4.9-stable review patch. If anyone has any objections, please let me know.
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From: Martin Schwidefsky schwidefsky@de.ibm.com
[ Upstream commit 467a3bf219cee12259182c5cb4821f88fd518a51 ]
The return from the crc32_le_vgfm_16/crc32c_le_vgfm_16 and the crc32_be_vgfm_16 functions are done with "br %r14". These are indirect branches as well and need to use execute trampolines for CONFIG_EXPOLINE=y.
Cc: stable@vger.kernel.org # 4.16 Fixes: f19fbd5ed6 ("s390: introduce execute-trampolines for branches") Reviewed-by: Hendrik Brueckner brueckner@linux.vnet.ibm.com Signed-off-by: Martin Schwidefsky schwidefsky@de.ibm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/s390/crypto/crc32be-vx.S | 5 ++++- arch/s390/crypto/crc32le-vx.S | 4 +++- 2 files changed, 7 insertions(+), 2 deletions(-)
--- a/arch/s390/crypto/crc32be-vx.S +++ b/arch/s390/crypto/crc32be-vx.S @@ -12,6 +12,7 @@ */
#include <linux/linkage.h> +#include <asm/nospec-insn.h> #include <asm/vx-insn.h>
/* Vector register range containing CRC-32 constants */ @@ -66,6 +67,8 @@
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+ GEN_BR_THUNK %r14 + .text /* * The CRC-32 function(s) use these calling conventions: @@ -202,6 +205,6 @@ ENTRY(crc32_be_vgfm_16)
.Ldone: VLGVF %r2,%v2,3 - br %r14 + BR_EX %r14
.previous --- a/arch/s390/crypto/crc32le-vx.S +++ b/arch/s390/crypto/crc32le-vx.S @@ -13,6 +13,7 @@ */
#include <linux/linkage.h> +#include <asm/nospec-insn.h> #include <asm/vx-insn.h>
/* Vector register range containing CRC-32 constants */ @@ -75,6 +76,7 @@
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+ GEN_BR_THUNK %r14
.text
@@ -263,6 +265,6 @@ crc32_le_vgfm_generic:
.Ldone: VLGVF %r2,%v2,2 - br %r14 + BR_EX %r14
.previous