From: Brandon Philips Date: Sun, 9 Dec 2007 02:05:53 +0000 (-0300) Subject: V4L/DVB (6751): V4L: Memory leak! Fix count in videobuf-vmalloc mmap X-Git-Tag: v2.6.24-rc6~88 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b29669c065f60501e7289e1950fa2a618962358;p=linux-2.6 V4L/DVB (6751): V4L: Memory leak! Fix count in videobuf-vmalloc mmap This is pretty serious bug. map->count is never initialized after the call to kmalloc making the count start at some random trash value. The end result is leaking videobufs. Also, fix up the debug statements to print unsigned values. Pushed to http://ifup.org/hg/v4l-dvb too Signed-off-by: Brandon Philips Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/video/videobuf-vmalloc.c b/drivers/media/video/videobuf-vmalloc.c index cd74341c98..e01259438b 100644 --- a/drivers/media/video/videobuf-vmalloc.c +++ b/drivers/media/video/videobuf-vmalloc.c @@ -51,7 +51,7 @@ videobuf_vm_open(struct vm_area_struct *vma) { struct videobuf_mapping *map = vma->vm_private_data; - dprintk(2,"vm_open %p [count=%d,vma=%08lx-%08lx]\n",map, + dprintk(2,"vm_open %p [count=%u,vma=%08lx-%08lx]\n",map, map->count,vma->vm_start,vma->vm_end); map->count++; @@ -64,7 +64,7 @@ videobuf_vm_close(struct vm_area_struct *vma) struct videobuf_queue *q = map->q; int i; - dprintk(2,"vm_close %p [count=%d,vma=%08lx-%08lx]\n",map, + dprintk(2,"vm_close %p [count=%u,vma=%08lx-%08lx]\n",map, map->count,vma->vm_start,vma->vm_end); map->count--; @@ -221,7 +221,7 @@ static int __videobuf_mmap_mapper(struct videobuf_queue *q, } /* create mapping + update buffer list */ - map = q->bufs[first]->map = kmalloc(sizeof(struct videobuf_mapping),GFP_KERNEL); + map = q->bufs[first]->map = kzalloc(sizeof(struct videobuf_mapping),GFP_KERNEL); if (NULL == map) return -ENOMEM;