From: Shyam Prasad N sprasad@microsoft.com
stable inclusion from stable-v6.6.4 commit 4875ef3e606bf66d1eba1509f7df08b87dda6843 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8N1WC
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 29954d5b1e0d67a4cd61c30c2201030c97e94b1e ]
My last change in this area introduced a change which accounted for primary channel in the interface ref count. However, it did not reduce this ref count on deallocation of the primary channel. i.e. during umount.
Fixing this leak here, by dropping this ref count for primary channel while freeing up the session.
Fixes: fa1d0508bdd4 ("cifs: account for primary channel in the interface list") Cc: stable@vger.kernel.org Reported-by: Paulo Alcantara pc@manguebit.com Signed-off-by: Shyam Prasad N sprasad@microsoft.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- fs/smb/client/connect.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c index a9632c060bce..d517651d7bce 100644 --- a/fs/smb/client/connect.c +++ b/fs/smb/client/connect.c @@ -2034,6 +2034,12 @@ void __cifs_put_smb_ses(struct cifs_ses *ses) } }
+ /* we now account for primary channel in iface->refcount */ + if (ses->chans[0].iface) { + kref_put(&ses->chans[0].iface->refcount, release_iface); + ses->chans[0].server = NULL; + } + sesInfoFree(ses); cifs_put_tcp_session(server, 0); }