On Mon, Jul 1, 2024 at 2:27 PM James Carter <jwcart2@xxxxxxxxx> wrote:
>
> Trying to compile libselinux for 32-bit produces the following error:
>
> selinux_restorecon.c:1194:31: error: comparison of integer expressions of different signedness: ‘__fsword_t’ {aka ‘int’} and ‘unsigned int’ [-Werror=sign-compare]
> 1194 | if (state.sfsb.f_type == RAMFS_MAGIC || state.sfsb.f_type == TMPFS_MAGIC ||
> | ^~
>
> Since RAMFS_MAGIC = 0x858458f6 == 2240043254, which > 2^31, but < 2^32,
> cast both as uint32_t for the comparison.
>
> Reported-by: Daniel Schepler
> Signed-off-by: James Carter <jwcart2@xxxxxxxxx>
Acked-by: Stephen Smalley <stephen.smalley.work@xxxxxxxxx>
> ---
> libselinux/src/selinux_restorecon.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/libselinux/src/selinux_restorecon.c b/libselinux/src/selinux_restorecon.c
> index acb729c8..bc6ed935 100644
> --- a/libselinux/src/selinux_restorecon.c
> +++ b/libselinux/src/selinux_restorecon.c
> @@ -1191,8 +1191,8 @@ static int selinux_restorecon_common(const char *pathname_orig,
> }
>
> /* Skip digest on in-memory filesystems and /sys */
> - if (state.sfsb.f_type == RAMFS_MAGIC || state.sfsb.f_type == TMPFS_MAGIC ||
> - state.sfsb.f_type == SYSFS_MAGIC)
> + if ((uint32_t)state.sfsb.f_type == (uint32_t)RAMFS_MAGIC ||
> + state.sfsb.f_type == TMPFS_MAGIC || state.sfsb.f_type == SYSFS_MAGIC)
> state.setrestorecondigest = false;
>
> if (state.flags.set_xdev)
> @@ -1490,7 +1490,7 @@ int selinux_restorecon_xattr(const char *pathname, unsigned int xattr_flags,
>
> if (!recurse) {
> if (statfs(pathname, &sfsb) == 0) {
> - if (sfsb.f_type == RAMFS_MAGIC ||
> + if ((uint32_t)sfsb.f_type == (uint32_t)RAMFS_MAGIC ||
> sfsb.f_type == TMPFS_MAGIC)
> return 0;
> }
> @@ -1525,7 +1525,7 @@ int selinux_restorecon_xattr(const char *pathname, unsigned int xattr_flags,
> continue;
> case FTS_D:
> if (statfs(ftsent->fts_path, &sfsb) == 0) {
> - if (sfsb.f_type == RAMFS_MAGIC ||
> + if ((uint32_t)sfsb.f_type == (uint32_t)RAMFS_MAGIC ||
> sfsb.f_type == TMPFS_MAGIC)
> continue;
> }
> --
> 2.45.2
>
>
