From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198
---
kernel/drivers/infiniband/sw/siw/siw_cq.c | 24 ++++++++++++++++++++++--
1 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/kernel/drivers/infiniband/sw/siw/siw_cq.c b/kernel/drivers/infiniband/sw/siw/siw_cq.c
index d68e378..403029d 100644
--- a/kernel/drivers/infiniband/sw/siw/siw_cq.c
+++ b/kernel/drivers/infiniband/sw/siw/siw_cq.c
@@ -56,8 +56,6 @@
if (READ_ONCE(cqe->flags) & SIW_WQE_VALID) {
memset(wc, 0, sizeof(*wc));
wc->wr_id = cqe->id;
- wc->status = map_cqe_status[cqe->status].ib;
- wc->opcode = map_wc_opcode[cqe->opcode];
wc->byte_len = cqe->bytes;
/*
@@ -71,10 +69,32 @@
wc->wc_flags = IB_WC_WITH_INVALIDATE;
}
wc->qp = cqe->base_qp;
+ wc->opcode = map_wc_opcode[cqe->opcode];
+ wc->status = map_cqe_status[cqe->status].ib;
siw_dbg_cq(cq,
"idx %u, type %d, flags %2x, id 0x%pK\n",
cq->cq_get % cq->num_cqe, cqe->opcode,
cqe->flags, (void *)(uintptr_t)cqe->id);
+ } else {
+ /*
+ * A malicious user may set invalid opcode or
+ * status in the user mmapped CQE array.
+ * Sanity check and correct values in that case
+ * to avoid out-of-bounds access to global arrays
+ * for opcode and status mapping.
+ */
+ u8 opcode = cqe->opcode;
+ u16 status = cqe->status;
+
+ if (opcode >= SIW_NUM_OPCODES) {
+ opcode = 0;
+ status = SIW_WC_GENERAL_ERR;
+ } else if (status >= SIW_NUM_WC_STATUS) {
+ status = SIW_WC_GENERAL_ERR;
+ }
+ wc->opcode = map_wc_opcode[opcode];
+ wc->status = map_cqe_status[status].ib;
+
}
WRITE_ONCE(cqe->flags, 0);
cq->cq_get++;
--
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