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| author | Namjae Jeon <linkinjeon@kernel.org> | 2026-09-09 09:58:22 +0900 |
|---|---|---|
| committer | Namjae Jeon <linkinjeon@kernel.org> | 2026-09-15 22:28:51 +0900 |
| commit | f4fafaf02174c32bce2f9bb4196fadf13f1fd96e (patch) | |
| tree | 830a824bf8e3c26a7d11a9e84fd4290fccc0b0de | |
| parent | d7fd1f98607f2cd358e583f9548bdf0173090a86 (diff) | |
| download | linux-next-f4fafaf02174c32bce2f9bb4196fadf13f1fd96e.tar.gz linux-next-f4fafaf02174c32bce2f9bb4196fadf13f1fd96e.zip | |
ksmbd: fix partial normalized name responses
Windows may request FILE_NORMALIZED_NAME_INFORMATION with an output
buffer that only fits the fixed portion of the variable-length response.
Treat the fixed portion as FILE_NORMALIZED_NAME_INFORMATION_SIZE so ksmbd
returns STATUS_BUFFER_OVERFLOW instead of STATUS_INFO_LENGTH_MISMATCH.
This avoids rejecting valid partial normalized-name responses.
Fixes: 6b8b79226bc3 ("ksmbd: fix partial file information responses")
Reported-by: Mobin Aydinfar <mobin@mobintestserver.ir>
Reviewed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
| -rw-r--r-- | fs/smb/server/smb2pdu.c | 3 | ||||
| -rw-r--r-- | fs/smb/server/smb2pdu.h | 1 |
2 files changed, 4 insertions, 0 deletions
diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c index 8acc5174530b..0436b7c898b1 100644 --- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -7312,6 +7312,9 @@ static int smb2_get_info_file(struct ksmbd_work *work, case FILE_ALTERNATE_NAME_INFORMATION: fixed_len = FILE_ALTERNATE_NAME_INFORMATION_SIZE; break; + case FILE_NORMALIZED_NAME_INFORMATION: + fixed_len = FILE_NORMALIZED_NAME_INFORMATION_SIZE; + break; case FILE_STREAM_INFORMATION: fixed_len = FILE_STREAM_INFORMATION_SIZE; break; diff --git a/fs/smb/server/smb2pdu.h b/fs/smb/server/smb2pdu.h index a6200d8630e2..ca8e27f7b712 100644 --- a/fs/smb/server/smb2pdu.h +++ b/fs/smb/server/smb2pdu.h @@ -212,6 +212,7 @@ struct file_sparse { #define FILE_ALLOCATION_INFORMATION_SIZE 19 #define FILE_END_OF_FILE_INFORMATION_SIZE 20 #define FILE_ALTERNATE_NAME_INFORMATION_SIZE 8 +#define FILE_NORMALIZED_NAME_INFORMATION_SIZE 8 #define FILE_STREAM_INFORMATION_SIZE 32 #define FILE_PIPE_INFORMATION_SIZE 23 #define FILE_PIPE_LOCAL_INFORMATION_SIZE 24 |