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60e543f5ce
The I/O sampling rate range is enforced to 5000 to 45000HZ according to commita2cd86a9. Setting I/O sampling rate with command 41h/42h, a guest user can break this assumption and trigger an assertion in audio_calloc via command 0xd4. This patch restricts the I/O sampling rate range for command 41h/42h. Fixes:85571bc741("audio merge (malc)") Signed-off-by: Qiang Liu <cyruscyliu@gmail.com> Message-Id: <1624502687-5214-1-git-send-email-cyruscyliu@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/*
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* QTest fuzzer-generated testcase for sb16 audio device
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*
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* Copyright (c) 2021 Philippe Mathieu-Daudé <f4bug@amsat.org>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "qemu/osdep.h"
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#include "libqos/libqtest.h"
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/*
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* This used to trigger the assert in audio_calloc
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* https://bugs.launchpad.net/qemu/+bug/1910603
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*/
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static void test_fuzz_sb16_0x1c(void)
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{
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QTestState *s = qtest_init("-M q35 -display none "
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"-device sb16,audiodev=snd0 "
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"-audiodev none,id=snd0");
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qtest_outw(s, 0x22c, 0x41);
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qtest_outb(s, 0x22c, 0x00);
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qtest_outw(s, 0x22c, 0x1004);
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qtest_outw(s, 0x22c, 0x001c);
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qtest_quit(s);
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}
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static void test_fuzz_sb16_0x91(void)
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{
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QTestState *s = qtest_init("-M pc -display none "
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"-device sb16,audiodev=none "
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"-audiodev id=none,driver=none");
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qtest_outw(s, 0x22c, 0xf141);
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qtest_outb(s, 0x22c, 0x00);
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qtest_outb(s, 0x22c, 0x24);
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qtest_outb(s, 0x22c, 0x91);
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qtest_quit(s);
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}
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/*
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* This used to trigger the assert in audio_calloc
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* through command 0xd4
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*/
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static void test_fuzz_sb16_0xd4(void)
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{
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QTestState *s = qtest_init("-M pc -display none "
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"-device sb16,audiodev=none "
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"-audiodev id=none,driver=none");
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qtest_outb(s, 0x22c, 0x41);
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qtest_outb(s, 0x22c, 0x00);
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qtest_outb(s, 0x22c, 0x14);
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qtest_outb(s, 0x22c, 0xd4);
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qtest_quit(s);
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}
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int main(int argc, char **argv)
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{
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const char *arch = qtest_get_arch();
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g_test_init(&argc, &argv, NULL);
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if (strcmp(arch, "i386") == 0) {
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qtest_add_func("fuzz/test_fuzz_sb16/1c", test_fuzz_sb16_0x1c);
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qtest_add_func("fuzz/test_fuzz_sb16/91", test_fuzz_sb16_0x91);
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qtest_add_func("fuzz/test_fuzz_sb16/d4", test_fuzz_sb16_0xd4);
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}
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return g_test_run();
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}
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