syzkaller login: [ 55.839089][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 55.858111][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 55.866166][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:44683' (ECDSA) to the list of known hosts. 1970/01/01 00:01:02 fuzzer started 1970/01/01 00:01:04 connecting to host at localhost:37397 1970/01/01 00:01:04 checking machine... 1970/01/01 00:01:04 checking revisions... 1970/01/01 00:01:05 testing simple program... executing program [ 68.715197][ T2206] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 68.737679][ T2206] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 70.005503][ T2206] device hsr_slave_0 entered promiscuous mode [ 70.053722][ T2206] device hsr_slave_1 entered promiscuous mode executing program [ 71.095421][ T2206] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 71.162525][ T2206] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 71.224883][ T2206] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 71.294762][ T2206] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 72.367987][ T2206] 8021q: adding VLAN 0 to HW filter on device bond0 [ 72.435459][ T1810] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 72.443157][ T1810] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 72.996012][ T2510] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 73.004633][ T2510] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 73.038933][ T1810] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 73.044345][ T1810] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 73.076405][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 73.117012][ T1810] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 73.227207][ T1976] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 73.240310][ T1976] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 73.274373][ T2510] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 73.282391][ T2510] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 73.314821][ T2206] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 73.449683][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 73.451616][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 74.632568][ T1810] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 74.637551][ T1810] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 75.238506][ T2510] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 75.244309][ T2510] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 75.259980][ T2510] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 75.264825][ T2510] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 75.293971][ T2206] device veth0_vlan entered promiscuous mode [ 75.363296][ T2206] device veth1_vlan entered promiscuous mode [ 75.556781][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 75.565327][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 75.606240][ T2206] device veth0_macvtap entered promiscuous mode [ 75.643748][ T2206] device veth1_macvtap entered promiscuous mode [ 75.768873][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 75.776134][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 75.783439][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 75.788606][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 75.840300][ T2541] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 75.845712][ T2541] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 75.883241][ T2206] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.884289][ T2206] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.885386][ T2206] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.886230][ T2206] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.320007][ T2206] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 76.743027][ T1760] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:01:16 building call list... [ 76.869931][ T1760] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 76.965145][ T1760] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.089047][ T1760] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 79.814442][ T1760] device hsr_slave_0 left promiscuous mode [ 79.862002][ T1760] device hsr_slave_1 left promiscuous mode executing program [ 79.964352][ T1760] device veth1_macvtap left promiscuous mode [ 79.965452][ T1760] device veth0_macvtap left promiscuous mode [ 79.966587][ T1760] device veth1_vlan left promiscuous mode [ 79.967288][ T1760] device veth0_vlan left promiscuous mode [ 80.978887][ T22] ================================================================== [ 80.979987][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xddc/0x10000 [ 80.980976][ T22] Read at addr f1ff000002afa0a0 by task kdevtmpfs/22 [ 80.981715][ T22] Pointer tag: [f1], memory tag: [fe] [ 80.982584][ T22] [ 80.984179][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-10807-gbf9f243f23e6 #0 [ 80.984853][ T22] Hardware name: linux,dummy-virt (DT) [ 80.985450][ T22] Call trace: [ 80.985771][ T22] dump_backtrace+0x0/0x1ac [ 80.986241][ T22] show_stack+0x18/0x24 [ 80.986647][ T22] dump_stack_lvl+0x68/0x84 [ 80.987050][ T22] print_address_description+0x7c/0x2b4 [ 80.987522][ T22] kasan_report+0x134/0x380 [ 80.987930][ T22] __do_kernel_fault+0x128/0x1bc [ 80.988354][ T22] do_tag_check_fault+0x74/0x90 [ 80.988771][ T22] do_mem_abort+0x44/0xb4 [ 80.989170][ T22] el1_abort+0x40/0x60 [ 80.989698][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 80.990204][ T22] el1h_64_sync+0x78/0x7c [ 80.990619][ T22] __entry_tramp_text_end+0xddc/0x10000 [ 80.991065][ T22] d_lookup+0x44/0x70 [ 80.991506][ T22] lookup_dcache+0x24/0x84 [ 80.991918][ T22] __lookup_hash+0x24/0xd0 [ 80.992429][ T22] kern_path_locked+0x90/0x10c [ 80.992962][ T22] handle_remove+0x38/0x284 [ 80.993483][ T22] devtmpfsd+0x8c/0xd0 [ 80.993974][ T22] kthread+0x150/0x15c [ 80.994498][ T22] ret_from_fork+0x10/0x20 [ 80.995145][ T22] [ 80.995548][ T22] Allocated by task 22: [ 80.996083][ T22] kasan_save_stack+0x28/0x60 [ 80.996729][ T22] __kasan_slab_alloc+0xb0/0x110 [ 80.997280][ T22] kmem_cache_alloc+0x194/0x2f4 [ 80.997819][ T22] getname_kernel+0x30/0x150 [ 80.998352][ T22] kern_path_locked+0x2c/0x10c [ 80.998894][ T22] handle_remove+0x38/0x284 [ 80.999669][ T22] devtmpfsd+0x8c/0xd0 [ 81.000159][ T22] kthread+0x150/0x15c [ 81.000664][ T22] ret_from_fork+0x10/0x20 [ 81.001241][ T22] [ 81.001649][ T22] Freed by task 22: [ 81.002118][ T22] kasan_save_stack+0x28/0x60 [ 81.002699][ T22] kasan_set_track+0x28/0x3c [ 81.003261][ T22] kasan_set_free_info+0x20/0x30 [ 81.003833][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 81.004476][ T22] __kasan_slab_free+0x10/0x1c [ 81.005006][ T22] slab_free_freelist_hook+0xc4/0x20c [ 81.005590][ T22] kmem_cache_free+0x9c/0x3d4 [ 81.006139][ T22] putname.part.0+0x68/0x7c [ 81.006675][ T22] kern_path_locked+0x64/0x10c [ 81.007205][ T22] handle_remove+0x38/0x284 [ 81.007727][ T22] devtmpfsd+0x8c/0xd0 [ 81.008215][ T22] kthread+0x150/0x15c [ 81.008708][ T22] ret_from_fork+0x10/0x20 [ 81.009260][ T22] [ 81.009678][ T22] The buggy address belongs to the object at ffff000002afa080 [ 81.009678][ T22] which belongs to the cache names_cache of size 4096 [ 81.010884][ T22] The buggy address is located 32 bytes inside of [ 81.010884][ T22] 4096-byte region [ffff000002afa080, ffff000002afb080) [ 81.012017][ T22] The buggy address belongs to the page: [ 81.012741][ T22] page:0000000003e878b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf9ff000002afb0c0 pfn:0x42af8 [ 81.013894][ T22] head:0000000003e878b0 order:3 compound_mapcount:0 compound_pincount:0 [ 81.014729][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 81.015964][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f9ff000002837700 [ 81.016811][ T22] raw: f9ff000002afb0c0 0000000080070004 00000001ffffffff 0000000000000000 [ 81.017660][ T22] page dumped because: kasan: bad access detected [ 81.018321][ T22] [ 81.018683][ T22] Memory state around the buggy address: [ 81.019414][ T22] ffff000002af9e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 81.020213][ T22] ffff000002af9f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 81.020744][ T22] >ffff000002afa000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 81.021258][ T22] ^ [ 81.021775][ T22] ffff000002afa100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 81.022371][ T22] ffff000002afa200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 81.022922][ T22] ================================================================== [ 81.023446][ T22] Disabling lock debugging due to kernel taint [ 81.814535][ T1760] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 81.917934][ T1760] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 82.276458][ T1760] bond0 (unregistering): Released all slaves executing program executing program executing program [ 90.725981][ T2202] can: request_module (can-proto-0) failed. [ 90.854065][ T2202] can: request_module (can-proto-0) failed. [ 90.943122][ T2202] can: request_module (can-proto-0) failed. executing program executing program [ 99.661967][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 99.665329][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 99.668438][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 99.672830][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 09:23:15 Registers: info registers vcpu 0 PC=000000000002e11c X00=0000ffff6fead000 X01=0000000000000000 X02=0000000000e38a60 X03=0000000000014e40 X04=0000000000000009 X05=0000000000000007 X06=0000004000286120 X07=0000000000000008 X08=0000000000000001 X09=0000ffff6fe020ec X10=0000000000000000 X11=0016a65700000000 X12=000000012fd21cee X13=000000007fffffff X14=0000000000000000 X15=0000000000000000 X16=00000040004d5f28 X17=0000000000073f74 X18=0000000000000000 X19=0000000000073f73 X20=00000040004d5ed0 X21=00000040004aa400 X22=00000040004c8000 X23=0000000000000000 X24=0000000000000000 X25=0000000000000000 X26=000000000049f320 X27=ffffffffffffffd0 X28=000000400029c900 X29=00000040004d5de8 X30=000000000002e11c SP=00000040004d5df0 PSTATE=80000000 N--- EL0t 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=0000000000000000:3fd3333333333333 Z01=0000000000000000:3fb6cdccedb18343 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:3ff0000000000000 Z04=0000000000000000:3ff0000000000000 Z05=0000000000000000:3fd3333333333333 Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3ff2acbc23870a48 Z08=0000000000000000:3fbd2fe501d8fec8 Z09=0000000000000000:3fe309aa704efc47 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=0000000000000000:0000000064a36170 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800010287868 X00=0000000000000000 X01=00007bffdfffffff X02=0000000000000000 X03=0000000000000000 X04=0000000000015ff5 X05=ffff00007fbcf9c8 X06=0000000000000000 X07=ffff8000122fd240 X08=ffff80001224d240 X09=ffff8000122fd240 X10=00000000ffffe000 X11=ffff8000122fd240 X12=ffff8000126ab610 X13=0000000000000309 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303178302f6364 X18=00000000fffffffd X19=ffff800011e28ca0 X20=f1ff000002afa0a0 X21=00000000000000f1 X22=ffff8000117a0ddc X23=ffff000002afa0a0 X24=0000000000000000 X25=ffff800011fd2000 X26=0000000000000000 X27=0000000000000000 X28=f3ff0000029a0000 X29=ffff8000126ab900 X30=ffff800010287810 SP=ffff8000126ab900 PSTATE=404000c9 -Z-- EL2h BTYPE=0 FPCR=00000000 FPSR=00000000 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=616e666901822e66:6e6f632e70746e2f Z02=6361667265746e69:00000000883d656d Z03=0000000000000000:0000000000000000 Z04=0000000000000000:8020080200000000 Z05=0000000000000000:0000000000000000 Z06=0000000000000000:0000000000100000 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=00000000a00a1000:0000aa1000000000 Z18=0000000000000000:8020080200100000 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