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| author | Otavio Salvador <otavio@ossystems.com.br> | 2019-03-28 10:47:24 -0300 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-03-28 10:47:24 -0300 |
| commit | 0a8ab17689e628c84a666195bfc6ab85d11cf057 (patch) | |
| tree | 01630dc4a6935df99bf7d11d34ff8d384fed86e2 /fs/cifs/smb2file.c | |
| parent | 1e71d8c630cbc0d1f5d762fd019690b5cdb880ae (diff) | |
| parent | 32aca03c2ce868d3412da0bb6ce6798c7bea357e (diff) | |
Merge pull request #46 from toradex/4.9-2.3.x-imx
4.9 2.3.x imx
Diffstat (limited to 'fs/cifs/smb2file.c')
| -rw-r--r-- | fs/cifs/smb2file.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c index b2aff0c6f22c..dee5250701de 100644 --- a/fs/cifs/smb2file.c +++ b/fs/cifs/smb2file.c @@ -123,12 +123,14 @@ smb2_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, /* * Accessing maxBuf is racy with cifs_reconnect - need to store value - * and check it for zero before using. + * and check it before using. */ max_buf = tcon->ses->server->maxBuf; - if (!max_buf) + if (max_buf < sizeof(struct smb2_lock_element)) return -EINVAL; + BUILD_BUG_ON(sizeof(struct smb2_lock_element) > PAGE_SIZE); + max_buf = min_t(unsigned int, max_buf, PAGE_SIZE); max_num = max_buf / sizeof(struct smb2_lock_element); buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL); if (!buf) @@ -265,6 +267,8 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile) return -EINVAL; } + BUILD_BUG_ON(sizeof(struct smb2_lock_element) > PAGE_SIZE); + max_buf = min_t(unsigned int, max_buf, PAGE_SIZE); max_num = max_buf / sizeof(struct smb2_lock_element); buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL); if (!buf) { |