From: Arnd Bergmann Date: Tue, 6 Dec 2005 03:52:23 +0000 (-0500) Subject: [PATCH] spufs: Fix oops when spufs module is not loaded X-Git-Tag: v2.6.16-rc1~666^2~69 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=b41305a39a6966d8e8b1449d6b7c194923bfb451;p=linux-2.6-omap-h63xx.git [PATCH] spufs: Fix oops when spufs module is not loaded try_module_get returns true when NULL arguments, so we first need to check if there is a module loaded before getting the reference count. Signed-off-by: Arnd Bergmann Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/platforms/cell/spu_syscalls.c b/arch/powerpc/platforms/cell/spu_syscalls.c index 43e0b187ffd..91d564df944 100644 --- a/arch/powerpc/platforms/cell/spu_syscalls.c +++ b/arch/powerpc/platforms/cell/spu_syscalls.c @@ -37,11 +37,12 @@ asmlinkage long sys_spu_create(const char __user *name, unsigned int flags, mode_t mode) { long ret; + struct module *owner = spufs_calls.owner; ret = -ENOSYS; - if (try_module_get(spufs_calls.owner)) { + if (owner && try_module_get(spufs_calls.owner)) { ret = spufs_calls.create_thread(name, flags, mode); - module_put(spufs_calls.owner); + module_put(owner); } return ret; } @@ -51,16 +52,17 @@ asmlinkage long sys_spu_run(int fd, __u32 __user *unpc, __u32 __user *ustatus) long ret; struct file *filp; int fput_needed; + struct module *owner = spufs_calls.owner; ret = -ENOSYS; - if (try_module_get(spufs_calls.owner)) { + if (owner && try_module_get(owner)) { ret = -EBADF; filp = fget_light(fd, &fput_needed); if (filp) { ret = spufs_calls.spu_run(filp, unpc, ustatus); fput_light(filp, fput_needed); } - module_put(spufs_calls.owner); + module_put(owner); } return ret; }