inject-ra-err.c (1253B)
1// SPDX-License-Identifier: GPL-2.0-or-later 2 3#include <errno.h> 4#include <fcntl.h> 5#include <signal.h> 6#include <stdio.h> 7#include <string.h> 8#include <sys/ioctl.h> 9#include <sys/mman.h> 10#include <sys/stat.h> 11#include <sys/types.h> 12#include <unistd.h> 13 14#include "vas-api.h" 15#include "utils.h" 16 17static bool faulted; 18 19static void sigbus_handler(int n, siginfo_t *info, void *ctxt_v) 20{ 21 ucontext_t *ctxt = (ucontext_t *)ctxt_v; 22 struct pt_regs *regs = ctxt->uc_mcontext.regs; 23 24 faulted = true; 25 regs->nip += 4; 26} 27 28static int test_ra_error(void) 29{ 30 struct vas_tx_win_open_attr attr; 31 int fd, *paste_addr; 32 char *devname = "/dev/crypto/nx-gzip"; 33 struct sigaction act = { 34 .sa_sigaction = sigbus_handler, 35 .sa_flags = SA_SIGINFO, 36 }; 37 38 memset(&attr, 0, sizeof(attr)); 39 attr.version = 1; 40 attr.vas_id = 0; 41 42 SKIP_IF(access(devname, F_OK)); 43 44 fd = open(devname, O_RDWR); 45 FAIL_IF(fd < 0); 46 FAIL_IF(ioctl(fd, VAS_TX_WIN_OPEN, &attr) < 0); 47 FAIL_IF(sigaction(SIGBUS, &act, NULL) != 0); 48 49 paste_addr = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0ULL); 50 51 /* The following assignment triggers exception */ 52 mb(); 53 *paste_addr = 1; 54 mb(); 55 56 FAIL_IF(!faulted); 57 58 return 0; 59} 60 61int main(void) 62{ 63 return test_harness(test_ra_error, "inject-ra-err"); 64} 65