syzkaller login: [ 87.176634][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 87.225186][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 87.241867][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:46173' (ECDSA) to the list of known hosts. 1970/01/01 00:01:44 fuzzer started 1970/01/01 00:01:47 connecting to host at localhost:46379 1970/01/01 00:01:47 checking machine... 1970/01/01 00:01:47 checking revisions... 1970/01/01 00:01:48 testing simple program... executing program executing program [ 115.093230][ T2205] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 115.139108][ T2205] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 117.436908][ T2205] device hsr_slave_0 entered promiscuous mode [ 117.490408][ T2205] device hsr_slave_1 entered promiscuous mode [ 119.882194][ T2205] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 119.972429][ T2205] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 120.056890][ T2205] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 120.137809][ T2205] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 122.115936][ T2205] 8021q: adding VLAN 0 to HW filter on device bond0 [ 122.220200][ T1004] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 122.226440][ T1004] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 123.340735][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 123.352502][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 123.432154][ T1004] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 123.442053][ T1004] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 123.530251][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 123.611148][ T1004] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 123.987049][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 123.999542][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 124.089212][ T2521] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 124.100992][ T2521] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 124.159139][ T2205] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 124.459861][ T1976] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 124.462456][ T1976] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 127.045970][ T2521] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 127.053276][ T2521] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 128.222118][ T2521] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 128.248101][ T2521] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 128.276555][ T2521] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 128.288278][ T2521] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 128.322498][ T2205] device veth0_vlan entered promiscuous mode [ 128.462082][ T2205] device veth1_vlan entered promiscuous mode [ 128.780268][ T2521] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 128.792143][ T2521] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 128.858523][ T2205] device veth0_macvtap entered promiscuous mode [ 128.927442][ T2205] device veth1_macvtap entered promiscuous mode [ 129.139485][ T1004] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 129.147829][ T1004] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 129.168579][ T1004] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 129.177772][ T1004] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 129.275266][ T1976] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready executing program [ 129.297139][ T1976] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 129.357731][ T2205] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 129.359037][ T2205] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 129.360067][ T2205] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 129.361066][ T2205] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 130.112537][ T2205] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 130.807654][ T8] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:10 building call list... [ 131.049264][ T8] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 131.175740][ T8] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 131.303160][ T8] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 134.249121][ T8] device hsr_slave_0 left promiscuous mode [ 134.306471][ T8] device hsr_slave_1 left promiscuous mode [ 134.457929][ T8] device veth1_macvtap left promiscuous mode [ 134.460612][ T8] device veth0_macvtap left promiscuous mode [ 134.481816][ T8] device veth1_vlan left promiscuous mode [ 134.483150][ T8] device veth0_vlan left promiscuous mode executing program [ 135.993223][ T22] ================================================================== [ 135.996843][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xddc/0xd000 [ 135.998546][ T22] Read at addr fcff000002980020 by task kdevtmpfs/22 [ 135.999395][ T22] Pointer tag: [fc], memory tag: [fe] [ 136.000315][ T22] [ 136.001338][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-11152-g78e709522d2c #0 [ 136.002600][ T22] Hardware name: linux,dummy-virt (DT) [ 136.003462][ T22] Call trace: [ 136.004001][ T22] dump_backtrace+0x0/0x1ac [ 136.004670][ T22] show_stack+0x18/0x24 [ 136.005234][ T22] dump_stack_lvl+0x68/0x84 [ 136.005830][ T22] print_address_description+0x7c/0x2b4 [ 136.006488][ T22] kasan_report+0x134/0x380 [ 136.007076][ T22] __do_kernel_fault+0x128/0x1bc [ 136.007693][ T22] do_tag_check_fault+0x74/0x90 [ 136.008328][ T22] do_mem_abort+0x44/0xb4 [ 136.008899][ T22] el1_abort+0x40/0x60 [ 136.009509][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 136.010123][ T22] el1h_64_sync+0x78/0x7c [ 136.010696][ T22] __entry_tramp_text_end+0xddc/0xd000 [ 136.011339][ T22] d_lookup+0x44/0x70 [ 136.011931][ T22] lookup_dcache+0x24/0x84 [ 136.012547][ T22] __lookup_hash+0x24/0xd0 [ 136.013124][ T22] kern_path_locked+0x90/0x10c [ 136.013778][ T22] handle_remove+0x38/0x284 [ 136.014469][ T22] devtmpfsd+0x8c/0xd0 [ 136.015033][ T22] kthread+0x150/0x15c [ 136.015599][ T22] ret_from_fork+0x10/0x20 [ 136.016375][ T22] [ 136.016850][ T22] Allocated by task 22: [ 136.017471][ T22] kasan_save_stack+0x28/0x60 [ 136.018221][ T22] __kasan_slab_alloc+0xb0/0x110 [ 136.018830][ T22] kmem_cache_alloc+0x194/0x2f4 [ 136.019438][ T22] getname_kernel+0x30/0x150 [ 136.020049][ T22] kern_path_locked+0x2c/0x10c [ 136.020653][ T22] handle_remove+0x38/0x284 [ 136.021233][ T22] devtmpfsd+0x8c/0xd0 [ 136.021792][ T22] kthread+0x150/0x15c [ 136.022352][ T22] ret_from_fork+0x10/0x20 [ 136.022997][ T22] [ 136.023465][ T22] Freed by task 22: [ 136.024007][ T22] kasan_save_stack+0x28/0x60 [ 136.024608][ T22] kasan_set_track+0x28/0x3c [ 136.025190][ T22] kasan_set_free_info+0x20/0x30 [ 136.025794][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 136.026475][ T22] __kasan_slab_free+0x10/0x1c [ 136.027072][ T22] slab_free_freelist_hook+0xc4/0x20c [ 136.027708][ T22] kmem_cache_free+0x9c/0x3d4 [ 136.028341][ T22] putname.part.0+0x68/0x7c [ 136.029040][ T22] kern_path_locked+0x64/0x10c [ 136.029646][ T22] handle_remove+0x38/0x284 [ 136.030218][ T22] devtmpfsd+0x8c/0xd0 [ 136.030771][ T22] kthread+0x150/0x15c [ 136.031323][ T22] ret_from_fork+0x10/0x20 [ 136.031926][ T22] [ 136.032335][ T22] The buggy address belongs to the object at ffff000002980000 [ 136.032335][ T22] which belongs to the cache names_cache of size 4096 [ 136.033636][ T22] The buggy address is located 32 bytes inside of [ 136.033636][ T22] 4096-byte region [ffff000002980000, ffff000002981000) [ 136.034851][ T22] The buggy address belongs to the page: [ 136.035580][ T22] page:00000000af1af42d refcount:1 mapcount:0 mapping:0000000000000000 index:0xfaff000002982080 pfn:0x42980 [ 136.036785][ T22] head:00000000af1af42d order:3 compound_mapcount:0 compound_pincount:0 [ 136.037596][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 136.038984][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 fcff000002837700 [ 136.039835][ T22] raw: faff000002982080 0000000080070005 00000001ffffffff 0000000000000000 [ 136.042968][ T22] page dumped because: kasan: bad access detected [ 136.046354][ T22] [ 136.047407][ T22] Memory state around the buggy address: [ 136.049664][ T22] ffff00000297fe00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 136.052670][ T22] ffff00000297ff00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 136.054222][ T22] >ffff000002980000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 136.055001][ T22] ^ [ 136.055621][ T22] ffff000002980100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 136.056418][ T22] ffff000002980200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 136.057222][ T22] ================================================================== [ 136.057982][ T22] Disabling lock debugging due to kernel taint [ 137.436729][ T8] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 137.566037][ T8] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 138.190995][ T8] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 156.028757][ T2547] can: request_module (can-proto-0) failed. executing program [ 156.405511][ T2547] can: request_module (can-proto-0) failed. [ 156.552595][ T2547] can: request_module (can-proto-0) failed. executing program executing program [ 163.191409][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 163.198702][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 163.204858][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 163.213292][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 00:49:40 Registers: info registers vcpu 0 PC=ffff80001178fc50 X00=ffff80001224d160 X01=00000000000000c0 X02=0000000000000000 X03=ffff80001224d160 X04=0000000000000000 X05=0000000000000000 X06=0000000000000000 X07=ffff8000122fd240 X08=ffff80001224d240 X09=ffff8000122fd240 X10=00000000ffffe000 X11=ffff8000122fd240 X12=ffff8000126ab610 X13=0000000000000309 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306478302f6364 X18=00000000fffffffd X19=ffff80001224d160 X20=00000000000000c0 X21=0000000000000309 X22=ffff800012459de0 X23=0000000000000000 X24=ffff800012459798 X25=ffff80001221ff90 X26=0000000000000000 X27=ffff800012459948 X28=ffff80001224d110 X29=ffff8000126ab620 X30=ffff8000100f4130 SP=ffff8000126ab620 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=ace4a451afff2a37:ff64808ad48de42a 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=0000000000000010:000000182f7694a0 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000117834dc X00=00000000000000e0 X01=ffff00007fbd79a0 X02=0000000000006e77 X03=0000000000000000 X04=000000000000682e X05=00000000000000c0 X06=00000001fcf0528e X07=000000000000000c X08=fcff0000028ef978 X09=3020b3571bf61f73 X10=b84e5897fb364e33 X11=ffff800011e10200 X12=0000000000000000 X13=0000000000000000 X14=00000000000001ff X15=00009c54a0d603de X16=ffff800010281190 X17=ffff800011321764 X18=00000000fffffffd X19=0000000000000001 X20=ffff800012220010 X21=ffff80001221ff90 X22=ffff800012200428 X23=ffff800012220054 X24=0000000000000000 X25=0000000000000000 X26=fcff0000028eeac0 X27=0000000000000000 X28=0000000000000000 X29=ffff800012673df0 X30=00dd8000117834f8 SP=ffff800012673df0 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=3a3a3a3a3a3a3a3a:3a3a3a3a3a3a3a3a Z01=0000000000405800:0000300030687465 Z02=000000001578f000:0000000030687465 Z03=8020080280000002:8020000200000000 Z04=8020080200000002:8020080200000000 Z05=0000000000000000:0000000000000000 Z06=0000000000000000:0000000000000000 Z07=8020080280200802:8020080280200802 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=4010040140100401:4010040140100401 Z17=a00a0002a00a0000:aa02aa00aa82a200 Z18=8020080200000002:8020080200000000 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=0000000000000000:0000000000000000 Z31=0000000000000000:0000000000000000