Commit e002dcc0 authored by Sebastian Sanchez's avatar Sebastian Sanchez Committed by Doug Ledford
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staging/rdma/hfi1: Fix for module parameter rcvhdrcnt when it's 2097152



The driver crashes when loaded with parameter rcvhdrcnt=2097152.
The root cause was that rcvhdrcnt was initially a 32 bit variable
and its value was assigned to a 16 bit variable, truncating the
upper 16 bits. This patch prevents the user from passing a value
for rcvhdrcnt greater than 16352 (Maximum number for rcvhdrcnt).

Reviewed-by: default avatarDean Luick <dean.luick@intel.com>
Reviewed-by: default avatarMitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: default avatarSebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: default avatarJubin John <jubin.john@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 23cd4716
......@@ -77,6 +77,7 @@
#define HFI1_MIN_USER_CTXT_BUFCNT 7
#define HFI1_MIN_HDRQ_EGRBUF_CNT 2
#define HFI1_MAX_HDRQ_EGRBUF_CNT 16352
#define HFI1_MIN_EAGER_BUFFER_SIZE (4 * 1024) /* 4KB */
#define HFI1_MAX_EAGER_BUFFER_SIZE (256 * 1024) /* 256KB */
......@@ -1355,6 +1356,13 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
ret = -EINVAL;
goto bail;
}
if (rcvhdrcnt > HFI1_MAX_HDRQ_EGRBUF_CNT) {
hfi1_early_err(&pdev->dev,
"Receive header queue count cannot be greater than %u\n",
HFI1_MAX_HDRQ_EGRBUF_CNT);
ret = -EINVAL;
goto bail;
}
/* use the encoding function as a sanitization check */
if (!encode_rcv_header_entry_size(hfi1_hdrq_entsize)) {
hfi1_early_err(&pdev->dev, "Invalid HdrQ Entry size %u\n",
......
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