diff options
| author | Christos Margiolis <christos@FreeBSD.org> | 2026-05-27 15:50:33 +0000 |
|---|---|---|
| committer | Mark Johnston <markj@FreeBSD.org> | 2026-06-08 15:39:32 +0000 |
| commit | c42ee04c521ed8268421173f961859233a321b17 (patch) | |
| tree | 57e5bf8302c31388a8cfe1b0b65f57dbce342608 /tests | |
| parent | 540a315cdb46d6aa3cdbb3797710db652b3c4f4a (diff) | |
sound: Check for offset overflow in dsp_mmap_single()
Approved by: so
Security: FreeBSD-SA-26:27.sound
Security: CVE-2026-45258
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/sys/sound/Makefile | 1 | ||||
| -rw-r--r-- | tests/sys/sound/mmap.c | 51 |
2 files changed, 52 insertions, 0 deletions
diff --git a/tests/sys/sound/Makefile b/tests/sys/sound/Makefile index 74a0765a0540..ce156ae8c4cf 100644 --- a/tests/sys/sound/Makefile +++ b/tests/sys/sound/Makefile @@ -2,6 +2,7 @@ PACKAGE= tests TESTSDIR= ${TESTSBASE}/sys/sound +ATF_TESTS_C+= mmap ATF_TESTS_C+= pcm_read_write ATF_TESTS_C+= sndstat diff --git a/tests/sys/sound/mmap.c b/tests/sys/sound/mmap.c new file mode 100644 index 000000000000..ab203a39194c --- /dev/null +++ b/tests/sys/sound/mmap.c @@ -0,0 +1,51 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2026 The FreeBSD Foundation + */ + +#include <sys/mman.h> +#include <sys/soundcard.h> + +#include <atf-c.h> +#include <errno.h> +#include <fcntl.h> +#include <unistd.h> + +#define FMT_ERR(s) s ": %s", strerror(errno) + +ATF_TC(mmap_offset_overflow); +ATF_TC_HEAD(mmap_offset_overflow, tc) +{ + atf_tc_set_md_var(tc, "descr", "mmap offset overflow test"); + atf_tc_set_md_var(tc, "require.kmods", "snd_dummy"); +} + +ATF_TC_BODY(mmap_offset_overflow, tc) +{ + uint8_t *buf; + off_t off; + size_t len; + int fd; + + fd = open("/dev/dsp0", O_RDWR); + ATF_REQUIRE_MSG(fd >= 0, FMT_ERR("open")); + + /* off + len will overflow and wrap back to 0. */ + off = 0xfffffffffffff000; + len = 0x1000; + + buf = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, off); + ATF_REQUIRE_MSG(buf == MAP_FAILED, FMT_ERR("mmap")); + + munmap(buf, len); + + close(fd); +} + +ATF_TP_ADD_TCS(tp) +{ + ATF_TP_ADD_TC(tp, mmap_offset_overflow); + + return (atf_no_error()); +} |