syzkaller login: [ 107.310754][ T3170] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 107.338427][ T3170] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 107.360637][ T3170] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:50633' (ECDSA) to the list of known hosts. 1970/01/01 00:02:03 fuzzer started 1970/01/01 00:02:06 connecting to host at localhost:41195 1970/01/01 00:02:07 checking machine... 1970/01/01 00:02:07 checking revisions... 1970/01/01 00:02:08 testing simple program... executing program executing program [ 136.180068][ T3332] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 136.222551][ T3332] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 139.481619][ T3332] device hsr_slave_0 entered promiscuous mode [ 139.561745][ T3332] device hsr_slave_1 entered promiscuous mode executing program [ 141.652273][ T3332] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 141.799935][ T3332] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 141.912534][ T3332] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 142.063647][ T3332] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 144.397778][ T3332] 8021q: adding VLAN 0 to HW filter on device bond0 [ 144.537584][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 144.559129][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 146.058451][ T3102] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 146.078146][ T3102] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 146.139218][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 146.145909][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 146.251841][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 146.336512][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready executing program [ 146.595343][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 146.611885][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 146.678085][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 146.698077][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 146.798867][ T3332] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 147.001504][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 147.003719][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 149.660055][ T3102] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 149.672012][ T3102] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 151.039048][ T3648] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 151.057682][ T3648] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 151.081857][ T3648] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 151.096742][ T3648] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 151.135533][ T3332] device veth0_vlan entered promiscuous mode [ 151.293156][ T3332] device veth1_vlan entered promiscuous mode [ 151.610842][ T3648] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 151.621314][ T3648] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 151.693876][ T3332] device veth0_macvtap entered promiscuous mode [ 151.766696][ T3332] device veth1_macvtap entered promiscuous mode [ 152.023960][ T3102] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 152.069404][ T3102] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 152.081435][ T3102] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 152.091215][ T3102] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 152.189051][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 152.209180][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 152.279506][ T3332] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 152.281023][ T3332] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 152.282080][ T3332] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 152.283167][ T3332] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 153.112129][ T3332] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 153.982086][ T660] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:32 building call list... [ 154.229189][ T660] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 154.405629][ T660] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 154.653260][ T660] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 157.746327][ T660] device hsr_slave_0 left promiscuous mode [ 157.792728][ T660] device hsr_slave_1 left promiscuous mode [ 157.939462][ T660] device veth1_macvtap left promiscuous mode [ 157.940639][ T660] device veth0_macvtap left promiscuous mode [ 157.942363][ T660] device veth1_vlan left promiscuous mode [ 157.943453][ T660] device veth0_vlan left promiscuous mode executing program [ 159.556171][ T22] ================================================================== [ 159.557166][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x7000 [ 159.558814][ T22] Read at addr f1ff0000029820a0 by task kdevtmpfs/22 [ 159.560056][ T22] Pointer tag: [f1], memory tag: [fe] [ 159.560714][ T22] [ 159.563091][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-09718-g4b93c544e90e #0 [ 159.564437][ T22] Hardware name: linux,dummy-virt (DT) [ 159.565720][ T22] Call trace: [ 159.566419][ T22] dump_backtrace+0x0/0x1ac [ 159.567538][ T22] show_stack+0x18/0x24 [ 159.568261][ T22] dump_stack_lvl+0x68/0x84 [ 159.568957][ T22] print_address_description+0x7c/0x2b4 [ 159.569756][ T22] kasan_report+0x134/0x380 [ 159.570426][ T22] __do_kernel_fault+0x128/0x1bc [ 159.571081][ T22] do_tag_check_fault+0x74/0x90 [ 159.571731][ T22] do_mem_abort+0x44/0xb4 [ 159.572387][ T22] el1_abort+0x40/0x60 [ 159.572979][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 159.573706][ T22] el1h_64_sync+0x78/0x7c [ 159.580443][ T22] __entry_tramp_text_end+0xdfc/0x7000 [ 159.581206][ T22] d_lookup+0x44/0x70 [ 159.581833][ T22] lookup_dcache+0x24/0x84 [ 159.582492][ T22] __lookup_hash+0x24/0xd0 [ 159.583098][ T22] kern_path_locked+0x90/0x10c [ 159.583738][ T22] handle_remove+0x38/0x284 [ 159.584466][ T22] devtmpfsd+0x8c/0xd0 [ 159.585132][ T22] kthread+0x150/0x15c [ 159.585756][ T22] ret_from_fork+0x10/0x20 [ 159.586633][ T22] [ 159.587158][ T22] Allocated by task 22: [ 159.587801][ T22] kasan_save_stack+0x28/0x60 [ 159.588667][ T22] __kasan_slab_alloc+0xb0/0x110 [ 159.589342][ T22] kmem_cache_alloc+0x1cc/0x340 [ 159.589986][ T22] getname_kernel+0x30/0x150 [ 159.590651][ T22] kern_path_locked+0x2c/0x10c [ 159.591266][ T22] handle_remove+0x38/0x284 [ 159.591984][ T22] devtmpfsd+0x8c/0xd0 [ 159.592601][ T22] kthread+0x150/0x15c [ 159.593176][ T22] ret_from_fork+0x10/0x20 [ 159.593907][ T22] [ 159.594361][ T22] Freed by task 22: [ 159.594896][ T22] kasan_save_stack+0x28/0x60 [ 159.595650][ T22] kasan_set_track+0x28/0x3c [ 159.597153][ T22] kasan_set_free_info+0x20/0x30 [ 159.598824][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 159.600845][ T22] __kasan_slab_free+0x10/0x1c [ 159.602483][ T22] slab_free_freelist_hook+0xc4/0x20c [ 159.604687][ T22] kmem_cache_free+0x9c/0x420 [ 159.606396][ T22] putname.part.0+0x68/0x7c [ 159.607960][ T22] kern_path_locked+0x64/0x10c [ 159.608695][ T22] handle_remove+0x38/0x284 [ 159.609746][ T22] devtmpfsd+0x8c/0xd0 [ 159.611191][ T22] kthread+0x150/0x15c [ 159.612397][ T22] ret_from_fork+0x10/0x20 [ 159.613972][ T22] [ 159.614681][ T22] The buggy address belongs to the object at ffff000002982080 [ 159.614681][ T22] which belongs to the cache names_cache of size 4096 [ 159.617686][ T22] The buggy address is located 32 bytes inside of [ 159.617686][ T22] 4096-byte region [ffff000002982080, ffff000002983080) [ 159.619877][ T22] The buggy address belongs to the page: [ 159.622034][ T22] page:00000000c74fec19 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf8ff000002986180 pfn:0x42980 [ 159.624229][ T22] head:00000000c74fec19 order:3 compound_mapcount:0 compound_pincount:0 [ 159.626519][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 159.630015][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f0ff000002837700 [ 159.632570][ T22] raw: f8ff000002986180 0000000080070006 00000001ffffffff 0000000000000000 [ 159.633568][ T22] page dumped because: kasan: bad access detected [ 159.635236][ T22] [ 159.636388][ T22] Memory state around the buggy address: [ 159.639035][ T22] ffff000002981e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.640828][ T22] ffff000002981f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.642363][ T22] >ffff000002982000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.645441][ T22] ^ [ 159.647857][ T22] ffff000002982100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.650545][ T22] ffff000002982200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 159.652622][ T22] ================================================================== [ 159.653774][ T22] Disabling lock debugging due to kernel taint [ 160.810496][ T660] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 160.927156][ T660] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 161.413392][ T660] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program executing program [ 181.706508][ T3328] can: request_module (can-proto-0) failed. [ 182.056889][ T3328] can: request_module (can-proto-0) failed. [ 182.273749][ T3328] can: request_module (can-proto-0) failed. executing program executing program [ 187.210834][ T3170] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 187.227611][ T3170] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 187.239792][ T3170] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 187.252388][ T3170] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 20:02:14 Registers: info registers vcpu 0 PC=ffff80001077efb0 X00=00000000000000c0 X01=f2ff0000029a0000 X02=ffff8000125b5030 X03=0000000000000030 X04=0000000000000000 X05=ffff80001242995f X06=352e39353120205b X07=205b5d3431373036 X08=000000000000005d X09=ffff80001267b520 X10=000000000000005d X11=ffff8000122d1c08 X12=5b5d343137303635 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303778302f6366 X18=00000000fffffffd X19=f3ff000002bf0080 X20=ffff800012429948 X21=00000000000000c0 X22=0000000000000001 X23=0000000000000000 X24=0000000000000018 X25=ffff8000121eff90 X26=0000000000000000 X27=ffff800012429948 X28=ffff80001221d0b0 X29=ffff80001267b610 X30=748780001077f0e4 SP=ffff80001267b610 PSTATE=404008c9 -Z-- EL2h BTYPE=2 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=402fbd62cbaf385c:5d1a0af7cd798db9 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=0000000000000010:0000001c93104a10 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800011778c2c X00=00000000000000e0 X01=ffff00007fbd8960 X02=0000000000006f91 X03=0000000000000000 X04=00000000000076ea X05=00ffffffffffffff X06=0000000254c8b9ac X07=000000000000000c X08=fdff0000028ef988 X09=7b5b0abba066230e X10=845fc75168eaab8c X11=ffff800011dee1a8 X12=0000000000000001 X13=0000000000000000 X14=000000000000003c X15=0000a59bd9109776 X16=ffff8000102803f0 X17=ffff800011316194 X18=00000000fffffffd X19=0000000000000001 X20=ffff8000121f0010 X21=ffff8000121eff90 X22=ffff8000121d03e8 X23=ffff8000121f0054 X24=0000000000000000 X25=0000000000000000 X26=fdff0000028eeac0 X27=0000000000000000 X28=0000000000000000 X29=ffff800012643df0 X30=9ed3800011778c48 SP=ffff800012643df0 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=402fbd62cbaf385c:5d1a0af7cd798db9 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=0000000000000010:0000001c93104a10 Z31=0000000000000000:0000000000000000