syzkaller login: [ 85.710341][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 85.732835][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 90.261872][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:35315' (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:46473 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 [ 112.772414][ T2205] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 112.803089][ T2205] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 115.169343][ T2205] device hsr_slave_0 entered promiscuous mode [ 115.230736][ T2205] device hsr_slave_1 entered promiscuous mode [ 117.054181][ T2205] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 117.135354][ T2205] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 117.235678][ T2205] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 117.340869][ T2205] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 119.812775][ T2205] 8021q: adding VLAN 0 to HW filter on device bond0 [ 119.932547][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 119.944361][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 120.989816][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 121.006723][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 121.077519][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 121.099819][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready executing program [ 121.186069][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 121.278409][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 121.471094][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 121.480092][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 121.553318][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 121.563186][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 121.609192][ T2205] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 121.899352][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 121.901843][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 123.914423][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 123.938012][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 125.058060][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 125.063895][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 125.112537][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 125.118526][ T1812] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 125.133373][ T2205] device veth0_vlan entered promiscuous mode [ 125.237183][ T2205] device veth1_vlan entered promiscuous mode [ 125.536484][ T2468] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 125.555824][ T2468] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 125.606147][ T2205] device veth0_macvtap entered promiscuous mode [ 125.680022][ T2205] device veth1_macvtap entered promiscuous mode [ 125.912727][ T2542] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 125.928649][ T2542] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 125.944376][ T2542] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 125.953801][ T2542] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 126.014300][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 126.030307][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 126.084347][ T2205] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 126.086780][ T2205] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 126.087753][ T2205] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 126.088657][ T2205] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 126.747642][ T2205] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation executing program [ 127.693840][ T255] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:07 building call list... [ 128.036683][ T255] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 128.149153][ T255] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 128.326615][ T255] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 131.240083][ T255] device hsr_slave_0 left promiscuous mode [ 131.309584][ T255] device hsr_slave_1 left promiscuous mode [ 131.447644][ T255] device veth1_macvtap left promiscuous mode [ 131.448864][ T255] device veth0_macvtap left promiscuous mode [ 131.450591][ T255] device veth1_vlan left promiscuous mode [ 131.451690][ T255] device veth0_vlan left promiscuous mode [ 132.958728][ T22] ================================================================== [ 132.960926][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xddc/0xf000 [ 132.964229][ T22] Read at addr faff00000315e1a0 by task kdevtmpfs/22 [ 132.965361][ T22] Pointer tag: [fa], memory tag: [fe] [ 132.967318][ T22] [ 132.968680][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-11101-gc605c39677b9 #0 [ 132.971538][ T22] Hardware name: linux,dummy-virt (DT) [ 132.972740][ T22] Call trace: [ 132.973359][ T22] dump_backtrace+0x0/0x1ac [ 132.974296][ T22] show_stack+0x18/0x24 [ 132.975975][ T22] dump_stack_lvl+0x68/0x84 [ 132.976906][ T22] print_address_description+0x7c/0x2b4 [ 132.978044][ T22] kasan_report+0x134/0x380 [ 132.979043][ T22] __do_kernel_fault+0x128/0x1bc [ 132.980078][ T22] do_tag_check_fault+0x74/0x90 [ 132.980929][ T22] do_mem_abort+0x44/0xb4 [ 132.981644][ T22] el1_abort+0x40/0x60 [ 132.982544][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 132.983351][ T22] el1h_64_sync+0x78/0x7c [ 132.984047][ T22] __entry_tramp_text_end+0xddc/0xf000 [ 132.984891][ T22] d_lookup+0x44/0x70 [ 132.985582][ T22] lookup_dcache+0x24/0x84 [ 132.986253][ T22] __lookup_hash+0x24/0xd0 [ 132.986969][ T22] kern_path_locked+0x90/0x10c [ 132.987669][ T22] handle_remove+0x38/0x284 [ 132.988353][ T22] devtmpfsd+0x8c/0xd0 [ 132.988973][ T22] kthread+0x150/0x15c [ 132.989585][ T22] ret_from_fork+0x10/0x20 [ 132.990466][ T22] [ 132.991014][ T22] Allocated by task 22: [ 132.991712][ T22] kasan_save_stack+0x28/0x60 [ 132.992563][ T22] __kasan_slab_alloc+0xb0/0x110 [ 132.993277][ T22] kmem_cache_alloc+0x194/0x2f4 [ 132.993992][ T22] getname_kernel+0x30/0x150 [ 132.995178][ T22] kern_path_locked+0x2c/0x10c [ 132.996014][ T22] handle_remove+0x38/0x284 [ 132.996691][ T22] devtmpfsd+0x8c/0xd0 [ 132.997528][ T22] kthread+0x150/0x15c [ 132.998249][ T22] ret_from_fork+0x10/0x20 [ 132.999164][ T22] [ 132.999701][ T22] Freed by task 22: [ 133.000482][ T22] kasan_save_stack+0x28/0x60 [ 133.001420][ T22] kasan_set_track+0x28/0x3c [ 133.002276][ T22] kasan_set_free_info+0x20/0x30 [ 133.003349][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 133.004572][ T22] __kasan_slab_free+0x10/0x1c [ 133.005398][ T22] slab_free_freelist_hook+0xc4/0x20c [ 133.006417][ T22] kmem_cache_free+0x9c/0x3d4 [ 133.007426][ T22] putname.part.0+0x68/0x7c [ 133.008482][ T22] kern_path_locked+0x64/0x10c [ 133.009414][ T22] handle_remove+0x38/0x284 [ 133.010280][ T22] devtmpfsd+0x8c/0xd0 [ 133.011045][ T22] kthread+0x150/0x15c [ 133.011837][ T22] ret_from_fork+0x10/0x20 [ 133.012863][ T22] [ 133.013391][ T22] The buggy address belongs to the object at ffff00000315e180 [ 133.013391][ T22] which belongs to the cache names_cache of size 4096 [ 133.015898][ T22] The buggy address is located 32 bytes inside of [ 133.015898][ T22] 4096-byte region [ffff00000315e180, ffff00000315f180) [ 133.017262][ T22] The buggy address belongs to the page: [ 133.018814][ T22] page:00000000ef95495a refcount:1 mapcount:0 mapping:0000000000000000 index:0xf0ff00000315a080 pfn:0x43158 [ 133.020253][ T22] head:00000000ef95495a order:3 compound_mapcount:0 compound_pincount:0 [ 133.021785][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 133.024404][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f6ff000002837700 [ 133.025786][ T22] raw: f0ff00000315a080 0000000080070003 00000001ffffffff 0000000000000000 [ 133.027416][ T22] page dumped because: kasan: bad access detected [ 133.028253][ T22] [ 133.028709][ T22] Memory state around the buggy address: [ 133.029562][ T22] ffff00000315df00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 133.030776][ T22] ffff00000315e000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 133.031733][ T22] >ffff00000315e100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 133.032626][ T22] ^ [ 133.033472][ T22] ffff00000315e200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 133.034413][ T22] ffff00000315e300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 133.035594][ T22] ================================================================== [ 133.036782][ T22] Disabling lock debugging due to kernel taint executing program [ 134.270997][ T255] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 134.429150][ T255] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 135.231863][ T255] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program [ 150.942657][ T2197] can: request_module (can-proto-0) failed. executing program [ 151.177361][ T2197] can: request_module (can-proto-0) failed. [ 151.313795][ T2197] can: request_module (can-proto-0) failed. executing program executing program executing program [ 160.132199][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 160.146497][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 160.153471][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 160.163476][ T2043] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 17:49:24 Registers: info registers vcpu 0 PC=ffff8000100d78e0 X00=0000000000000001 X01=00000000000003be X02=0000000002b37775 X03=0000000000000db0 X04=0000000000000db0 X05=000000000000b8c5 X06=00000000000003e0 X07=f9ff0000055ab800 X08=f9ff0000055ab880 X09=0000000009e1342e X10=0000000000000247 X11=0000000000000003 X12=0000000000000001 X13=0000000000000001 X14=0000000000000247 X15=00009e5b4e0783ae X16=0000000000000000 X17=0000000000000000 X18=0000000000000000 X19=f9ff0000055ab800 X20=ffff00007b6aa180 X21=0000001a5f491e00 X22=0000000000000001 X23=0000000000000000 X24=ffff00007fbc1b00 X25=0000000000000001 X26=ffff00007fbc1b80 X27=0000000000000003 X28=0000000000000009 X29=ffff800012893b60 X30=ffff8000100d78e0 SP=ffff800012893b60 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=0000000000000000:0000000000000000 Z01=0000000000000000:4115f22000000000 Z02=ff41e0e14e2acafc:bbacd08ffa4bf8e9 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=0000000000000010:00000017b0a5f570 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800010105a00 X00=00000000000000c0 X01=00000000ffffe308 X02=80000000ffffe308 X03=ffff800012301b00 X04=00000000ffffe308 X05=ffff8000126ab710 X06=00000000ffffe308 X07=ffff8000126ab900 X08=0000000000000033 X09=ffff8000126ab900 X10=000000000000000a X11=ffff80001224d230 X12=fffffffffff8c2b7 X13=0000000000000308 X14=0000000000000001 X15=0000000000000010 X16=6478302b646e655f X17=30306678302f6364 X18=fffffffffffcc2b8 X19=ffff00007fbcf9e1 X20=0000000000000000 X21=0000000000000000 X22=0000000000000000 X23=ffff800011e28ea0 X24=00000000000000c0 X25=0000000000000004 X26=0000000000000016 X27=ffff8000126ab710 X28=0000000000000000 X29=ffff8000126ab640 X30=d6b68000101065a4 SP=ffff8000126ab640 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=0000000000000000:3fd68fd00ce1b66e Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:4122102000000000 Z04=0000000000000000:3fefde6e279cb1f3 Z05=0000000000000000:3fe0ab3af4697ec0 Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3fc5903c99783964 Z09=0000000000000000:3fe549ca5d6b6c98 Z10=0000000000000000:3fe0000000000000 Z11=0000000000000000:c10ea2349452524c Z12=0000000000000000:1f2bfeb983ab2a6c Z13=0000000000000000:37a73693b1ed90a3 Z14=0000000000000000:86a206bf28a9f94e Z15=0000000000000000:83e520b0da37d7ff 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:00000000a244d4be Z31=0000000000000000:0000000000000000