| Message ID | 20241223093840.29417-4-petr.pavlu@suse.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | module: Make .static_call_sites read-only after init | expand |
diff --git a/kernel/module/strict_rwx.c b/kernel/module/strict_rwx.c index 598f89195336..4ae5facab569 100644 --- a/kernel/module/strict_rwx.c +++ b/kernel/module/strict_rwx.c @@ -115,6 +115,15 @@ static const char *const ro_after_init[] = { * section, which are marked as such at module load time. */ "__jump_table", + +#ifdef CONFIG_HAVE_STATIC_CALL_INLINE + /* + * Section .static_call_sites holds data structures that need to be + * sorted and processed at module load time but are never modified + * afterwards. + */ + ".static_call_sites", +#endif }; void module_mark_ro_after_init(const Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
Section .static_call_sites holds data structures that need to be sorted and processed only at module load time. This initial processing happens in static_call_add_module(), which is invoked as a callback to the MODULE_STATE_COMING notification from prepare_coming_module(). The section is never modified afterwards. Make it therefore read-only after module initialization to avoid any (non-)accidental modifications. Signed-off-by: Petr Pavlu <petr.pavlu@suse.com> --- kernel/module/strict_rwx.c | 9 +++++++++ 1 file changed, 9 insertions(+)