syzkaller login: [ 85.567211][ T2045] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 85.580234][ T2045] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 90.201637][ T2045] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:25688' (ECDSA) to the list of known hosts. 1970/01/01 00:01:42 fuzzer started 1970/01/01 00:01:45 connecting to host at localhost:41239 1970/01/01 00:01:45 checking machine... 1970/01/01 00:01:45 checking revisions... 1970/01/01 00:01:46 testing simple program... executing program executing program [ 113.365458][ T2207] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 113.400951][ T2207] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 116.074643][ T2207] device hsr_slave_0 entered promiscuous mode [ 116.134705][ T2207] device hsr_slave_1 entered promiscuous mode executing program [ 118.528872][ T2207] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 118.626110][ T2207] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 118.706828][ T2207] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 118.812020][ T2207] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 120.828326][ T2207] 8021q: adding VLAN 0 to HW filter on device bond0 [ 120.948402][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 120.957932][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 121.882918][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 121.894134][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 121.955405][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 121.963395][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 122.031194][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 122.090353][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 122.261053][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 122.267649][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 122.326620][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 122.336251][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 122.431383][ T2207] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 122.645911][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 122.648474][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 124.586444][ T1622] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 124.596473][ T1622] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 125.738152][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 125.758405][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 125.787820][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 125.806974][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 125.855137][ T2207] device veth0_vlan entered promiscuous mode [ 125.998499][ T2207] device veth1_vlan entered promiscuous mode [ 126.335572][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 126.345404][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 126.403194][ T2207] device veth0_macvtap entered promiscuous mode [ 126.482719][ T2207] device veth1_macvtap entered promiscuous mode [ 126.744297][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 126.777800][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 126.791062][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 126.804290][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 126.876668][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 126.887701][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 126.964246][ T2207] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 126.968332][ T2207] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 126.971725][ T2207] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 126.972978][ T2207] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 127.733439][ T2207] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 128.637901][ T266] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:08 building call list... [ 128.846023][ T266] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 129.015670][ T266] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 129.175643][ T266] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 132.131188][ T266] device hsr_slave_0 left promiscuous mode [ 132.172913][ T266] device hsr_slave_1 left promiscuous mode [ 132.320540][ T266] device veth1_macvtap left promiscuous mode [ 132.321973][ T266] device veth0_macvtap left promiscuous mode [ 132.335572][ T266] device veth1_vlan left promiscuous mode [ 132.336744][ T266] device veth0_vlan left promiscuous mode executing program [ 134.078965][ T22] ================================================================== [ 134.080253][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xddc/0xd000 [ 134.081943][ T22] Read at addr fbff000002b9d160 by task kdevtmpfs/22 [ 134.083032][ T22] Pointer tag: [fb], memory tag: [fe] [ 134.084393][ T22] [ 134.085482][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-10943-g926de8c4326c #0 [ 134.086624][ T22] Hardware name: linux,dummy-virt (DT) [ 134.087595][ T22] Call trace: [ 134.088095][ T22] dump_backtrace+0x0/0x1ac [ 134.088623][ T22] show_stack+0x18/0x24 [ 134.089032][ T22] dump_stack_lvl+0x68/0x84 [ 134.089591][ T22] print_address_description+0x7c/0x2b4 [ 134.090361][ T22] kasan_report+0x134/0x380 [ 134.090771][ T22] __do_kernel_fault+0x128/0x1bc [ 134.091265][ T22] do_tag_check_fault+0x74/0x90 [ 134.091690][ T22] do_mem_abort+0x44/0xb4 [ 134.092111][ T22] el1_abort+0x40/0x60 [ 134.092497][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 134.092923][ T22] el1h_64_sync+0x78/0x7c [ 134.093330][ T22] __entry_tramp_text_end+0xddc/0xd000 [ 134.093783][ T22] d_lookup+0x44/0x70 [ 134.094170][ T22] lookup_dcache+0x24/0x84 [ 134.094804][ T22] __lookup_hash+0x24/0xd0 [ 134.095254][ T22] kern_path_locked+0x90/0x10c [ 134.095741][ T22] handle_remove+0x38/0x284 [ 134.096391][ T22] devtmpfsd+0x8c/0xd0 [ 134.096993][ T22] kthread+0x150/0x15c [ 134.097619][ T22] ret_from_fork+0x10/0x20 [ 134.098916][ T22] [ 134.099801][ T22] Allocated by task 22: [ 134.100514][ T22] kasan_save_stack+0x28/0x60 [ 134.101192][ T22] __kasan_slab_alloc+0xb0/0x110 [ 134.101761][ T22] kmem_cache_alloc+0x194/0x2f4 [ 134.102337][ T22] getname_kernel+0x30/0x150 [ 134.102926][ T22] kern_path_locked+0x2c/0x10c [ 134.103486][ T22] handle_remove+0x38/0x284 [ 134.104025][ T22] devtmpfsd+0x8c/0xd0 [ 134.104562][ T22] kthread+0x150/0x15c [ 134.105079][ T22] ret_from_fork+0x10/0x20 [ 134.105697][ T22] [ 134.106103][ T22] Freed by task 22: [ 134.106568][ T22] kasan_save_stack+0x28/0x60 [ 134.107207][ T22] kasan_set_track+0x28/0x3c [ 134.107819][ T22] kasan_set_free_info+0x20/0x30 [ 134.108465][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 134.109355][ T22] __kasan_slab_free+0x10/0x1c [ 134.110093][ T22] slab_free_freelist_hook+0xc4/0x20c [ 134.110828][ T22] kmem_cache_free+0x9c/0x3d4 [ 134.111419][ T22] putname.part.0+0x68/0x7c [ 134.111977][ T22] kern_path_locked+0x64/0x10c [ 134.112561][ T22] handle_remove+0x38/0x284 [ 134.113113][ T22] devtmpfsd+0x8c/0xd0 [ 134.113651][ T22] kthread+0x150/0x15c [ 134.114176][ T22] ret_from_fork+0x10/0x20 [ 134.114776][ T22] [ 134.115177][ T22] The buggy address belongs to the object at ffff000002b9d140 [ 134.115177][ T22] which belongs to the cache names_cache of size 4096 [ 134.116437][ T22] The buggy address is located 32 bytes inside of [ 134.116437][ T22] 4096-byte region [ffff000002b9d140, ffff000002b9e140) [ 134.117662][ T22] The buggy address belongs to the page: [ 134.118401][ T22] page:000000001cd5d3c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0xfbff000002b9c100 pfn:0x42b98 [ 134.129367][ T22] head:000000001cd5d3c8 order:3 compound_mapcount:0 compound_pincount:0 [ 134.130443][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 134.131986][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 faff000002837700 [ 134.132917][ T22] raw: fbff000002b9c100 0000000080070005 00000001ffffffff 0000000000000000 [ 134.133833][ T22] page dumped because: kasan: bad access detected [ 134.134544][ T22] [ 134.134982][ T22] Memory state around the buggy address: [ 134.135817][ T22] ffff000002b9cf00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 134.136781][ T22] ffff000002b9d000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 134.137636][ T22] >ffff000002b9d100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 134.138462][ T22] ^ [ 134.139367][ T22] ffff000002b9d200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 134.140248][ T22] ffff000002b9d300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 134.141175][ T22] ================================================================== [ 134.142016][ T22] Disabling lock debugging due to kernel taint [ 135.488926][ T266] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 135.631647][ T266] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 136.323056][ T266] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program [ 152.670252][ T2202] can: request_module (can-proto-0) failed. [ 152.893942][ T2202] can: request_module (can-proto-0) failed. [ 153.138192][ T2202] can: request_module (can-proto-0) failed. executing program [ 155.462489][ T2045] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program executing program [ 162.316295][ T2045] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 162.341041][ T2045] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 162.348344][ T2045] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 21:18:51 Registers: info registers vcpu 0 PC=000000000002a794 X00=0000000000000000 X01=0000000000000004 X02=0000000000000001 X03=0000000000000000 X04=0000000000000001 X05=00000040002c6090 X06=0000000000000001 X07=0000000000000000 X08=0000ffff8d15e010 X09=0000000000000001 X10=00000040003c5018 X11=0010b07600000000 X12=00000001f629bb2e X13=000000007fffffff X14=00000000000000f4 X15=0000000000000000 X16=00000040004bdf38 X17=0000000000000008 X18=0000000000000000 X19=0000000000000058 X20=00000040004bdeb0 X21=0000004000172400 X22=0000004000316000 X23=0000000000000000 X24=0000000000000000 X25=0000000000000000 X26=000000000049f1a8 X27=0000000001403ce0 X28=0000004000001c80 X29=00000040004bdea8 X30=007e000000074dc0 SP=00000040004bde90 PSTATE=20000000 --C- 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=0000000000000000:3fd0000000000000 Z01=0000000000000000:0000000000000000 Z02=0000000000000000:3ff799999999999a Z03=0000000000000000:3fde666666666666 Z04=0000000000000000:3ff14525b7958c46 Z05=0000000000000000:3fe357183bf7e559 Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3fcd70c244fa838c Z09=0000000000000000:3fe5cdab14aa62d6 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=0000000000000008:00000000e3a9fb24 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000117901a0 X00=ffff80001256f2c0 X01=00000000000000c0 X02=0000000000000000 X03=0000000000000000 X04=0000000000000000 X05=ffff80001245995f X06=302e34333120205b X07=205b5d3339333438 X08=000000000000005d X09=ffff8000126ab520 X10=000000000000005d X11=ffff800012301b18 X12=5b5d333933343830 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306478302f6364 X18=00000000fffffffd X19=0000000000000000 X20=00000000000000c0 X21=ffff8000121f8000 X22=ffff800012459de0 X23=ffff80001236e9f8 X24=0000000000000018 X25=ffff80001221ff90 X26=0000000000000000 X27=ffff800012459948 X28=ffff80001224d110 X29=ffff8000126ab5e0 X30=ffff8000106f576c SP=ffff8000126ab5e0 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=32111221aa4d12c3:b038c8c0217984f7 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=0000000000000010:00000017b365ae50 Z31=0000000000000000:0000000000000000