mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2025-01-15 02:05:33 +00:00
3c5700aeab
Factor out the validation of section names. There are two behavioral changes: 1. Previously, we did not validate non-SHF_ALLOC sections. This may have once been safe, as find_sec skips non-SHF_ALLOC sections, but find_any_sec, which will be used to load BTF if that is enabled, ignores the SHF_ALLOC flag. Since there's no need to support invalid section names, validate all of them, not just SHF_ALLOC sections. 2. Section names were validated *after* accessing them for the purposes of detecting ".modinfo" and ".gnu.linkonce.this_module". They are now checked prior to the access, which could avoid bad accesses with malformed modules. Signed-off-by: Matthew Maurer <mmaurer@google.com> Reviewed-by: Sami Tolvanen <samitolvanen@google.com> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>