syzkaller login: [ 83.319894][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 83.326404][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 86.142137][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:26411' (ECDSA) to the list of known hosts. 1970/01/01 00:01:43 fuzzer started 1970/01/01 00:01:45 connecting to host at localhost:33137 1970/01/01 00:01:46 checking machine... 1970/01/01 00:01:46 checking revisions... 1970/01/01 00:01:47 testing simple program... executing program executing program [ 114.080350][ T2206] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 114.124476][ T2206] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 116.442210][ T2206] device hsr_slave_0 entered promiscuous mode [ 116.503805][ T2206] device hsr_slave_1 entered promiscuous mode executing program [ 118.802066][ T2206] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 118.941209][ T2206] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 119.039464][ T2206] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 119.156519][ T2206] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 120.956653][ T2206] 8021q: adding VLAN 0 to HW filter on device bond0 [ 121.069311][ T2353] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 121.084389][ T2353] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 121.997947][ T2353] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 122.005806][ T2353] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 122.084609][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 122.096187][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 122.174906][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 122.255528][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 122.429876][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 122.440948][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 122.515870][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 122.523920][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 122.578424][ T2206] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 122.833071][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 122.835295][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 124.845986][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 124.861437][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 125.904002][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 125.914014][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 125.949985][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 125.963603][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 125.995421][ T2206] device veth0_vlan entered promiscuous mode [ 126.122301][ T2206] device veth1_vlan entered promiscuous mode [ 126.470638][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 126.491028][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 126.545117][ T2206] device veth0_macvtap entered promiscuous mode [ 126.617475][ T2206] device veth1_macvtap entered promiscuous mode [ 126.834208][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 126.844285][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 126.861210][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 126.874980][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 126.965041][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 126.978816][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 127.061054][ T2206] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 127.064733][ T2206] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 127.066231][ T2206] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 127.070680][ T2206] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 127.782412][ T2206] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 128.558272][ T1852] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:08 building call list... [ 128.914252][ T1852] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 129.065132][ T1852] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 129.221693][ T1852] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 132.348473][ T1852] device hsr_slave_0 left promiscuous mode [ 132.400748][ T1852] device hsr_slave_1 left promiscuous mode [ 132.549292][ T1852] device veth1_macvtap left promiscuous mode [ 132.550569][ T1852] device veth0_macvtap left promiscuous mode [ 132.552497][ T1852] device veth1_vlan left promiscuous mode [ 132.554021][ T1852] device veth0_vlan left promiscuous mode executing program [ 133.999833][ T22] ================================================================== [ 134.002522][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xddc/0xc000 [ 134.004617][ T22] Read at addr f6ff0000029830e0 by task kdevtmpfs/22 [ 134.005526][ T22] Pointer tag: [f6], memory tag: [fe] [ 134.006277][ T22] [ 134.007695][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-10721-gf154c806676a #0 [ 134.009264][ T22] Hardware name: linux,dummy-virt (DT) [ 134.010329][ T22] Call trace: [ 134.010937][ T22] dump_backtrace+0x0/0x1ac [ 134.011749][ T22] show_stack+0x18/0x24 [ 134.012915][ T22] dump_stack_lvl+0x68/0x84 [ 134.013622][ T22] print_address_description+0x7c/0x2b4 [ 134.014424][ T22] kasan_report+0x134/0x380 [ 134.015141][ T22] __do_kernel_fault+0x128/0x1bc [ 134.015923][ T22] do_tag_check_fault+0x74/0x90 [ 134.016664][ T22] do_mem_abort+0x44/0xb4 [ 134.017580][ T22] el1_abort+0x40/0x60 [ 134.018308][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 134.019091][ T22] el1h_64_sync+0x78/0x7c [ 134.019859][ T22] __entry_tramp_text_end+0xddc/0xc000 [ 134.020634][ T22] d_lookup+0x44/0x70 [ 134.021260][ T22] lookup_dcache+0x24/0x84 [ 134.023527][ T22] __lookup_hash+0x24/0xd0 [ 134.024254][ T22] kern_path_locked+0x90/0x10c [ 134.025027][ T22] handle_remove+0x38/0x284 [ 134.025750][ T22] devtmpfsd+0x8c/0xd0 [ 134.026444][ T22] kthread+0x150/0x15c [ 134.027524][ T22] ret_from_fork+0x10/0x20 [ 134.028515][ T22] [ 134.029143][ T22] Allocated by task 22: [ 134.029917][ T22] kasan_save_stack+0x28/0x60 [ 134.030838][ T22] __kasan_slab_alloc+0xb0/0x110 [ 134.031703][ T22] kmem_cache_alloc+0x194/0x2f4 [ 134.032406][ T22] getname_kernel+0x30/0x150 [ 134.033155][ T22] kern_path_locked+0x2c/0x10c [ 134.033915][ T22] handle_remove+0x38/0x284 [ 134.034675][ T22] devtmpfsd+0x8c/0xd0 [ 134.035413][ T22] kthread+0x150/0x15c [ 134.035980][ T22] ret_from_fork+0x10/0x20 [ 134.036742][ T22] [ 134.037500][ T22] Freed by task 22: [ 134.038128][ T22] kasan_save_stack+0x28/0x60 [ 134.038854][ T22] kasan_set_track+0x28/0x3c [ 134.039672][ T22] kasan_set_free_info+0x20/0x30 [ 134.040425][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 134.041265][ T22] __kasan_slab_free+0x10/0x1c [ 134.042215][ T22] slab_free_freelist_hook+0xc4/0x20c [ 134.043018][ T22] kmem_cache_free+0x9c/0x3d4 [ 134.044927][ T22] putname.part.0+0x68/0x7c [ 134.045898][ T22] kern_path_locked+0x64/0x10c [ 134.048357][ T22] handle_remove+0x38/0x284 [ 134.049089][ T22] devtmpfsd+0x8c/0xd0 [ 134.049787][ T22] kthread+0x150/0x15c [ 134.050400][ T22] ret_from_fork+0x10/0x20 [ 134.051138][ T22] [ 134.051628][ T22] The buggy address belongs to the object at ffff0000029830c0 [ 134.051628][ T22] which belongs to the cache names_cache of size 4096 [ 134.053096][ T22] The buggy address is located 32 bytes inside of [ 134.053096][ T22] 4096-byte region [ffff0000029830c0, ffff0000029840c0) [ 134.054254][ T22] The buggy address belongs to the page: [ 134.055033][ T22] page:000000004ae9b8d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf3ff000002982080 pfn:0x42980 [ 134.056263][ T22] head:000000004ae9b8d1 order:3 compound_mapcount:0 compound_pincount:0 [ 134.057310][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 134.059054][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f8ff000002837700 [ 134.059894][ T22] raw: f3ff000002982080 0000000080070004 00000001ffffffff 0000000000000000 [ 134.060827][ T22] page dumped because: kasan: bad access detected [ 134.061396][ T22] [ 134.061720][ T22] Memory state around the buggy address: [ 134.062560][ T22] ffff000002982e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 134.063239][ T22] ffff000002982f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 134.063960][ T22] >ffff000002983000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 134.064674][ T22] ^ [ 134.065449][ T22] ffff000002983100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 134.066347][ T22] ffff000002983200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 134.068569][ T22] ================================================================== [ 134.069550][ T22] Disabling lock debugging due to kernel taint [ 135.100242][ T1852] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 135.254090][ T1852] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 135.819929][ T1852] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 152.323295][ T2198] can: request_module (can-proto-0) failed. [ 152.515484][ T2198] can: request_module (can-proto-0) failed. [ 152.664349][ T2198] can: request_module (can-proto-0) failed. executing program executing program [ 158.719140][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 158.724429][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 158.736417][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 160.566503][ T2044] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. executing program VM DIAGNOSIS: 20:10:33 Registers: info registers vcpu 0 PC=ffff800010150b70 X00=f4ff0000029a0000 X01=ffff80006d9c0000 X02=ffff8000121f8000 X03=ffff80001224d110 X04=00000000ffffffff X05=ffff8000124a23e0 X06=ffff8000124a23e0 X07=0000000000000018 X08=0000000080000000 X09=ffff8000122fd240 X10=00000000ffffe000 X11=ffff8000122fd240 X12=ffff8000126ab610 X13=0000000000000309 X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30306378302f6364 X18=00000000fffffffd X19=ffff800011e06f68 X20=00000000000000c0 X21=00000000000000f6 X22=ffff800011e28d18 X23=0000000000000000 X24=f4ff0000029a06d8 X25=0000000000000016 X26=0000000000000000 X27=0000000000000000 X28=f4ff0000029a0000 X29=ffff8000126ab850 X30=ffff8000105e8374 SP=ffff8000126ab830 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=0000000000000000:3fd3333333333333 Z01=0000000000000000:3fd1768237a8230c Z02=0000000000000000:3ff3333333333333 Z03=0000000000000000:3fde666666666666 Z04=0000000000000000:3ff12cddfd520769 Z05=0000000000000000:3fe32688c770db9f Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3fc912e1ae38adbc Z09=0000000000000000:3fe629d56a1b0eea 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=0000000000000000:00000000e19f0e39 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff8000105d1f84 X00=ffff8000124a1c50 X01=fcff0000042741a0 X02=0000000000000010 X03=0000000000000010 X04=f0ff000003023d00 X05=ffff80006d9d5000 X06=000000000000003f X07=000000000000003e X08=0000000000000230 X09=0000000000000001 X10=9dd45e1894332f61 X11=ffff800011e0ff50 X12=0000000000000000 X13=0000000000000001 X14=00000000000003a1 X15=0000000000000001 X16=0000000000000001 X17=0000000000000001 X18=0000000000008414 X19=ffff8000124a1c50 X20=000000000000001f X21=00000000000000e3 X22=0000000000000000 X23=ffff8000124a1c38 X24=f1ff000002c8d0a8 X25=ffff8000124a1c48 X26=ffff800012220000 X27=f8ff000002da9400 X28=f8ff000002da9464 X29=ffff800012a03c00 X30=ffff8000101fa4a0 SP=ffff800012a03c00 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:c1162e42fefa39ef Z02=5c81587c317d3ae0:b050e3d685985fea 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=0000000000000010:00000017d1fe3d30 Z31=0000000000000000:0000000000000000