syzkaller login: [ 104.473502][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 104.490666][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 104.501613][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:38599' (ECDSA) to the list of known hosts. 1970/01/01 00:02:04 fuzzer started 1970/01/01 00:02:09 connecting to host at localhost:41621 1970/01/01 00:02:09 checking machine... 1970/01/01 00:02:09 checking revisions... 1970/01/01 00:02:10 testing simple program... executing program executing program executing program [ 139.744418][ T3319] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 139.802314][ T3319] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link executing program [ 142.516684][ T3319] device hsr_slave_0 entered promiscuous mode [ 142.570885][ T3319] device hsr_slave_1 entered promiscuous mode [ 144.654120][ T3319] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 144.763873][ T3319] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 144.894286][ T3319] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 145.000345][ T3319] netdevsim netdevsim0 netdevsim3: renamed from eth3 executing program [ 147.351320][ T3319] 8021q: adding VLAN 0 to HW filter on device bond0 [ 147.478645][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 147.484119][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program [ 148.724090][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 148.778152][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 148.926896][ T2926] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 148.962471][ T2926] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 149.079085][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 149.245363][ T2926] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 149.567041][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 149.582611][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 149.708019][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 149.728851][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 150.131792][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 150.134706][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready executing program [ 153.376463][ T2926] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 153.403144][ T2926] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 155.377103][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 155.394743][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 155.505515][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 155.519412][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 155.648973][ T3319] device veth0_vlan entered promiscuous mode [ 155.922195][ T3319] device veth1_vlan entered promiscuous mode [ 156.366895][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 156.391052][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 156.503472][ T3319] device veth0_macvtap entered promiscuous mode [ 156.608456][ T3319] device veth1_macvtap entered promiscuous mode [ 157.083572][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 157.129589][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 157.193052][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 157.202712][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 157.314540][ T3319] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.316369][ T3319] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.318092][ T3319] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.320467][ T3319] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 158.327450][ T3319] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 159.410031][ T952] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:02:38 building call list... [ 159.599174][ T952] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.796520][ T952] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.982486][ T952] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 163.366414][ T952] device hsr_slave_0 left promiscuous mode [ 163.408847][ T952] device hsr_slave_1 left promiscuous mode executing program [ 163.579576][ T952] device veth1_macvtap left promiscuous mode [ 163.580830][ T952] device veth0_macvtap left promiscuous mode [ 163.582590][ T952] device veth1_vlan left promiscuous mode [ 163.583701][ T952] device veth0_vlan left promiscuous mode [ 165.037867][ T22] ================================================================== [ 165.038987][ T22] BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x5000 [ 165.040683][ T22] Read at addr f8ff0000029d0020 by task kdevtmpfs/22 [ 165.042121][ T22] Pointer tag: [f8], memory tag: [fe] [ 165.043434][ T22] [ 165.044166][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-01100-gb91db6a0b52e #0 [ 165.045332][ T22] Hardware name: linux,dummy-virt (DT) [ 165.046473][ T22] Call trace: [ 165.047036][ T22] dump_backtrace+0x0/0x1b0 [ 165.047803][ T22] show_stack+0x18/0x24 [ 165.048400][ T22] dump_stack_lvl+0x68/0x84 [ 165.049076][ T22] print_address_description+0x7c/0x2b4 [ 165.049856][ T22] kasan_report+0x134/0x380 [ 165.050610][ T22] __do_kernel_fault+0x1a8/0x1dc [ 165.051320][ T22] do_tag_check_fault+0x74/0x90 [ 165.052081][ T22] do_mem_abort+0x44/0xb4 [ 165.052811][ T22] el1_abort+0x40/0x60 [ 165.054849][ T22] el1h_64_sync_handler+0xb0/0xd0 [ 165.055686][ T22] el1h_64_sync+0x78/0x7c [ 165.056293][ T22] __entry_tramp_text_end+0xdfc/0x5000 [ 165.057061][ T22] d_lookup+0x44/0x70 [ 165.057788][ T22] lookup_dcache+0x24/0x84 [ 165.058507][ T22] __lookup_hash+0x24/0xd0 [ 165.060976][ T22] kern_path_locked+0x90/0x10c [ 165.063574][ T22] handle_remove+0x38/0x284 [ 165.064552][ T22] devtmpfsd+0x8c/0xd0 [ 165.065166][ T22] kthread+0x150/0x15c [ 165.065959][ T22] ret_from_fork+0x10/0x18 [ 165.066913][ T22] [ 165.067441][ T22] Allocated by task 22: [ 165.068167][ T22] kasan_save_stack+0x28/0x60 [ 165.069117][ T22] __kasan_slab_alloc+0xb0/0x110 [ 165.070569][ T22] kmem_cache_alloc+0x1cc/0x340 [ 165.071399][ T22] getname_kernel+0x30/0x150 [ 165.072870][ T22] kern_path_locked+0x2c/0x10c [ 165.073877][ T22] handle_remove+0x38/0x284 [ 165.075462][ T22] devtmpfsd+0x8c/0xd0 [ 165.076261][ T22] kthread+0x150/0x15c [ 165.076933][ T22] ret_from_fork+0x10/0x18 [ 165.077960][ T22] [ 165.078855][ T22] Freed by task 22: [ 165.080909][ T22] kasan_save_stack+0x28/0x60 [ 165.083627][ T22] kasan_set_track+0x28/0x3c [ 165.086251][ T22] kasan_set_free_info+0x20/0x30 [ 165.088925][ T22] ____kasan_slab_free.constprop.0+0x178/0x1e0 [ 165.092229][ T22] __kasan_slab_free+0x10/0x1c [ 165.094560][ T22] slab_free_freelist_hook+0xc4/0x20c [ 165.095489][ T22] kmem_cache_free+0x9c/0x420 [ 165.096272][ T22] putname.part.0+0x68/0x7c [ 165.096966][ T22] kern_path_locked+0x64/0x10c [ 165.097803][ T22] handle_remove+0x38/0x284 [ 165.098620][ T22] devtmpfsd+0x8c/0xd0 [ 165.099326][ T22] kthread+0x150/0x15c [ 165.100115][ T22] ret_from_fork+0x10/0x18 [ 165.101101][ T22] [ 165.101711][ T22] The buggy address belongs to the object at ffff0000029d0000 [ 165.101711][ T22] which belongs to the cache names_cache of size 4096 [ 165.108640][ T22] The buggy address is located 32 bytes inside of [ 165.108640][ T22] 4096-byte region [ffff0000029d0000, ffff0000029d1000) [ 165.114547][ T22] The buggy address belongs to the page: [ 165.116841][ T22] page:00000000c974e70a refcount:1 mapcount:0 mapping:0000000000000000 index:0xfcff0000029d2080 pfn:0x429d0 [ 165.118684][ T22] head:00000000c974e70a order:3 compound_mapcount:0 compound_pincount:0 [ 165.120214][ T22] flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) [ 165.122343][ T22] raw: 01ffc00000010200 0000000000000000 dead000000000122 f1ff000002837700 [ 165.123812][ T22] raw: fcff0000029d2080 0000000080070004 00000001ffffffff 0000000000000000 [ 165.125232][ T22] page dumped because: kasan: bad access detected [ 165.126382][ T22] [ 165.127105][ T22] Memory state around the buggy address: [ 165.128328][ T22] ffff0000029cfe00: f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 [ 165.129712][ T22] ffff0000029cff00: f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 [ 165.130898][ T22] >ffff0000029d0000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 165.132106][ T22] ^ [ 165.134876][ T22] ffff0000029d0100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 165.139145][ T22] ffff0000029d0200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe [ 165.143102][ T22] ================================================================== [ 165.144600][ T22] Disabling lock debugging due to kernel taint executing program [ 166.442850][ T952] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 166.622036][ T952] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 167.281151][ T952] bond0 (unregistering): Released all slaves executing program executing program executing program executing program executing program executing program [ 186.809242][ T3315] can: request_module (can-proto-0) failed. [ 187.011719][ T3315] can: request_module (can-proto-0) failed. [ 187.163134][ T3315] can: request_module (can-proto-0) failed. executing program executing program executing program [ 193.519873][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 193.530802][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 193.542658][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 193.551857][ T3157] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. VM DIAGNOSIS: 11:47:18 Registers: info registers vcpu 0 PC=ffff80001175abbc X00=00000000000000e0 X01=ffff00007fba3a20 X02=00000000000055bf X03=0000000000000000 X04=0000000000007ad8 X05=00ffffffffffffff X06=00000002695f6e00 X07=000000000000000c X08=ffff8000121fa6b8 X09=862a35822e84565a X10=2441a10de53a3526 X11=ffff800011dc1b40 X12=0000000000000000 X13=0000000000000001 X14=0000000000000189 X15=00002d0f4a038318 X16=0000000000000000 X17=0000000000000000 X18=00000000fffffffd X19=0000000000000000 X20=ffff8000121dff90 X21=ffff8000121e0010 X22=ffff8000121bc4a8 X23=ffff8000121e0054 X24=0000000000000000 X25=0000000000000000 X26=ffff8000121f9800 X27=0000000000000000 X28=00000000422c0018 X29=ffff8000121d3d60 X30=86a380001175abd8 SP=ffff8000121d3d60 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=0000000000000000:0000000000000000 Z01=0000000000000000:c1162e42fefa39ef Z02=95ca3ca315dbc4a0:d25d8a0610416ba7 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=0000000000000010:0000001cdfca6000 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff80001173b9b0 X00=ffff0000029d0020 X01=00000000000000f8 X02=00000000c0000000 X03=0000000000000001 X04=0000000000000001 X05=ffff800012461508 X06=ffff800012461508 X07=0000000000000018 X08=0000000080000000 X09=ffff8000122bd118 X10=00000000ffffe000 X11=ffff8000122bd118 X12=ffff80001266b5e0 X13=000000000000030a X14=0000000000000000 X15=0000000000000020 X16=6478302b646e655f X17=30303578302f6366 X18=00000000fffffffd X19=ffff800011dda368 X20=f8ff0000029d0020 X21=00000000000000f8 X22=ffff80001177bdfc X23=ffff0000029d0020 X24=0000000000000000 X25=f2ff000006478820 X26=0000000000000000 X27=0000000000000000 X28=f3ff0000029a0000 X29=ffff80001266b900 X30=ffff800010286094 SP=ffff80001266b900 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=0000000000000000:3fdd35d4b0a6f78e Z01=0000000000000000:3fd0000000000000 Z02=0000000000000000:3f81ae51d6999e7c Z03=0000000000000000:3fde666666666666 Z04=0000000000000000:3ff0babd50241764 Z05=0000000000000000:3fe242476d14fb95 Z06=0000000000000000:3fd3333333333333 Z07=0000000000000000:3feaaaaaaaaaaaab Z08=0000000000000000:3fc6d8c9539e893c Z09=0000000000000000:3fe5f317465d2d5c 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=0000000000000000:000000002b28d04f Z31=0000000000000000:0000000000000000