[v6.6] WARNING in rxe_pool_cleanup

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 6282921b6825 Linux 6.6.94
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=160b5d0c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=96da6b2210cda427
dashboard link: https://syzkaller.appspot.com/bug?extid=a5dcac24232c46bb6698
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/a3bf0d8e22b2/disk-6282921b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d1d442f782d0/vmlinux-6282921b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a8378f4b7e1b/bzImage-6282921b.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a5dcac...@syzkaller.appspotmail.com

smc: removing ib device syz0
------------[ cut here ]------------
WARNING: CPU: 1 PID: 25369 at drivers/infiniband/sw/rxe/rxe_pool.c:116 rxe_pool_cleanup+0x42/0x50 drivers/infiniband/sw/rxe/rxe_pool.c:116
Modules linked in:
CPU: 1 PID: 25369 Comm: syz.8.5705 Not tainted 6.6.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:rxe_pool_cleanup+0x42/0x50 drivers/infiniband/sw/rxe/rxe_pool.c:116
Code: 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 90 f5 1b fa 48 83 3b 00 75 07 e8 65 4e c3 f9 5b c3 e8 5e 4e c3 f9 <0f> 0b 5b c3 66 2e 0f 1f 84 00 00 00 00 00 66 0f 1f 00 55 41 57 41
RSP: 0018:ffffc90003777168 EFLAGS: 00010246
RAX: ffffffff87c24772 RBX: ffff88807d2ed298 RCX: 0000000000080000
RDX: ffffc9001283e000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 0000000000000002 R08: ffff88807d2ec743 R09: 1ffff1100fa5d8e8
R10: dffffc0000000000 R11: ffffed100fa5d8e9 R12: dffffc0000000000
R13: 1ffff920006eee48 R14: ffffffff87c08e10 R15: dffffc0000000000
FS: 00007f97560536c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd10c181178 CR3: 000000006ca15000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
rxe_dealloc+0x33/0x100 drivers/infiniband/sw/rxe/rxe.c:24
ib_dealloc_device+0x4e/0x1f0 drivers/infiniband/core/device.c:666
__ib_unregister_device+0x120/0x170 drivers/infiniband/core/device.c:1501
ib_unregister_device_and_put+0xb8/0xf0 drivers/infiniband/core/device.c:1548
nldev_dellink+0x2af/0x300 drivers/infiniband/core/nldev.c:1761
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+0x6b9/0x9a0 drivers/infiniband/core/netlink.c:259
netlink_unicast_kernel net/netlink/af_netlink.c:1323 [inline]
netlink_unicast+0x750/0x8c0 net/netlink/af_netlink.c:1349
netlink_sendmsg+0x8c1/0xbe0 net/netlink/af_netlink.c:1891
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0x5bf/0x950 net/socket.c:2595
___sys_sendmsg+0x220/0x290 net/socket.c:2649
__sys_sendmsg net/socket.c:2678 [inline]
__do_sys_sendmsg net/socket.c:2687 [inline]
__se_sys_sendmsg+0x1a5/0x270 net/socket.c:2685
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f975518e929
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:00007f9756053038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f97553b6240 RCX: 00007f975518e929
RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 000000000000000a
RBP: 00007f9755210b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f97553b6240 R15: 00007ffed85a6de8
</TASK>


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