Hello Andy, in the code of your patch "mpc85xx: Add support for the Varisys Cyrus board" merged in 2015 as 87e29878cab an out of bound access occurs. See below.
On 11/4/15 10:48 PM, Andy Fleming wrote:
This board runs a P5020 or P5040 chip, and utilizes an EEPROM with similar formatting to the Freescale P5020DS. Large amounts of this code were developed by Adrian Cox <adrian at humboldt dot co dot uk> Signed-off-by: Andy Fleming <aflem...@gmail.com> Reviewed-by: York Sun <york...@freescale.com> ---
<snip /> > +++ b/board/varisys/common/sys_eeprom.c <snip /> > +static struct __attribute__ ((__packed__)) eeprom { > + u8 id[4]; /* 0x00 - 0x03 EEPROM Tag 'NXID' */ > + u8 sn[12]; /* 0x04 - 0x0F Serial Number */ > + u8 errata[5]; /* 0x10 - 0x14 Errata Level */ > + u8 date[6]; /* 0x15 - 0x1a Build Date */ > + u8 res_0; /* 0x1b Reserved */ > + u32 version; /* 0x1c - 0x1f NXID Version */ > + u8 tempcal[8]; /* 0x20 - 0x27 Temperature Calibration Factors */ > + u8 tempcalsys[2]; /* 0x28 - 0x29 System Temperature Calibration Factors */ > + u8 tempcalflags; /* 0x2a Temperature Calibration Flags */ > + u8 res_1[21]; /* 0x2b - 0x3f Reserved */ > + u8 mac_count; /* 0x40 Number of MAC addresses */ > + u8 mac_flag; /* 0x41 MAC table flags */ > + u8 mac[MAX_NUM_PORTS][6]; /* 0x42 - x MAC addresses */ > + u32 crc; /* x+1 CRC32 checksum */ > +} e; <snip /> // MAX_NUM_PORTS = 8
+int mac_read_from_eeprom_common(void) +{ + unsigned int i; + u32 crc, crc_offset = offsetof(struct eeprom, crc); + u32 *crcp; /* Pointer to the CRC in the data read from the EEPROM */ + + puts("EEPROM: "); + + if (read_eeprom()) { + printf("Read failed.\n"); + return 0; + } + + if (!is_valid) { + printf("Invalid ID (%02x %02x %02x %02x)\n", + e.id[0], e.id[1], e.id[2], e.id[3]); + return 0; + } + + crc = crc32(0, (void *)&e, crc_offset); + crcp = (void *)&e + crc_offset; + if (crc != be32_to_cpu(*crcp)) { + printf("CRC mismatch (%08x != %08x)\n", crc, + be32_to_cpu(e.crc)); + return 0; + } + + /* + * MAC address #9 in v1 occupies the same position as the CRC in v0. + * Erase it so that it's not mistaken for a MAC address. We'll + * update the CRC later. + */ + if (e.version == 0) + memset(e.mac[8], 0xff, 6);
Here you are writing 2 bytes beyond the size of e. Best regards Heinrich