syzkaller login: [ 99.772900][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 99.781286][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 99.817600][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:19580' (ECDSA) to the list of known hosts. 1970/01/01 00:01:58 fuzzer started 1970/01/01 00:02:01 connecting to host at localhost:40523 1970/01/01 00:02:01 checking machine... 1970/01/01 00:02:01 checking revisions... 1970/01/01 00:02:03 testing simple program... executing program executing program [ 130.657079][ T3330] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 130.707614][ T3330] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 133.719123][ T3330] device hsr_slave_0 entered promiscuous mode [ 133.783892][ T3330] device hsr_slave_1 entered promiscuous mode executing program [ 135.701614][ T3330] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 135.816392][ T3330] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 135.898729][ T3330] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 135.987416][ T3330] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 138.053834][ T3330] 8021q: adding VLAN 0 to HW filter on device bond0 [ 138.202368][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 138.220665][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 139.373890][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 139.394255][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 139.480506][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 139.500450][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 139.616853][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 139.742274][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 139.999837][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 140.020963][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 140.161376][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 140.184102][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 140.311444][ T3330] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 140.576715][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 140.580263][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 142.773049][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 142.793838][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 144.061528][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 144.083621][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 144.181924][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 144.203572][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 144.254056][ T3330] device veth0_vlan entered promiscuous mode [ 144.435898][ T3330] device veth1_vlan entered promiscuous mode [ 144.806373][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 144.852450][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 144.926411][ T3330] device veth0_macvtap entered promiscuous mode [ 144.976782][ T3330] device veth1_macvtap entered promiscuous mode [ 145.070989][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 145.095069][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 145.207573][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 145.222459][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 145.311397][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 145.333088][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 145.404894][ T3330] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 145.406779][ T3330] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 145.411987][ T3330] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 145.413238][ T3330] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.155912][ T3330] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation executing program [ 147.055274][ T8] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 147.205596][ T8] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:26 building call list... [ 147.354347][ T8] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 147.522290][ T8] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 150.659488][ T8] device hsr_slave_0 left promiscuous mode [ 150.732093][ T8] device hsr_slave_1 left promiscuous mode [ 150.881095][ T8] device veth1_macvtap left promiscuous mode [ 150.882840][ T8] device veth0_macvtap left promiscuous mode [ 150.903577][ T8] device veth1_vlan left promiscuous mode [ 150.905147][ T8] device veth0_vlan left promiscuous mode [ 152.521761][ T22] ================================================================== [ 152.523227][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x3000 [ 152.525218][ T22] Read at addr fdff000002980020 by task kdevtmpfs/22 [ 152.526474][ T22] Pointer tag: [fd], memory tag: [fe] [ 152.528116][ T22] [ 152.530326][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-09234-g7cca308cfdc0 #0 [ 152.533625][ T22] Hardware name: linux,dummy-virt (DT) [ 152.535602][ T22] Call trace: [ 152.536865][ T22] dump_backtrace+0x0/0x1ac [ 152.538926][ T22] show_stack+0x18/0x24 [ 152.539625][ T22] dump_stack_lvl+0x68/0x84 [ 152.541350][ T22] print_address_description+0x7c/0x2b4 [ 152.543572][ T22] kasan_report+0x134/0x380 [ 152.544268][ T22] __do_kernel_fault+0x128/0x1bc [ 152.545782][ T22] do_tag_check_fault+0x74/0x90 [ 152.548075][ T22] do_mem_abort+0x44/0xb4 [ 152.550152][ T22] el1_abort+0x40/0x60 [ 152.552266][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 152.553538][ T22] el1h_64_sync+0x78/0x7c [ 152.554322][ T22] __entry_tramp_text_end+0xdfc/0x3000 [ 152.555000][ T22] d_lookup+0x44/0x70 [ 152.555632][ T22] lookup_dcache+0x24/0x84 [ 152.556320][ T22] __lookup_hash+0x24/0xd0 [ 152.557021][ T22] kern_path_locked+0x90/0x10c [ 152.557757][ T22] handle_remove+0x38/0x284 [ 152.558657][ T22] devtmpfsd+0x8c/0xd0 [ 152.559299][ T22] kthread+0x150/0x15c [ 152.559964][ T22] ret_from_fork+0x10/0x20 [ 152.560891][ T22] [ 152.561413][ T22] Allocated by task 22: [ 152.562138][ T22] kasan_save_stack+0x28/0x60 [ 152.562978][ T22] __kasan_slab_alloc+0xb0/0x110 [ 152.563678][ T22] kmem_cache_alloc+0x1cc/0x340 [ 152.564384][ T22] getname_kernel+0x30/0x150 [ 152.565013][ T22] kern_path_locked+0x2c/0x10c [ 152.565642][ T22] handle_remove+0x38/0x284 [ 152.566275][ T22] devtmpfsd+0x8c/0xd0 [ 152.566970][ T22] kthread+0x150/0x15c [ 152.567621][ T22] ret_from_fork+0x10/0x20 [ 152.568571][ T22] [ 152.569216][ T22] Freed by task 22: [ 152.569956][ T22] kasan_save_stack+0x28/0x60 [ 152.570692][ T22] kasan_set_track+0x28/0x3c [ 152.571414][ T22] kasan_set_free_info+0x20/0x30 [ 152.572141][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 152.572992][ T22] __kasan_slab_free+0x10/0x1c [ 152.573680][ T22] slab_free_freelist_hook+0xc4/0x20c [ 152.574452][ T22] kmem_cache_free+0x9c/0x420 [ 152.575238][ T22] putname.part.0+0x68/0x7c [ 152.576116][ T22] kern_path_locked+0x64/0x10c [ 152.576987][ T22] handle_remove+0x38/0x284 [ 152.577778][ T22] devtmpfsd+0x8c/0xd0 [ 152.578575][ T22] kthread+0x150/0x15c [ 152.579584][ T22] ret_from_fork+0x10/0x20 [ 152.580644][ T22] [ 152.581184][ T22] The buggy address belongs to the object at ffff000002980000 [ 152.581184][ T22] which belongs to the cache names_cache of size 4096 [ 152.583134][ T22] The buggy address is located 32 bytes inside of [ 152.583134][ T22] 4096-byte region [ffff000002980000, ffff000002981000) [ 152.584890][ T22] The buggy address belongs to the page: [ 152.585912][ T22] page:00000000e6edf883 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42980 [ 152.587625][ T22] head:00000000e6edf883 order:3 compound_mapcount:0 compound_pincount:0 [ 152.589780][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 152.591762][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f1ff000002837700 [ 152.593174][ T22] raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000 [ 152.594479][ T22] page dumped because: kasan: bad access detected [ 152.595411][ T22] [ 152.596045][ T22] Memory state around the buggy address: [ 152.597188][ T22] ffff00000297fe00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 152.598363][ T22] ffff00000297ff00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 152.599555][ T22] >ffff000002980000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 152.600828][ T22] ^ [ 152.601802][ T22] ffff000002980100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 152.603104][ T22] ffff000002980200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 152.604347][ T22] ================================================================== [ 152.605353][ T22] Disabling lock debugging due to kernel taint executing program [ 153.855147][ T8] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 153.983660][ T8] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 154.589322][ T8] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 173.235443][ T3322] can: request_module (can-proto-0) failed. [ 173.473088][ T3322] can: request_module (can-proto-0) failed. [ 173.614306][ T3322] can: request_module (can-proto-0) failed. executing program executing program executing program [ 180.862488][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 180.879638][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 180.886151][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 180.899797][ T3168] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 18:56:25 Registers: info registers vcpu 0 PC=ffff800010780f00 X00=faff000002b6f080 X01=0000000000000002 X02=ffff8000125b5018 X03=0000000000000018 X04=faff000002b6f080 X05=0000000000000020 X06=352e32353120205b X07=205b5d3437343632 X08=726f6d656d202c5d X09=5b203a6761742079 X10=676174207265746e X11=202c5d64665b203a X12=5b5d343734363235 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303378302f6366 X18=00000000fffffffd X19=ffff800012429967 X20=ffff800010781494 X21=faff000002b6f080 X22=ffff800012429983 X23=0000000000000f01 X24=000000000000003b X25=ffff8000121eff90 X26=0000000000000000 X27=ffff800012429948 X28=ffff80001221d0b0 X29=ffff80001267b5c0 X30=15db8000107814bc SP=ffff80001267b5c0 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=0000000000000000:0000000000000020 Z01=0000000000000000:413020f800000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:3ff0000000000000 Z04=0000000000000000:3ff0000000000000 Z05=0000000000000000:3fd3333333333333 Z06=0000000000000000:0000004000001010 Z07=0000000000000000:3fee8a83cd8417e4 Z08=0000000000000000:3fb8331e4ed7f288 Z09=0000000000000000:3fe372556024cfe4 Z10=0000000000000000:3fe0000000000000 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=0000000000000000:00000000d0b4aac0 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff80001177d67c X00=00000000000000e0 X01=ffff00007fbd8960 X02=0000000000006ebf X03=0000000000000000 X04=000000000000725e X05=00ffffffffffffff X06=000000023ab44777 X07=000000000000000c X08=f4ff0000028ef988 X09=4c955b97f4f21dc9 X10=f14a7264492b3360 X11=ffff800011dee130 X12=0000000000000000 X13=00000000000002af X14=00000000000002af X15=00002a098bb0bbf8 X16=0000000000000000 X17=0000000000000000 X18=00000000fffffffd X19=0000000000000001 X20=ffff8000121f0010 X21=ffff8000121eff90 X22=ffff8000121d03e8 X23=ffff8000121f0054 X24=0000000000000000 X25=0000000000000000 X26=f4ff0000028eeac0 X27=0000000000000000 X28=0000000000000000 X29=ffff800012643df0 X30=5fd380001177d698 SP=ffff800012643df0 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=f16d304685af524d:e43a252c6d5706fe 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=0000000000000010:0000001b6f5f8a20 Z31=0000000000000000:0000000000000000