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authorAllen Hubbe <Allen.Hubbe@emc.com>2015-07-13 08:07:13 -0400
committerJon Mason <jdmason@kudzu.us>2015-08-09 16:32:22 -0400
commit8c9edf63e75f036b42afb4502deb20bbfb5004b4 (patch)
treee1a20719e91d54e26384642d8665854b44cb7ed7 /drivers/ntb
parent8b5a22d8f18496f5921ccb92554a7051cbfd9b0c (diff)
downloadlinux-8c9edf63e75f036b42afb4502deb20bbfb5004b4.tar.bz2
NTB: Fix zero size or integer overflow in ntb_set_mw
A plain 32 bit integer will overflow for values over 4GiB. Change the plain integer size to the appropriate size type in ntb_set_mw. Change the type of the size parameter and two local variables used for size. Even if there is no overflow, a size of zero is invalid here. Reported-by: Juyoung Jung <jjung@micron.com> Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb')
-rw-r--r--drivers/ntb/ntb_transport.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index b82171e3e07d..bc556e2d7f62 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -629,13 +629,16 @@ static void ntb_free_mw(struct ntb_transport_ctx *nt, int num_mw)
}
static int ntb_set_mw(struct ntb_transport_ctx *nt, int num_mw,
- unsigned int size)
+ resource_size_t size)
{
struct ntb_transport_mw *mw = &nt->mw_vec[num_mw];
struct pci_dev *pdev = nt->ndev->pdev;
- unsigned int xlat_size, buff_size;
+ size_t xlat_size, buff_size;
int rc;
+ if (!size)
+ return -EINVAL;
+
xlat_size = round_up(size, mw->xlat_align_size);
buff_size = round_up(size, mw->xlat_align);
@@ -655,7 +658,7 @@ static int ntb_set_mw(struct ntb_transport_ctx *nt, int num_mw,
if (!mw->virt_addr) {
mw->xlat_size = 0;
mw->buff_size = 0;
- dev_err(&pdev->dev, "Unable to alloc MW buff of size %d\n",
+ dev_err(&pdev->dev, "Unable to alloc MW buff of size %zu\n",
buff_size);
return -ENOMEM;
}