6.4-stable review patch. If anyone has any objections, please let me know.
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From: Winston Wen wentao@uniontech.com
[ Upstream commit a43f95fdd39490f7b156fd126f1e90ec2d5553f1 ]
We need to specify charset, like "iocharset=utf-8", in mount options for Chinese path if the nls_default don't support it, such as iso8859-1, the default value for CONFIG_NLS_DEFAULT.
But now in reconnection the nls_default is used, instead of the one we specified and used in mount, and this can lead to mount failure.
Signed-off-by: Winston Wen wentao@uniontech.com Reviewed-by: Paulo Alcantara pc@manguebit.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/smb/client/cifsglob.h | 1 + fs/smb/client/cifssmb.c | 3 +-- fs/smb/client/connect.c | 5 +++++ fs/smb/client/misc.c | 1 + fs/smb/client/smb2pdu.c | 3 +-- 5 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h index ca2da713c5fe9..87c6ce54c72d0 100644 --- a/fs/smb/client/cifsglob.h +++ b/fs/smb/client/cifsglob.h @@ -1062,6 +1062,7 @@ struct cifs_ses { unsigned long chans_need_reconnect; /* ========= end: protected by chan_lock ======== */ struct cifs_ses *dfs_root_ses; + struct nls_table *local_nls; };
static inline bool diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c index a0c4e9874b010..a49f95ea7cf6f 100644 --- a/fs/smb/client/cifssmb.c +++ b/fs/smb/client/cifssmb.c @@ -129,7 +129,7 @@ cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command) } spin_unlock(&server->srv_lock);
- nls_codepage = load_nls_default(); + nls_codepage = ses->local_nls;
/* * need to prevent multiple threads trying to simultaneously @@ -200,7 +200,6 @@ cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command) rc = -EAGAIN; }
- unload_nls(nls_codepage); return rc; }
diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c index 853209268f507..e965196e4f746 100644 --- a/fs/smb/client/connect.c +++ b/fs/smb/client/connect.c @@ -1837,6 +1837,10 @@ static int match_session(struct cifs_ses *ses, struct smb3_fs_context *ctx) CIFS_MAX_PASSWORD_LEN)) return 0; } + + if (strcmp(ctx->local_nls->charset, ses->local_nls->charset)) + return 0; + return 1; }
@@ -2280,6 +2284,7 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx)
ses->sectype = ctx->sectype; ses->sign = ctx->sign; + ses->local_nls = load_nls(ctx->local_nls->charset);
/* add server as first channel */ spin_lock(&ses->chan_lock); diff --git a/fs/smb/client/misc.c b/fs/smb/client/misc.c index 70dbfe6584f9e..d7e85d9a26553 100644 --- a/fs/smb/client/misc.c +++ b/fs/smb/client/misc.c @@ -95,6 +95,7 @@ sesInfoFree(struct cifs_ses *buf_to_free) return; }
+ unload_nls(buf_to_free->local_nls); atomic_dec(&sesInfoAllocCount); kfree(buf_to_free->serverOS); kfree(buf_to_free->serverDomain); diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c index e04766fe6f803..a457f07f820dc 100644 --- a/fs/smb/client/smb2pdu.c +++ b/fs/smb/client/smb2pdu.c @@ -242,7 +242,7 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon, } spin_unlock(&server->srv_lock);
- nls_codepage = load_nls_default(); + nls_codepage = ses->local_nls;
/* * need to prevent multiple threads trying to simultaneously @@ -324,7 +324,6 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon, rc = -EAGAIN; } failed: - unload_nls(nls_codepage); return rc; }