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| author | Aurelien Aptel <aaptel@suse.com> | 2018-06-04 22:29:35 +0200 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2018-06-07 08:31:31 -0500 |
| commit | 8ddecf5fd728d3c6373394fa647d28e7c27f93a7 (patch) | |
| tree | df3913e2cb697e31eebca8180ea37180fbc36b8b /fs/cifs/smb2misc.c | |
| parent | 83210ba6f816823f1762fbe63bd4985d6274d205 (diff) | |
| download | lwn-8ddecf5fd728d3c6373394fa647d28e7c27f93a7.tar.gz lwn-8ddecf5fd728d3c6373394fa647d28e7c27f93a7.zip | |
CIFS: Fix NULL ptr deref
cifs->master_tlink is NULL against Win Server 2016 (which is
strange.. not sure why) and is dereferenced in cifs_sb_master_tcon().
move master_tlink getter to cifsglob.h so it can be used from
smb2misc.c
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
Diffstat (limited to 'fs/cifs/smb2misc.c')
| -rw-r--r-- | fs/cifs/smb2misc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c index cb5728e3d87d..e2bec47c6845 100644 --- a/fs/cifs/smb2misc.c +++ b/fs/cifs/smb2misc.c @@ -453,8 +453,10 @@ cifs_convert_path_to_utf16(const char *from, struct cifs_sb_info *cifs_sb) start_of_path = from + 1; #ifdef CONFIG_CIFS_SMB311 /* SMB311 POSIX extensions paths do not include leading slash */ - else if (cifs_sb_master_tcon(cifs_sb)->posix_extensions) + else if (cifs_sb_master_tlink(cifs_sb) && + cifs_sb_master_tcon(cifs_sb)->posix_extensions) { start_of_path = from + 1; + } #endif /* 311 */ else start_of_path = from; |