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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.75.103; envelope-from=alxndr@bu.edu; helo=NAM02-BL2-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/15 09:42:14 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -8 X-Spam_score: -0.9 X-Spam_bar: / X-Spam_report: (-0.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.998, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Thomas Huth , Alexander Bulekov , f4bug@amsat.org, darren.kenny@oracle.com, bsd@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, dimastep@yandex-team.ru Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @bushare.onmicrosoft.com) Content-Type: text/plain; charset="utf-8" This new operation is used in the next commit, which concatenates two fuzzer-generated inputs. With this operation, we can prevent the second input from clobbering the PCI configuration performed by the first. Signed-off-by: Alexander Bulekov Reviewed-by: Darren Kenny --- tests/qtest/fuzz/general_fuzz.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/tests/qtest/fuzz/general_fuzz.c b/tests/qtest/fuzz/general_fuz= z.c index 0fd42a16da..11346e229a 100644 --- a/tests/qtest/fuzz/general_fuzz.c +++ b/tests/qtest/fuzz/general_fuzz.c @@ -39,6 +39,7 @@ enum cmds { OP_WRITE, OP_PCI_READ, OP_PCI_WRITE, + OP_DISABLE_PCI, OP_ADD_DMA_PATTERN, OP_CLEAR_DMA_PATTERNS, OP_CLOCK_STEP, @@ -116,6 +117,7 @@ static GArray *dma_regions; =20 static GArray *dma_patterns; static int dma_pattern_index; +static bool pci_disabled; =20 void fuzz_dma_read_cb(size_t addr, size_t len, MemoryRegion *mr, bool is_w= rite); =20 @@ -481,7 +483,7 @@ static void op_pci_read(QTestState *s, const unsigned c= har * data, size_t len) uint8_t base; uint8_t offset; } a; - if (len < sizeof(a) || fuzzable_pci_devices->len =3D=3D 0) { + if (len < sizeof(a) || fuzzable_pci_devices->len =3D=3D 0 || pci_disab= led) { return; } memcpy(&a, data, sizeof(a)); @@ -511,7 +513,7 @@ static void op_pci_write(QTestState *s, const unsigned = char * data, size_t len) uint8_t offset; uint32_t value; } a; - if (len < sizeof(a) || fuzzable_pci_devices->len =3D=3D 0) { + if (len < sizeof(a) || fuzzable_pci_devices->len =3D=3D 0 || pci_disab= led) { return; } memcpy(&a, data, sizeof(a)); @@ -566,6 +568,11 @@ static void op_clock_step(QTestState *s, const unsigne= d char *data, size_t len) qtest_clock_step_next(s); } =20 +static void op_disable_pci(QTestState *s, const unsigned char *data, size_= t len) +{ + pci_disabled =3D true; +} + static void handle_timeout(int sig) { if (qtest_log_enabled) { @@ -620,6 +627,7 @@ static void general_fuzz(QTestState *s, const unsigned = char *Data, size_t Size) [OP_WRITE] =3D op_write, [OP_PCI_READ] =3D op_pci_read, [OP_PCI_WRITE] =3D op_pci_write, + [OP_DISABLE_PCI] =3D op_disable_pci, [OP_ADD_DMA_PATTERN] =3D op_add_dma_pattern, [OP_CLEAR_DMA_PATTERNS] =3D op_clear_dma_patterns, [OP_CLOCK_STEP] =3D op_clock_step, @@ -652,6 +660,7 @@ static void general_fuzz(QTestState *s, const unsigned = char *Data, size_t Size) } =20 op_clear_dma_patterns(s, NULL, 0); + pci_disabled =3D false; =20 while (cmd && Size) { /* Get the length until the next command or end of input */ --=20 2.28.0