syzkaller login: [ 99.819720][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 99.845083][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 99.902369][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:41749' (ECDSA) to the list of known hosts. 1970/01/01 00:01:56 fuzzer started 1970/01/01 00:01:59 connecting to host at localhost:44535 1970/01/01 00:01:59 checking machine... 1970/01/01 00:01:59 checking revisions... 1970/01/01 00:02:00 testing simple program... executing program executing program [ 128.466968][ T3329] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 128.531939][ T3329] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 131.251903][ T3329] device hsr_slave_0 entered promiscuous mode [ 131.297252][ T3329] device hsr_slave_1 entered promiscuous mode executing program [ 133.485330][ T3329] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 133.587143][ T3329] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 133.695785][ T3329] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 133.808145][ T3329] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 135.911944][ T3329] 8021q: adding VLAN 0 to HW filter on device bond0 [ 136.131955][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 136.150789][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 137.350818][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 137.359985][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 137.432418][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 137.442653][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 137.518764][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 137.621341][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 137.848713][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 137.858037][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 137.948833][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 137.957641][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 138.006627][ T3329] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 138.242482][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 138.246669][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 140.651338][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 140.662167][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 142.043305][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 142.051890][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 142.108029][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 142.131753][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 142.177373][ T3329] device veth0_vlan entered promiscuous mode [ 142.406058][ T3329] device veth1_vlan entered promiscuous mode [ 142.821395][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 142.831352][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 142.911563][ T3329] device veth0_macvtap entered promiscuous mode [ 142.980331][ T3329] device veth1_macvtap entered promiscuous mode [ 143.059436][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 143.068726][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 143.281703][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 143.291254][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 143.449197][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 143.466447][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 143.538547][ T3329] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 143.539911][ T3329] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 143.540964][ T3329] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 143.541984][ T3329] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 144.460934][ T3329] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 145.464667][ T10] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 145.619848][ T10] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:24 building call list... [ 145.836460][ T10] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 146.058474][ T10] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 149.150935][ T10] device hsr_slave_0 left promiscuous mode [ 149.228096][ T10] device hsr_slave_1 left promiscuous mode [ 149.394423][ T10] device veth1_macvtap left promiscuous mode [ 149.395985][ T10] device veth0_macvtap left promiscuous mode [ 149.398042][ T10] device veth1_vlan left promiscuous mode [ 149.399430][ T10] device veth0_vlan left promiscuous mode executing program [ 151.007710][ T22] ================================================================== [ 151.009008][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x5000 [ 151.010738][ T22] Read at addr f4ff000002a34120 by task kdevtmpfs/22 [ 151.014901][ T22] Pointer tag: [f4], memory tag: [fe] [ 151.015566][ T22] [ 151.016471][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-09688-g20fbb11fe4ea #0 [ 151.017835][ T22] Hardware name: linux,dummy-virt (DT) [ 151.018753][ T22] Call trace: [ 151.019268][ T22] dump_backtrace+0x0/0x1ac [ 151.020022][ T22] show_stack+0x18/0x24 [ 151.020670][ T22] dump_stack_lvl+0x68/0x84 [ 151.021358][ T22] print_address_description+0x7c/0x2b4 [ 151.022117][ T22] kasan_report+0x134/0x380 [ 151.022957][ T22] __do_kernel_fault+0x128/0x1bc [ 151.023788][ T22] do_tag_check_fault+0x74/0x90 [ 151.024466][ T22] do_mem_abort+0x44/0xb4 [ 151.025147][ T22] el1_abort+0x40/0x60 [ 151.025811][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 151.026506][ T22] el1h_64_sync+0x78/0x7c [ 151.027155][ T22] __entry_tramp_text_end+0xdfc/0x5000 [ 151.027881][ T22] d_lookup+0x44/0x70 [ 151.028523][ T22] lookup_dcache+0x24/0x84 [ 151.029176][ T22] __lookup_hash+0x24/0xd0 [ 151.029831][ T22] kern_path_locked+0x90/0x10c [ 151.030503][ T22] handle_remove+0x38/0x284 [ 151.031146][ T22] devtmpfsd+0x8c/0xd0 [ 151.032098][ T22] kthread+0x150/0x15c [ 151.033336][ T22] ret_from_fork+0x10/0x20 [ 151.034833][ T22] [ 151.035582][ T22] Allocated by task 22: [ 151.036262][ T22] kasan_save_stack+0x28/0x60 [ 151.037095][ T22] __kasan_slab_alloc+0xb0/0x110 [ 151.037866][ T22] kmem_cache_alloc+0x1cc/0x340 [ 151.039189][ T22] getname_kernel+0x30/0x150 [ 151.039835][ T22] kern_path_locked+0x2c/0x10c [ 151.041293][ T22] handle_remove+0x38/0x284 [ 151.042818][ T22] devtmpfsd+0x8c/0xd0 [ 151.044004][ T22] kthread+0x150/0x15c [ 151.045104][ T22] ret_from_fork+0x10/0x20 [ 151.046460][ T22] [ 151.047854][ T22] Freed by task 22: [ 151.048529][ T22] kasan_save_stack+0x28/0x60 [ 151.050828][ T22] kasan_set_track+0x28/0x3c [ 151.052974][ T22] kasan_set_free_info+0x20/0x30 [ 151.053905][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 151.054808][ T22] __kasan_slab_free+0x10/0x1c [ 151.055507][ T22] slab_free_freelist_hook+0xc4/0x20c [ 151.056237][ T22] kmem_cache_free+0x9c/0x420 [ 151.056960][ T22] putname.part.0+0x68/0x7c [ 151.057637][ T22] kern_path_locked+0x64/0x10c [ 151.058408][ T22] handle_remove+0x38/0x284 [ 151.059110][ T22] devtmpfsd+0x8c/0xd0 [ 151.059825][ T22] kthread+0x150/0x15c [ 151.060513][ T22] ret_from_fork+0x10/0x20 [ 151.062272][ T22] [ 151.063684][ T22] The buggy address belongs to the object at ffff000002a34100 [ 151.063684][ T22] which belongs to the cache names_cache of size 4096 [ 151.066099][ T22] The buggy address is located 32 bytes inside of [ 151.066099][ T22] 4096-byte region [ffff000002a34100, ffff000002a35100) [ 151.067667][ T22] The buggy address belongs to the page: [ 151.068562][ T22] page:00000000907c95b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42a30 [ 151.069933][ T22] head:00000000907c95b0 order:3 compound_mapcount:0 compound_pincount:0 [ 151.072217][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 151.073773][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f5ff000002837700 [ 151.074987][ T22] raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000 [ 151.076254][ T22] page dumped because: kasan: bad access detected [ 151.077178][ T22] [ 151.077640][ T22] Memory state around the buggy address: [ 151.078807][ T22] ffff000002a33f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 151.080002][ T22] ffff000002a34000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 151.081754][ T22] >ffff000002a34100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 151.084348][ T22] ^ [ 151.085690][ T22] ffff000002a34200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 151.087600][ T22] ffff000002a34300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 151.089553][ T22] ================================================================== [ 151.091639][ T22] Disabling lock debugging due to kernel taint [ 152.595386][ T10] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 152.768342][ T10] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 153.601624][ T10] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program [ 170.503647][ T3324] can: request_module (can-proto-0) failed. [ 170.808124][ T3324] can: request_module (can-proto-0) failed. [ 171.074230][ T3324] can: request_module (can-proto-0) failed. executing program [ 174.011124][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program [ 175.905737][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program [ 179.099101][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 179.110417][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 16:42:02 Registers: info registers vcpu 0 PC=fffffbfffdbfa7e0 X00=0000000000000000 X01=0000000000000000 X02=0000000000000000 X03=0000000000000000 X04=00000000000003e8 X05=0000000000004e20 X06=0000000000000096 X07=0000000000007268 X08=0000000000000065 X09=0000000000007268 X10=0000000000000017 X11=0000000000000000 X12=0000000234c0f59f X13=000000007fffffff X14=00000000000000f1 X15=0000000000000000 X16=000000400003bf18 X17=0000000000000030 X18=0000000000000000 X19=0000ffff8f06d000 X20=000000400003bef0 X21=000000400002c000 X22=000000400002e000 X23=0000000000000000 X24=0000000000000000 X25=0000000000000000 X26=000000000049f238 X27=0000000000002710 X28=0000004000000480 X29=000000400003bee8 X30=000000000004f038 SP=ffff800012834000 PSTATE=404003c9 -Z-- 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=5d2685f6b3ce4069:a7ce1222d6429507 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=0000000000000010:0000001ad5a7ad80 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff80001077ff40 X00=f6ff000002b03880 X01=0000000000000002 X02=ffff8000125b5018 X03=0000000000000018 X04=f6ff000002b03880 X05=0000000000000033 X06=302e31353120205b X07=205b5d3833373031 X08=6132303030303066 X09=7962203032313433 X10=3433613230303030 X11=7420796220303231 X12=5b5d383337303130 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303578302f6366 X18=00000000fffffffd X19=ffff800012429978 X20=ffff8000107804d4 X21=f6ff000002b03880 X22=ffff800012429992 X23=0000000000000f01 X24=000000000000004a X25=ffff8000121eff90 X26=0000000000000000 X27=ffff800012429948 X28=ffff80001221d0b0 X29=ffff80001267b5d0 X30=5fca8000107804fc SP=ffff80001267b5d0 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=0000000000000000:0000000000000000 Z01=0000000000000000:c1162e42fefa39ef Z02=5d2685f6b3ce4069:a7ce1222d6429507 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=0000000000000010:0000001ad5a7ad80 Z31=0000000000000000:0000000000000000