 155.168585][ T22] dump_backtrace+0x0/0x1b0 [ 155.169375][ T22] show_stack+0x18/0x24 [ 155.170054][ T22] dump_stack_lvl+0x68/0x84 [ 155.170751][ T22] print_address_description+0x7c/0x2b4 [ 155.171532][ T22] kasan_report+0x134/0x380 [ 155.172227][ T22] __do_kernel_fault+0x1a8/0x1dc [ 155.172977][ T22] do_tag_check_fault+0x74/0x90 [ 155.173722][ T22] do_mem_abort+0x44/0xb4 [ 155.174381][ T22] el1_abort+0x40/0x60 [ 155.175027][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 155.175783][ T22] el1h_64_sync+0x78/0x7c [ 155.176421][ T22] __entry_tramp_text_end+0xdfc/0xf000 [ 155.177229][ T22] d_lookup+0x44/0x70 [ 155.177958][ T22] lookup_dcache+0x24/0x84 [ 155.178847][ T22] __lookup_hash+0x24/0xd0 [ 155.179533][ T22] kern_path_locked+0x90/0x10c [ 155.180247][ T22] handle_remove+0x38/0x284 [ 155.181001][ T22] devtmpfsd+0x8c/0xd0 [ 155.181669][ T22] kthread+0x150/0x15c [ 155.182318][ T22] ret_from_fork+0x10/0x18 [ 155.183235][ T22] [ 155.183819][ T22] Allocated by task 22: [ 155.184518][ T22] kasan_save_stack+0x28/0x60 [ 155.186342][ T22] __kasan_slab_alloc+0xb0/0x110 [ 155.187299][ T22] kmem_cache_alloc+0x1cc/0x340 [ 155.188139][ T22] getname_kernel+0x30/0x150 [ 155.188847][ T22] kern_path_locked+0x2c/0x10c [ 155.189529][ T22] handle_remove+0x38/0x284 [ 155.190196][ T22] devtmpfsd+0x8c/0xd0 [ 155.190823][ T22] kthread+0x150/0x15c [ 155.191447][ T22] ret_from_fork+0x10/0x18 [ 155.192168][ T22] [ 155.192633][ T22] Freed by task 22: [ 155.193214][ T22] kasan_save_stack+0x28/0x60 [ 155.193909][ T22] kasan_set_track+0x28/0x3c [ 155.194899][ T22] kasan_set_free_info+0x20/0x30 [ 155.195471][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 155.196129][ T22] __kasan_slab_free+0x10/0x1c [ 155.196723][ T22] slab_free_freelist_hook+0xc4/0x20c [ 155.197362][ T22] kmem_cache_free+0x9c/0x420 [ 155.197974][ T22] putname.part.0+0x68/0x7c [ 155.198674][ T22] kern_path_locked+0x64/0x10c [ 155.199252][ T22] handle_remove+0x38/0x284 [ 155.199787][ T22] devtmpfsd+0x8c/0xd0 [ 155.200302][ T22] kthread+0x150/0x15c [ 155.200849][ T22] ret_from_fork+0x10/0x18 [ 155.201391][ T22] [ 155.201759][ T22] The buggy address belongs to the object at ffff000002986180 [ 155.201759][ T22] which belongs to the cache names_cache of size 4096 [ 155.202960][ T22] The buggy address is located 32 bytes inside of [ 155.202960][ T22] 4096-byte region [ffff000002986180, ffff000002987180) [ 155.204125][ T22] The buggy address belongs to the page: [ 155.204917][ T22] page:0000000034668f89 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf3ff000002984100 pfn:0x42980 [ 155.207771][ T22] head:0000000034668f89 order:3 compound_mapcount:0 compound_pincount:0 [ 155.209563][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 155.211181][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 faff000002837700 [ 155.212178][ T22] raw: f3ff000002984100 0000000080070003 00000001ffffffff 0000000000000000 [ 155.213225][ T22] page dumped because: kasan: bad access detected [ 155.214007][ T22] [ 155.214470][ T22] Memory state around the buggy address: [ 155.215349][ T22] ffff000002985f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 155.216264][ T22] ffff000002986000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 155.217168][ T22] >ffff000002986100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 155.218117][ T22] ^ [ 155.219083][ T22] ffff000002986200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 155.219943][ T22] ffff000002986300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 155.220876][ T22] ================================================================== [ 155.221732][ T22] Disabling lock debugging due to kernel taint executing program [ 156.522583][ T197] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 156.646217][ T197] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 157.312066][ T197] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 174.206766][ T3311] can: request_module (can-proto-0) failed. [ 174.402783][ T3311] can: request_module (can-proto-0) failed. [ 174.662274][ T3311] can: request_module (can-proto-0) failed. executing program executing program executing program [ 183.626318][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 183.640112][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 183.647617][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 183.663470][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 17:32:44 Registers: info registers vcpu 0 PC=ffff800010103f00 X00=0000000100000003 X01=f3ff0000029a0000 X02=ffff80006d9b5000 X03=00000000ffffffff X04=0000000000015ff5 X05=0000000000000000 X06=0000000000000000 X07=ffff8000122ed118 X08=ffff80001223d118 X09=ffff8000122ed118 X10=00000000ffffe000 X11=ffff8000122ed118 X12=ffff80001269b5d0 X13=000000000000030b X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306678302f6366 X18=00000000fffffffd X19=ffff800012210058 X20=00000000000000c0 X21=0000000000000000 X22=ffff800012448db8 X23=ffff800012448e18 X24=ffff80001223d008 X25=ffff80001220ff90 X26=0000000000000000 X27=ffff800012448988 X28=ffff8000124487d8 X29=ffff80001269b610 X30=ffff800010103efc SP=ffff80001269b610 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:c1162e42fefa39ef Z02=f9c7de8b40d5589f:4536a8fd06ef240e 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=0000000000000010:0000001bfac7b690 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000105e2398 X00=f9ff00000a12bc80 X01=f1ff00000966cc00 X02=000a0701004e0000 X03=0000000000000a80 X04=00000040003f1f80 X05=0000000000000000 X06=0000000000000000 X07=0000000000000000 X08=0000000000000000 X09=0000000000000000 X10=0000004000166000 X11=0000000000000001 X12=0000000000000000 X13=0000000000000000 X14=0000000000000010 X15=ffffffffffff7fff X16=0000ffff8731abf0 X17=0000ffff8712aa10 X18=00000000fffffffd X19=f9ff00000a12b000 X20=f1ff00000966c000 X21=fffffc0000284ac0 X22=fffffc0000259b00 X23=fffffc0000259b00 X24=0000ffff8732b000 X25=f1ff0000031e8f40 X26=f0ff0000055442a0 X27=ffff800012327e88 X28=ffff8000124df948 X29=ffff8000138c3c90 X30=ffff8000100354dc SP=ffff8000138c3c90 PSTATE=00400009 ---- 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:c1162e42fefa39ef Z02=f9c7de8b40d5589f:4536a8fd06ef240e 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=0000000000000010:0000001bfac7b690 Z31=0000000000000000:0000000000000000