From: David P. Quigley <dpquigl@xxxxxxxxxxxxx> Revalidate the write permissions for fallocate(2), in case security policy has changed since the files were opened. Acked-by: James Morris <jmorris@xxxxxxxxx> Signed-off-by: David P. Quigley <dpquigl@xxxxxxxxxxxxx> --- fs/open.c | 3 +++ 1 files changed, 3 insertions(+) Index: linux-2.6.22/fs/open.c =================================================================== --- linux-2.6.22.orig/fs/open.c +++ linux-2.6.22/fs/open.c @@ -407,6 +407,9 @@ asmlinkage long sys_fallocate(int fd, in goto out; if (!(file->f_mode & FMODE_WRITE)) goto out_fput; + ret = security_file_permission(file, MAY_WRITE); + if (ret) + goto out_fput; inode = file->f_path.dentry->d_inode; - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
