syzkaller login: [ 84.934167][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 84.975941][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 84.986299][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:46407' (ECDSA) to the list of known hosts. 1970/01/01 00:01:38 fuzzer started 1970/01/01 00:01:41 connecting to host at localhost:39719 1970/01/01 00:01:41 checking machine... 1970/01/01 00:01:41 checking revisions... 1970/01/01 00:01:43 testing simple program... executing program executing program [ 109.556323][ T2205] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 109.596637][ T2205] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 112.009462][ T2205] device hsr_slave_0 entered promiscuous mode [ 112.060590][ T2205] device hsr_slave_1 entered promiscuous mode [ 113.992245][ T2205] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 114.080201][ T2205] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 114.153938][ T2205] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 114.252426][ T2205] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 116.142776][ T2205] 8021q: adding VLAN 0 to HW filter on device bond0 [ 116.308714][ T2446] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 116.326635][ T2446] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 117.286720][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 117.306904][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready executing program [ 117.410894][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 117.421787][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 117.511580][ T2522] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 117.610373][ T2446] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 117.781793][ T2446] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 117.794153][ T2446] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 117.877997][ T1809] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 117.892116][ T1809] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 117.961746][ T2205] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 118.247148][ T1809] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 118.249832][ T1809] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 120.415048][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 120.422811][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 121.460665][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 121.480069][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 121.518358][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 121.533832][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 121.580676][ T2205] device veth0_vlan entered promiscuous mode [ 121.719415][ T2205] device veth1_vlan entered promiscuous mode [ 122.071412][ T2522] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 122.083253][ T2522] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 122.149077][ T2205] device veth0_macvtap entered promiscuous mode [ 122.201057][ T2205] device veth1_macvtap entered promiscuous mode [ 122.466748][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 122.491763][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 122.508568][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 122.521299][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 122.627133][ T2522] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 122.642040][ T2522] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 122.711464][ T2205] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 122.713298][ T2205] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 122.715593][ T2205] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 122.716820][ T2205] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 123.499091][ T2205] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 124.341063][ T138] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 124.498175][ T138] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:04 building call list... [ 124.692787][ T138] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 124.880103][ T138] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 127.881787][ T138] device hsr_slave_0 left promiscuous mode [ 127.949025][ T138] device hsr_slave_1 left promiscuous mode [ 128.075034][ T138] device veth1_macvtap left promiscuous mode [ 128.076617][ T138] device veth0_macvtap left promiscuous mode [ 128.077856][ T138] device veth1_vlan left promiscuous mode [ 128.078965][ T138] device veth0_vlan left promiscuous mode executing program [ 129.559298][ T22] ================================================================== [ 129.560443][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xddc/0xf000 [ 129.561959][ T22] Read at addr fdff000003031060 by task kdevtmpfs/22 [ 129.563874][ T22] Pointer tag: [fd], memory tag: [fe] [ 129.565606][ T22] [ 129.566337][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-10690-g70868a180501 #0 [ 129.567435][ T22] Hardware name: linux,dummy-virt (DT) [ 129.568460][ T22] Call trace: [ 129.568986][ T22] dump_backtrace+0x0/0x1ac [ 129.570744][ T22] show_stack+0x18/0x24 [ 129.571395][ T22] dump_stack_lvl+0x68/0x84 [ 129.572132][ T22] print_address_description+0x7c/0x2b4 [ 129.572978][ T22] kasan_report+0x134/0x380 [ 129.573843][ T22] __do_kernel_fault+0x128/0x1bc [ 129.576150][ T22] do_tag_check_fault+0x74/0x90 [ 129.577640][ T22] do_mem_abort+0x44/0xb4 [ 129.579182][ T22] el1_abort+0x40/0x60 [ 129.581220][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 129.583593][ T22] el1h_64_sync+0x78/0x7c [ 129.585225][ T22] __entry_tramp_text_end+0xddc/0xf000 [ 129.586079][ T22] d_lookup+0x44/0x70 [ 129.587029][ T22] lookup_dcache+0x24/0x84 [ 129.587704][ T22] __lookup_hash+0x24/0xd0 [ 129.588497][ T22] kern_path_locked+0x90/0x10c [ 129.589359][ T22] handle_remove+0x38/0x284 [ 129.590132][ T22] devtmpfsd+0x8c/0xd0 [ 129.590822][ T22] kthread+0x150/0x15c [ 129.591534][ T22] ret_from_fork+0x10/0x20 [ 129.592477][ T22] [ 129.593015][ T22] Allocated by task 22: [ 129.593705][ T22] kasan_save_stack+0x28/0x60 [ 129.594665][ T22] __kasan_slab_alloc+0xb0/0x110 [ 129.595610][ T22] kmem_cache_alloc+0x194/0x2f4 [ 129.596343][ T22] getname_kernel+0x30/0x150 [ 129.597011][ T22] kern_path_locked+0x2c/0x10c [ 129.597678][ T22] handle_remove+0x38/0x284 [ 129.598350][ T22] devtmpfsd+0x8c/0xd0 [ 129.599505][ T22] kthread+0x150/0x15c [ 129.600234][ T22] ret_from_fork+0x10/0x20 [ 129.600973][ T22] [ 129.601450][ T22] Freed by task 22: [ 129.602028][ T22] kasan_save_stack+0x28/0x60 [ 129.603013][ T22] kasan_set_track+0x28/0x3c [ 129.603679][ T22] kasan_set_free_info+0x20/0x30 [ 129.604492][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 129.605341][ T22] __kasan_slab_free+0x10/0x1c [ 129.606088][ T22] slab_free_freelist_hook+0xc4/0x20c [ 129.607081][ T22] kmem_cache_free+0x9c/0x3d4 [ 129.607786][ T22] putname.part.0+0x68/0x7c [ 129.608404][ T22] kern_path_locked+0x64/0x10c [ 129.609103][ T22] handle_remove+0x38/0x284 [ 129.609761][ T22] devtmpfsd+0x8c/0xd0 [ 129.610382][ T22] kthread+0x150/0x15c [ 129.610996][ T22] ret_from_fork+0x10/0x20 [ 129.611653][ T22] [ 129.612117][ T22] The buggy address belongs to the object at ffff000003031040 [ 129.612117][ T22] which belongs to the cache names_cache of size 4096 [ 129.613438][ T22] The buggy address is located 32 bytes inside of [ 129.613438][ T22] 4096-byte region [ffff000003031040, ffff000003032040) [ 129.615003][ T22] The buggy address belongs to the page: [ 129.615911][ T22] page:000000004d442978 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf6ff000003030000 pfn:0x43030 [ 129.617333][ T22] head:000000004d442978 order:3 compound_mapcount:0 compound_pincount:0 [ 129.618444][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 129.620080][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f5ff000002837700 [ 129.621121][ T22] raw: f6ff000003030000 0000000080070001 00000001ffffffff 0000000000000000 [ 129.622111][ T22] page dumped because: kasan: bad access detected [ 129.622834][ T22] [ 129.623271][ T22] Memory state around the buggy address: [ 129.624147][ T22] ffff000003030e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 129.625288][ T22] ffff000003030f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 129.626135][ T22] >ffff000003031000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 129.626980][ T22] ^ [ 129.627728][ T22] ffff000003031100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 129.628611][ T22] ffff000003031200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 129.629774][ T22] ================================================================== [ 129.630618][ T22] Disabling lock debugging due to kernel taint [ 130.850239][ T138] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 130.994010][ T138] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 131.638587][ T138] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program executing program [ 151.040177][ T2200] can: request_module (can-proto-0) failed. [ 151.286922][ T2200] can: request_module (can-proto-0) failed. [ 151.448755][ T2200] can: request_module (can-proto-0) failed. executing program executing program [ 157.161455][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 157.182043][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 157.209123][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 157.219431][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 19:10:28 Registers: info registers vcpu 0 PC=ffff800011128d48 X00=ffff800011128d40 X01=0000000000000000 X02=ffff8000121f8000 X03=0000000010000000 X04=0002160ec0000000 X05=00ffffffffffffff X06=00000001e569b407 X07=ffff00007fbc1b80 X08=ffff00007fbc1c00 X09=0000000000000000 X10=000000000000022d X11=0000000000000000 X12=0000000000000006 X13=0000000000000000 X14=000000000000022d X15=0000106c77b9433c X16=ffff800010004000 X17=ffff80006d9c0000 X18=00000000fffffffd X19=ffff80001232f208 X20=ffff80001232f200 X21=0000000000000000 X22=0000000000000004 X23=ffff80001232f208 X24=0000000000000028 X25=0000000000000000 X26=ffff8000122398c0 X27=0000000000000000 X28=ffff8000122398c0 X29=ffff800010003ec0 X30=bdf380001013e570 SP=ffff800010003ec0 PSTATE=204000c9 --C- 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=0c8b73b9fefd0a7c:131a80ed03ef81a2 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=0000000000000010:00000016d640f6a0 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000102877f0 X00=0000000000000023 X01=faff0000029a0000 X02=0000000000000000 X03=0000000000000000 X04=0000000000015ff5 X05=ffff00007fbcf9c8 X06=0000000000000000 X07=ffff8000122fd240 X08=ffff80001224d240 X09=ffff8000122fd240 X10=00000000ffffe000 X11=ffff8000122fd240 X12=ffff8000126ab600 X13=0000000000000308 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306678302f6364 X18=00000000fffffffd X19=ffff800011e28b08 X20=fdff000003031060 X21=00000000000000fd X22=ffff8000117a1ddc X23=ffff000003031060 X24=0000000000000000 X25=ffff800011fd2000 X26=0000000000000000 X27=0000000000000000 X28=faff0000029a0000 X29=ffff8000126ab900 X30=ffff8000102877f0 SP=ffff8000126ab900 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=0000000000000000:3fd4c9424365ceee Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:412b26a000000000 Z04=0000000000000000:3ff0000000000000 Z05=0000000000000000:3fd3333333333333 Z06=0000004000001010:0000004000001010 Z07=0000000000000000:0000000000000000 Z08=0000000000000000:0000000000000001 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=0000000000000008:00000000997685d6 Z31=0000000000000000:0000000000000000