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apparmor: Move path lookup to using preallocated buffers

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Dynamically allocating buffers is problematic and is an extra layer
that is a potntial point of failure and can slow down mediation.
Change path lookup to use the preallocated per cpu buffers.

Signed-off-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
John Johansen
2017-05-23 03:25:14 -07:00
parent 72c8a76864
commit 4227c333f6
4 changed files with 53 additions and 86 deletions
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4
security/apparmor/include/path.h
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@@ -23,10 +23,10 @@ enum path_flags {
PATH_CHROOT_NSCONNECT = 0x10, /* connect paths that are at ns root */
PATH_DELEGATE_DELETED = 0x08000, /* delegate deleted files */
PATH_MEDIATE_DELETED = 0x10000, /* mediate deleted paths */
PATH_MEDIATE_DELETED = 0x10000, /* mediate deleted paths */
};
int aa_path_name(const struct path *path, int flags, char **buffer,
int aa_path_name(const struct path *path, int flags, char *buffer,
const char **name, const char **info,
const char *disconnected);