syzbot

__nla_validate_parse: 1 callbacks suppressed
netlink: 4 bytes leftover after parsing attributes in process `syz-executor372'.
------------[ cut here ]------------
proc_dir_entry 'can-bcm/25480' already registered
WARNING: CPU: 1 PID: 4250 at fs/proc/generic.c:377 proc_register+0x2e8/0x464 fs/proc/generic.c:378
Modules linked in:
CPU: 1 PID: 4250 Comm: syz-executor372 Not tainted 6.1.84-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : proc_register+0x2e8/0x464 fs/proc/generic.c:378
lr : proc_register+0x2e0/0x464 fs/proc/generic.c:376
sp : ffff80001dd17a40
x29: ffff80001dd17a60 x28: dfff800000000000 x27: 0000000000000000
x26: 0000000000000005 x25: ffff0000cc999bf8 x24: ffff0000cc9674a4
x23: ffff0000cc967498 x22: 1fffe0001992ce8a x21: ffff0000cc967454
x20: ffff0000cc999c24 x19: ffff0000cc9673c0 x18: ffff80001dd16e40
x17: 0000000000000000 x16: ffff8000121561d4 x15: 0000000000000000
x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000000001
x11: 0000000000ff0100 x10: 0000000000000000 x9 : 9f0fa8e602901a00
x8 : 9f0fa8e602901a00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001dd17338 x4 : ffff800015922b00 x3 : ffff8000085888dc
x2 : 0000000000000001 x1 : 0000000100000001 x0 : ffff800015b4e9a0
Call trace:
 proc_register+0x2e8/0x464 fs/proc/generic.c:378
 proc_create_net_single+0x140/0x198 fs/proc/proc_net.c:219
 bcm_connect+0x220/0x438 net/can/bcm.c:1631
 __sys_connect_file net/socket.c:2006 [inline]
 __sys_connect+0x268/0x290 net/socket.c:2023
 __do_sys_connect net/socket.c:2033 [inline]
 __se_sys_connect net/socket.c:2030 [inline]
 __arm64_sys_connect+0x7c/0x94 net/socket.c:2030
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 2358
hardirqs last  enabled at (2357): [<ffff800008343d04>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:261
hardirqs last disabled at (2358): [<ffff800012151e8c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (2334): [<ffff8000103d4804>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (2332): [<ffff8000103d47d0>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---