When parsing the dfu_alt_info, check the number of arguments and argument string strictly. If there is any garbage data (which is not able to be parsed correctly) in dfu_alt_info, that means something wrong and user may make a typo or mis- understanding about the syntax. Since the dfu_alt_info is used for updating the firmware, this mistake may lead to brick the hardware. Thus it should be checked strictly for making sure there is no mistake.
Signed-off-by: Masami Hiramatsu masami.hiramatsu@linaro.org --- drivers/dfu/dfu.c | 31 +++++++++++++++++++++------ drivers/dfu/dfu_mmc.c | 56 ++++++++++++++++++++++++++---------------------- drivers/dfu/dfu_mtd.c | 36 +++++++++++++++++++------------ drivers/dfu/dfu_nand.c | 39 ++++++++++++++++++--------------- drivers/dfu/dfu_ram.c | 25 ++++++++++----------- drivers/dfu/dfu_sf.c | 38 +++++++++++++++++---------------- drivers/dfu/dfu_virt.c | 5 +++- include/dfu.h | 33 ++++++++++++++++++---------- 8 files changed, 154 insertions(+), 109 deletions(-)
diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c index 18154774f9..516dda6179 100644 --- a/drivers/dfu/dfu.c +++ b/drivers/dfu/dfu.c @@ -500,12 +500,29 @@ int dfu_read(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num) static int dfu_fill_entity(struct dfu_entity *dfu, char *s, int alt, char *interface, char *devstr) { + char *argv[DFU_MAX_ENTITY_ARGS]; + int argc; char *st;
debug("%s: %s interface: %s dev: %s\n", __func__, s, interface, devstr); st = strsep(&s, " \t"); strlcpy(dfu->name, st, DFU_NAME_SIZE); - s = skip_spaces(s); + + /* Parse arguments */ + for (argc = 0; s && argc < DFU_MAX_ENTITY_ARGS; argc++) { + s = skip_spaces(s); + if (!*s) + break; + argv[argc] = strsep(&s, " \t"); + } + + if (argc == DFU_MAX_ENTITY_ARGS && s) { + s = skip_spaces(s); + if (*s) { + log_err("Too many arguments for %s\n", dfu->name); + return -EINVAL; + } + }
dfu->alt = alt; dfu->max_buf_size = 0; @@ -513,22 +530,22 @@ static int dfu_fill_entity(struct dfu_entity *dfu, char *s, int alt,
/* Specific for mmc device */ if (strcmp(interface, "mmc") == 0) { - if (dfu_fill_entity_mmc(dfu, devstr, s)) + if (dfu_fill_entity_mmc(dfu, devstr, argv, argc)) return -1; } else if (strcmp(interface, "mtd") == 0) { - if (dfu_fill_entity_mtd(dfu, devstr, s)) + if (dfu_fill_entity_mtd(dfu, devstr, argv, argc)) return -1; } else if (strcmp(interface, "nand") == 0) { - if (dfu_fill_entity_nand(dfu, devstr, s)) + if (dfu_fill_entity_nand(dfu, devstr, argv, argc)) return -1; } else if (strcmp(interface, "ram") == 0) { - if (dfu_fill_entity_ram(dfu, devstr, s)) + if (dfu_fill_entity_ram(dfu, devstr, argv, argc)) return -1; } else if (strcmp(interface, "sf") == 0) { - if (dfu_fill_entity_sf(dfu, devstr, s)) + if (dfu_fill_entity_sf(dfu, devstr, argv, argc)) return -1; } else if (strcmp(interface, "virt") == 0) { - if (dfu_fill_entity_virt(dfu, devstr, s)) + if (dfu_fill_entity_virt(dfu, devstr, argv, argc)) return -1; } else { printf("%s: Device %s not (yet) supported!\n", diff --git a/drivers/dfu/dfu_mmc.c b/drivers/dfu/dfu_mmc.c index d747ede66c..a91da972d4 100644 --- a/drivers/dfu/dfu_mmc.c +++ b/drivers/dfu/dfu_mmc.c @@ -337,35 +337,34 @@ void dfu_free_entity_mmc(struct dfu_entity *dfu) * 4th (optional): * mmcpart <num> (access to HW eMMC partitions) */ -int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s) +int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char **argv, int argc) { const char *entity_type; ssize_t second_arg; size_t third_arg; - struct mmc *mmc; + char *s;
- const char *argv[3]; - const char **parg = argv; - - dfu->data.mmc.dev_num = dectoul(devstr, NULL); - - for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) { - *parg = strsep(&s, " \t"); - if (*parg == NULL) { - pr_err("Invalid number of arguments.\n"); - return -ENODEV; - } - s = skip_spaces(s); + if (argc < 3) { + pr_err("The number of parameters are not enough.\n"); + return -EINVAL; }
+ dfu->data.mmc.dev_num = dectoul(devstr, &s); + if (*s) + return -EINVAL; + entity_type = argv[0]; /* * Base 0 means we'll accept (prefixed with 0x or 0) base 16, 8, * with default 10. */ - second_arg = simple_strtol(argv[1], NULL, 0); - third_arg = simple_strtoul(argv[2], NULL, 0); + second_arg = simple_strtol(argv[1], &s, 0); + if (*s) + return -EINVAL; + third_arg = simple_strtoul(argv[2], &s, 0); + if (*s) + return -EINVAL;
mmc = find_mmc_device(dfu->data.mmc.dev_num); if (mmc == NULL) { @@ -390,12 +389,14 @@ int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s) * Check for an extra entry at dfu_alt_info env variable * specifying the mmc HW defined partition number */ - if (s) - if (!strcmp(strsep(&s, " \t"), "mmcpart")) { - s = skip_spaces(s); - dfu->data.mmc.hw_partition = - simple_strtoul(s, NULL, 0); + if (argc > 3) { + if (argc != 5 || strcmp(argv[3], "mmcpart")) { + pr_err("DFU mmc raw accept 'mmcpart <partnum>' option.\n"); + return -EINVAL; } + dfu->data.mmc.hw_partition = + simple_strtoul(argv[4], NULL, 0); + }
} else if (!strcmp(entity_type, "part")) { struct disk_partition partinfo; @@ -414,15 +415,18 @@ int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s) * Check for an extra entry at dfu_alt_info env variable * specifying the mmc HW defined partition number */ - if (s) - if (!strcmp(strsep(&s, " \t"), "offset")) { - s = skip_spaces(s); - offset = simple_strtoul(s, NULL, 0); + if (argc > 3) { + if (argc != 5 || strcmp(argv[3], "offset")) { + pr_err("DFU mmc raw accept 'mmcpart <partnum>' option.\n"); + return -EINVAL; } + dfu->data.mmc.hw_partition = + simple_strtoul(argv[4], NULL, 0); + }
dfu->layout = DFU_RAW_ADDR; dfu->data.mmc.lba_start = partinfo.start + offset; - dfu->data.mmc.lba_size = partinfo.size-offset; + dfu->data.mmc.lba_size = partinfo.size - offset; dfu->data.mmc.lba_blk_size = partinfo.blksz; } else if (!strcmp(entity_type, "fat")) { dfu->layout = DFU_FS_FAT; diff --git a/drivers/dfu/dfu_mtd.c b/drivers/dfu/dfu_mtd.c index ee534a9d10..81357769ff 100644 --- a/drivers/dfu/dfu_mtd.c +++ b/drivers/dfu/dfu_mtd.c @@ -251,9 +251,9 @@ static unsigned int dfu_polltimeout_mtd(struct dfu_entity *dfu) return DFU_DEFAULT_POLL_TIMEOUT; }
-int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr, char *s) +int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr, char **argv, int argc) { - char *st; + char *s; struct mtd_info *mtd; int ret, part;
@@ -265,25 +265,33 @@ int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr, char *s) dfu->dev_type = DFU_DEV_MTD; dfu->data.mtd.info = mtd; dfu->max_buf_size = mtd->erasesize; + if (argc < 1) + return -EINVAL;
- st = strsep(&s, " \t"); - s = skip_spaces(s); - if (!strcmp(st, "raw")) { + if (!strcmp(argv[0], "raw")) { + if (argc != 3) + return -EINVAL; dfu->layout = DFU_RAW_ADDR; - dfu->data.mtd.start = hextoul(s, &s); - if (!isspace(*s)) - return -1; - s = skip_spaces(s); - dfu->data.mtd.size = hextoul(s, &s); - } else if ((!strcmp(st, "part")) || (!strcmp(st, "partubi"))) { + dfu->data.mtd.start = hextoul(argv[1], &s); + if (*s) + return -EINVAL; + dfu->data.mtd.size = hextoul(argv[2], &s); + if (*s) + return -EINVAL; + } else if ((!strcmp(argv[0], "part")) || (!strcmp(argv[0], "partubi"))) { char mtd_id[32]; struct mtd_device *mtd_dev; u8 part_num; struct part_info *pi;
+ if (argc != 2) + return -EINVAL; + dfu->layout = DFU_RAW_ADDR;
- part = dectoul(s, &s); + part = dectoul(argv[1], &s); + if (*s) + return -EINVAL;
sprintf(mtd_id, "%s,%d", devstr, part - 1); printf("using id '%s'\n", mtd_id); @@ -298,10 +306,10 @@ int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr, char *s)
dfu->data.mtd.start = pi->offset; dfu->data.mtd.size = pi->size; - if (!strcmp(st, "partubi")) + if (!strcmp(argv[0], "partubi")) dfu->data.mtd.ubi = 1; } else { - printf("%s: Memory layout (%s) not supported!\n", __func__, st); + printf("%s: Memory layout (%s) not supported!\n", __func__, argv[0]); return -1; }
diff --git a/drivers/dfu/dfu_nand.c b/drivers/dfu/dfu_nand.c index 76761939ab..08e8cf5cdb 100644 --- a/drivers/dfu/dfu_nand.c +++ b/drivers/dfu/dfu_nand.c @@ -194,23 +194,25 @@ unsigned int dfu_polltimeout_nand(struct dfu_entity *dfu) return DFU_DEFAULT_POLL_TIMEOUT; }
-int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr, char *s) +int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr, char **argv, int argc) { - char *st; + char *s; int ret, dev, part;
dfu->data.nand.ubi = 0; dfu->dev_type = DFU_DEV_NAND; - st = strsep(&s, " \t"); - s = skip_spaces(s); - if (!strcmp(st, "raw")) { + if (argc != 3) + return -EINVAL; + + if (!strcmp(argv[0], "raw")) { dfu->layout = DFU_RAW_ADDR; - dfu->data.nand.start = hextoul(s, &s); - if (!isspace(*s)) - return -1; - s = skip_spaces(s); - dfu->data.nand.size = hextoul(s, &s); - } else if ((!strcmp(st, "part")) || (!strcmp(st, "partubi"))) { + dfu->data.nand.start = hextoul(argv[1], &s); + if (*s) + return -EINVAL; + dfu->data.nand.size = hextoul(argv[2], &s); + if (*s) + return -EINVAL; + } else if ((!strcmp(argv[0], "part")) || (!strcmp(argv[0], "partubi"))) { char mtd_id[32]; struct mtd_device *mtd_dev; u8 part_num; @@ -218,11 +220,12 @@ int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr, char *s)
dfu->layout = DFU_RAW_ADDR;
- dev = dectoul(s, &s); - if (!isspace(*s)) - return -1; - s = skip_spaces(s); - part = dectoul(s, &s); + dev = dectoul(argv[1], &s); + if (*s) + return -EINVAL; + part = dectoul(argv[2], &s); + if (*s) + return -EINVAL;
sprintf(mtd_id, "%s%d,%d", "nand", dev, part - 1); debug("using id '%s'\n", mtd_id); @@ -237,10 +240,10 @@ int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr, char *s)
dfu->data.nand.start = pi->offset; dfu->data.nand.size = pi->size; - if (!strcmp(st, "partubi")) + if (!strcmp(argv[0], "partubi")) dfu->data.nand.ubi = 1; } else { - printf("%s: Memory layout (%s) not supported!\n", __func__, st); + printf("%s: Memory layout (%s) not supported!\n", __func__, argv[0]); return -1; }
diff --git a/drivers/dfu/dfu_ram.c b/drivers/dfu/dfu_ram.c index 361a3ff8af..9d10303164 100644 --- a/drivers/dfu/dfu_ram.c +++ b/drivers/dfu/dfu_ram.c @@ -54,18 +54,13 @@ static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset, return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len); }
-int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, char *s) +int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, char **argv, int argc) { - const char *argv[3]; - const char **parg = argv; - - for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) { - *parg = strsep(&s, " \t"); - if (*parg == NULL) { - pr_err("Invalid number of arguments.\n"); - return -ENODEV; - } - s = skip_spaces(s); + char *s; + + if (argc != 3) { + pr_err("Invalid number of arguments.\n"); + return -EINVAL; }
dfu->dev_type = DFU_DEV_RAM; @@ -75,8 +70,12 @@ int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, char *s) }
dfu->layout = DFU_RAM_ADDR; - dfu->data.ram.start = hextoul(argv[1], NULL); - dfu->data.ram.size = hextoul(argv[2], NULL); + dfu->data.ram.start = hextoul(argv[1], &s); + if (*s) + return -EINVAL; + dfu->data.ram.size = hextoul(argv[2], &s); + if (*s) + return -EINVAL;
dfu->write_medium = dfu_write_medium_ram; dfu->get_medium_size = dfu_get_medium_size_ram; diff --git a/drivers/dfu/dfu_sf.c b/drivers/dfu/dfu_sf.c index 993e951bc3..25a9c81850 100644 --- a/drivers/dfu/dfu_sf.c +++ b/drivers/dfu/dfu_sf.c @@ -166,9 +166,9 @@ static struct spi_flash *parse_dev(char *devstr) return dev; }
-int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char *s) +int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char **argv, int argc) { - char *st; + char *s; char *devstr_bkup = strdup(devstr);
dfu->data.sf.dev = parse_dev(devstr_bkup); @@ -179,17 +179,18 @@ int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char *s) dfu->dev_type = DFU_DEV_SF; dfu->max_buf_size = dfu->data.sf.dev->sector_size;
- st = strsep(&s, " \t"); - s = skip_spaces(s); - if (!strcmp(st, "raw")) { + if (argc != 3) + return -EINVAL; + if (!strcmp(argv[0], "raw")) { dfu->layout = DFU_RAW_ADDR; - dfu->data.sf.start = hextoul(s, &s); - if (!isspace(*s)) - return -1; - s = skip_spaces(s); - dfu->data.sf.size = hextoul(s, &s); + dfu->data.sf.start = hextoul(argv[1], &s); + if (*s) + return -EINVAL; + dfu->data.sf.size = hextoul(argv[2], &s); + if (*s) + return -EINVAL; } else if (CONFIG_IS_ENABLED(DFU_SF_PART) && - (!strcmp(st, "part") || !strcmp(st, "partubi"))) { + (!strcmp(argv[0], "part") || !strcmp(argv[0], "partubi"))) { char mtd_id[32]; struct mtd_device *mtd_dev; u8 part_num; @@ -198,11 +199,12 @@ int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char *s)
dfu->layout = DFU_RAW_ADDR;
- dev = dectoul(s, &s); - if (!isspace(*s)) - return -1; - s = skip_spaces(s); - part = dectoul(s, &s); + dev = dectoul(argv[1], &s); + if (*s) + return -EINVAL; + part = dectoul(argv[2], &s); + if (*s) + return -EINVAL;
sprintf(mtd_id, "%s%d,%d", "nor", dev, part - 1); printf("using id '%s'\n", mtd_id); @@ -216,10 +218,10 @@ int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char *s) } dfu->data.sf.start = pi->offset; dfu->data.sf.size = pi->size; - if (!strcmp(st, "partubi")) + if (!strcmp(argv[0], "partubi")) dfu->data.sf.ubi = 1; } else { - printf("%s: Memory layout (%s) not supported!\n", __func__, st); + printf("%s: Memory layout (%s) not supported!\n", __func__, argv[0]); spi_flash_free(dfu->data.sf.dev); return -1; } diff --git a/drivers/dfu/dfu_virt.c b/drivers/dfu/dfu_virt.c index 80c99cb06e..29f7a08f67 100644 --- a/drivers/dfu/dfu_virt.c +++ b/drivers/dfu/dfu_virt.c @@ -32,10 +32,13 @@ int __weak dfu_read_medium_virt(struct dfu_entity *dfu, u64 offset, return 0; }
-int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr, char *s) +int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr, char **argv, int argc) { debug("%s: devstr = %s\n", __func__, devstr);
+ if (argc != 0) + return -EINVAL; + dfu->dev_type = DFU_DEV_VIRT; dfu->layout = DFU_RAW_ADDR; dfu->data.virt.dev_num = dectoul(devstr, NULL); diff --git a/include/dfu.h b/include/dfu.h index f6868982df..dcb9cd9d79 100644 --- a/include/dfu.h +++ b/include/dfu.h @@ -432,11 +432,15 @@ static inline void dfu_set_defer_flush(struct dfu_entity *dfu) int dfu_write_from_mem_addr(struct dfu_entity *dfu, void *buf, int size);
/* Device specific */ +/* Each entity has 5 arguments in maximum. */ +#define DFU_MAX_ENTITY_ARGS 5 + #if CONFIG_IS_ENABLED(DFU_MMC) -extern int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s); +extern int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, + char **argv, int argc); #else static inline int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, - char *s) + char **argv, int argc) { puts("MMC support not available!\n"); return -1; @@ -444,10 +448,11 @@ static inline int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, #endif
#if CONFIG_IS_ENABLED(DFU_NAND) -extern int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr, char *s); +extern int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr, + char **argv, int argc); #else static inline int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr, - char *s) + char **argv, int argc) { puts("NAND support not available!\n"); return -1; @@ -455,10 +460,11 @@ static inline int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr, #endif
#if CONFIG_IS_ENABLED(DFU_RAM) -extern int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, char *s); +extern int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, + char **argv, int argc); #else static inline int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, - char *s) + char **argv, int argc) { puts("RAM support not available!\n"); return -1; @@ -466,10 +472,11 @@ static inline int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, #endif
#if CONFIG_IS_ENABLED(DFU_SF) -extern int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char *s); +extern int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, + char **argv, int argc); #else static inline int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, - char *s) + char **argv, int argc) { puts("SF support not available!\n"); return -1; @@ -477,10 +484,11 @@ static inline int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, #endif
#if CONFIG_IS_ENABLED(DFU_MTD) -int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr, char *s); +extern int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr, + char **argv, int argc); #else static inline int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr, - char *s) + char **argv, int argc) { puts("MTD support not available!\n"); return -1; @@ -488,7 +496,8 @@ static inline int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr, #endif
#ifdef CONFIG_DFU_VIRT -int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr, char *s); +int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr, + char **argv, int argc); int dfu_write_medium_virt(struct dfu_entity *dfu, u64 offset, void *buf, long *len); int dfu_get_medium_size_virt(struct dfu_entity *dfu, u64 *size); @@ -496,7 +505,7 @@ int dfu_read_medium_virt(struct dfu_entity *dfu, u64 offset, void *buf, long *len); #else static inline int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr, - char *s) + char **argv, int argc) { puts("VIRT support not available!\n"); return -1;