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authorLinus Torvalds <torvalds@linux-foundation.org>2019-10-11 10:19:24 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-10-11 10:19:24 -0700
commitc6f6ebd77ce1bb8931f78412a841dd1371820181 (patch)
tree3945e2d04047f9a263807f831bbbfd610a046a95 /scripts/mod
parent56c642e2aa1c3be3e51e136eace6502aca8116ab (diff)
parentfcfacb9f83745d9fa97937b8bc94a73bb0607912 (diff)
Merge tag 'modules-for-v5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
Pull module fixes from Jessica Yu: "Code cleanups and kbuild/namespace related fixups from Masahiro. Most importantly, it fixes a namespace-related modpost issue for external module builds - Fix broken external module builds due to a modpost bug in read_dump(), where the namespace was not being strdup'd and sym->namespace would be set to bogus data. - Various namespace-related kbuild fixes and cleanups thanks to Masahiro Yamada" * tag 'modules-for-v5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux: doc: move namespaces.rst from kbuild/ to core-api/ nsdeps: make generated patches independent of locale nsdeps: fix hashbang of scripts/nsdeps kbuild: fix build error of 'make nsdeps' in clean tree module: rename __kstrtab_ns_* to __kstrtabns_* to avoid symbol conflict modpost: fix broken sym->namespace for external module builds module: swap the order of symbol.namespace scripts: add_namespace: Fix coccicheck failed
Diffstat (limited to 'scripts/mod')
-rw-r--r--scripts/mod/modpost.c29
1 files changed, 15 insertions, 14 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 442d5e2ad688..936d3ad23c83 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -166,7 +166,7 @@ struct symbol {
struct module *module;
unsigned int crc;
int crc_valid;
- const char *namespace;
+ char *namespace;
unsigned int weak:1;
unsigned int vmlinux:1; /* 1 if symbol is defined in vmlinux */
unsigned int kernel:1; /* 1 if symbol is from kernel
@@ -348,20 +348,18 @@ static enum export export_from_sec(struct elf_info *elf, unsigned int sec)
return export_unknown;
}
-static const char *sym_extract_namespace(const char **symname)
+static char *sym_extract_namespace(const char **symname)
{
- size_t n;
- char *dupsymname;
+ char *namespace = NULL;
+ char *ns_separator;
- n = strcspn(*symname, ".");
- if (n < strlen(*symname) - 1) {
- dupsymname = NOFAIL(strdup(*symname));
- dupsymname[n] = '\0';
- *symname = dupsymname;
- return dupsymname + n + 1;
+ ns_separator = strchr(*symname, '.');
+ if (ns_separator) {
+ namespace = NOFAIL(strndup(*symname, ns_separator - *symname));
+ *symname = ns_separator + 1;
}
- return NULL;
+ return namespace;
}
/**
@@ -375,7 +373,6 @@ static struct symbol *sym_add_exported(const char *name, const char *namespace,
if (!s) {
s = new_symbol(name, mod, export);
- s->namespace = namespace;
} else {
if (!s->preloaded) {
warn("%s: '%s' exported twice. Previous export was in %s%s\n",
@@ -386,6 +383,8 @@ static struct symbol *sym_add_exported(const char *name, const char *namespace,
s->module = mod;
}
}
+ free(s->namespace);
+ s->namespace = namespace ? strdup(namespace) : NULL;
s->preloaded = 0;
s->vmlinux = is_vmlinux(mod->name);
s->kernel = 0;
@@ -672,7 +671,8 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
unsigned int crc;
enum export export;
bool is_crc = false;
- const char *name, *namespace;
+ const char *name;
+ char *namespace;
if ((!is_vmlinux(mod->name) || mod->is_dot_o) &&
strstarts(symname, "__ksymtab"))
@@ -747,6 +747,7 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
name = symname + strlen("__ksymtab_");
namespace = sym_extract_namespace(&name);
sym_add_exported(name, namespace, mod, export);
+ free(namespace);
}
if (strcmp(symname, "init_module") == 0)
mod->has_init = 1;
@@ -2195,7 +2196,7 @@ static int check_exports(struct module *mod)
else
basename = mod->name;
- if (exp->namespace) {
+ if (exp->namespace && exp->namespace[0]) {
add_namespace(&mod->required_namespaces,
exp->namespace);