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kmemleak: Scan all allocated, writeable and not executable module sections 

Instead of just picking data sections by name (names that start
with .data, .bss or .ref.data), use the section flags and scan all
sections that are allocated, writable and not executable. Which should
cover all sections of a module that might reference data.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
[catalin.marinas@arm.com: removed unused 'name' variable]
[catalin.marinas@arm.com: collapsed 'if' blocks]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Steven Rostedt 2013-05-15 20:33:01 +01:00 committed by Catalin Marinas
parent f722406faa
commit 06c9494c0e
1 changed files with 4 additions and 4 deletions
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8
kernel/module.c
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@ -2431,10 +2431,10 @@ static void kmemleak_load_module(const struct module *mod,
kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL); kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL);
for (i = 1; i < info->hdr->e_shnum; i++) { for (i = 1; i < info->hdr->e_shnum; i++) {
const char *name = info->secstrings + info->sechdrs[i].sh_name; /* Scan all writable sections that's not executable */
if (!(info->sechdrs[i].sh_flags & SHF_ALLOC)) if (!(info->sechdrs[i].sh_flags & SHF_ALLOC) ||
continue; !(info->sechdrs[i].sh_flags & SHF_WRITE) ||
if (!strstarts(name, ".data") && !strstarts(name, ".bss")) (info->sechdrs[i].sh_flags & SHF_EXECINSTR))
continue; continue;
kmemleak_scan_area((void *)info->sechdrs[i].sh_addr, kmemleak_scan_area((void *)info->sechdrs[i].sh_addr,