syzbot

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proc_dir_entry 'can-bcm/4732' already registered
WARNING: CPU: 1 PID: 5078 at fs/proc/generic.c:375 proc_register+0x451/0x5f0 fs/proc/generic.c:375
Modules linked in:
CPU: 1 PID: 5078 Comm: syz-executor114 Not tainted 6.7.0-syzkaller-09928-g052d534373b7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:proc_register+0x451/0x5f0 fs/proc/generic.c:375
Code: 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 a2 01 00 00 48 8b 44 24 10 48 c7 c7 60 07 e0 8a 48 8b b0 d8 00 00 00 e8 10 ff 37 ff 90 <0f> 0b 90 90 48 c7 c7 00 82 3d 8d e8 5f a8 78 08 48 8b 4c 24 28 48
RSP: 0018:ffffc90003a9fc58 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff814e08e9
RDX: ffff88802ab7d940 RSI: ffffffff814e08f6 RDI: 0000000000000001
RBP: ffff888022c8fb38 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888026c01a80
R13: dffffc0000000000 R14: ffff888026c019f0 R15: ffffed1004d8036c
FS:  0000555556910380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f13b0e66900 CR3: 0000000028e91000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 proc_create_net_single+0x105/0x170 fs/proc/proc_net.c:219
 bcm_connect+0x1ed/0x4c0 net/can/bcm.c:1631
 __sys_connect_file+0x15b/0x1a0 net/socket.c:2048
 __sys_connect+0x145/0x170 net/socket.c:2065
 __do_sys_connect net/socket.c:2075 [inline]
 __se_sys_connect net/socket.c:2072 [inline]
 __x64_sys_connect+0x72/0xb0 net/socket.c:2072
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f13b0e7fde9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdfd95a4d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f13b0e7fde9
RDX: 0000000000000010 RSI: 00000000200001c0 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000100000000
R10: 0000000100000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffdfd95a4fc R15: 0000000000000003
 </TASK>