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lsm: cleanup the size counters in security_getselfattr()

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Zero out all of the size counters in the -E2BIG case (buffer too
small) to help make the current code a bit more robust in the face of
future code changes.

Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Reviewed-by: Mickaël Salaün <mic@digikod.net>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Paul Moore 2023-10-24 12:38:40 -04:00
parent aab30be071
commit dc46db78b9
1 changed files with 2 additions and 1 deletions
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3
security/security.c
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@ -3950,8 +3950,9 @@ int security_getselfattr(unsigned int attr, struct lsm_ctx __user *uctx,
continue;
}
if (rc == -E2BIG) {
toobig = true;
rc = 0;
left = 0;
toobig = true;
} else if (rc < 0)
return rc;
else