Jan Beulich 7c27efebfc x86emul: V{,P}{COMPRESS,EXPAND}* can (wrongly) trigger assertion ...

AFL has pointed out that the op_bytes-is-not-0 assertion in common SIMD
handling can trigger for these insns. Indeed when the (relevant part of)
the controlling mask register is 0, no memory is accessed at all. Leave
op_bytes unaltered in this case, to engage the short-circuiting in common
SIMD handling when fault_suppression is true and op_bytes is 0.

While there also correct a related typo in the test harness.

Fixes: 65f82d4ce1 ("x86emul: support AVX512{F,_VBMI2} compress/expand insns")
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
master commit: cf90c8a48a
master date: 2026-07-20 09:50:00 +0200

2026-07-20 13:30:29 +02:00

..

cpu-policy

tools/tests: Install tests into $(LIBEXEC)/tests

2025-05-28 12:29:33 +01:00

domid

tools/tests/domid: don't pass -E to sed

2025-10-21 14:11:27 +02:00

paging-mempool

tools/tests: Install tests into $(LIBEXEC)/tests

2025-05-28 12:29:33 +01:00

pdx

xen/pdx: fix off-by-one index in offset mask calculation

2026-06-30 14:52:42 +02:00

rangeset

tools/tests: Fix return value of test-rangeset

2025-06-06 12:00:40 +02:00

resource

tools/tests: Install tests into $(LIBEXEC)/tests

2025-05-28 12:29:33 +01:00

tsx

tools/tests: Install tests into $(LIBEXEC)/tests

2025-05-28 12:29:33 +01:00

vpci

vpci: Refactor vpci_remove_register to remove matched registers

2025-09-01 13:07:01 +02:00

x86_emulator

x86emul: V{,P}{COMPRESS,EXPAND}* can (wrongly) trigger assertion

2026-07-20 13:30:29 +02:00

xenstore

tools/tests: Install tests into $(LIBEXEC)/tests

2025-05-28 12:29:33 +01:00

Makefile

tools/tests: introduce unit tests for domain ID allocator

2025-09-04 13:37:18 -07:00