4.19-stable review patch. If anyone has any objections, please let me know.
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From: Qiuxu Zhuo qiuxu.zhuo@intel.com
commit 8f18973877204dc8ca4ce1004a5d28683b9a7086 upstream.
The code "lchan = (lchan << 1) | ~lchan" for logical channel intermediate decoding is wrong. The wrong intermediate decoding result is {0xffffffff, 0xfffffffe}.
Fix it by replacing '~' with '!'. The correct intermediate decoding result is {0x1, 0x2}.
Signed-off-by: Qiuxu Zhuo qiuxu.zhuo@intel.com Signed-off-by: Tony Luck tony.luck@intel.com Signed-off-by: Borislav Petkov bp@suse.de CC: Aristeu Rozanski aris@redhat.com CC: Mauro Carvalho Chehab mchehab@kernel.org CC: linux-edac linux-edac@vger.kernel.org Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20181009172025.18594-1-tony.luck@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/edac/skx_edac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/edac/skx_edac.c +++ b/drivers/edac/skx_edac.c @@ -668,7 +668,7 @@ sad_found: break; case 2: lchan = (addr >> shift) % 2; - lchan = (lchan << 1) | ~lchan; + lchan = (lchan << 1) | !lchan; break; case 3: lchan = ((addr >> shift) % 2) << 1;