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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-11 08:31:58 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-11 08:31:58 +0400
commitc8d6637d0497d62093dbba0694c7b3a80b79bfe1 (patch)
tree4ef432511fa6fa959429e1fc961fb186f1745e54 /include
parent801a71a858631109a64bf30b1c480b0a18386605 (diff)
parent76215b04fd297c008b91ece732ed36e67e0181fa (diff)
downloadlinux-c8d6637d0497d62093dbba0694c7b3a80b79bfe1.tar.xz
Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull module updates from Rusty Russell: "This finally applies the stricter sysfs perms checking we pulled out before last merge window. A few stragglers are fixed (thanks linux-next!)" * tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: arch/powerpc/platforms/powernv/opal-dump.c: fix world-writable sysfs files arch/powerpc/platforms/powernv/opal-elog.c: fix world-writable sysfs files drivers/video/fbdev/s3c2410fb.c: don't make debug world-writable. ARM: avoid ARM binutils leaking ELF local symbols scripts: modpost: Remove numeric suffix pattern matching scripts: modpost: fix compilation warning sysfs: disallow world-writable files. module: return bool from within_module*() module: add within_module() function modules: Fix build error in moduleloader.h
Diffstat (limited to 'include')
-rw-r--r--include/linux/kernel.h2
-rw-r--r--include/linux/module.h11
-rw-r--r--include/linux/moduleloader.h6
3 files changed, 15 insertions, 4 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 31ae66f34235..95624bed87ef 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -845,5 +845,7 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
/* User perms >= group perms >= other perms */ \
BUILD_BUG_ON_ZERO(((perms) >> 6) < (((perms) >> 3) & 7)) + \
BUILD_BUG_ON_ZERO((((perms) >> 3) & 7) < ((perms) & 7)) + \
+ /* Other writable? Generally considered a bad idea. */ \
+ BUILD_BUG_ON_ZERO((perms) & 2) + \
(perms))
#endif
diff --git a/include/linux/module.h b/include/linux/module.h
index f520a767c86c..71f282a4e307 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -396,18 +396,25 @@ bool is_module_address(unsigned long addr);
bool is_module_percpu_address(unsigned long addr);
bool is_module_text_address(unsigned long addr);
-static inline int within_module_core(unsigned long addr, const struct module *mod)
+static inline bool within_module_core(unsigned long addr,
+ const struct module *mod)
{
return (unsigned long)mod->module_core <= addr &&
addr < (unsigned long)mod->module_core + mod->core_size;
}
-static inline int within_module_init(unsigned long addr, const struct module *mod)
+static inline bool within_module_init(unsigned long addr,
+ const struct module *mod)
{
return (unsigned long)mod->module_init <= addr &&
addr < (unsigned long)mod->module_init + mod->init_size;
}
+static inline bool within_module(unsigned long addr, const struct module *mod)
+{
+ return within_module_init(addr, mod) || within_module_core(addr, mod);
+}
+
/* Search for module by name: must hold module_mutex. */
struct module *find_module(const char *name);
diff --git a/include/linux/moduleloader.h b/include/linux/moduleloader.h
index 560ca53a75fa..7eeb9bbfb816 100644
--- a/include/linux/moduleloader.h
+++ b/include/linux/moduleloader.h
@@ -45,7 +45,8 @@ static inline int apply_relocate(Elf_Shdr *sechdrs,
unsigned int relsec,
struct module *me)
{
- printk(KERN_ERR "module %s: REL relocation unsupported\n", me->name);
+ printk(KERN_ERR "module %s: REL relocation unsupported\n",
+ module_name(me));
return -ENOEXEC;
}
#endif
@@ -67,7 +68,8 @@ static inline int apply_relocate_add(Elf_Shdr *sechdrs,
unsigned int relsec,
struct module *me)
{
- printk(KERN_ERR "module %s: REL relocation unsupported\n", me->name);
+ printk(KERN_ERR "module %s: REL relocation unsupported\n",
+ module_name(me));
return -ENOEXEC;
}
#endif