syzkaller login: [ 91.393661][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 91.422894][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 91.437254][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:37931' (ECDSA) to the list of known hosts. 1970/01/01 00:01:48 fuzzer started 1970/01/01 00:01:51 connecting to host at localhost:34579 1970/01/01 00:01:51 checking machine... 1970/01/01 00:01:51 checking revisions... 1970/01/01 00:01:52 testing simple program... executing program executing program [ 118.606814][ T2206] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 118.641484][ T2206] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 120.881852][ T2206] device hsr_slave_0 entered promiscuous mode [ 120.943065][ T2206] device hsr_slave_1 entered promiscuous mode [ 123.064390][ T2206] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 123.203918][ T2206] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 123.292777][ T2206] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 123.396054][ T2206] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 125.624956][ T2206] 8021q: adding VLAN 0 to HW filter on device bond0 [ 125.820007][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 125.833046][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 126.884212][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 126.892332][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 126.956119][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 126.963312][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 127.019250][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 127.078109][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 127.256144][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 127.275344][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 127.357148][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 127.366451][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 127.413534][ T2206] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 127.640337][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 127.641755][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 130.023233][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 130.043966][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 131.138141][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 131.161302][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 131.190443][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 131.211478][ T1977] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 131.266054][ T2206] device veth0_vlan entered promiscuous mode [ 131.374979][ T2206] device veth1_vlan entered promiscuous mode [ 131.713687][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 131.725957][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 131.800275][ T2206] device veth0_macvtap entered promiscuous mode [ 131.884773][ T2206] device veth1_macvtap entered promiscuous mode [ 132.140861][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 132.151321][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 132.176001][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 132.187479][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 132.265139][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 132.272079][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 132.332325][ T2206] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 132.333250][ T2206] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 132.333956][ T2206] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 132.334687][ T2206] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 133.096344][ T2206] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 133.985038][ T2255] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 134.126829][ T2255] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:13 building call list... [ 134.272547][ T2255] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 134.466672][ T2255] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 137.557290][ T2255] device hsr_slave_0 left promiscuous mode [ 137.625396][ T2255] device hsr_slave_1 left promiscuous mode [ 137.773903][ T2255] device veth1_macvtap left promiscuous mode [ 137.775232][ T2255] device veth0_macvtap left promiscuous mode [ 137.776967][ T2255] device veth1_vlan left promiscuous mode [ 137.779273][ T2255] device veth0_vlan left promiscuous mode executing program [ 139.366349][ T22] ================================================================== [ 139.369470][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0xd000 [ 139.371682][ T22] Read at addr f6ff0000029830e0 by task kdevtmpfs/22 [ 139.372656][ T22] Pointer tag: [f6], memory tag: [fe] [ 139.374699][ T22] [ 139.376381][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-10448-g2d338201d531 #0 [ 139.379975][ T22] Hardware name: linux,dummy-virt (DT) [ 139.383222][ T22] Call trace: [ 139.384462][ T22] dump_backtrace+0x0/0x1ac [ 139.385334][ T22] show_stack+0x18/0x24 [ 139.386620][ T22] dump_stack_lvl+0x68/0x84 [ 139.388158][ T22] print_address_description+0x7c/0x2b4 [ 139.390463][ T22] kasan_report+0x134/0x380 [ 139.392496][ T22] __do_kernel_fault+0x128/0x1bc [ 139.393721][ T22] do_tag_check_fault+0x74/0x90 [ 139.395570][ T22] do_mem_abort+0x44/0xb4 [ 139.397109][ T22] el1_abort+0x40/0x60 [ 139.398568][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 139.399368][ T22] el1h_64_sync+0x78/0x7c [ 139.401158][ T22] __entry_tramp_text_end+0xdfc/0xd000 [ 139.404046][ T22] d_lookup+0x44/0x70 [ 139.404815][ T22] lookup_dcache+0x24/0x84 [ 139.405972][ T22] __lookup_hash+0x24/0xd0 [ 139.406592][ T22] kern_path_locked+0x90/0x10c [ 139.407241][ T22] handle_remove+0x38/0x284 [ 139.407889][ T22] devtmpfsd+0x8c/0xd0 [ 139.408641][ T22] kthread+0x150/0x15c [ 139.409326][ T22] ret_from_fork+0x10/0x20 [ 139.410192][ T22] [ 139.410700][ T22] Allocated by task 22: [ 139.411392][ T22] kasan_save_stack+0x28/0x60 [ 139.412217][ T22] __kasan_slab_alloc+0xb0/0x110 [ 139.412875][ T22] kmem_cache_alloc+0x194/0x2f4 [ 139.413525][ T22] getname_kernel+0x30/0x150 [ 139.414162][ T22] kern_path_locked+0x2c/0x10c [ 139.414794][ T22] handle_remove+0x38/0x284 [ 139.415410][ T22] devtmpfsd+0x8c/0xd0 [ 139.416024][ T22] kthread+0x150/0x15c [ 139.416621][ T22] ret_from_fork+0x10/0x20 [ 139.417303][ T22] [ 139.417746][ T22] Freed by task 22: [ 139.418406][ T22] kasan_save_stack+0x28/0x60 [ 139.419175][ T22] kasan_set_track+0x28/0x3c [ 139.419837][ T22] kasan_set_free_info+0x20/0x30 [ 139.420495][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 139.421240][ T22] __kasan_slab_free+0x10/0x1c [ 139.421890][ T22] slab_free_freelist_hook+0xc4/0x20c [ 139.422566][ T22] kmem_cache_free+0x9c/0x3d4 [ 139.423209][ T22] putname.part.0+0x68/0x7c [ 139.423849][ T22] kern_path_locked+0x64/0x10c [ 139.424481][ T22] handle_remove+0x38/0x284 [ 139.425128][ T22] devtmpfsd+0x8c/0xd0 [ 139.425713][ T22] kthread+0x150/0x15c [ 139.426303][ T22] ret_from_fork+0x10/0x20 [ 139.426925][ T22] [ 139.427315][ T22] The buggy address belongs to the object at ffff0000029830c0 [ 139.427315][ T22] which belongs to the cache names_cache of size 4096 [ 139.428802][ T22] The buggy address is located 32 bytes inside of [ 139.428802][ T22] 4096-byte region [ffff0000029830c0, ffff0000029840c0) [ 139.430124][ T22] The buggy address belongs to the page: [ 139.431009][ T22] page:00000000ee53ad48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42980 [ 139.432283][ T22] head:00000000ee53ad48 order:3 compound_mapcount:0 compound_pincount:0 [ 139.433201][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 139.434720][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f6ff000002837700 [ 139.435668][ T22] raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000 [ 139.436649][ T22] page dumped because: kasan: bad access detected [ 139.437364][ T22] [ 139.437784][ T22] Memory state around the buggy address: [ 139.438789][ T22] ffff000002982e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 139.439656][ T22] ffff000002982f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 139.440463][ T22] >ffff000002983000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 139.441198][ T22] ^ [ 139.441986][ T22] ffff000002983100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 139.442732][ T22] ffff000002983200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 139.443514][ T22] ================================================================== [ 139.444279][ T22] Disabling lock debugging due to kernel taint [ 140.556808][ T2255] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 140.695633][ T2255] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 141.233509][ T2255] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 158.213454][ T2198] can: request_module (can-proto-0) failed. [ 158.431563][ T2198] can: request_module (can-proto-0) failed. [ 158.599334][ T2198] can: request_module (can-proto-0) failed. executing program [ 161.564370][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 161.587021][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program [ 164.734680][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 164.742555][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program executing program VM DIAGNOSIS: 20:54:04 Registers: info registers vcpu 0 PC=ffff80001078124c X00=ffff8000125e5000 X01=0000000000000002 X02=0000000000000000 X03=0000000000000018 X04=f4ff000002b38880 X05=000000000000003a X06=332e39333120205b X07=205b5d3635363237 X08=726f6d656d202c5d X09=5b203a6761742079 X10=676174207265746e X11=202c5d36665b203a X12=5b5d363536323733 X13=205d323254202020 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306478302f6366 X18=00000000fffffffd X19=ffff80001245997d X20=ffff800010781224 X21=f4ff000002b38880 X22=ffff800012459983 X23=0000000000000f01 X24=000000000000003b X25=ffff80001221ff90 X26=0000000000000000 X27=ffff800012459948 X28=ffff80001224d110 X29=ffff8000126ab5c0 X30=ffff80001078124c SP=ffff8000126ab5c0 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:c1162e42fefa39ef Z02=78fd5faf10f5cd34:9b4b10aa42e28782 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=0000000000000010:00000018ffa7fd80 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000105fe7f0 X00=ffff800011e170e0 X01=0000000000000005 X02=f6ff0000091aaca8 X03=f6ff0000091aacb1 X04=0000000000000010 X05=00000000fffffffe X06=000000000000000f X07=000000000000000f X08=f6ff0000091aa000 X09=ffff800011dff238 X10=000000000000000a X11=0000000000000000 X12=f6ff0000091aaca1 X13=f6ff0000091ab000 X14=0000000000000000 X15=0000000000000030 X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=f6ff0000091ab000 X20=f6ff0000091aaca1 X21=ffff80001287bc50 X22=ffff8000118e7498 X23=00000000ffffffe8 X24=000000000000035f X25=0000000000000020 X26=ffff800011e170e9 X27=ffff800011e170e9 X28=f6ff0000091aacb4 X29=ffff80001287bb00 X30=3b8f8000105fba6c SP=ffff80001287bb00 PSTATE=80400009 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=0000000000000000:3fdd8c07f48e27e1 Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:412aa42000000000 Z04=0000000000000000:3febf5591969c233 Z05=0000000000000000:3fd9844bcc6d1e00 Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3f69d3ce031b4900 Z09=0000000000000000:3fe589833b2284aa Z10=0000000000000000:3fe0000000000000 Z11=0000000000000000:19b93d719face5a7 Z12=0000000000000000:776dcf2050a51e82 Z13=0000000000000000:f2bce894ea3fc97d Z14=0000000000000000:bb35beacd85c75b7 Z15=0000000000000000:10b04f819f54607b 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=000000000000000c:000000003e285ddb Z31=0000000000000000:0000000000000000