/* * Copyright 2015, Michael Neuling, IBM Corp. * Licensed under GPLv2. * * Test the kernel's signal return code to ensure that it doesn't * crash when both the transactional and suspend MSR bits are set in * the signal context. * * For this test, we send ourselves a SIGUSR1. In the SIGUSR1 handler * we modify the signal context to set both MSR TM S and T bits (which * is "reserved" by the PowerISA). When we return from the signal * handler (implicit sigreturn), the kernel should detect reserved MSR * value and send us with a SIGSEGV. */ #include #include #include #include #include "utils.h" #include "tm.h" int segv_expected = 0; void signal_segv(int signum) { if (segv_expected && (signum == SIGSEGV)) _exit(0); _exit(1); } void signal_usr1(int signum, siginfo_t *info, void *uc) { ucontext_t *ucp = uc; /* Link tm checkpointed context to normal context */ ucp->uc_link = ucp; /* Set all TM bits so that the context is now invalid */ #ifdef __powerpc64__ ucp->uc_mcontext.gp_regs[PT_MSR] |= (7ULL << 32); #else ucp->uc_mcontext.uc_regs->gregs[PT_MSR] |= (7ULL); #endif /* Should segv on return becuase of invalid context */ segv_expected = 1; } int tm_signal_msr_resv() { struct sigaction act; SKIP_IF(!have_htm()); act.sa_sigaction = signal_usr1; sigemptyset(&act.sa_mask); act.sa_flags = SA_SIGINFO; if (sigaction(SIGUSR1, &act, NULL) < 0) { perror("sigaction sigusr1"); exit(1); } if (signal(SIGSEGV, signal_segv) == SIG_ERR) exit(1); raise(SIGUSR1); /* We shouldn't get here as we exit in the segv handler */ return 1; } int main(void) { return test_harness(tm_signal_msr_resv, "tm_signal_msr_resv"); } 6'>refslogtreecommitdiff
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authorLaura Abbott <labbott@redhat.com>2016-12-21 12:32:54 -0800
committerHerbert Xu <herbert@gondor.apana.org.au>2016-12-27 17:32:11 +0800
commit02608e02fbec04fccf2eb0cc8d8082f65c0a4286 (patch)
tree37ff0410d130cfe77185f591b07cd6403f207f0c /tools/testing/selftests/rcutorture/configs/rcu/TREE06.boot
parent7ce7d89f48834cefece7804d38fc5d85382edf77 (diff)
crypto: testmgr - Use heap buffer for acomp test input
Christopher Covington reported a crash on aarch64 on recent Fedora kernels: kernel BUG at ./include/linux/scatterlist.h:140! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP Modules linked in: CPU: 2 PID: 752 Comm: cryptomgr_test Not tainted 4.9.0-11815-ge93b1cc #162 Hardware name: linux,dummy-virt (DT) task: ffff80007c650080 task.stack: ffff800008910000 PC is at sg_init_one+0xa0/0xb8 LR is at sg_init_one+0x24/0xb8 ... [<ffff000008398db8>] sg_init_one+0xa0/0xb8 [<ffff000008350a44>] test_acomp+0x10c/0x438 [<ffff000008350e20>] alg_test_comp+0xb0/0x118 [<ffff00000834f28c>] alg_test+0x17c/0x2f0 [<ffff00000834c6a4>] cryptomgr_test+0x44/0x50 [<ffff0000080dac70>] kthread+0xf8/0x128 [<ffff000008082ec0>] ret_from_fork+0x10/0x50 The test vectors used for input are part of the kernel image. These inputs are passed as a buffer to sg_init_one which eventually blows up with BUG_ON(!virt_addr_valid(buf)). On arm64, virt_addr_valid returns false for the kernel image since virt_to_page will not return the correct page. Fix this by copying the input vectors to heap buffer before setting up the scatterlist. Reported-by: Christopher Covington <cov@codeaurora.org> Fixes: d7db7a882deb ("crypto: acomp - update testmgr with support for acomp") Signed-off-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'tools/testing/selftests/rcutorture/configs/rcu/TREE06.boot')