OSS-Fuzz found sending illegal addresses when querying the write
protection bits triggers an assertion:
qemu-fuzz-i386: hw/sd/sd.c:824: uint32_t sd_wpbits(SDState *, uint64_t): Assertion `wpnum < sd->wpgrps_size' failed.
==11578== ERROR: libFuzzer: deadly signal
#8 0x7ffff628e091 in __assert_fail
#9 0x5555588f1a3c in sd_wpbits hw/sd/sd.c:824:9
#10 0x5555588dd271 in sd_normal_command hw/sd/sd.c:1383:38
#11 0x5555588d777c in sd_do_command hw/sd/sd.c
#12 0x555558cb25a0 in sdbus_do_command hw/sd/core.c💯16
#13 0x555558e02a9a in sdhci_send_command hw/sd/sdhci.c:337:12
#14 0x555558dffa46 in sdhci_write hw/sd/sdhci.c:1187:9
#15 0x5555598b9d76 in memory_region_write_accessor softmmu/memory.c:489:5
Similarly to commit 8573378e62
("hw/sd: fix out-of-bounds check
for multi block reads"), check the address range before sending
the status of the write protection bits.
Include the qtest reproducer provided by Alexander Bulekov:
$ make check-qtest-i386
...
Running test qtest-i386/fuzz-sdcard-test
qemu-system-i386: ../hw/sd/sd.c:824: sd_wpbits: Assertion `wpnum < sd->wpgrps_size' failed.
Reported-by: OSS-Fuzz (Issue 29225)
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/450
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
Message-Id: <20210702155900.148665-4-f4bug@amsat.org>
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/*
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* QTest fuzzer-generated testcase for sdcard 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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* https://gitlab.com/qemu-project/qemu/-/issues/450
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* Used to trigger:
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* Assertion `wpnum < sd->wpgrps_size' failed.
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*/
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static void oss_fuzz_29225(void)
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{
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QTestState *s;
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s = qtest_init(" -display none -m 512m -nodefaults -nographic"
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" -device sdhci-pci,sd-spec-version=3"
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" -device sd-card,drive=d0"
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" -drive if=none,index=0,file=null-co://,format=raw,id=d0");
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qtest_outl(s, 0xcf8, 0x80001010);
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qtest_outl(s, 0xcfc, 0xd0690);
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qtest_outl(s, 0xcf8, 0x80001003);
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qtest_outl(s, 0xcf8, 0x80001013);
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qtest_outl(s, 0xcfc, 0xffffffff);
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qtest_outl(s, 0xcf8, 0x80001003);
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qtest_outl(s, 0xcfc, 0x3effe00);
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qtest_bufwrite(s, 0xff0d062c, "\xff", 0x1);
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qtest_bufwrite(s, 0xff0d060f, "\xb7", 0x1);
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qtest_bufwrite(s, 0xff0d060a, "\xc9", 0x1);
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qtest_bufwrite(s, 0xff0d060f, "\x29", 0x1);
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qtest_bufwrite(s, 0xff0d060f, "\xc2", 0x1);
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qtest_bufwrite(s, 0xff0d0628, "\xf7", 0x1);
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qtest_bufwrite(s, 0x0, "\xe3", 0x1);
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qtest_bufwrite(s, 0x7, "\x13", 0x1);
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qtest_bufwrite(s, 0x8, "\xe3", 0x1);
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qtest_bufwrite(s, 0xf, "\xe3", 0x1);
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qtest_bufwrite(s, 0xff0d060f, "\x03", 0x1);
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qtest_bufwrite(s, 0xff0d0605, "\x01", 0x1);
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qtest_bufwrite(s, 0xff0d060b, "\xff", 0x1);
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qtest_bufwrite(s, 0xff0d060c, "\xff", 0x1);
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qtest_bufwrite(s, 0xff0d060e, "\xff", 0x1);
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qtest_bufwrite(s, 0xff0d060f, "\x06", 0x1);
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qtest_bufwrite(s, 0xff0d060f, "\x9e", 0x1);
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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/sdcard/oss_fuzz_29225", oss_fuzz_29225);
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}
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return g_test_run();
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}
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