Added a simple mangle testcase which messes with the ucontext_t from within the sig_handler, trying to badly modify the PC to point toward Kernel land. Expects SIGSEGV on test PASS.
Signed-off-by: Cristian Marussi cristian.marussi@arm.com --- .../arm64/signal/testcases/.gitignore | 1 + .../signal/testcases/mangle_pc_invalid.c | 24 +++++++++++++++++++ 2 files changed, 25 insertions(+) create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pc_invalid.c
diff --git a/tools/testing/selftests/arm64/signal/testcases/.gitignore b/tools/testing/selftests/arm64/signal/testcases/.gitignore index 7f7414d241f2..a87fb0f0d2cf 100644 --- a/tools/testing/selftests/arm64/signal/testcases/.gitignore +++ b/tools/testing/selftests/arm64/signal/testcases/.gitignore @@ -1 +1,2 @@ mangle_sp_misaligned +mangle_pc_invalid diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pc_invalid.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pc_invalid.c new file mode 100644 index 000000000000..0024032528bc --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pc_invalid.c @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2019 ARM Limited */ + +#include "test_signals_utils.h" +#include "testcases.h" + +static int mangle_invalid_pc_run(struct tdescr *td, siginfo_t *si, + ucontext_t *uc) +{ + ASSERT_GOOD_CONTEXT(uc); + + uc->uc_mcontext.pc = 0xffffffffcccccccc; + + return 1; +} + +struct tdescr tde = { + .sanity_disabled = true, + .name = "MANGLE_PC_INVALID", + .descr = "Mangling uc_mcontext with INVALID PC", + .sig_trig = SIGUSR1, + .sig_ok = SIGSEGV, + .run = mangle_invalid_pc_run, +};