| Message ID | 20190902112932.36129-4-cristian.marussi@arm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Add arm64/signal initial kselftest support | expand |
On Mon, Sep 02, 2019 at 12:29:24pm +0100, Cristian Marussi wrote: > Add a simple mangle testcase which messes with the ucontext_t from within > the signal handler, trying to set PSTATE DAIF bits to an invalid value > (masking everything). Expects SIGSEGV on test PASS. > > Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> Reviewed-by: Dave Martin <Dave.Martin@arm.com> > --- > v3 --> v4 > - fixed commit message > - added testcase comment description > --- > .../mangle_pstate_invalid_daif_bits.c | 35 +++++++++++++++++++ > 1 file changed, 35 insertions(+) > create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c > > diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c > new file mode 100644 > index 000000000000..434b82597007 > --- /dev/null > +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c > @@ -0,0 +1,35 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (C) 2019 ARM Limited > + * > + * Try to mangle the ucontext from inside a signal handler, mangling the > + * DAIF bits in an illegal manner: this attempt must be spotted by Kernel > + * and the test case is expected to be terminated via SEGV. > + * > + */ > + > +#include "test_signals_utils.h" > +#include "testcases.h" > + > +static int mangle_invalid_pstate_run(struct tdescr *td, siginfo_t *si, > + ucontext_t *uc) > +{ > + ASSERT_GOOD_CONTEXT(uc); > + > + /* > + * This config should trigger a SIGSEGV by Kernel when it checks > + * the sigframe consistency in valid_user_regs() routine. > + */ > + uc->uc_mcontext.pstate |= PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT; > + > + return 1; > +} > + > +struct tdescr tde = { > + .sanity_disabled = true, > + .name = "MANGLE_PSTATE_INVALID_DAIF_BITS", > + .descr = "Mangling uc_mcontext with INVALID DAIF_BITS", > + .sig_trig = SIGUSR1, > + .sig_ok = SIGSEGV, > + .run = mangle_invalid_pstate_run, > +}; > -- > 2.17.1 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c new file mode 100644 index 000000000000..434b82597007 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 ARM Limited + * + * Try to mangle the ucontext from inside a signal handler, mangling the + * DAIF bits in an illegal manner: this attempt must be spotted by Kernel + * and the test case is expected to be terminated via SEGV. + * + */ + +#include "test_signals_utils.h" +#include "testcases.h" + +static int mangle_invalid_pstate_run(struct tdescr *td, siginfo_t *si, + ucontext_t *uc) +{ + ASSERT_GOOD_CONTEXT(uc); + + /* + * This config should trigger a SIGSEGV by Kernel when it checks + * the sigframe consistency in valid_user_regs() routine. + */ + uc->uc_mcontext.pstate |= PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT; + + return 1; +} + +struct tdescr tde = { + .sanity_disabled = true, + .name = "MANGLE_PSTATE_INVALID_DAIF_BITS", + .descr = "Mangling uc_mcontext with INVALID DAIF_BITS", + .sig_trig = SIGUSR1, + .sig_ok = SIGSEGV, + .run = mangle_invalid_pstate_run, +};
Add a simple mangle testcase which messes with the ucontext_t from within the signal handler, trying to set PSTATE DAIF bits to an invalid value (masking everything). Expects SIGSEGV on test PASS. Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> --- v3 --> v4 - fixed commit message - added testcase comment description --- .../mangle_pstate_invalid_daif_bits.c | 35 +++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c