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SubjectRe: [PATCH] apparmor: remove redundant pointer 'info'
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On 07/14/2018 09:19 AM, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> Pointer 'info' is being assigned but is never used hence it is
> redundant and can be removed.
>
> Cleans up clang warning:
> warning: variable 'info' set but not used [-Wunused-but-set-variable]
>
NAK,

real problem wrong fix, instead of deleting the additional context info
we need to be auditing it

diff --git a/security/apparmor/domain.c b/security/apparmor/domain.c
index 098d546d8253..08c88de0ffda 100644
--- a/security/apparmor/domain.c
+++ b/security/apparmor/domain.c
@@ -1036,7 +1036,7 @@ static struct aa_label *build_change_hat(struct aa_profile *profile,
audit:
aa_audit_file(profile, &nullperms, OP_CHANGE_HAT, AA_MAY_CHANGEHAT,
name, hat ? hat->base.hname : NULL,
- hat ? &hat->label : NULL, GLOBAL_ROOT_UID, NULL,
+ hat ? &hat->label : NULL, GLOBAL_ROOT_UID, info,
error);
if (!hat || (error && error != -ENOENT))
return ERR_PTR(error);
I pushed this fix into apparmor-next



> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> security/apparmor/domain.c | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/security/apparmor/domain.c b/security/apparmor/domain.c
> index 098d546d8253..410d9ce09861 100644
> --- a/security/apparmor/domain.c
> +++ b/security/apparmor/domain.c
> @@ -1006,7 +1006,6 @@ static struct aa_label *build_change_hat(struct aa_profile *profile,
> const char *name, bool sibling)
> {
> struct aa_profile *root, *hat = NULL;
> - const char *info = NULL;
> int error = 0;
>
> if (sibling && PROFILE_IS_HAT(profile)) {
> @@ -1014,7 +1013,6 @@ static struct aa_label *build_change_hat(struct aa_profile *profile,
> } else if (!sibling && !PROFILE_IS_HAT(profile)) {
> root = aa_get_profile(profile);
> } else {
> - info = "conflicting target types";
> error = -EPERM;
> goto audit;
> }
> @@ -1025,10 +1023,8 @@ static struct aa_label *build_change_hat(struct aa_profile *profile,
> if (COMPLAIN_MODE(profile)) {
> hat = aa_new_null_profile(profile, true, name,
> GFP_KERNEL);
> - if (!hat) {
> - info = "failed null profile create";
> + if (!hat)
> error = -ENOMEM;
> - }
> }
> }
> aa_put_profile(root);
>

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