From: Tom Rix trix@redhat.com
stable inclusion from stable-5.10.80 commit 851b622e7b4f28c0fdbc543fadf4256e29927b04 bugzilla: 185821 https://gitee.com/openeuler/kernel/issues/I4L7CG
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit d108370c644b153382632b3e5511ade575c91c86 ]
clang static analysis reports this representative problem:
label.c:1463:16: warning: Assigned value is garbage or undefined label->hname = name; ^ ~~~~
In aa_update_label_name(), this the problem block of code
if (aa_label_acntsxprint(&name, ...) == -1) return res;
On failure, aa_label_acntsxprint() has a more complicated return that just -1. So check for a negative return.
It was also noted that the aa_label_acntsxprint() main comment refers to a nonexistent parameter, so clean up the comment.
Fixes: f1bd904175e8 ("apparmor: add the base fns() for domain labels") Signed-off-by: Tom Rix trix@redhat.com Reviewed-by: Nick Desaulniers ndesaulniers@google.com Signed-off-by: John Johansen john.johansen@canonical.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Reviewed-by: Weilong Chen chenweilong@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- security/apparmor/label.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/security/apparmor/label.c b/security/apparmor/label.c index e68bcedca976..6222fdfebe4e 100644 --- a/security/apparmor/label.c +++ b/security/apparmor/label.c @@ -1454,7 +1454,7 @@ bool aa_update_label_name(struct aa_ns *ns, struct aa_label *label, gfp_t gfp) if (label->hname || labels_ns(label) != ns) return res;
- if (aa_label_acntsxprint(&name, ns, label, FLAGS_NONE, gfp) == -1) + if (aa_label_acntsxprint(&name, ns, label, FLAGS_NONE, gfp) < 0) return res;
ls = labels_set(label); @@ -1704,7 +1704,7 @@ int aa_label_asxprint(char **strp, struct aa_ns *ns, struct aa_label *label,
/** * aa_label_acntsxprint - allocate a __counted string buffer and print label - * @strp: buffer to write to. (MAY BE NULL if @size == 0) + * @strp: buffer to write to. * @ns: namespace profile is being viewed from * @label: label to view (NOT NULL) * @flags: flags controlling what label info is printed