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[Qemu-devel] [PATCH 1/7] hw/misc: mips_itu: Fix 32/64 bit issue in a lin
From: |
Aleksandar Markovic |
Subject: |
[Qemu-devel] [PATCH 1/7] hw/misc: mips_itu: Fix 32/64 bit issue in a line involving shift operator |
Date: |
Mon, 18 Feb 2019 16:31:31 +0100 |
From: Aleksandar Markovic <address@hidden>
Fix 32/64 bit issue in a line involving shift operator. "1 << ..."
calculation of size is done as a 32-bit signed integer which may
then be unintentionally sign-extended into the 64-bit result. The
problem was discovered by Coverity (CID 1398648). Using "1ULL"
instead of "1" on the LHS of the shift fixes this problem.
Reproted-by: Peter Maydell <address@hidden>
Signed-off-by: Aleksandar Markovic <address@hidden>
---
hw/misc/mips_itu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/misc/mips_itu.c b/hw/misc/mips_itu.c
index 1257d8f..3afdbe6 100644
--- a/hw/misc/mips_itu.c
+++ b/hw/misc/mips_itu.c
@@ -94,7 +94,7 @@ void itc_reconfigure(MIPSITUState *tag)
if (tag->saar_present) {
address = ((*(uint64_t *) tag->saar) & 0xFFFFFFFFE000ULL) << 4;
- size = 1 << ((*(uint64_t *) tag->saar >> 1) & 0x1f);
+ size = 1ULL << ((*(uint64_t *) tag->saar >> 1) & 0x1f);
is_enabled = *(uint64_t *) tag->saar & 1;
}
--
2.7.4
- [Qemu-devel] [PATCH 0/7] Misc target/mips fixes and improvements, Aleksandar Markovic, 2019/02/18
- [Qemu-devel] [PATCH 3/7] tests/tcg: target/mips: Change directory name 'bit-counting' to 'bit-count', Aleksandar Markovic, 2019/02/18
- [Qemu-devel] [PATCH 4/7] tests/tcg: target/mips: Add wrappers for MSA integer compare instructions, Aleksandar Markovic, 2019/02/18
- [Qemu-devel] [PATCH 1/7] hw/misc: mips_itu: Fix 32/64 bit issue in a line involving shift operator,
Aleksandar Markovic <=
- [Qemu-devel] [PATCH 2/7] tests/tcg: target/mips: Correct path to headers in some test source files, Aleksandar Markovic, 2019/02/18
- [Qemu-devel] [PATCH 6/7] disas: nanoMIPS: Correct comments to handlers of some DSP instructions, Aleksandar Markovic, 2019/02/18
- [Qemu-devel] [PATCH 7/7] disas: nanoMIPS: Fix a function misnomer, Aleksandar Markovic, 2019/02/18
- [Qemu-devel] [PATCH 5/7] tests/tcg: target/mips: Add tests for MSA integer compare instructions, Aleksandar Markovic, 2019/02/18