mirror of
https://github.com/darlinghq/darling-xnu.git
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72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
/*
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* Proof of Concept / Test Case
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* XNU: aio_work_thread use-after-free for AIO_FSYNC entries
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*/
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#include <err.h>
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <sys/aio.h>
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#include <unistd.h>
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#include <darwintest.h>
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#include <time.h>
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T_GLOBAL_META(
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T_META_NAMESPACE("xnu.vfs"),
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T_META_RUN_CONCURRENTLY(true));
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#define NREQUESTS 8
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static void
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attempt(int fd)
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{
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struct aiocb ap[NREQUESTS];
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size_t n;
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unsigned char c;
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for (n = 0; n < NREQUESTS; ++n) {
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ap[n].aio_fildes = fd;
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ap[n].aio_nbytes = 1;
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ap[n].aio_buf = &c;
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ap[n].aio_sigevent.sigev_notify = SIGEV_NONE;
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}
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/*
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* fire them off and exit.
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*/
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for (n = 0; n < NREQUESTS; ++n) {
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aio_fsync((n & 1) ? O_SYNC : O_DSYNC, &ap[n]);
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}
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exit(0);
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}
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T_DECL(lio_listio_race_63669270, "test for the lightspeed/unc0ver UaF")
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{
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pid_t child;
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int fd;
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char path[128];
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uint64_t end = clock_gettime_nsec_np(CLOCK_UPTIME_RAW) + 10 * NSEC_PER_SEC;
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/* we need a valid fd: */
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strcpy(path, "/tmp/aio_fsync_uaf.XXXXXX");
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T_EXPECT_POSIX_SUCCESS(fd = mkstemp(path), "mkstemp");
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T_EXPECT_POSIX_SUCCESS(unlink(path), "unlink");
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T_LOG("starting...");
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do {
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switch ((child = fork())) {
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case -1: T_FAIL("fork");
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case 0: attempt(fd);
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}
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T_QUIET; T_EXPECT_POSIX_SUCCESS(waitpid(child, NULL, 0), "waitpid");
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} while (clock_gettime_nsec_np(CLOCK_UPTIME_RAW) < end);
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T_PASS("the system didn't panic");
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}
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