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authorMichael Chan <michael.chan@broadcom.com>2019-04-25 22:31:55 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-05-05 14:42:40 +0200
commitf1fd68e934091734c21e3ea21748d272f08b3fee (patch)
tree9c32d63f98fd1fa786748e2bbc173f14114aeb6a
parent396350737326d0e54c848ae14e4eb7160592633d (diff)
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bnxt_en: Fix uninitialized variable usage in bnxt_rx_pkt().
[ Upstream commit 0b397b17a4120cb80f7bf89eb30587b3dd9b0d1d ] In bnxt_rx_pkt(), if the driver encounters BD errors, it will recycle the buffers and jump to the end where the uninitailized variable "len" is referenced. Fix it by adding a new jump label that will skip the length update. This is the most correct fix since the length may not be valid when we get this type of error. Fixes: 6a8788f25625 ("bnxt_en: add support for software dynamic interrupt moderation") Reported-by: Nathan Chancellor <natechancellor@gmail.com> Cc: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 90436c5abbc9..de46331aefc1 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1584,7 +1584,7 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_napi *bnapi, u32 *raw_cons,
netdev_warn(bp->dev, "RX buffer error %x\n", rx_err);
bnxt_sched_reset(bp, rxr);
}
- goto next_rx;
+ goto next_rx_no_len;
}
len = le32_to_cpu(rxcmp->rx_cmp_len_flags_type) >> RX_CMP_LEN_SHIFT;
@@ -1665,12 +1665,13 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_napi *bnapi, u32 *raw_cons,
rc = 1;
next_rx:
- rxr->rx_prod = NEXT_RX(prod);
- rxr->rx_next_cons = NEXT_RX(cons);
-
cpr->rx_packets += 1;
cpr->rx_bytes += len;
+next_rx_no_len:
+ rxr->rx_prod = NEXT_RX(prod);
+ rxr->rx_next_cons = NEXT_RX(cons);
+
next_rx_no_prod_no_len:
*raw_cons = tmp_raw_cons;