[syzbot] BUG: RESTRACK detected leak of resources

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    c7b4d0e56a1d Add linux-next specific files for 20210930
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=104be6cb300000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c9a1f6685aeb48bd
dashboard link: https://syzkaller.appspot.com/bug?extid=3a992c9e4fd9f0e6fd0e
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

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

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3a992c9e4fd9f0e6fd0e@xxxxxxxxxxxxxxxxxxxxxxxxx

rdma_rxe: rxe-pd pool destroyed with unfree'd elem
rdma_rxe: rxe-mr pool destroyed with unfree'd elem
restrack: ------------[ cut here ]------------
infiniband syz0: BUG: RESTRACK detected leak of resources
restrack: Kernel PD object allocated by rds_rdma is not freed
restrack: ------------[ cut here ]------------


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