syzkaller login: [ 99.428404][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 99.436263][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 99.464549][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:5668' (ECDSA) to the list of known hosts. 1970/01/01 00:01:58 fuzzer started 1970/01/01 00:02:01 connecting to host at localhost:34585 1970/01/01 00:02:01 checking machine... 1970/01/01 00:02:01 checking revisions... 1970/01/01 00:02:03 testing simple program... executing program executing program [ 130.529394][ T3329] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 130.571172][ T3329] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 131.313714][ C0] hrtimer: interrupt took 131128160 ns executing program [ 133.670155][ T3329] device hsr_slave_0 entered promiscuous mode [ 133.734930][ T3329] device hsr_slave_1 entered promiscuous mode executing program [ 135.993007][ T3329] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 136.164846][ T3329] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 136.304198][ T3329] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 136.430727][ T3329] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 138.910515][ T3329] 8021q: adding VLAN 0 to HW filter on device bond0 [ 139.036204][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 139.047938][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 140.294987][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 140.333167][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 140.452624][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 140.472565][ T2937] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 140.575426][ T3508] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready executing program [ 140.676589][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 140.981486][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 141.014949][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 141.092498][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 141.113062][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 141.184915][ T3329] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 141.491391][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 141.494540][ T3646] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 143.923271][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 143.945463][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 145.144947][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 145.155241][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 145.176667][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 145.189982][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 145.273212][ T3329] device veth0_vlan entered promiscuous mode [ 145.373933][ T3329] device veth1_vlan entered promiscuous mode [ 145.829325][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 145.852216][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 145.923248][ T3329] device veth0_macvtap entered promiscuous mode [ 145.992236][ T3329] device veth1_macvtap entered promiscuous mode [ 146.153244][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 146.177923][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 146.271137][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 146.335188][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 146.406658][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 146.415360][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 146.476689][ T3329] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.477996][ T3329] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.489188][ T3329] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.493139][ T3329] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 147.436326][ T3329] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 148.264133][ T377] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 148.427018][ T377] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:27 building call list... [ 148.557448][ T377] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 148.712468][ T377] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 151.779337][ T377] device hsr_slave_0 left promiscuous mode [ 151.823836][ T377] device hsr_slave_1 left promiscuous mode [ 151.967000][ T377] device veth1_macvtap left promiscuous mode [ 151.971222][ T377] device veth0_macvtap left promiscuous mode [ 151.977761][ T377] device veth1_vlan left promiscuous mode [ 151.979941][ T377] device veth0_vlan left promiscuous mode executing program [ 153.450816][ T22] ================================================================== [ 153.451769][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x8000 [ 153.453248][ T22] Read at addr f5ff0000029be1a0 by task kdevtmpfs/22 [ 153.454201][ T22] Pointer tag: [f5], memory tag: [fe] [ 153.455318][ T22] [ 153.456600][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-07961-gaa829778b16f #0 [ 153.459982][ T22] Hardware name: linux,dummy-virt (DT) [ 153.462475][ T22] Call trace: [ 153.463668][ T22] dump_backtrace+0x0/0x1ac [ 153.464400][ T22] show_stack+0x18/0x24 [ 153.465031][ T22] dump_stack_lvl+0x68/0x84 [ 153.465670][ T22] print_address_description+0x7c/0x2b4 [ 153.466398][ T22] kasan_report+0x134/0x380 [ 153.467055][ T22] __do_kernel_fault+0x128/0x1bc [ 153.467695][ T22] do_tag_check_fault+0x74/0x90 [ 153.468476][ T22] do_mem_abort+0x44/0xb4 [ 153.469120][ T22] el1_abort+0x40/0x60 [ 153.469749][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 153.470441][ T22] el1h_64_sync+0x78/0x7c [ 153.471062][ T22] __entry_tramp_text_end+0xdfc/0x8000 [ 153.471794][ T22] d_lookup+0x44/0x70 [ 153.472421][ T22] lookup_dcache+0x24/0x84 [ 153.473060][ T22] __lookup_hash+0x24/0xd0 [ 153.473798][ T22] kern_path_locked+0x90/0x10c [ 153.474466][ T22] handle_remove+0x38/0x284 [ 153.475112][ T22] devtmpfsd+0x8c/0xd0 [ 153.475717][ T22] kthread+0x150/0x15c [ 153.476334][ T22] ret_from_fork+0x10/0x20 [ 153.477169][ T22] [ 153.477687][ T22] Allocated by task 22: [ 153.478950][ T22] kasan_save_stack+0x28/0x60 [ 153.480885][ T22] __kasan_slab_alloc+0xb0/0x110 [ 153.482768][ T22] kmem_cache_alloc+0x1cc/0x340 [ 153.483991][ T22] getname_kernel+0x30/0x150 [ 153.484773][ T22] kern_path_locked+0x2c/0x10c [ 153.486467][ T22] handle_remove+0x38/0x284 [ 153.488123][ T22] devtmpfsd+0x8c/0xd0 [ 153.490367][ T22] kthread+0x150/0x15c [ 153.491929][ T22] ret_from_fork+0x10/0x20 [ 153.493683][ T22] [ 153.494719][ T22] Freed by task 22: [ 153.496163][ T22] kasan_save_stack+0x28/0x60 [ 153.497975][ T22] kasan_set_track+0x28/0x3c [ 153.500448][ T22] kasan_set_free_info+0x20/0x30 [ 153.502343][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 153.504080][ T22] __kasan_slab_free+0x10/0x1c [ 153.505818][ T22] slab_free_freelist_hook+0xc4/0x20c [ 153.507775][ T22] kmem_cache_free+0x9c/0x420 [ 153.510372][ T22] putname.part.0+0x68/0x7c [ 153.512542][ T22] kern_path_locked+0x64/0x10c [ 153.514749][ T22] handle_remove+0x38/0x284 [ 153.516646][ T22] devtmpfsd+0x8c/0xd0 [ 153.518151][ T22] kthread+0x150/0x15c [ 153.520287][ T22] ret_from_fork+0x10/0x20 [ 153.521941][ T22] [ 153.522952][ T22] The buggy address belongs to the object at ffff0000029be180 [ 153.522952][ T22] which belongs to the cache names_cache of size 4096 [ 153.525053][ T22] The buggy address is located 32 bytes inside of [ 153.525053][ T22] 4096-byte region [ffff0000029be180, ffff0000029bf180) [ 153.529060][ T22] The buggy address belongs to the page: [ 153.531283][ T22] page:00000000659c5d27 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf6ff0000029b8000 pfn:0x429b8 [ 153.535108][ T22] head:00000000659c5d27 order:3 compound_mapcount:0 compound_pincount:0 [ 153.537964][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 153.542725][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f1ff000002837700 [ 153.544443][ T22] raw: f6ff0000029b8000 0000000080070001 00000001ffffffff 0000000000000000 [ 153.545596][ T22] page dumped because: kasan: bad access detected [ 153.547810][ T22] [ 153.549074][ T22] Memory state around the buggy address: [ 153.551656][ T22] ffff0000029bdf00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 153.554617][ T22] ffff0000029be000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 153.556958][ T22] >ffff0000029be100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 153.557752][ T22] ^ [ 153.558725][ T22] ffff0000029be200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 153.559578][ T22] ffff0000029be300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 153.560423][ T22] ================================================================== [ 153.561207][ T22] Disabling lock debugging due to kernel taint [ 154.805013][ T377] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 154.931734][ T377] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 155.672283][ T377] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 174.166084][ T3321] can: request_module (can-proto-0) failed. [ 174.356544][ T3321] can: request_module (can-proto-0) failed. [ 174.510758][ T3321] can: request_module (can-proto-0) failed. executing program executing program [ 182.479761][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 182.490103][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 182.504614][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 182.517159][ T3167] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 20:12:19 Registers: info registers vcpu 0 PC=ffff80001177867c X00=00000000000000e0 X01=ffff00007fbc3960 X02=00000000000053e7 X03=0000000000000000 X04=0000000000007302 X05=00ffffffffffffff X06=000000023e399f01 X07=000000000000000c X08=ffff80001220a708 X09=fa97baf7f78027fe X10=c44bba61991eab2f X11=ffff800011de9848 X12=0000000000000000 X13=0000000000000000 X14=000000000000016d X15=ffff8000113173b0 X16=ffff80001027f720 X17=ffff800011316dd4 X18=00000000fffffffd X19=0000000000000000 X20=ffff8000121f0010 X21=ffff8000121eff90 X22=ffff8000121d03e8 X23=ffff8000121f0054 X24=0000000000000000 X25=0000000000000000 X26=ffff800012209840 X27=0000000000000000 X28=00000000422f0018 X29=ffff8000121e3d60 X30=6cb5800011778698 SP=ffff8000121e3d60 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=0000000000000000:3f8435d483fa77ee Z01=0000000000000000:3f847ae147ae147b Z02=0000000000000000:41887e3953b1c529 Z03=0000000000000000:411fc50000000000 Z04=0000000000000000:3ff101b756fc9af6 Z05=0000000000000000:3fe2d03b7ac602b9 Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3fc9413f5f4e3684 Z09=0000000000000000:3fe5f9da56a8b98c 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=000000000000000e:00000000e0371843 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800011121c48 X00=ffff800011121c40 X01=0000000000000000 X02=0000000000000000 X03=ffff800011e2e6d0 X04=ffff80001267b6f0 X05=f6ff0000029a0000 X06=0000000000000000 X07=00000000ffffffc8 X08=ffff80001267b830 X09=ffff80001267b830 X10=00000000ffffe000 X11=ffff8000122cd160 X12=ffff80001267b610 X13=0000000000000310 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303878302f6366 X18=00000000fffffffd X19=ffff8000122ff108 X20=ffff8000122ff100 X21=0000000000000000 X22=0000000000000004 X23=ffff8000122ff108 X24=0000000000000028 X25=ffff800011e2e6d0 X26=0000000000000016 X27=0000000000000000 X28=f6ff0000029a0000 X29=ffff80001267b540 X30=5ae580001013d6a0 SP=ffff80001267b540 PSTATE=204000c9 --C- 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=bbd1607db9a24884:687f83c42582621d 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=0000000000000010:0000001b527588b0 Z31=0000000000000000:0000000000000000