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authorRusty Russell <rusty@rustcorp.com.au>2009-09-25 02:32:59 -0400
committerRusty Russell <rusty@rustcorp.com.au>2009-09-24 11:02:59 -0400
commitffa9f12a41ec117207e8d953f90b9c179546c8d7 (patch)
treec587166a485b631bc8645caec4eff6f2e9f295fe /kernel/module.c
parenta263f7763c364015f92e7c097fa46c6673f6fcb0 (diff)
module: don't call percpu_modfree on NULL pointer.
The general one handles NULL, the static obsolescent (CONFIG_HAVE_LEGACY_PER_CPU_AREA) one in module.c doesn't; Eric's commit 720eba31 assumed it did, and various frobbings since then kept that assumption. All other callers in module.c all protect it with an if; this effectively does the same as free_init is only goto if we fail percpu_modalloc(). Reported-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Eric Dumazet <dada1@cosmosbay.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: Américo Wang <xiyou.wangcong@gmail.com> Tested-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/module.c')
-rw-r--r--kernel/module.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/module.c b/kernel/module.c
index c54f10d90e1c..5a29397ca4b6 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2523,8 +2523,8 @@ static noinline struct module *load_module(void __user *umod,
2523 free_unload: 2523 free_unload:
2524 module_unload_free(mod); 2524 module_unload_free(mod);
2525#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP) 2525#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP)
2526 free_init:
2527 percpu_modfree(mod->refptr); 2526 percpu_modfree(mod->refptr);
2527 free_init:
2528#endif 2528#endif
2529 module_free(mod, mod->module_init); 2529 module_free(mod, mod->module_init);
2530 free_core: 2530 free_core: