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ksmbd: fix the warning from __kernel_write_iter

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[ 2110.972290] ------------[ cut here ]------------
[ 2110.972301] WARNING: CPU: 3 PID: 735 at fs/read_write.c:599 __kernel_write_iter+0x21b/0x280

This patch doesn't allow writing to directory.

Cc: stable@vger.kernel.org
Reported-by: Norbert Szetei <norbert@doyensec.com>
Tested-by: Norbert Szetei <norbert@doyensec.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Namjae Jeon 2025-04-15 09:31:08 +09:00 committed by Steve French
parent 18b4fac5ef
commit b37f2f332b
1 changed files with 2 additions and 1 deletions
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3
fs/smb/server/vfs.c
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@ -479,7 +479,8 @@ int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,
int err = 0;
if (work->conn->connection_type) {
if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) {
if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE)) ||
S_ISDIR(file_inode(fp->filp)->i_mode)) {
pr_err("no right to write(%pD)\n", fp->filp);
err = -EACCES;
goto out;