From: Kevin Wolf <kwolf@redhat.com>
To: qemu-block@nongnu.org
Cc: kwolf@redhat.com, qemu-devel@nongnu.org
Subject: [PULL 07/10] tests/qtest/fdc-test: Add a regression test for CVE-2021-3507
Date: Thu, 12 May 2022 17:33:58 +0200 [thread overview]
Message-ID: <20220512153401.202863-8-kwolf@redhat.com> (raw)
In-Reply-To: <20220512153401.202863-1-kwolf@redhat.com>
From: Philippe Mathieu-Daudé <philmd@redhat.com>
Add the reproducer from https://gitlab.com/qemu-project/qemu/-/issues/339
Without the previous commit, when running 'make check-qtest-i386'
with QEMU configured with '--enable-sanitizers' we get:
==4028352==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x619000062a00 at pc 0x5626d03c491a bp 0x7ffdb4199410 sp 0x7ffdb4198bc0
READ of size 786432 at 0x619000062a00 thread T0
#0 0x5626d03c4919 in __asan_memcpy (qemu-system-i386+0x1e65919)
#1 0x5626d1c023cc in flatview_write_continue softmmu/physmem.c:2787:13
#2 0x5626d1bf0c0f in flatview_write softmmu/physmem.c:2822:14
#3 0x5626d1bf0798 in address_space_write softmmu/physmem.c:2914:18
#4 0x5626d1bf0f37 in address_space_rw softmmu/physmem.c:2924:16
#5 0x5626d1bf14c8 in cpu_physical_memory_rw softmmu/physmem.c:2933:5
#6 0x5626d0bd5649 in cpu_physical_memory_write include/exec/cpu-common.h:82:5
#7 0x5626d0bd0a07 in i8257_dma_write_memory hw/dma/i8257.c:452:9
#8 0x5626d09f825d in fdctrl_transfer_handler hw/block/fdc.c:1616:13
#9 0x5626d0a048b4 in fdctrl_start_transfer hw/block/fdc.c:1539:13
#10 0x5626d09f4c3e in fdctrl_write_data hw/block/fdc.c:2266:13
#11 0x5626d09f22f7 in fdctrl_write hw/block/fdc.c:829:9
#12 0x5626d1c20bc5 in portio_write softmmu/ioport.c:207:17
0x619000062a00 is located 0 bytes to the right of 512-byte region [0x619000062800,0x619000062a00)
allocated by thread T0 here:
#0 0x5626d03c66ec in posix_memalign (qemu-system-i386+0x1e676ec)
#1 0x5626d2b988d4 in qemu_try_memalign util/oslib-posix.c:210:11
#2 0x5626d2b98b0c in qemu_memalign util/oslib-posix.c:226:27
#3 0x5626d09fbaf0 in fdctrl_realize_common hw/block/fdc.c:2341:20
#4 0x5626d0a150ed in isabus_fdc_realize hw/block/fdc-isa.c:113:5
#5 0x5626d2367935 in device_set_realized hw/core/qdev.c:531:13
SUMMARY: AddressSanitizer: heap-buffer-overflow (qemu-system-i386+0x1e65919) in __asan_memcpy
Shadow bytes around the buggy address:
0x0c32800044f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3280004500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3280004510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3280004520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3280004530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c3280004540:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3280004550: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3280004560: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3280004570: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3280004580: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3280004590: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Heap left redzone: fa
Freed heap region: fd
==4028352==ABORTING
[ kwolf: Added snapshot=on to prevent write file lock failure ]
Reported-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
tests/qtest/fdc-test.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/tests/qtest/fdc-test.c b/tests/qtest/fdc-test.c
index 0b3c2c0d52..52ade90a7d 100644
--- a/tests/qtest/fdc-test.c
+++ b/tests/qtest/fdc-test.c
@@ -582,6 +582,26 @@ static void test_cve_2021_20196(void)
qtest_quit(s);
}
+static void test_cve_2021_3507(void)
+{
+ QTestState *s;
+
+ s = qtest_initf("-nographic -m 32M -nodefaults "
+ "-drive file=%s,format=raw,if=floppy,snapshot=on",
+ test_image);
+ qtest_outl(s, 0x9, 0x0a0206);
+ qtest_outw(s, 0x3f4, 0x1600);
+ qtest_outw(s, 0x3f4, 0x0000);
+ qtest_outw(s, 0x3f4, 0x0000);
+ qtest_outw(s, 0x3f4, 0x0000);
+ qtest_outw(s, 0x3f4, 0x0200);
+ qtest_outw(s, 0x3f4, 0x0200);
+ qtest_outw(s, 0x3f4, 0x0000);
+ qtest_outw(s, 0x3f4, 0x0000);
+ qtest_outw(s, 0x3f4, 0x0000);
+ qtest_quit(s);
+}
+
int main(int argc, char **argv)
{
int fd;
@@ -613,6 +633,7 @@ int main(int argc, char **argv)
qtest_add_func("/fdc/read_no_dma_19", test_read_no_dma_19);
qtest_add_func("/fdc/fuzz-registers", fuzz_registers);
qtest_add_func("/fdc/fuzz/cve_2021_20196", test_cve_2021_20196);
+ qtest_add_func("/fdc/fuzz/cve_2021_3507", test_cve_2021_3507);
ret = g_test_run();
--
2.35.3
next prev parent reply other threads:[~2022-05-12 15:37 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-12 15:33 [PULL 00/10] Block layer patches Kevin Wolf
2022-05-12 15:33 ` [PULL 01/10] coroutine: Rename qemu_coroutine_inc/dec_pool_size() Kevin Wolf
2022-05-12 15:33 ` [PULL 02/10] coroutine: Revert to constant batch size Kevin Wolf
2022-05-12 15:33 ` [PULL 03/10] iotests/testrunner: Flush after run_test() Kevin Wolf
2022-05-12 15:33 ` [PULL 04/10] tests/qemu-iotests: print intent to run a test in TAP mode Kevin Wolf
2022-05-12 15:33 ` [PULL 05/10] .gitlab-ci.d: export meson testlog.txt as an artifact Kevin Wolf
2022-05-12 15:33 ` [PULL 06/10] hw/block/fdc: Prevent end-of-track overrun (CVE-2021-3507) Kevin Wolf
2022-05-12 15:33 ` Kevin Wolf [this message]
2022-05-12 15:33 ` [PULL 08/10] qemu-nbd: Pass max connections to blockdev layer Kevin Wolf
2022-05-12 15:34 ` [PULL 09/10] nbd/server: Allow MULTI_CONN for shared writable exports Kevin Wolf
2022-05-12 15:34 ` [PULL 10/10] qemu-iotests: inline common.config into common.rc Kevin Wolf
2022-05-12 17:02 ` [PULL 00/10] Block layer patches Richard Henderson
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