rds: rds_rm_zerocopy_callback() use list_first_entry()

stable inclusion
from stable-v5.10.168
commit c53f34ec3fbf3e9f67574118a6bb35ae1146f7ca
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6I7UF
CVE: CVE-2023-1078

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=c53f34ec3fbf3e9f67574118a6bb35ae1146f7ca



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[ Upstream commit f753a689 ]

rds_rm_zerocopy_callback() uses list_entry() on the head of a list
causing a type confusion.
Use list_first_entry() to actually access the first element of the
rs_zcookie_queue list.

Fixes: 9426bbc6 ("rds: use list structure to track information for zerocopy completion notification")
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Pietro Borrello <borrello@diag.uniroma1.it>
Link: https://lore.kernel.org/r/20230202-rds-zerocopy-v3-1-83b0df974f9a@diag.uniroma1.it


Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Lu Wei <luwei32@huawei.com>
Reviewed-by: Liu Jian <liujian56@huawei.com>
Reviewed-by: Wang Weiyang <wangweiyang2@huawei.com>
Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>