[v5.15] WARNING in rdma_restrack_clean (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 1c700860e8bc Linux 5.15.185
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12f031d4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=db74c56dea20051
dashboard link: https://syzkaller.appspot.com/bug?extid=98dcc437ef897cdabe39
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/98c9bcd8fb21/disk-1c700860.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/75eaa3b1c3f3/vmlinux-1c700860.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ed251e9d15fe/bzImage-1c700860.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+98dcc4...@syzkaller.appspotmail.com

netlink: 64 bytes leftover after parsing attributes in process `syz.5.1969'.
siw: device registration error -23
smc: removing ib device syz2
rdma_rxe: rxe-pd pool destroyed with unfree'd elem
rdma_rxe: rxe-mr pool destroyed with unfree'd elem
------------[ cut here ]------------
WARNING: CPU: 1 PID: 11892 at drivers/infiniband/core/restrack.c:52 rdma_restrack_clean+0x2a6/0x300 drivers/infiniband/core/restrack.c:52
Modules linked in:
CPU: 1 PID: 11892 Comm: syz.5.1969 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:rdma_restrack_clean+0x2a6/0x300 drivers/infiniband/core/restrack.c:52
Code: 40 21 56 fa 49 81 c6 68 02 00 00 4c 89 f7 e8 51 54 df fc 48 89 df 5b 41 5c 41 5d 41 5e 41 5f 5d e9 6f 03 9b fa e8 1a 21 56 fa <0f> 0b e9 b9 fd ff ff e8 0e 21 56 fa 0f 0b e9 f9 fd ff ff e8 02 21
RSP: 0018:ffffc9000332f260 EFLAGS: 00010246
RAX: ffffffff8721a106 RBX: ffff888019397000 RCX: 0000000000080000
RDX: ffffc90015331000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 1ffff110054171d8 R08: dffffc0000000000 R09: ffffed10054171db
R10: ffffed10054171db R11: 1ffff110054171da R12: 1ffff110054171c9
R13: dffffc0000000000 R14: ffff88802a0b8ec0 R15: ffff888019397048
FS: 00007f4e9197c6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f399e3fcab8 CR3: 00000000752e9000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
ib_dealloc_device+0x160/0x1f0 drivers/infiniband/core/device.c:684
__ib_unregister_device+0x120/0x170 drivers/infiniband/core/device.c:1500
ib_unregister_device_and_put+0xb4/0xf0 drivers/infiniband/core/device.c:1547
nldev_dellink+0x2be/0x310 drivers/infiniband/core/nldev.c:1740
rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline]
rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
rdma_nl_rcv+0x69b/0x970 drivers/infiniband/core/netlink.c:259
netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
netlink_unicast+0x77c/0x920 net/netlink/af_netlink.c:1337
netlink_sendmsg+0x8ab/0xbc0 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436
___sys_sendmsg+0x1f0/0x260 net/socket.c:2490
__sys_sendmsg net/socket.c:2519 [inline]
__do_sys_sendmsg net/socket.c:2528 [inline]
__se_sys_sendmsg+0x190/0x250 net/socket.c:2526
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4e93b14929
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:00007f4e9197c038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f4e93d3bfa0 RCX: 00007f4e93b14929
RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000000000000009
RBP: 00007f4e93b96b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4e93d3bfa0 R15: 00007ffe38517be8
</TASK>


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