Re: [syzbot] [bpf?] [net?] WARNING in sock_map_close (2)

[syzbot <syzbot+8dbe3133b840c470da0e@syzkaller.appspotmail.com>]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in sock_map_link

------------[ cut here ]------------
WARNING: CPU: 0 PID: 6104 at net/core/sock_map.c:206 sock_map_init_proto net/core/sock_map.c:206 [inline]
WARNING: CPU: 0 PID: 6104 at net/core/sock_map.c:206 sock_map_link+0xd6e/0xe40 net/core/sock_map.c:311
Modules linked in:
CPU: 0 UID: 0 PID: 6104 Comm: syz.0.15 Not tainted 6.11.0-rc3-syzkaller-00508-gd785ed945de6-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:sock_map_init_proto net/core/sock_map.c:206 [inline]
RIP: 0010:sock_map_link+0xd6e/0xe40 net/core/sock_map.c:311
Code: ff ff e9 65 f9 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 34 f3 ff ff 48 89 df e8 4d 90 5a f8 e9 27 f3 ff ff e8 23 4b f3 f7 90 <0f> 0b 90 e9 d9 fd ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a0 f6
RSP: 0018:ffffc90002d57a60 EFLAGS: 00010293
RAX: ffffffff89a03e4d RBX: ffffffff95312d30 RCX: ffff88802034da00
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88807dbfda08
RBP: ffffc90002d57b60 R08: ffff88807dbfda0f R09: 1ffff1100fb7fb41
R10: dffffc0000000000 R11: ffffed100fb7fb42 R12: ffff88802b274000
R13: 1ffff920005aaf58 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f4ea726e6c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000440 CR3: 00000000791a4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sock_hash_update_common+0xd1/0xa30 net/core/sock_map.c:1014
 sock_map_update_elem_sys+0x5a4/0x910 net/core/sock_map.c:598
 map_update_elem+0x53a/0x6f0 kernel/bpf/syscall.c:1654
 __sys_bpf+0x76f/0x810 kernel/bpf/syscall.c:5698
 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5815 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5815
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4ea6579e79
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4ea726e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f4ea6715f80 RCX: 00007f4ea6579e79
RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002
RBP: 00007f4ea65e7916 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4ea6715f80 R15: 00007ffcfb2f8928
 </TASK>


Tested on:

commit:         d785ed94 net: wwan: t7xx: PCIe reset rescan
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git
console output: https://syzkaller.appspot.com/x/log.txt?x=148d382b980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7229118d88b4a71b
dashboard link: https://syzkaller.appspot.com/bug?extid=8dbe3133b840c470da0e
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=11f06d5b980000