From: Alexander Bulekov <alxndr@bu.edu>
To: qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
Darren Kenny <darren.kenny@oracle.com>,
Alexander Bulekov <alxndr@bu.edu>
Subject: [PULL 7/7] fuzz: add virtio-9p configurations for fuzzing
Date: Wed, 20 Jan 2021 12:44:56 -0500 [thread overview]
Message-ID: <20210120174456.275312-8-alxndr@bu.edu> (raw)
In-Reply-To: <20210120174456.275312-1-alxndr@bu.edu>
virtio-9p devices are often used to expose a virtual-filesystem to the
guest. There have been some bugs reported in this device, such as
CVE-2018-19364, and CVE-2021-20181. We should fuzz this device
This patch adds two virtio-9p configurations:
* One with the widely used -fsdev local driver. This driver leaks some
state in the form of files/directories created in the shared dir.
* One with the synth driver. While it is not used in the real world, this
driver won't leak leak state between fuzz inputs.
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
---
tests/qtest/fuzz/generic_fuzz_configs.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/tests/qtest/fuzz/generic_fuzz_configs.h b/tests/qtest/fuzz/generic_fuzz_configs.h
index 51e69c6e42..5d599765c4 100644
--- a/tests/qtest/fuzz/generic_fuzz_configs.h
+++ b/tests/qtest/fuzz/generic_fuzz_configs.h
@@ -19,6 +19,16 @@ typedef struct generic_fuzz_config {
gchar* (*argfunc)(void); /* Result must be freeable by g_free() */
} generic_fuzz_config;
+static inline gchar *generic_fuzzer_virtio_9p_args(void){
+ char tmpdir[] = "/tmp/qemu-fuzz.XXXXXX";
+ g_assert_nonnull(mkdtemp(tmpdir));
+
+ return g_strdup_printf("-machine q35 -nodefaults "
+ "-device virtio-9p,fsdev=hshare,mount_tag=hshare "
+ "-fsdev local,id=hshare,path=%s,security_model=mapped-xattr,"
+ "writeout=immediate,fmode=0600,dmode=0700", tmpdir);
+}
+
const generic_fuzz_config predefined_configs[] = {
{
.name = "virtio-net-pci-slirp",
@@ -60,6 +70,16 @@ const generic_fuzz_config predefined_configs[] = {
.name = "virtio-mouse",
.args = "-machine q35 -nodefaults -device virtio-mouse",
.objects = "virtio*",
+ },{
+ .name = "virtio-9p",
+ .argfunc = generic_fuzzer_virtio_9p_args,
+ .objects = "virtio*",
+ },{
+ .name = "virtio-9p-synth",
+ .args = "-machine q35 -nodefaults "
+ "-device virtio-9p,fsdev=hshare,mount_tag=hshare "
+ "-fsdev synth,id=hshare",
+ .objects = "virtio*",
},{
.name = "e1000",
.args = "-M q35 -nodefaults "
--
2.28.0
next prev parent reply other threads:[~2021-01-20 18:06 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 17:44 [PULL 0/7] 2021-01-20 fuzzing patches Alexander Bulekov
2021-01-20 17:44 ` [PULL 1/7] fuzz: ignore address_space_map is_write flag Alexander Bulekov
2021-01-20 17:44 ` [PULL 2/7] fuzz: refine the ide/ahci fuzzer configs Alexander Bulekov
2021-01-20 17:44 ` [PULL 3/7] docs/fuzz: fix pre-meson path Alexander Bulekov
2021-01-20 17:44 ` [PULL 4/7] fuzz: log the arguments used to initialize QEMU Alexander Bulekov
2021-01-20 17:44 ` [PULL 5/7] fuzz: enable dynamic args for generic-fuzz configs Alexander Bulekov
2021-01-20 17:44 ` [PULL 6/7] docs/fuzz: add some information about OSS-Fuzz Alexander Bulekov
2021-01-20 17:44 ` Alexander Bulekov [this message]
2021-01-22 15:06 ` [PULL 0/7] 2021-01-20 fuzzing patches Peter Maydell
2021-01-25 19:09 ` Alexander Bulekov
-- strict thread matches above, loose matches on Subject: below --
2021-01-20 17:35 Alexander Bulekov
2021-01-20 17:35 ` [PULL 7/7] fuzz: add virtio-9p configurations for fuzzing Alexander Bulekov
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