Re: [PATCH] btrfs-progs: mkfs rootdir: use lgetxattr() not to follow a symbolic link

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On 2018年04月02日 09:59, Misono Tomohiro wrote:
> mkfs-test 016 "rootdir-bad-symbolic-link" fails when selinux is enabled.
> This is because add_xattr_item() uses getxattr() and tries to follow a
> bad symbolic link for selinux item, which causes ENOENT error.
> 
> The line above already uses llistxattr() for getting list of xattr in
> order not to follow a symbolic link, so just use lgetxattr() too.
> 
> Signed-off-by: Tomohiro Misono <misono.tomohiro@xxxxxxxxxxxxxx>

Reviewed-by: Qu Wenruo <wqu@xxxxxxxx>

Thanks,
Qu

> ---
>  mkfs/rootdir.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mkfs/rootdir.c b/mkfs/rootdir.c
> index 33c3ff1e..ff00bb0f 100644
> --- a/mkfs/rootdir.c
> +++ b/mkfs/rootdir.c
> @@ -249,7 +249,7 @@ static int add_xattr_item(struct btrfs_trans_handle *trans,
>  		cur_name_len = strlen(cur_name);
>  		next_location += cur_name_len + 1;
>  
> -		ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
> +		ret = lgetxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
>  		if (ret < 0) {
>  			if (errno == ENOTSUP)
>  				return 0;
> 

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