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charset="utf-8" Signed-off-by: Alexander Bulekov --- tests/qtest/fuzz/Makefile.include | 1 + tests/qtest/fuzz/general_fuzz.c | 454 ++++++++++++++++++++++++++++++ 2 files changed, 455 insertions(+) create mode 100644 tests/qtest/fuzz/general_fuzz.c diff --git a/tests/qtest/fuzz/Makefile.include b/tests/qtest/fuzz/Makefile.= include index f259d866c9..60f1a448ea 100644 --- a/tests/qtest/fuzz/Makefile.include +++ b/tests/qtest/fuzz/Makefile.include @@ -10,6 +10,7 @@ fuzz-obj-y +=3D tests/qtest/fuzz/qos_fuzz.o fuzz-obj-$(CONFIG_PCI_I440FX) +=3D tests/qtest/fuzz/i440fx_fuzz.o fuzz-obj-$(CONFIG_VIRTIO_NET) +=3D tests/qtest/fuzz/virtio_net_fuzz.o fuzz-obj-$(CONFIG_SCSI) +=3D tests/qtest/fuzz/virtio_scsi_fuzz.o +fuzz-obj-y +=3D tests/qtest/fuzz/general_fuzz.o =20 FUZZ_CFLAGS +=3D -I$(SRC_PATH)/tests -I$(SRC_PATH)/tests/qtest =20 diff --git a/tests/qtest/fuzz/general_fuzz.c b/tests/qtest/fuzz/general_fuz= z.c new file mode 100644 index 0000000000..5c29306bb6 --- /dev/null +++ b/tests/qtest/fuzz/general_fuzz.c @@ -0,0 +1,454 @@ +/* + * General Fuzzing Target + * + * Copyright Red Hat Inc., 2020 + * + * Authors: + * Alexander Bulekov + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" + +#include "cpu.h" +#include "standard-headers/linux/virtio_config.h" +#include "tests/qtest/libqtest.h" +#include "tests/qtest/libqos/virtio-net.h" +#include "fuzz.h" +#include "fork_fuzz.h" +#include "qos_fuzz.h" +#include "libqos/pci-pc.h" +#include "string.h" +#include "exec/memory.h" +#include "exec/address-spaces.h" +#include "hw/qdev-core.h" +#include "hw/pci/pci_regs.h" +#include "hw/boards.h" + +/* + * CMD_SEP is a random 32-bit value used to separate "commands" in the fuzz + * input + */ +#define CMD_SEP "\x84\x05\x5C\x5E" + +typedef struct { + size_t addr; + size_t len; /* The number of bytes until the end of the I/O region */ +} address_range; + +/* + * A pattern used to populate a DMA region or perform a memwrite. This is + * useful for e.g. populating tables of unique addresses. + * Example {.index =3D 1; .stride =3D 2; .len =3D 3; .data =3D "\x00\x01\x= 02"} + * Renders as: 00 01 02 00 03 03 00 05 03 00 07 03 ... + */ +typedef struct { + uint8_t index; /* Index of a byte to increment by stride */ + uint8_t stride; /* Increment each index'th byte by this amount */ + size_t len; + const uint8_t *data; +} pattern; + +/* + * Only fuzz an IO region if its name contains a word in region_whitelist. + * Lazy way to limit the fuzzer to a particular device. + */ +char **region_whitelist; + +/* + * Allocate a block of memory and populate it with a pattern. + */ +static void *pattern_alloc(pattern p, size_t len) +{ + int i; + uint8_t *buf =3D g_malloc(len); + uint8_t sum =3D 0; + + for (i =3D 0; i < len; ++i) { + buf[i] =3D p.data[i % p.len]; + if ((i % p.len) =3D=3D p.index) { + buf[i] +=3D sum; + sum +=3D p.stride; + } + } + return buf; +} + + +/* + * Here we want to convert a fuzzer-provided [io-region-index, offset] to + * a physical address. + */ +static address_range get_io_address(MemoryRegion *io, uint8_t index, + uint16_t offset, bool root) { + /* The index of the candidate MemoryRegions iterated in preorder */ + static int i; + MemoryRegion *child, *mr =3D NULL; + /* + * This loop should run at most twice: + * 1.) if index > num regions, to calculate num regions to calculate i= ndex + * % num_regions. + * 2.) to actually select the mr. + */ + while (!mr) { + /* If we are recursing over a subregion, don't reset i */ + if (root) { + i =3D 0; + } + QTAILQ_FOREACH(child, &io->subregions, subregions_link) { + int found =3D *region_whitelist ? 0 : 1; + char **wl_ptr =3D region_whitelist; + while (*wl_ptr !=3D NULL) { + if (strstr(child->name, *wl_ptr) !=3D NULL) { + found =3D 1; + break; + } + wl_ptr++; + } + if (found) { + if (index =3D=3D i++) { + mr =3D child; + break; + } + } + address_range addr =3D get_io_address(child, index, offset, fa= lse); + if (addr.addr !=3D -1) { + return (address_range){child->addr + addr.addr, addr.len}; + } + } + if (!mr) { + if (i =3D=3D 0 || !root) { + return (address_range){-1, 0}; + } + index =3D index % i; + } + } + if (mr->size =3D=3D 0) { + return (address_range){mr->addr, 0}; + } else { + return (address_range){mr->addr + (offset % mr->size), + mr->size - (offset % mr->size)}; + } +} + +static address_range get_pio_address(uint8_t index, uint16_t offset) +{ + return get_io_address(get_system_io(), index, offset, true); +} +static address_range get_mmio_address(uint8_t index, uint16_t offset) +{ + return get_io_address(get_system_memory(), index, offset, true); +} + +static void op_in(QTestState *s, const unsigned char * data, size_t len) +{ + enum Sizes {Byte, Word, Long, end_sizes}; + struct { + uint8_t size; + uint8_t base; + uint16_t offset; + } a; + + if (len < sizeof(a)) { + return; + } + memcpy(&a, data, sizeof(a)); + + size_t addr =3D get_pio_address(a.base, a.offset).addr; + switch (a.size %=3D end_sizes) { + case Byte: + qtest_inb(s, addr); + break; + case Word: + qtest_inw(s, addr); + break; + case Long: + qtest_inl(s, addr); + break; + } +} + +static void op_out(QTestState *s, const unsigned char * data, size_t len) +{ + enum Sizes {Byte, Word, Long, end_sizes}; + struct { + uint8_t size; + uint8_t base; + uint16_t offset; + uint32_t value; + } a; + + if (len < sizeof(a)) { + return; + } + memcpy(&a, data, sizeof(a)); + + size_t addr =3D get_pio_address(a.base, a.offset).addr; + if (addr =3D=3D -1) { + return; + } + switch (a.size %=3D end_sizes) { + case Byte: + qtest_outb(s, addr, a.value & 0xFF); + break; + case Word: + qtest_outw(s, addr, a.value & 0xFFFF); + break; + case Long: + qtest_outl(s, addr, a.value); + break; + } +} + +static void op_read(QTestState *s, const unsigned char * data, size_t len) +{ + enum Sizes {Byte, Word, Long, Quad, end_sizes}; + struct { + uint8_t size; + uint8_t base; + uint16_t offset; + } a; + + if (len < sizeof(a)) { + return; + } + memcpy(&a, data, sizeof(a)); + + size_t addr =3D get_mmio_address(a.base, a.offset).addr; + if (addr =3D=3D -1) { + return; + } + switch (a.size %=3D end_sizes) { + case Byte: + qtest_readb(s, addr); + break; + case Word: + qtest_readw(s, addr); + break; + case Long: + qtest_readl(s, addr); + break; + case Quad: + qtest_readq(s, addr); + break; + } +} + +static void op_write(QTestState *s, const unsigned char * data, size_t len) +{ + enum Sizes {Byte, Word, Long, Quad, end_sizes}; + struct { + uint8_t size; + uint8_t base; + uint16_t offset; + uint64_t value; + } a; + if (len < sizeof(a)) { + return; + } + memcpy(&a, data, sizeof(a)); + size_t addr =3D get_mmio_address(a.base, a.offset).addr; + if (addr =3D=3D -1) { + return; + } + switch (a.size %=3D end_sizes) { + case Byte: + qtest_writeb(s, addr, a.value & 0xFF); + break; + case Word: + qtest_writew(s, addr, a.value & 0xFFFF); + break; + case Long: + qtest_writel(s, addr, a.value & 0xFFFFFFFF); + break; + case Quad: + qtest_writeq(s, addr, a.value); + break; + } +} + + +static void op_write_pattern(QTestState *s, const unsigned char * data, + size_t len) +{ + struct { + uint8_t base; + uint32_t offset; + uint16_t length; + uint8_t index; + uint8_t stride; + } a; + + /* Need at least one byte for the actual pattern */ + if (len < sizeof(a) + 1) { + return; + } + + memcpy(&a, data, sizeof(a)); + pattern p =3D { + .data =3D data + sizeof(a), + .len =3D len - sizeof(a), + .index =3D a.index, + .stride =3D a.stride + }; + + address_range addr =3D get_mmio_address(a.base, a.offset); + if (addr.addr =3D=3D -1) { + return; + } + /* Cap the length and make sure it doesn't extend past the IO region. = */ + size_t write_length =3D MIN(MIN(0x1000, a.length), addr.len); + + void *buf =3D pattern_alloc(p, write_length); + qtest_memwrite(s, addr.addr, buf, write_length); + free(buf); +} + +static void op_clock_step(QTestState *s, const unsigned char *data, size_t= len) +{ + qtest_clock_step_next(s); +} + +/* + * Here, we interpret random bytes from the fuzzer, as a sequence of comma= nds. + * Our commands are variable-width, so we use a separator, CMD_SEP, to spe= cify + * the boundaries between commands. This is just a random 32-bit value, wh= ich + * is easily identified by libfuzzer+AddressSanitizer, as long as we use + * memmem. It can also be included in the fuzzer's dictionary. More details + * here: + * https://github.com/google/fuzzing/blob/master/docs/split-inputs.md + * + * As a result, the stream of bytes is converted into a sequence of comman= ds. + * In a simplified example where CMD_SEP is 0xFF: + * 00 01 02 FF 03 04 05 06 FF 01 FF ... + * becomes this sequence of commands: + * 00 01 02 -> op00 (0102) -> in (0102, 2) + * 03 04 05 06 -> op03 (040506) -> write (040506, 3) + * 01 -> op01 (-,0) -> out (-,0) + * ... + * + * Note here that it is the job of the individual opcode functions to check + * that enough data was provided. I.e. in the last command out (,0), out n= eeds + * to check that there is not enough data provided to select an address/va= lue + * for the operation. + */ +static void general_fuzz(QTestState *s, const unsigned char *Data, size_t = Size) +{ + void (*ops[]) (QTestState* s, const unsigned char* , size_t) =3D { + op_in, + op_out, + op_read, + op_write, + op_write_pattern, + op_clock_step + }; + const unsigned char *cmd =3D Data; + const unsigned char *nextcmd; + size_t cmd_len; + uint8_t op; + + if (fork() =3D=3D 0) { + while (cmd && Size) { + /* Get the length until the next command or end of input */ + nextcmd =3D memmem(cmd, Size, CMD_SEP, strlen(CMD_SEP)); + cmd_len =3D nextcmd ? nextcmd - cmd : Size; + + if (cmd_len > 0) { + /* Interpret the first byte of the command as an opcode */ + op =3D *cmd % (sizeof(ops) / sizeof((ops)[0])); + ops[op](s, cmd + 1, cmd_len - 1); + + /* Run the main loop */ + flush_events(s); + } + /* Advance to the next command */ + cmd =3D nextcmd ? nextcmd + sizeof(CMD_SEP) - 1 : nextcmd; + Size =3D Size - (cmd_len + sizeof(CMD_SEP) - 1); + } + flush_events(s); + _Exit(0); + } else { + flush_events(s); + wait(NULL); + } +} + +/* + * Adapted from tests/qtest/libqos/pci.c + */ +static void pcidev_foreach_callback(QPCIDevice *dev, int devfn, void *data) +{ + static const int bar_reg_map[] =3D { + PCI_BASE_ADDRESS_0, PCI_BASE_ADDRESS_1, PCI_BASE_ADDRESS_2, + PCI_BASE_ADDRESS_3, PCI_BASE_ADDRESS_4, PCI_BASE_ADDRESS_5, + }; + int bar_reg; + uint32_t addr; + uint32_t io_type; + + for (int i =3D 0; i < 6; i++) { + bar_reg =3D bar_reg_map[i]; + qpci_config_writel(dev, bar_reg, 0xFFFFFFFF); + addr =3D qpci_config_readl(dev, bar_reg); + + io_type =3D addr & PCI_BASE_ADDRESS_SPACE; + if (io_type =3D=3D PCI_BASE_ADDRESS_SPACE_IO) { + addr &=3D PCI_BASE_ADDRESS_IO_MASK; + } else { + addr &=3D PCI_BASE_ADDRESS_MEM_MASK; + } + if (addr) { + qpci_iomap(dev, i, NULL); + } + } + + qpci_device_enable(dev); + if (qpci_find_capability(dev, PCI_CAP_ID_MSIX, 0)) { + qpci_msix_enable(dev); + } +} + + +static void general_pre_qos_fuzz(QTestState *s) +{ + if (getenv("FUZZ_REGION_WHITELIST")) { + region_whitelist =3D g_strsplit(getenv("FUZZ_REGION_WHITELIST"), "= ", 0); + } + counter_shm_init(); + + + qos_init_path(s); + + /* Enumerate PCI devices and map BARs */ + qpci_device_foreach(fuzz_qos_obj, -1, -1, pcidev_foreach_callback, NUL= L); +} + + +static void *qos_general_cmdline(GString *cmd_line, void *arg) +{ + if (!getenv("QEMU_FUZZ_ARGS")) { + printf("Please specify qemu args for fuzzing with the QEMU_FUZZ_AR= GS" + " environment variable. " + " (e.g. QEMU_FUZZ_ARGS=3D'-device virtio-net')\n"); + exit(0); + } + g_string_append_printf(cmd_line, " %s ", getenv("QEMU_FUZZ_ARGS")); + return arg; +} + +static void register_general_fuzz_targets(void) +{ + fuzz_add_qos_target(&(FuzzTarget){ + .name =3D "general-pci-enum-fuzz", + .description =3D "Fuzz based on any qemu command-line args. " + "Try to map all PCI Device BARs. prior to fuzzi= ng", + .pre_fuzz =3D &general_pre_qos_fuzz, + .fuzz =3D general_fuzz}, + "pci-bus", + &(QOSGraphTestOptions){.before =3D qos_general_cmdline} + ); +} + +fuzz_target_init(register_general_fuzz_targets); --=20 2.26.2 From nobody Fri May 10 16:34:54 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=bu.edu) ARC-Seal: i=2; a=rsa-sha256; t=1591855145; cv=pass; d=zohomail.com; s=zohoarc; b=P5OoSDi/X0bB40S9z14fxjfWxw/D5F8IJ4va+vBBTmB5O/KRFwodGGPEhhVQwcaekdxhhFhd7UrrRRGGvIHIRshfYF8/NyUa8Rnqx7q4uSIpowo3ZXTJSFBCzeiDuJAmeME82BQA/d1KmxWG2Tpl9gLWSpGS/v9xuD7kMUK+7ls= ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1591855145; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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charset="utf-8" Signed-off-by: Alexander Bulekov --- tests/qtest/fuzz/general_fuzz.c | 102 ++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) diff --git a/tests/qtest/fuzz/general_fuzz.c b/tests/qtest/fuzz/general_fuz= z.c index 5c29306bb6..9e981e870f 100644 --- a/tests/qtest/fuzz/general_fuzz.c +++ b/tests/qtest/fuzz/general_fuzz.c @@ -32,6 +32,7 @@ * input */ #define CMD_SEP "\x84\x05\x5C\x5E" +#define MAX_DMA_FILL_SIZE 0x10000 =20 typedef struct { size_t addr; @@ -57,6 +58,18 @@ typedef struct { */ char **region_whitelist; =20 +/* + * List of dma regions populated since the last fuzzing command. Used to e= nsure + * that we only write to each DMA address once, to avoid race conditions w= hen + * building reproducers. + */ +static GArray *dma_regions; + +static GArray *dma_patterns; +int dma_pattern_index; + +void dma_read_cb(size_t addr, size_t len); + /* * Allocate a block of memory and populate it with a pattern. */ @@ -76,6 +89,62 @@ static void *pattern_alloc(pattern p, size_t len) return buf; } =20 +/* + * Call-back for functions that perform DMA reads from guest memory. Confi= rm + * that the region has not already been populated since the last loop in + * general_fuzz(), avoiding potential race-conditions, which we don't have + * a good way for reproducing right now. + */ +void dma_read_cb(size_t addr, size_t len) +{ + int i; + + /* Return immediately if we have no data to fill the dma region */ + if (dma_patterns->len =3D=3D 0) { + return; + } + + /* Return immediately if the address is greater than the RAM size */ + if (addr > current_machine->ram_size) { + return; + } + + /* Cap the length of the DMA access to something reasonable */ + len =3D MIN(len, MAX_DMA_FILL_SIZE); + + /* + * If we overlap with any existing dma_regions, split the range and on= ly + * populate the non-overlapping parts. + */ + for (i =3D 0; i < dma_regions->len; ++i) { + address_range *region =3D &g_array_index(dma_regions, address_rang= e, i); + if (addr < region->addr + region->len && addr + len > region->addr= ) { + if (addr < region->addr) { + dma_read_cb(addr, region->addr - addr); + } + if (addr + len > region->addr + region->len) { + dma_read_cb(region->addr + region->len, + addr + len - (region->addr + region->len)); + } + return; + } + } + + /* + * Otherwise, populate the region using address_space_write_rom to avo= id + * writing to any IO MemoryRegions + */ + address_range ar =3D {addr, len}; + g_array_append_val(dma_regions, ar); + void *buf =3D pattern_alloc(g_array_index(dma_patterns, pattern, + dma_pattern_index), ar.len); + address_space_write_rom(first_cpu->as, ar.addr, MEMTXATTRS_UNSPECIFIED, + buf, ar.len); + free(buf); + + /* Increment the index of the pattern for the next DMA access */ + dma_pattern_index =3D (dma_pattern_index + 1) % dma_patterns->len; +} =20 /* * Here we want to convert a fuzzer-provided [io-region-index, offset] to @@ -269,6 +338,32 @@ static void op_write(QTestState *s, const unsigned cha= r * data, size_t len) } } =20 +static void op_add_dma_pattern(QTestState *s, + const unsigned char *data, size_t len) +{ + struct { + /* + * index and stride can be used to increment the index-th byte of = the + * pattern by the value stride, for each loop of the pattern. + */ + uint8_t index; + uint8_t stride; + } a; + + if (len < sizeof(a) + 1) { + return; + } + memcpy(&a, data, sizeof(a)); + pattern p =3D {a.index, a.stride, len - sizeof(a), data + sizeof(a)}; + g_array_append_val(dma_patterns, p); + return; +} + +static void op_clear_dma_patterns(QTestState *s, + const unsigned char *data, size_t len) +{ + g_array_set_size(dma_patterns, 0); +} =20 static void op_write_pattern(QTestState *s, const unsigned char * data, size_t len) @@ -341,6 +436,8 @@ static void general_fuzz(QTestState *s, const unsigned = char *Data, size_t Size) op_out, op_read, op_write, + op_add_dma_pattern, + op_clear_dma_patterns, op_write_pattern, op_clock_step }; @@ -348,9 +445,12 @@ static void general_fuzz(QTestState *s, const unsigned= char *Data, size_t Size) const unsigned char *nextcmd; size_t cmd_len; uint8_t op; + g_array_set_size(dma_patterns, 0); + dma_pattern_index =3D 0; =20 if (fork() =3D=3D 0) { while (cmd && Size) { + g_array_set_size(dma_regions, 0); /* Get the length until the next command or end of input */ nextcmd =3D memmem(cmd, Size, CMD_SEP, strlen(CMD_SEP)); cmd_len =3D nextcmd ? nextcmd - cmd : Size; @@ -418,6 +518,8 @@ static void general_pre_qos_fuzz(QTestState *s) } counter_shm_init(); =20 + dma_regions =3D g_array_new(false, false, sizeof(address_range)); + dma_patterns =3D g_array_new(false, false, sizeof(pattern)); =20 qos_init_path(s); =20 --=20 2.26.2 From nobody Fri May 10 16:34:54 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=bu.edu) ARC-Seal: i=2; a=rsa-sha256; t=1591855253; cv=pass; d=zohomail.com; s=zohoarc; b=QjriyCUdDvojNiZauAifPDDYGP22MJGoQK5BXd24aDOOwEKo8m6BZBlpSWEFOlqaRA06os2hASQsfNwRxdHG+kvFqNezQAEcjgFxzjRzwykv/5SUGq4ZKXu7x1sjLqGGznRBNGUa1FU0UjbRNcszAHCWiCk90+8D9uFTZ3reiyc= ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1591855253; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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charset="utf-8" Signed-off-by: Alexander Bulekov --- exec.c | 17 ++++++++++++++++- include/exec/memory.h | 8 ++++++++ include/exec/memory_ldst_cached.inc.h | 9 +++++++++ include/sysemu/dma.h | 5 ++++- memory_ldst.inc.c | 12 ++++++++++++ 5 files changed, 49 insertions(+), 2 deletions(-) diff --git a/exec.c b/exec.c index be4be2df3a..2ed724ab54 100644 --- a/exec.c +++ b/exec.c @@ -3247,7 +3247,10 @@ MemTxResult address_space_read_full(AddressSpace *as= , hwaddr addr, { MemTxResult result =3D MEMTX_OK; FlatView *fv; - +#ifdef CONFIG_FUZZ + if(as->root =3D=3D get_system_memory()) + dma_read_cb(addr, len); +#endif if (len > 0) { RCU_READ_LOCK_GUARD(); fv =3D address_space_to_flatview(as); @@ -3556,6 +3559,10 @@ void *address_space_map(AddressSpace *as, } =20 *plen =3D l; +#ifdef CONFIG_FUZZ + if(as->root =3D=3D get_system_memory() && !is_write) + dma_read_cb(addr, *plen); +#endif return bounce.buffer; } =20 @@ -3563,6 +3570,10 @@ void *address_space_map(AddressSpace *as, memory_region_ref(mr); *plen =3D flatview_extend_translation(fv, addr, len, mr, xlat, l, is_write, attrs); +#ifdef CONFIG_FUZZ + if(as->root =3D=3D get_system_memory() && !is_write) + dma_read_cb(addr, *plen); +#endif ptr =3D qemu_ram_ptr_length(mr->ram_block, xlat, plen, true); =20 return ptr; @@ -3635,6 +3646,10 @@ int64_t address_space_cache_init(MemoryRegionCache *= cache, =20 assert(len > 0); =20 +#ifdef CONFIG_FUZZ + if(as->root =3D=3D get_system_memory() && !is_write) + dma_read_cb(addr, len); +#endif l =3D len; cache->fv =3D address_space_get_flatview(as); d =3D flatview_to_dispatch(cache->fv); diff --git a/include/exec/memory.h b/include/exec/memory.h index 3e00cdbbfa..e9178b3e0a 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -49,6 +49,10 @@ =20 extern bool global_dirty_log; =20 +#ifdef CONFIG_FUZZ +extern void dma_read_cb(size_t addr, size_t len); +#endif + typedef struct MemoryRegionOps MemoryRegionOps; typedef struct MemoryRegionMmio MemoryRegionMmio; =20 @@ -2427,6 +2431,10 @@ address_space_read_cached(MemoryRegionCache *cache, = hwaddr addr, void *buf, hwaddr len) { assert(addr < cache->len && len <=3D cache->len - addr); + +#ifdef CONFIG_FUZZ + dma_read_cb(addr, len); +#endif if (likely(cache->ptr)) { memcpy(buf, cache->ptr + addr, len); } else { diff --git a/include/exec/memory_ldst_cached.inc.h b/include/exec/memory_ld= st_cached.inc.h index fd4bbb40e7..dc3ce14a97 100644 --- a/include/exec/memory_ldst_cached.inc.h +++ b/include/exec/memory_ldst_cached.inc.h @@ -28,6 +28,9 @@ static inline uint32_t ADDRESS_SPACE_LD_CACHED(l)(MemoryR= egionCache *cache, hwaddr addr, MemTxAttrs attrs, MemTxResult *result) { assert(addr < cache->len && 4 <=3D cache->len - addr); +#ifdef CONFIG_FUZZ + dma_read_cb(cache->xlat + addr, 4); +#endif if (likely(cache->ptr)) { return LD_P(l)(cache->ptr + addr); } else { @@ -39,6 +42,9 @@ static inline uint64_t ADDRESS_SPACE_LD_CACHED(q)(MemoryR= egionCache *cache, hwaddr addr, MemTxAttrs attrs, MemTxResult *result) { assert(addr < cache->len && 8 <=3D cache->len - addr); +#ifdef CONFIG_FUZZ + dma_read_cb(cache->xlat + addr, 8); +#endif if (likely(cache->ptr)) { return LD_P(q)(cache->ptr + addr); } else { @@ -50,6 +56,9 @@ static inline uint32_t ADDRESS_SPACE_LD_CACHED(uw)(Memory= RegionCache *cache, hwaddr addr, MemTxAttrs attrs, MemTxResult *result) { assert(addr < cache->len && 2 <=3D cache->len - addr); +#ifdef CONFIG_FUZZ + dma_read_cb(cache->xlat + addr, 2); +#endif if (likely(cache->ptr)) { return LD_P(uw)(cache->ptr + addr); } else { diff --git a/include/sysemu/dma.h b/include/sysemu/dma.h index 80c5bc3e02..f32d7db7aa 100644 --- a/include/sysemu/dma.h +++ b/include/sysemu/dma.h @@ -105,8 +105,11 @@ static inline int dma_memory_rw(AddressSpace *as, dma_= addr_t addr, void *buf, dma_addr_t len, DMADirection dir) { +#ifdef CONFIG_FUZZ + if (dir =3D=3D DMA_DIRECTION_TO_DEVICE) + dma_read_cb(addr, len); +#endif dma_barrier(as, dir); - return dma_memory_rw_relaxed(as, addr, buf, len, dir); } =20 diff --git a/memory_ldst.inc.c b/memory_ldst.inc.c index c54aee4a95..1935436aff 100644 --- a/memory_ldst.inc.c +++ b/memory_ldst.inc.c @@ -42,6 +42,9 @@ static inline uint32_t glue(address_space_ldl_internal, S= UFFIX)(ARG1_DECL, MO_32 | devend_memop(endian), attr= s); } else { /* RAM case */ +#ifdef CONFIG_FUZZ + dma_read_cb(addr, 4); +#endif ptr =3D qemu_map_ram_ptr(mr->ram_block, addr1); switch (endian) { case DEVICE_LITTLE_ENDIAN: @@ -110,6 +113,9 @@ static inline uint64_t glue(address_space_ldq_internal,= SUFFIX)(ARG1_DECL, MO_64 | devend_memop(endian), attr= s); } else { /* RAM case */ +#ifdef CONFIG_FUZZ + dma_read_cb(addr, 8); +#endif ptr =3D qemu_map_ram_ptr(mr->ram_block, addr1); switch (endian) { case DEVICE_LITTLE_ENDIAN: @@ -175,6 +181,9 @@ uint32_t glue(address_space_ldub, SUFFIX)(ARG1_DECL, r =3D memory_region_dispatch_read(mr, addr1, &val, MO_8, attrs); } else { /* RAM case */ +#ifdef CONFIG_FUZZ + dma_read_cb(addr, 1); +#endif ptr =3D qemu_map_ram_ptr(mr->ram_block, addr1); val =3D ldub_p(ptr); r =3D MEMTX_OK; @@ -212,6 +221,9 @@ static inline uint32_t glue(address_space_lduw_internal= , SUFFIX)(ARG1_DECL, MO_16 | devend_memop(endian), attr= s); } else { /* RAM case */ +#ifdef CONFIG_FUZZ + dma_read_cb(addr, 2); +#endif ptr =3D qemu_map_ram_ptr(mr->ram_block, addr1); switch (endian) { case DEVICE_LITTLE_ENDIAN: --=20 2.26.2