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| author | Namjae Jeon <linkinjeon@kernel.org> | 2022-07-22 04:15:57 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-17 12:50:28 +0300 |
| commit | 876a7e3b58e34e3c7afe28b67ecf13833fe10544 (patch) | |
| tree | 47e7cf3797c3aadf73883050b1d6971a372de57d | |
| parent | 05cbc9806ae8a4cf53e454e5cb2e5292726a5620 (diff) | |
| download | linux-876a7e3b58e34e3c7afe28b67ecf13833fe10544.tar.xz | |
ksmbd: add channel rwlock
[ Upstream commit 8e06b31e348107c5d78e2c90bb7e69388cb97fb6 ]
Add missing rwlock for channel list in session.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Stable-dep-of: 7b4323373d84 ("ksmbd: fix deadlock in ksmbd_find_crypto_ctx()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | fs/ksmbd/mgmt/user_session.c | 3 | ||||
| -rw-r--r-- | fs/ksmbd/mgmt/user_session.h | 1 | ||||
| -rw-r--r-- | fs/ksmbd/smb2pdu.c | 20 |
3 files changed, 22 insertions, 2 deletions
diff --git a/fs/ksmbd/mgmt/user_session.c b/fs/ksmbd/mgmt/user_session.c index 8fe08df66858..0c7b5335c12a 100644 --- a/fs/ksmbd/mgmt/user_session.c +++ b/fs/ksmbd/mgmt/user_session.c @@ -32,11 +32,13 @@ static void free_channel_list(struct ksmbd_session *sess) { struct channel *chann, *tmp; + write_lock(&sess->chann_lock); list_for_each_entry_safe(chann, tmp, &sess->ksmbd_chann_list, chann_list) { list_del(&chann->chann_list); kfree(chann); } + write_unlock(&sess->chann_lock); } static void __session_rpc_close(struct ksmbd_session *sess, @@ -305,6 +307,7 @@ static struct ksmbd_session *__session_create(int protocol) INIT_LIST_HEAD(&sess->rpc_handle_list); sess->sequence_number = 1; atomic_set(&sess->refcnt, 1); + rwlock_init(&sess->chann_lock); switch (protocol) { case CIFDS_SESSION_FLAG_SMB2: diff --git a/fs/ksmbd/mgmt/user_session.h b/fs/ksmbd/mgmt/user_session.h index 8b08189be3fc..1ec659f0151b 100644 --- a/fs/ksmbd/mgmt/user_session.h +++ b/fs/ksmbd/mgmt/user_session.h @@ -48,6 +48,7 @@ struct ksmbd_session { char sess_key[CIFS_KEY_SIZE]; struct hlist_node hlist; + rwlock_t chann_lock; struct list_head ksmbd_chann_list; struct xarray tree_conns; struct ida tree_conn_ida; diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index d41995f89bef..e17f7a5dd997 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -1525,7 +1525,9 @@ static int ntlm_authenticate(struct ksmbd_work *work) binding_session: if (conn->dialect >= SMB30_PROT_ID) { + read_lock(&sess->chann_lock); chann = lookup_chann_list(sess, conn); + read_unlock(&sess->chann_lock); if (!chann) { chann = kmalloc(sizeof(struct channel), GFP_KERNEL); if (!chann) @@ -1533,7 +1535,9 @@ binding_session: chann->conn = conn; INIT_LIST_HEAD(&chann->chann_list); + write_lock(&sess->chann_lock); list_add(&chann->chann_list, &sess->ksmbd_chann_list); + write_unlock(&sess->chann_lock); } } @@ -1608,7 +1612,9 @@ static int krb5_authenticate(struct ksmbd_work *work) } if (conn->dialect >= SMB30_PROT_ID) { + read_lock(&sess->chann_lock); chann = lookup_chann_list(sess, conn); + read_unlock(&sess->chann_lock); if (!chann) { chann = kmalloc(sizeof(struct channel), GFP_KERNEL); if (!chann) @@ -1616,7 +1622,9 @@ static int krb5_authenticate(struct ksmbd_work *work) chann->conn = conn; INIT_LIST_HEAD(&chann->chann_list); + write_lock(&sess->chann_lock); list_add(&chann->chann_list, &sess->ksmbd_chann_list); + write_unlock(&sess->chann_lock); } } @@ -8388,10 +8396,14 @@ int smb3_check_sign_req(struct ksmbd_work *work) if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { signing_key = work->sess->smb3signingkey; } else { + read_lock(&work->sess->chann_lock); chann = lookup_chann_list(work->sess, conn); - if (!chann) + if (!chann) { + read_unlock(&work->sess->chann_lock); return 0; + } signing_key = chann->smb3signingkey; + read_unlock(&work->sess->chann_lock); } if (!signing_key) { @@ -8451,10 +8463,14 @@ void smb3_set_sign_rsp(struct ksmbd_work *work) le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { signing_key = work->sess->smb3signingkey; } else { + read_lock(&work->sess->chann_lock); chann = lookup_chann_list(work->sess, work->conn); - if (!chann) + if (!chann) { + read_unlock(&work->sess->chann_lock); return; + } signing_key = chann->smb3signingkey; + read_unlock(&work->sess->chann_lock); } if (!signing_key) |