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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-18 19:21:32 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-18 19:21:32 +0200 |
| commit | 8f05bde9bd6da80365495369738ab869c1f8bcac (patch) | |
| tree | 926ed74048ae5554c8c959143307fa836a337db3 /kernel | |
| parent | Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmar... (diff) | |
| parent | kmemleak: No need for scanning specific module sections (diff) | |
| download | linux-8f05bde9bd6da80365495369738ab869c1f8bcac.tar.xz linux-8f05bde9bd6da80365495369738ab869c1f8bcac.zip | |
Merge tag 'kmemleak-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64
Pull kmemleak patches from Catalin Marinas:
"Kmemleak now scans all the writable and non-executable module sections
to avoid false positives (previously it was only scanning specific
sections and missing .ref.data)."
* tag 'kmemleak-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
kmemleak: No need for scanning specific module sections
kmemleak: Scan all allocated, writeable and not executable module sections
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/module.c | 21 |
1 files changed, 4 insertions, 17 deletions
diff --git a/kernel/module.c b/kernel/module.c index b049939177f6..cab4bce49c23 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -2431,10 +2431,10 @@ static void kmemleak_load_module(const struct module *mod, kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL); for (i = 1; i < info->hdr->e_shnum; i++) { - const char *name = info->secstrings + info->sechdrs[i].sh_name; - if (!(info->sechdrs[i].sh_flags & SHF_ALLOC)) - continue; - if (!strstarts(name, ".data") && !strstarts(name, ".bss")) + /* Scan all writable sections that's not executable */ + if (!(info->sechdrs[i].sh_flags & SHF_ALLOC) || + !(info->sechdrs[i].sh_flags & SHF_WRITE) || + (info->sechdrs[i].sh_flags & SHF_EXECINSTR)) continue; kmemleak_scan_area((void *)info->sechdrs[i].sh_addr, @@ -2769,24 +2769,11 @@ static void find_module_sections(struct module *mod, struct load_info *info) mod->trace_events = section_objs(info, "_ftrace_events", sizeof(*mod->trace_events), &mod->num_trace_events); - /* - * This section contains pointers to allocated objects in the trace - * code and not scanning it leads to false positives. - */ - kmemleak_scan_area(mod->trace_events, sizeof(*mod->trace_events) * - mod->num_trace_events, GFP_KERNEL); #endif #ifdef CONFIG_TRACING mod->trace_bprintk_fmt_start = section_objs(info, "__trace_printk_fmt", sizeof(*mod->trace_bprintk_fmt_start), &mod->num_trace_bprintk_fmt); - /* - * This section contains pointers to allocated objects in the trace - * code and not scanning it leads to false positives. - */ - kmemleak_scan_area(mod->trace_bprintk_fmt_start, - sizeof(*mod->trace_bprintk_fmt_start) * - mod->num_trace_bprintk_fmt, GFP_KERNEL); #endif #ifdef CONFIG_FTRACE_MCOUNT_RECORD /* sechdrs[0].sh_size is always zero */ |