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[PATCH] SiS DRM: Fix possible NULL dereference

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This fixes a NULL pointer reference in DRM.  The SiS driver tries to
allocate a big chunk of memory, but the return value is never checked.

Reported in Novell bugzilla #132271:
  https://bugzilla.novell.com/show_bug.cgi?id=132271

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Egbert Eich 2005-11-30 15:32:59 +01:00 committed by Linus Torvalds
parent d2ef5ebb4c
commit c801147c5a
1 changed files with 4 additions and 1 deletions
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5
drivers/char/drm/drm_context.c
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@ -432,7 +432,10 @@ int drm_addctx(struct inode *inode, struct file *filp,
if (ctx.handle != DRM_KERNEL_CONTEXT) {
if (dev->driver->context_ctor)
dev->driver->context_ctor(dev, ctx.handle);
if (!dev->driver->context_ctor(dev, ctx.handle)) {
DRM_DEBUG( "Running out of ctxs or memory.\n");
return -ENOMEM;
}
}
ctx_entry = drm_alloc(sizeof(*ctx_entry), DRM_MEM_CTXLIST);