From 7861c7a4ca5c637f3cad1e343602a15e857140fd Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 16 Jun 2015 13:49:32 +0300 Subject: [PATCH 0270/1050] drm/amdkfd: fix some range checks in address watch ioctl buf_size_in_bytes must be large enough to hold ->num_watch_points and watch_mode so I have added a sizeof(int) * 2 to the minimum size. Also we have to subtract sizeof(*args) from the max args_idx limit so that it matches the allocation. Also I changed a > to >= for the last compare. Signed-off-by: Dan Carpenter Signed-off-by: Oded Gabbay --- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index 96c904b..c991973 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -553,7 +553,7 @@ static int kfd_ioctl_dbg_address_watch(struct file *filep, /* Validate arguments */ if ((args->buf_size_in_bytes > MAX_ALLOWED_AW_BUFF_SIZE) || - (args->buf_size_in_bytes <= sizeof(*args)) || + (args->buf_size_in_bytes <= sizeof(*args) + sizeof(int) * 2) || (cmd_from_user == NULL)) return -EINVAL; @@ -590,7 +590,7 @@ static int kfd_ioctl_dbg_address_watch(struct file *filep, /* skip over the addresses buffer */ args_idx += sizeof(aw_info.watch_address) * aw_info.num_watch_points; - if (args_idx >= args->buf_size_in_bytes) { + if (args_idx >= args->buf_size_in_bytes - sizeof(*args)) { kfree(args_buff); return -EINVAL; } @@ -614,7 +614,7 @@ static int kfd_ioctl_dbg_address_watch(struct file *filep, args_idx += sizeof(aw_info.watch_mask); } - if (args_idx > args->buf_size_in_bytes) { + if (args_idx >= args->buf_size_in_bytes - sizeof(args)) { kfree(args_buff); return -EINVAL; } -- 1.9.1