syzkaller login: [ 105.300191][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 105.366417][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 105.394670][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:46851' (ECDSA) to the list of known hosts. 1970/01/01 00:02:02 fuzzer started 1970/01/01 00:02:05 connecting to host at localhost:45021 1970/01/01 00:02:05 checking machine... 1970/01/01 00:02:05 checking revisions... 1970/01/01 00:02:06 testing simple program... executing program executing program [ 134.675888][ T3328] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 134.730428][ T3328] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 137.972797][ T3328] device hsr_slave_0 entered promiscuous mode [ 138.043215][ T3328] device hsr_slave_1 entered promiscuous mode executing program [ 140.335087][ T3328] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 140.461387][ T3328] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 140.566485][ T3328] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 140.707874][ T3328] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 142.976324][ T3328] 8021q: adding VLAN 0 to HW filter on device bond0 [ 143.097159][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 143.132689][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 144.396408][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 144.404779][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready executing program [ 144.475634][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 144.493435][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 144.565288][ T3418] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 144.641796][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 144.843688][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 144.857345][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 145.017262][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 145.032774][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 145.103611][ T3328] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 145.486482][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 145.491092][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 148.160302][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 148.179449][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 149.532306][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 149.543876][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 149.557383][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 149.567172][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 149.627936][ T3328] device veth0_vlan entered promiscuous mode [ 149.783109][ T3328] device veth1_vlan entered promiscuous mode [ 150.215161][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 150.290607][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 150.363902][ T3328] device veth0_macvtap entered promiscuous mode executing program [ 150.440716][ T3328] device veth1_macvtap entered promiscuous mode [ 150.542688][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 150.564698][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 150.682180][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 150.699386][ T3647] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 150.777893][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 150.794706][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 150.872273][ T3328] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 150.873474][ T3328] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 150.874405][ T3328] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 150.875332][ T3328] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 151.835297][ T3328] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 152.748913][ T10] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 152.886711][ T10] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:31 building call list... [ 153.069585][ T10] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 153.257508][ T10] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 156.179681][ T10] device hsr_slave_0 left promiscuous mode [ 156.259693][ T10] device hsr_slave_1 left promiscuous mode [ 156.391302][ T10] device veth1_macvtap left promiscuous mode [ 156.392583][ T10] device veth0_macvtap left promiscuous mode [ 156.404296][ T10] device veth1_vlan left promiscuous mode [ 156.405641][ T10] device veth0_vlan left promiscuous mode executing program [ 158.014417][ T22] ================================================================== [ 158.015718][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x9000 [ 158.017359][ T22] Read at addr fbff0000029830e0 by task kdevtmpfs/22 [ 158.020430][ T22] Pointer tag: [fb], memory tag: [fe] [ 158.021788][ T22] [ 158.022794][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-08747-ga9c9a6f741cd #0 [ 158.024074][ T22] Hardware name: linux,dummy-virt (DT) [ 158.025096][ T22] Call trace: [ 158.025700][ T22] dump_backtrace+0x0/0x1ac [ 158.026519][ T22] show_stack+0x18/0x24 [ 158.027257][ T22] dump_stack_lvl+0x68/0x84 [ 158.028133][ T22] print_address_description+0x7c/0x2b4 [ 158.029284][ T22] kasan_report+0x134/0x380 [ 158.030040][ T22] __do_kernel_fault+0x128/0x1bc [ 158.031112][ T22] do_tag_check_fault+0x74/0x90 [ 158.031928][ T22] do_mem_abort+0x44/0xb4 [ 158.032715][ T22] el1_abort+0x40/0x60 [ 158.033416][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 158.034339][ T22] el1h_64_sync+0x78/0x7c [ 158.035318][ T22] __entry_tramp_text_end+0xdfc/0x9000 [ 158.036498][ T22] d_lookup+0x44/0x70 [ 158.038841][ T22] lookup_dcache+0x24/0x84 [ 158.040368][ T22] __lookup_hash+0x24/0xd0 [ 158.041726][ T22] kern_path_locked+0x90/0x10c [ 158.042611][ T22] handle_remove+0x38/0x284 [ 158.043505][ T22] devtmpfsd+0x8c/0xd0 [ 158.044244][ T22] kthread+0x150/0x15c [ 158.045180][ T22] ret_from_fork+0x10/0x20 [ 158.046238][ T22] [ 158.046937][ T22] Allocated by task 22: [ 158.047846][ T22] kasan_save_stack+0x28/0x60 [ 158.048915][ T22] __kasan_slab_alloc+0xb0/0x110 [ 158.049728][ T22] kmem_cache_alloc+0x1cc/0x340 [ 158.050632][ T22] getname_kernel+0x30/0x150 [ 158.051488][ T22] kern_path_locked+0x2c/0x10c [ 158.052341][ T22] handle_remove+0x38/0x284 [ 158.053243][ T22] devtmpfsd+0x8c/0xd0 [ 158.054019][ T22] kthread+0x150/0x15c [ 158.055310][ T22] ret_from_fork+0x10/0x20 [ 158.057043][ T22] [ 158.057948][ T22] Freed by task 22: [ 158.058976][ T22] kasan_save_stack+0x28/0x60 [ 158.060390][ T22] kasan_set_track+0x28/0x3c [ 158.061801][ T22] kasan_set_free_info+0x20/0x30 [ 158.063285][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 158.065083][ T22] __kasan_slab_free+0x10/0x1c [ 158.066531][ T22] slab_free_freelist_hook+0xc4/0x20c [ 158.068195][ T22] kmem_cache_free+0x9c/0x420 [ 158.069363][ T22] putname.part.0+0x68/0x7c [ 158.070587][ T22] kern_path_locked+0x64/0x10c [ 158.072074][ T22] handle_remove+0x38/0x284 [ 158.073234][ T22] devtmpfsd+0x8c/0xd0 [ 158.074065][ T22] kthread+0x150/0x15c [ 158.074873][ T22] ret_from_fork+0x10/0x20 [ 158.075629][ T22] [ 158.076234][ T22] The buggy address belongs to the object at ffff0000029830c0 [ 158.076234][ T22] which belongs to the cache names_cache of size 4096 [ 158.078978][ T22] The buggy address is located 32 bytes inside of [ 158.078978][ T22] 4096-byte region [ffff0000029830c0, ffff0000029840c0) [ 158.081825][ T22] The buggy address belongs to the page: [ 158.083410][ T22] page:00000000ff606990 refcount:1 mapcount:0 mapping:0000000000000000 index:0xfdff000002982080 pfn:0x42980 [ 158.086112][ T22] head:00000000ff606990 order:3 compound_mapcount:0 compound_pincount:0 [ 158.088227][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 158.090667][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 fbff000002837700 [ 158.092691][ T22] raw: fdff000002982080 0000000080070003 00000001ffffffff 0000000000000000 [ 158.094768][ T22] page dumped because: kasan: bad access detected [ 158.096313][ T22] [ 158.097112][ T22] Memory state around the buggy address: [ 158.098725][ T22] ffff000002982e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 158.100446][ T22] ffff000002982f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 158.101624][ T22] >ffff000002983000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 158.102805][ T22] ^ [ 158.103786][ T22] ffff000002983100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 158.104697][ T22] ffff000002983200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 158.105628][ T22] ================================================================== [ 158.106498][ T22] Disabling lock debugging due to kernel taint executing program [ 159.566448][ T10] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 159.712730][ T10] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 160.484916][ T10] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 180.375521][ T3319] can: request_module (can-proto-0) failed. executing program [ 180.693641][ T3319] can: request_module (can-proto-0) failed. [ 180.867515][ T3319] can: request_module (can-proto-0) failed. executing program executing program [ 186.638973][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 186.645511][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 186.657828][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 186.667634][ T3166] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 22:55:00 Registers: info registers vcpu 0 PC=ffff800011758278 X00=00000000000000fb X01=ffff0000029830e0 X02=ffff0000029830e0 X03=ffff800011e06000 X04=0000000000000001 X05=ffff8000124723c8 X06=ffff8000124723c8 X07=0000000000000018 X08=0000000080000000 X09=ffff8000122cd160 X10=00000000ffffe000 X11=ffff8000122cd160 X12=ffff80001267b610 X13=000000000000030d X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303978302f6366 X18=00000000fffffffd X19=ffff800011e06420 X20=fbff0000029830e0 X21=00000000000000fb X22=ffff800011797dfc X23=ffff0000029830e0 X24=0000000000000000 X25=ffff800011fad000 X26=0000000000000000 X27=0000000000000000 X28=faff0000029a0000 X29=ffff80001267b8f0 X30=32fc800010286cc0 SP=ffff80001267b8f0 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=0000000000000000:0000000000000004 Z01=0000000000000000:4103ae0000000000 Z02=d52352413a47889a:c2305043b83864e3 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=0000000000000010:0000001c3b9d81e0 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800011120d78 X00=ffff800011120d70 X01=0000000000000000 X02=ffff8000121c8000 X03=0000000000000000 X04=0000000000000000 X05=0000000000000001 X06=000000000001d400 X07=0000000000000075 X08=0000000000000312 X09=0000000000000002 X10=ffff80006da06000 X11=0000000000000000 X12=0000000000000003 X13=0000000000000003 X14=0000000000000000 X15=0000000000000000 X16=ffff80001000c000 X17=ffff80006da06000 X18=0000000000000000 X19=ffff8000122ff108 X20=ffff8000122ff100 X21=0000000000000000 X22=0000000000000004 X23=ffff8000122ff108 X24=0000000000000028 X25=ffff8000121e6110 X26=ffff00007b69a000 X27=0000000000000000 X28=0000000000000000 X29=ffff80001000be30 X30=0ebb80001013d6a0 SP=ffff80001000be30 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=0000000000000000:0000000000000004 Z01=0000000000000000:4103ae0000000000 Z02=d52352413a47889a:c2305043b83864e3 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=0000000000000010:0000001c3b9d81e0 Z31=0000000000000000:0000000000000000