netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. ------------[ cut here ]------------ proc_dir_entry 'can-bcm/4743' already registered WARNING: CPU: 0 PID: 3627 at fs/proc/generic.c:375 proc_register+0x130/0x1c0 fs/proc/generic.c:375 Modules linked in: CPU: 0 PID: 3627 Comm: syz-executor.0 Not tainted 6.9.0-rc3-syzkaller-00344-g8f2c057754b2 #0 Hardware name: linux,dummy-virt (DT) pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) pc : proc_register+0x130/0x1c0 fs/proc/generic.c:375 lr : proc_register+0x130/0x1c0 fs/proc/generic.c:375 sp : ffff800089a6bc40 x29: ffff800089a6bc40 x28: f0f000000bdcb600 x27: ffff80008269db20 x26: f2f00000078a0200 x25: ffff80008285f728 x24: f2f00000078a0180 x23: 0000000000000004 x22: f2f000000bfb876c x21: 0000000000000004 x20: f2f000000bfb86c0 x19: f4f00000042f3148 x18: ffffffffffffffff x17: 0000000000000000 x16: 0000000000000000 x15: ffff800089a6b670 x14: 0000000000000000 x13: ffff8000825ab880 x12: 0000000000000939 x11: 0000000000000313 x10: ffff80008265b880 x9 : ffff8000825ab880 x8 : 00000000ffffdfff x7 : ffff80008265b880 x6 : 80000000ffffe000 x5 : fff000007f8ccd08 x4 : 0000000000000000 x3 : fff07ffffd37a000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : f0f000000bdcb600 Call trace: proc_register+0x130/0x1c0 fs/proc/generic.c:375 proc_create_net_single+0x50/0x68 fs/proc/proc_net.c:219 bcm_connect+0x8c/0x1c0 net/can/bcm.c:1673 __sys_connect_file+0x80/0xb4 net/socket.c:2048 __sys_connect+0xb0/0xd0 net/socket.c:2065 __do_sys_connect net/socket.c:2075 [inline] __se_sys_connect net/socket.c:2072 [inline] __arm64_sys_connect+0x20/0x30 net/socket.c:2072 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x48/0x118 arch/arm64/kernel/syscall.c:48 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:133 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:152 el0_svc+0x34/0xf8 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598 ---[ end trace 0000000000000000 ]---