Warning: Permanently added '10.128.0.234' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 57.579842][ T7264] ================================================================== [ 57.588052][ T7264] BUG: KASAN: use-after-free in strnlen+0x63/0x80 [ 57.594464][ T7264] Read of size 1 at addr ffff88809f3e9c18 by task syz-executor276/7264 [ 57.602685][ T7264] [ 57.605010][ T7264] CPU: 0 PID: 7264 Comm: syz-executor276 Not tainted 5.8.0-rc2-syzkaller #0 [ 57.613729][ T7264] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.623761][ T7264] Call Trace: [ 57.627039][ T7264] dump_stack+0x1f0/0x31e [ 57.631371][ T7264] print_address_description+0x66/0x5a0 [ 57.636907][ T7264] ? vprintk_emit+0x342/0x3c0 [ 57.641585][ T7264] ? printk+0x62/0x83 [ 57.645552][ T7264] ? vprintk_emit+0x339/0x3c0 [ 57.650204][ T7264] kasan_report+0x132/0x1d0 [ 57.654684][ T7264] ? strnlen+0x63/0x80 [ 57.658733][ T7264] strnlen+0x63/0x80 [ 57.662604][ T7264] dev_get_by_name+0x9b/0x2a0 [ 57.667272][ T7264] wg_get_device_start+0x1fb/0x2d0 [ 57.672439][ T7264] genl_start+0x390/0x570 [ 57.676801][ T7264] __netlink_dump_start+0x3d2/0x700 [ 57.681997][ T7264] genl_rcv_msg+0xb03/0xe00 [ 57.686493][ T7264] ? genl_rcv_msg+0xe00/0xe00 [ 57.691148][ T7264] ? genl_start+0x570/0x570 [ 57.695625][ T7264] ? genl_lock_dumpit+0xa0/0xa0 [ 57.700456][ T7264] netlink_rcv_skb+0x190/0x3a0 [ 57.705194][ T7264] ? genl_unbind+0x270/0x270 [ 57.709768][ T7264] genl_rcv+0x24/0x40 [ 57.713722][ T7264] netlink_unicast+0x786/0x940 [ 57.718484][ T7264] netlink_sendmsg+0xa57/0xd70 [ 57.723275][ T7264] ? netlink_getsockopt+0x9e0/0x9e0 [ 57.728498][ T7264] ____sys_sendmsg+0x519/0x800 [ 57.733238][ T7264] ? import_iovec+0x12a/0x2c0 [ 57.737905][ T7264] __sys_sendmsg+0x2b1/0x360 [ 57.742512][ T7264] ? check_preemption_disabled+0x40/0x240 [ 57.748228][ T7264] ? check_preemption_disabled+0x40/0x240 [ 57.753969][ T7264] ? check_preemption_disabled+0x40/0x240 [ 57.759672][ T7264] ? do_syscall_64+0x1d/0xe0 [ 57.764244][ T7264] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.770293][ T7264] do_syscall_64+0x73/0xe0 [ 57.774708][ T7264] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.780587][ T7264] RIP: 0033:0x44a809 [ 57.784458][ T7264] Code: Bad RIP value. [ 57.788506][ T7264] RSP: 002b:00007fed6f920da8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 57.796923][ T7264] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044a809 [ 57.804869][ T7264] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000004 [ 57.812816][ T7264] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 57.820780][ T7264] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 57.828734][ T7264] R13: 0000000000000000 R14: 0000000000316777 R15: 0000000000000000 [ 57.836725][ T7264] [ 57.839031][ T7264] Allocated by task 7265: [ 57.843346][ T7264] __kasan_kmalloc+0x103/0x140 [ 57.848095][ T7264] __alloc_skb+0xde/0x4f0 [ 57.852406][ T7264] netlink_sendmsg+0x7b2/0xd70 [ 57.857178][ T7264] ____sys_sendmsg+0x519/0x800 [ 57.861934][ T7264] __sys_sendmsg+0x2b1/0x360 [ 57.866502][ T7264] do_syscall_64+0x73/0xe0 [ 57.870912][ T7264] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.876813][ T7264] [ 57.879115][ T7264] Freed by task 7265: [ 57.883072][ T7264] __kasan_slab_free+0x114/0x170 [ 57.887987][ T7264] kfree+0x10a/0x220 [ 57.891865][ T7264] __kfree_skb+0x56/0x1c0 [ 57.896167][ T7264] netlink_unicast+0x78e/0x940 [ 57.900909][ T7264] netlink_sendmsg+0xa57/0xd70 [ 57.905654][ T7264] ____sys_sendmsg+0x519/0x800 [ 57.910396][ T7264] __sys_sendmsg+0x2b1/0x360 [ 57.914958][ T7264] do_syscall_64+0x73/0xe0 [ 57.919357][ T7264] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.925227][ T7264] [ 57.927548][ T7264] The buggy address belongs to the object at ffff88809f3e9c00 [ 57.927548][ T7264] which belongs to the cache kmalloc-512 of size 512 [ 57.941581][ T7264] The buggy address is located 24 bytes inside of [ 57.941581][ T7264] 512-byte region [ffff88809f3e9c00, ffff88809f3e9e00) [ 57.954732][ T7264] The buggy address belongs to the page: [ 57.960341][ T7264] page:ffffea00027cfa40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 57.969423][ T7264] flags: 0xfffe0000000200(slab) [ 57.974253][ T7264] raw: 00fffe0000000200 ffffea000294b388 ffffea00029e4388 ffff8880aa400a80 [ 57.982853][ T7264] raw: 0000000000000000 ffff88809f3e9000 0000000100000004 0000000000000000 [ 57.991462][ T7264] page dumped because: kasan: bad access detected [ 57.997850][ T7264] [ 58.000199][ T7264] Memory state around the buggy address: [ 58.005831][ T7264] ffff88809f3e9b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 58.013876][ T7264] ffff88809f3e9b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 58.021911][ T7264] >ffff88809f3e9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.029946][ T7264] ^ [ 58.034770][ T7264] ffff88809f3e9c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.042812][ T7264] ffff88809f3e9d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.050879][ T7264] ================================================================== [ 58.058939][ T7264] Disabling lock debugging due to kernel taint [ 58.066079][ T7264] Kernel panic - not syncing: panic_on_warn set ... [ 58.072667][ T7264] CPU: 0 PID: 7264 Comm: syz-executor276 Tainted: G B 5.8.0-rc2-syzkaller #0 [ 58.082716][ T7264] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.092769][ T7264] Call Trace: [ 58.096054][ T7264] dump_stack+0x1f0/0x31e [ 58.100380][ T7264] panic+0x264/0x7a0 [ 58.104271][ T7264] ? trace_hardirqs_on+0x30/0x80 [ 58.109196][ T7264] kasan_report+0x1c9/0x1d0 [ 58.113692][ T7264] ? strnlen+0x63/0x80 [ 58.117743][ T7264] strnlen+0x63/0x80 [ 58.121615][ T7264] dev_get_by_name+0x9b/0x2a0 [ 58.126279][ T7264] wg_get_device_start+0x1fb/0x2d0 [ 58.131361][ T7264] genl_start+0x390/0x570 [ 58.135665][ T7264] __netlink_dump_start+0x3d2/0x700 [ 58.140835][ T7264] genl_rcv_msg+0xb03/0xe00 [ 58.145313][ T7264] ? genl_rcv_msg+0xe00/0xe00 [ 58.149977][ T7264] ? genl_start+0x570/0x570 [ 58.154450][ T7264] ? genl_lock_dumpit+0xa0/0xa0 [ 58.159274][ T7264] netlink_rcv_skb+0x190/0x3a0 [ 58.164013][ T7264] ? genl_unbind+0x270/0x270 [ 58.168598][ T7264] genl_rcv+0x24/0x40 [ 58.172562][ T7264] netlink_unicast+0x786/0x940 [ 58.177300][ T7264] netlink_sendmsg+0xa57/0xd70 [ 58.182048][ T7264] ? netlink_getsockopt+0x9e0/0x9e0 [ 58.187237][ T7264] ____sys_sendmsg+0x519/0x800 [ 58.191972][ T7264] ? import_iovec+0x12a/0x2c0 [ 58.196629][ T7264] __sys_sendmsg+0x2b1/0x360 [ 58.201226][ T7264] ? check_preemption_disabled+0x40/0x240 [ 58.206932][ T7264] ? check_preemption_disabled+0x40/0x240 [ 58.212632][ T7264] ? check_preemption_disabled+0x40/0x240 [ 58.218322][ T7264] ? do_syscall_64+0x1d/0xe0 [ 58.222900][ T7264] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.228937][ T7264] do_syscall_64+0x73/0xe0 [ 58.233324][ T7264] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.239187][ T7264] RIP: 0033:0x44a809 [ 58.243056][ T7264] Code: Bad RIP value. [ 58.247097][ T7264] RSP: 002b:00007fed6f920da8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 58.255489][ T7264] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044a809 [ 58.263439][ T7264] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000004 [ 58.271382][ T7264] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 58.279326][ T7264] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 58.287268][ T7264] R13: 0000000000000000 R14: 0000000000316777 R15: 0000000000000000 [ 58.296214][ T7264] Kernel Offset: disabled [ 58.300525][ T7264] Rebooting in 86400 seconds..