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authorRusty Russell <rusty@rustcorp.com.au>2009-09-25 00:32:58 -0600
committerRusty Russell <rusty@rustcorp.com.au>2009-09-25 00:32:59 +0930
commita263f7763c364015f92e7c097fa46c6673f6fcb0 (patch)
tree3fecc1a81f60ef71bc59c751f298496f9b0b1da6
parent1d7015caa082d465faeae5d6fd1be077ee6dfa87 (diff)
downloadop-kernel-dev-a263f7763c364015f92e7c097fa46c6673f6fcb0.zip
op-kernel-dev-a263f7763c364015f92e7c097fa46c6673f6fcb0.tar.gz
module: fix memory leak when load fails after srcversion/version allocated
Normally the twisty paths of sysfs will free the attributes, but not if we fail before we hook it into sysfs (which is the last thing we do in load_module). (This sysfs code is a turd, no doubt there are other issues lurking too). Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
-rw-r--r--kernel/module.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/module.c b/kernel/module.c
index 39827c3..c54f10d 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1797,6 +1797,17 @@ static void setup_modinfo(struct module *mod, Elf_Shdr *sechdrs,
}
}
+static void free_modinfo(struct module *mod)
+{
+ struct module_attribute *attr;
+ int i;
+
+ for (i = 0; (attr = modinfo_attrs[i]); i++) {
+ if (attr->free)
+ attr->free(mod);
+ }
+}
+
#ifdef CONFIG_KALLSYMS
/* lookup symbol in given range of kernel_symbols */
@@ -2506,6 +2517,7 @@ static noinline struct module *load_module(void __user *umod,
synchronize_sched();
module_arch_cleanup(mod);
cleanup:
+ free_modinfo(mod);
kobject_del(&mod->mkobj.kobj);
kobject_put(&mod->mkobj.kobj);
free_unload:
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