These fuzz targets perform a range of qtest operations over mmio and
port i/o addresses mapped to devices.
Signed-off-by: Alexander Oleinik <alx...@bu.edu>
---
tests/fuzz/qtest_fuzz.c | 261 ++++++++++++++++++++++++++++++++++++++++
tests/fuzz/qtest_fuzz.h | 38 ++++++
2 files changed, 299 insertions(+)
create mode 100644 tests/fuzz/qtest_fuzz.c
create mode 100644 tests/fuzz/qtest_fuzz.h
diff --git a/tests/fuzz/qtest_fuzz.c b/tests/fuzz/qtest_fuzz.c
new file mode 100644
index 0000000000..6d6670838d
--- /dev/null
+++ b/tests/fuzz/qtest_fuzz.c
@@ -0,0 +1,261 @@
+#include "qemu/osdep.h"
+#include "qemu/units.h"
+#include "qapi/error.h"
+#include "qemu-common.h"
+#include "exec/memory.h"
+#include "exec/address-spaces.h"
+#include "sysemu/sysemu.h"
+#include "qemu/main-loop.h"
+#include <wordexp.h>
+#include "qemu-common.h"
+#include "fuzzer_hooks.h"
+
+
+#include "fuzz.h"
+#include "qtest_fuzz.h"
+#include "tests/libqtest.h"
+#include "fuzz/qos_fuzz.h"
+
+
+/* Make sure that the io_port is mapped to some device */
+static uint16_t normalize_io_port(uint64_t addr) {
+ addr = addr%total_io_mem;
+ fuzz_memory_region *fmr = fuzz_memory_region_head;
+ while(addr!=0) {
+ if(!fmr->io){
+ fmr = fmr->next;
+ continue;
+ }
+ if(addr <= fmr->length)
+ {
+ addr= fmr->start + addr;
+ break;
+ }
+ addr -= fmr->length +1;
+ fmr = fmr->next;
+ }
+ /* Stuff that times out or hotplugs.. */
+ if(addr>=0x5655 && addr<=0x565b)
+ return 0;
+ if(addr>=0x510 && addr<=0x518)
+ return 0;
+ if(addr>=0xae00 && addr<=0xae13) // PCI Hotplug
+ return 0;
+ if(addr>=0xaf00 && addr<=0xaf1f) // CPU Hotplug
+ return 0;
+ return addr;
+}
+
+/* Make sure that the memory address is mapped to some interesting device */
+static uint16_t normalize_mem_addr(uint64_t addr) {
+ addr = addr%total_ram_mem;
+ fuzz_memory_region *fmr = fuzz_memory_region_head;
+ while(addr!=0) {
+ if(fmr->io){
+ fmr = fmr->next;
+ continue;
+ }
+ if(addr <= fmr->length)
+ {
+ return fmr->start + addr;
+ }
+ addr -= fmr->length +1;
+ fmr = fmr->next;
+ }
+ return addr;
+}
+
+static void qtest_fuzz(const unsigned char *Data, size_t Size){
+ const unsigned char *pos = Data;
+ const unsigned char *End = Data + Size;
+
+ qtest_cmd *cmd;
+
+ while(pos < Data+Size)
+ {
+ /* Translate the fuzz input to a qtest command */
+ cmd = &commands[(*pos)%(sizeof(commands)/sizeof(qtest_cmd))];
+ pos++;
+
+ if(strcmp(cmd->name, "clock_step") == 0){
+ // TODO: This times out
+ /* qtest_clock_step_next(s); */
+ }
+ else if(strcmp(cmd->name, "outb") == 0) {
+ if(pos + sizeof(uint16_t) + sizeof(uint8_t) < End) {
+ uint16_t addr = *(int16_t*)(pos);
+ pos += sizeof(uint16_t);
+ uint8_t val = *(uint16_t*)(pos);
+ pos += sizeof(uint8_t);
+ addr = normalize_io_port(addr);
+ qtest_outb(s, addr, val);
+ }
+ }
+ else if(strcmp(cmd->name, "outw") == 0) {
+ if(pos + sizeof(uint16_t) + sizeof(uint16_t) < End) {
+ uint16_t addr = *(int16_t*)(pos);
+ pos += sizeof(uint16_t);
+ uint16_t val = *(uint16_t*)(pos);
+ pos += sizeof(uint16_t);
+ addr = normalize_io_port(addr);
+ qtest_outw(s, addr, val);
+ }
+ }
+ else if(strcmp(cmd->name, "outl") == 0) {
+ if(pos + sizeof(uint16_t) + sizeof(uint32_t) < End) {
+ uint16_t addr = *(int16_t*)(pos);
+ pos += sizeof(uint16_t);
+ uint32_t val = *(uint32_t*)(pos);
+ pos += sizeof(uint32_t);
+ addr = normalize_io_port(addr);
+ qtest_outl(s, addr, val);
+ }
+ }
+ else if(strcmp(cmd->name, "inb") == 0) {
+ if(pos + sizeof(uint16_t) < End) {
+ uint16_t addr = *(int16_t*)(pos);
+ pos += sizeof(uint16_t);
+ addr = normalize_io_port(addr);
+ qtest_inb(s, addr);
+ }
+ }
+ else if(strcmp(cmd->name, "inw") == 0) {
+ if(pos + sizeof(uint16_t) < End) {
+ uint16_t addr = *(int16_t*)(pos);
+ pos += sizeof(uint16_t);
+ addr = normalize_io_port(addr);
+ qtest_inw(s, addr);
+ }
+ }
+ else if(strcmp(cmd->name, "inl") == 0) {
+ if(pos + sizeof(uint16_t) < End) {
+ uint16_t addr = *(int16_t*)(pos);
+ pos += sizeof(uint16_t);
+ addr = normalize_io_port(addr);
+ qtest_inl(s, addr);
+ }
+ }
+ else if(strcmp(cmd->name, "writeb") == 0) {
+ if(pos + sizeof(uint32_t) + sizeof(uint8_t) < End) {
+ uint32_t addr = *(int32_t*)(pos);
+ pos += sizeof(uint32_t);
+ uint8_t val = *(uint8_t*)(pos);
+ pos += sizeof(uint8_t);
+ addr = normalize_mem_addr(addr);
+ qtest_writeb(s, addr, val);
+ }
+ }
+ else if(strcmp(cmd->name, "writew") == 0) {
+ if(pos + sizeof(uint32_t) + sizeof(uint16_t) < End) {
+ uint32_t addr = *(int32_t*)(pos);
+ pos += sizeof(uint32_t);
+ uint16_t val = *(uint16_t*)(pos);
+ pos += sizeof(uint16_t);
+ addr = normalize_mem_addr(addr);
+ qtest_writew(s, addr, val);
+ }
+ }
+ else if(strcmp(cmd->name, "writel") == 0) {
+ if(pos + sizeof(uint32_t) + sizeof(uint32_t) < End) {
+ uint32_t addr = *(int32_t*)(pos);
+ pos += sizeof(uint32_t);
+ uint32_t val = *(uint32_t*)(pos);
+ pos += sizeof(uint32_t);
+ addr = normalize_mem_addr(addr);
+ qtest_writel(s, addr, val);
+ }
+ }
+ else if(strcmp(cmd->name, "readb") == 0) {
+ if(pos + sizeof(uint32_t) < End) {
+ uint32_t addr = *(int32_t*)(pos);
+ pos += sizeof(uint32_t);
+ addr = normalize_mem_addr(addr);
+ qtest_readb(s, addr);
+ }
+ }
+ else if(strcmp(cmd->name, "readw") == 0) {
+ if(pos + sizeof(uint32_t) < End) {
+ uint32_t addr = *(int32_t*)(pos);
+ pos += sizeof(uint32_t);
+ addr = normalize_mem_addr(addr);
+ qtest_readw(s, addr); } }
+ else if(strcmp(cmd->name, "readl") == 0) {
+ if(pos + sizeof(uint32_t) < End) {
+ uint32_t addr = *(int32_t*)(pos);
+ pos += sizeof(uint32_t);
+ addr = normalize_mem_addr(addr);
+ qtest_readl(s, addr);
+ }
+ }
+ else if(strcmp(cmd->name, "write_dma") == 0) {
+ if(pos + sizeof(uint32_t) + sizeof(uint16_t) < End) {
+ uint32_t addr = *(int32_t*)(pos);
+ pos += sizeof(uint32_t);
+ uint32_t val = 0x100000;
+ addr = normalize_mem_addr(addr);
+ qtest_writel(s, addr, val);
+ }
+ }
+ else if(strcmp(cmd->name, "out_dma") == 0) {
+ if(pos + sizeof(uint16_t) + sizeof(uint16_t) < End) {
+ uint16_t addr = *(int16_t*)(pos);
+ pos += sizeof(uint16_t);
+ uint32_t val = 0x100000;
+ addr = normalize_io_port(addr);
+ qtest_outl(s, addr, val);
+ }
+ }
+ main_loop_wait(false);
+ }
+}
+
+static void *net_test_setup_nosocket(GString *cmd_line, void *arg)
+{
+ g_string_append(cmd_line, " -netdev hubport,hubid=0,id=hs0 ");
+ return arg;
+}
+
+static void fuzz_fork(const unsigned char *Data, size_t Size)
+{
+ if (fork() == 0) {
+ qtest_fuzz(Data, Size);
+ counter_shm_store();
+ _Exit(0);
+ }
+ else {
+ wait(NULL);
+ counter_shm_load();
+ }
+}
+
+static void init_fork(void) {
+ qos_init_path();
+}
+static void fork_pre_main(void) {
+ qos_setup();
+ counter_shm_init();
+}
+
+int qtest_argc;
+char **qtest_argv;
+static void register_qtest_fuzz_targets(void)
+{
+ QOSGraphTestOptions opts = {
+ .before = net_test_setup_nosocket,
+ };
+ fuzz_add_qos_target("qtest-fuzz", "fuzz qtest commands and a dma buffer.
Reset device state for each run",
+ "e1000e", &opts, &qos_setup, &qos_init_path, &save_vm_state,
&load_vm_state,
+ NULL, &qtest_fuzz, NULL);
+ fuzz_add_qos_target("qtest-fork-fuzz", "fuzz qtest commands and a dma
buffer. Use COW/forking to reset state",
+ "e1000e", &opts, &fork_pre_main, NULL, &init_fork, NULL,
+ NULL, &fuzz_fork, NULL);
+
+ GString *cmd_line = g_string_new("qemu-system-i386 -display none -machine
accel=fuzz -m 3");
+ wordexp_t result;
+ wordexp (cmd_line->str, &result, 0);
+ qtest_argc = result.we_wordc;
+ qtest_argv = result.we_wordv;
+ g_string_free(cmd_line, true);
+}
+
+fuzz_target_init(register_qtest_fuzz_targets);
diff --git a/tests/fuzz/qtest_fuzz.h b/tests/fuzz/qtest_fuzz.h
new file mode 100644
index 0000000000..bf472954e7
--- /dev/null
+++ b/tests/fuzz/qtest_fuzz.h
@@ -0,0 +1,38 @@
+#ifndef _QTEST_FUZZ_H_
+#define _QTEST_FUZZ_H_
+
+typedef struct qtest_cmd {
+ char name[32];
+ uint8_t size;
+} qtest_cmd;
+
+typedef uint32_t addr_type;
+
+static qtest_cmd commands[] =
+{
+ {"clock_step", 0},
+ {"clock_step", 0},
+ {"clock_set", 1},
+ {"outb", 2},
+ {"outw", 2},
+ {"outl", 2},
+ {"inb", 1},
+ {"inw", 1},
+ {"inl", 1},
+ {"writeb", 2},
+ {"writew", 2},
+ {"writel", 2},
+ {"writeq", 2},
+ {"readb", 1},
+ {"readw", 1},
+ {"readl", 1},
+ {"readq", 1},
+ {"read", 2},
+ {"write", 3},
+ {"b64read", 2},
+ {"b64write", 10},
+ {"memset", 3},
+ {"write_dma", 2},
+ {"out_dma", 2},
+};
+#endif
--
2.20.1
