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Cygwin: get_posix_access: avoid negative subscript

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Don't refer to lacl[pos] unless we know that pos >= 0.
This commit is contained in:
Ken Brown 2019-08-26 13:38:31 -04:00
parent d90a69b953
commit 22fe938fb5
1 changed files with 4 additions and 4 deletions
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8
winsup/cygwin/sec_acl.cc
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@ -807,9 +807,9 @@ get_posix_access (PSECURITY_DESCRIPTOR psd,
lacl[pos].a_id = ACL_UNDEFINED_ID;
lacl[pos].a_perm = CYG_ACE_MASK_TO_POSIX (ace->Mask);
aclsid[pos] = well_known_null_sid;
has_class_perm = true;
class_perm = lacl[pos].a_perm;
}
has_class_perm = true;
class_perm = lacl[pos].a_perm;
}
if (ace->Header.AceFlags & SUB_CONTAINERS_AND_OBJECTS_INHERIT)
{
@ -820,9 +820,9 @@ get_posix_access (PSECURITY_DESCRIPTOR psd,
lacl[pos].a_id = ACL_UNDEFINED_ID;
lacl[pos].a_perm = CYG_ACE_MASK_TO_POSIX (ace->Mask);
aclsid[pos] = well_known_null_sid;
has_def_class_perm = true;
def_class_perm = lacl[pos].a_perm;
}
has_def_class_perm = true;
def_class_perm = lacl[pos].a_perm;
}
}
}