This is a note to let you know that I've just added the patch titled
EDAC/skx: Fix overflows on the DRAM row address mapping arrays
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
edac-skx-fix-overflows-on-the-dram-row-address-mappi.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5dc44ecd534a6aeae9c2d1c374acd13171246609
Author: Qiuxu Zhuo <qiuxu.zhuo@xxxxxxxxx>
Date: Sat Feb 11 09:17:28 2023 +0800
EDAC/skx: Fix overflows on the DRAM row address mapping arrays
[ Upstream commit 71b1e3ba3fed5a34c5fac6d3a15c2634b04c1eb7 ]
The current DRAM row address mapping arrays skx_{open,close}_row[]
only support ranks with sizes up to 16G. Decoding a rank address
to a DRAM row address for a 32G rank by using either one of the
above arrays by the skx_edac driver, will result in an overflow on
the array.
For a 32G rank, the most significant DRAM row address bit (the
bit17) is mapped from the bit34 of the rank address. Add this new
mapping item to both arrays to fix the overflow issue.
Fixes: 4ec656bdf43a ("EDAC, skx_edac: Add EDAC driver for Skylake")
Reported-by: Feng Xu <feng.f.xu@xxxxxxxxx>
Tested-by: Feng Xu <feng.f.xu@xxxxxxxxx>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@xxxxxxxxx>
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
Link: https://lore.kernel.org/all/20230211011728.71764-1-qiuxu.zhuo@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/edac/skx_edac.c b/drivers/edac/skx_edac.c
index b97803580d70f..38a82a3f45167 100644
--- a/drivers/edac/skx_edac.c
+++ b/drivers/edac/skx_edac.c
@@ -825,13 +825,13 @@ static bool skx_rir_decode(struct decoded_addr *res)
}
static u8 skx_close_row[] = {
- 15, 16, 17, 18, 20, 21, 22, 28, 10, 11, 12, 13, 29, 30, 31, 32, 33
+ 15, 16, 17, 18, 20, 21, 22, 28, 10, 11, 12, 13, 29, 30, 31, 32, 33, 34
};
static u8 skx_close_column[] = {
3, 4, 5, 14, 19, 23, 24, 25, 26, 27
};
static u8 skx_open_row[] = {
- 14, 15, 16, 20, 28, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33
+ 14, 15, 16, 20, 28, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34
};
static u8 skx_open_column[] = {
3, 4, 5, 6, 7, 8, 9, 10, 11, 12
