diff options
Diffstat (limited to 'contrib/file/src/readelf.c')
| -rw-r--r-- | contrib/file/src/readelf.c | 529 |
1 files changed, 324 insertions, 205 deletions
diff --git a/contrib/file/src/readelf.c b/contrib/file/src/readelf.c index ede7e0c751c8..d159620cec85 100644 --- a/contrib/file/src/readelf.c +++ b/contrib/file/src/readelf.c @@ -27,7 +27,7 @@ #include "file.h" #ifndef lint -FILE_RCSID("@(#)$File: readelf.c,v 1.103 2014/05/02 02:25:10 christos Exp $") +FILE_RCSID("@(#)$File: readelf.c,v 1.117 2014/12/16 23:29:42 christos Exp $") #endif #ifdef BUILTIN_ELF @@ -43,14 +43,14 @@ FILE_RCSID("@(#)$File: readelf.c,v 1.103 2014/05/02 02:25:10 christos Exp $") #ifdef ELFCORE private int dophn_core(struct magic_set *, int, int, int, off_t, int, size_t, - off_t, int *); + off_t, int *, uint16_t *); #endif private int dophn_exec(struct magic_set *, int, int, int, off_t, int, size_t, - off_t, int *, int); + off_t, int, int *, uint16_t *); private int doshn(struct magic_set *, int, int, int, off_t, int, size_t, - off_t, int *, int, int); + off_t, int, int, int *, uint16_t *); private size_t donote(struct magic_set *, void *, size_t, size_t, int, - int, size_t, int *); + int, size_t, int *, uint16_t *); #define ELF_ALIGN(a) ((((a) + align - 1) / align) * align) @@ -60,6 +60,19 @@ private uint16_t getu16(int, uint16_t); private uint32_t getu32(int, uint32_t); private uint64_t getu64(int, uint64_t); +#define MAX_PHNUM 128 +#define MAX_SHNUM 32768 +#define SIZE_UNKNOWN ((off_t)-1) + +private int +toomany(struct magic_set *ms, const char *name, uint16_t num) +{ + if (file_printf(ms, ", too many %s (%u)", name, num + ) == -1) + return -1; + return 0; +} + private uint16_t getu16(int swap, uint16_t value) { @@ -280,15 +293,19 @@ private const char os_style_names[][8] = { "NetBSD", }; -#define FLAGS_DID_CORE 0x01 -#define FLAGS_DID_NOTE 0x02 -#define FLAGS_DID_BUILD_ID 0x04 -#define FLAGS_DID_CORE_STYLE 0x08 -#define FLAGS_IS_CORE 0x10 +#define FLAGS_DID_CORE 0x001 +#define FLAGS_DID_OS_NOTE 0x002 +#define FLAGS_DID_BUILD_ID 0x004 +#define FLAGS_DID_CORE_STYLE 0x008 +#define FLAGS_DID_NETBSD_PAX 0x010 +#define FLAGS_DID_NETBSD_MARCH 0x020 +#define FLAGS_DID_NETBSD_CMODEL 0x040 +#define FLAGS_DID_NETBSD_UNKNOWN 0x080 +#define FLAGS_IS_CORE 0x100 private int dophn_core(struct magic_set *ms, int clazz, int swap, int fd, off_t off, - int num, size_t size, off_t fsize, int *flags) + int num, size_t size, off_t fsize, int *flags, uint16_t *notecount) { Elf32_Phdr ph32; Elf64_Phdr ph64; @@ -306,13 +323,13 @@ dophn_core(struct magic_set *ms, int clazz, int swap, int fd, off_t off, * Loop through all the program headers. */ for ( ; num; num--) { - if (pread(fd, xph_addr, xph_sizeof, off) == -1) { + if (pread(fd, xph_addr, xph_sizeof, off) < (ssize_t)xph_sizeof) { file_badread(ms); return -1; } off += size; - if (xph_offset > fsize) { + if (fsize != SIZE_UNKNOWN && xph_offset > fsize) { /* Perhaps warn here */ continue; } @@ -334,7 +351,7 @@ dophn_core(struct magic_set *ms, int clazz, int swap, int fd, off_t off, if (offset >= (size_t)bufsize) break; offset = donote(ms, nbuf, offset, (size_t)bufsize, - clazz, swap, 4, flags); + clazz, swap, 4, flags, notecount); if (offset == 0) break; @@ -464,125 +481,127 @@ do_note_freebsd_version(struct magic_set *ms, int swap, void *v) } } -private size_t -donote(struct magic_set *ms, void *vbuf, size_t offset, size_t size, - int clazz, int swap, size_t align, int *flags) +private int +do_bid_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type, + int swap __attribute__((__unused__)), uint32_t namesz, uint32_t descsz, + size_t noff, size_t doff, int *flags) { - Elf32_Nhdr nh32; - Elf64_Nhdr nh64; - size_t noff, doff; -#ifdef ELFCORE - int os_style = -1; -#endif - uint32_t namesz, descsz; - unsigned char *nbuf = CAST(unsigned char *, vbuf); - - (void)memcpy(xnh_addr, &nbuf[offset], xnh_sizeof); - offset += xnh_sizeof; - - namesz = xnh_namesz; - descsz = xnh_descsz; - if ((namesz == 0) && (descsz == 0)) { - /* - * We're out of note headers. - */ - return (offset >= size) ? offset : size; - } - - if (namesz & 0x80000000) { - (void)file_printf(ms, ", bad note name size 0x%lx", - (unsigned long)namesz); - return offset; - } - - if (descsz & 0x80000000) { - (void)file_printf(ms, ", bad note description size 0x%lx", - (unsigned long)descsz); - return offset; - } - - - noff = offset; - doff = ELF_ALIGN(offset + namesz); - - if (offset + namesz > size) { - /* - * We're past the end of the buffer. - */ - return doff; - } - - offset = ELF_ALIGN(doff + descsz); - if (doff + descsz > size) { - /* - * We're past the end of the buffer. - */ - return (offset >= size) ? offset : size; + if (namesz == 4 && strcmp((char *)&nbuf[noff], "GNU") == 0 && + type == NT_GNU_BUILD_ID && (descsz == 16 || descsz == 20)) { + uint8_t desc[20]; + uint32_t i; + *flags |= FLAGS_DID_BUILD_ID; + if (file_printf(ms, ", BuildID[%s]=", descsz == 16 ? "md5/uuid" : + "sha1") == -1) + return 1; + (void)memcpy(desc, &nbuf[doff], descsz); + for (i = 0; i < descsz; i++) + if (file_printf(ms, "%02x", desc[i]) == -1) + return 1; + return 1; } + return 0; +} - if ((*flags & (FLAGS_DID_NOTE|FLAGS_DID_BUILD_ID)) == - (FLAGS_DID_NOTE|FLAGS_DID_BUILD_ID)) - goto core; - +private int +do_os_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type, + int swap, uint32_t namesz, uint32_t descsz, + size_t noff, size_t doff, int *flags) +{ if (namesz == 5 && strcmp((char *)&nbuf[noff], "SuSE") == 0 && - xnh_type == NT_GNU_VERSION && descsz == 2) { + type == NT_GNU_VERSION && descsz == 2) { + *flags |= FLAGS_DID_OS_NOTE; file_printf(ms, ", for SuSE %d.%d", nbuf[doff], nbuf[doff + 1]); + return 1; } + if (namesz == 4 && strcmp((char *)&nbuf[noff], "GNU") == 0 && - xnh_type == NT_GNU_VERSION && descsz == 16) { + type == NT_GNU_VERSION && descsz == 16) { uint32_t desc[4]; (void)memcpy(desc, &nbuf[doff], sizeof(desc)); + *flags |= FLAGS_DID_OS_NOTE; if (file_printf(ms, ", for GNU/") == -1) - return size; + return 1; switch (elf_getu32(swap, desc[0])) { case GNU_OS_LINUX: if (file_printf(ms, "Linux") == -1) - return size; + return 1; break; case GNU_OS_HURD: if (file_printf(ms, "Hurd") == -1) - return size; + return 1; break; case GNU_OS_SOLARIS: if (file_printf(ms, "Solaris") == -1) - return size; + return 1; break; case GNU_OS_KFREEBSD: if (file_printf(ms, "kFreeBSD") == -1) - return size; + return 1; break; case GNU_OS_KNETBSD: if (file_printf(ms, "kNetBSD") == -1) - return size; + return 1; break; default: if (file_printf(ms, "<unknown>") == -1) - return size; + return 1; } if (file_printf(ms, " %d.%d.%d", elf_getu32(swap, desc[1]), elf_getu32(swap, desc[2]), elf_getu32(swap, desc[3])) == -1) - return size; - *flags |= FLAGS_DID_NOTE; - return size; + return 1; + return 1; } - if (namesz == 4 && strcmp((char *)&nbuf[noff], "GNU") == 0 && - xnh_type == NT_GNU_BUILD_ID && (descsz == 16 || descsz == 20)) { - uint8_t desc[20]; - uint32_t i; - if (file_printf(ms, ", BuildID[%s]=", descsz == 16 ? "md5/uuid" : - "sha1") == -1) - return size; - (void)memcpy(desc, &nbuf[doff], descsz); - for (i = 0; i < descsz; i++) - if (file_printf(ms, "%02x", desc[i]) == -1) - return size; - *flags |= FLAGS_DID_BUILD_ID; + if (namesz == 7 && strcmp((char *)&nbuf[noff], "NetBSD") == 0) { + if (type == NT_NETBSD_VERSION && descsz == 4) { + *flags |= FLAGS_DID_OS_NOTE; + do_note_netbsd_version(ms, swap, &nbuf[doff]); + return 1; + } + } + + if (namesz == 8 && strcmp((char *)&nbuf[noff], "FreeBSD") == 0) { + if (type == NT_FREEBSD_VERSION && descsz == 4) { + *flags |= FLAGS_DID_OS_NOTE; + do_note_freebsd_version(ms, swap, &nbuf[doff]); + return 1; + } + } + + if (namesz == 8 && strcmp((char *)&nbuf[noff], "OpenBSD") == 0 && + type == NT_OPENBSD_VERSION && descsz == 4) { + *flags |= FLAGS_DID_OS_NOTE; + if (file_printf(ms, ", for OpenBSD") == -1) + return 1; + /* Content of note is always 0 */ + return 1; + } + + if (namesz == 10 && strcmp((char *)&nbuf[noff], "DragonFly") == 0 && + type == NT_DRAGONFLY_VERSION && descsz == 4) { + uint32_t desc; + *flags |= FLAGS_DID_OS_NOTE; + if (file_printf(ms, ", for DragonFly") == -1) + return 1; + (void)memcpy(&desc, &nbuf[doff], sizeof(desc)); + desc = elf_getu32(swap, desc); + if (file_printf(ms, " %d.%d.%d", desc / 100000, + desc / 10000 % 10, desc % 10000) == -1) + return 1; + return 1; } + return 0; +} +private int +do_pax_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type, + int swap, uint32_t namesz, uint32_t descsz, + size_t noff, size_t doff, int *flags) +{ if (namesz == 4 && strcmp((char *)&nbuf[noff], "PaX") == 0 && - xnh_type == NT_NETBSD_PAX && descsz == 4) { + type == NT_NETBSD_PAX && descsz == 4) { static const char *pax[] = { "+mprotect", "-mprotect", @@ -595,80 +614,32 @@ donote(struct magic_set *ms, void *vbuf, size_t offset, size_t size, size_t i; int did = 0; + *flags |= FLAGS_DID_NETBSD_PAX; (void)memcpy(&desc, &nbuf[doff], sizeof(desc)); desc = elf_getu32(swap, desc); if (desc && file_printf(ms, ", PaX: ") == -1) - return size; + return 1; for (i = 0; i < __arraycount(pax); i++) { if (((1 << i) & desc) == 0) continue; if (file_printf(ms, "%s%s", did++ ? "," : "", pax[i]) == -1) - return size; - } - } - - if (namesz == 7 && strcmp((char *)&nbuf[noff], "NetBSD") == 0) { - switch (xnh_type) { - case NT_NETBSD_VERSION: - if (descsz == 4) { - do_note_netbsd_version(ms, swap, &nbuf[doff]); - *flags |= FLAGS_DID_NOTE; - return size; - } - break; - case NT_NETBSD_MARCH: - if (file_printf(ms, ", compiled for: %.*s", (int)descsz, - (const char *)&nbuf[doff]) == -1) - return size; - break; - case NT_NETBSD_CMODEL: - if (file_printf(ms, ", compiler model: %.*s", - (int)descsz, (const char *)&nbuf[doff]) == -1) - return size; - break; - default: - if (file_printf(ms, ", note=%u", xnh_type) == -1) - return size; - break; - } - return size; - } - - if (namesz == 8 && strcmp((char *)&nbuf[noff], "FreeBSD") == 0) { - if (xnh_type == NT_FREEBSD_VERSION && descsz == 4) { - do_note_freebsd_version(ms, swap, &nbuf[doff]); - *flags |= FLAGS_DID_NOTE; - return size; + return 1; } + return 1; } + return 0; +} - if (namesz == 8 && strcmp((char *)&nbuf[noff], "OpenBSD") == 0 && - xnh_type == NT_OPENBSD_VERSION && descsz == 4) { - if (file_printf(ms, ", for OpenBSD") == -1) - return size; - /* Content of note is always 0 */ - *flags |= FLAGS_DID_NOTE; - return size; - } - - if (namesz == 10 && strcmp((char *)&nbuf[noff], "DragonFly") == 0 && - xnh_type == NT_DRAGONFLY_VERSION && descsz == 4) { - uint32_t desc; - if (file_printf(ms, ", for DragonFly") == -1) - return size; - (void)memcpy(&desc, &nbuf[doff], sizeof(desc)); - desc = elf_getu32(swap, desc); - if (file_printf(ms, " %d.%d.%d", desc / 100000, - desc / 10000 % 10, desc % 10000) == -1) - return size; - *flags |= FLAGS_DID_NOTE; - return size; - } - -core: +private int +do_core_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type, + int swap, uint32_t namesz, uint32_t descsz, + size_t noff, size_t doff, int *flags, size_t size, int clazz) +{ +#ifdef ELFCORE + int os_style = -1; /* * Sigh. The 2.0.36 kernel in Debian 2.1, at * least, doesn't correctly implement name @@ -697,20 +668,17 @@ core: os_style = OS_STYLE_NETBSD; } -#ifdef ELFCORE - if ((*flags & FLAGS_DID_CORE) != 0) - return size; - if (os_style != -1 && (*flags & FLAGS_DID_CORE_STYLE) == 0) { if (file_printf(ms, ", %s-style", os_style_names[os_style]) == -1) - return size; + return 1; *flags |= FLAGS_DID_CORE_STYLE; } switch (os_style) { case OS_STYLE_NETBSD: - if (xnh_type == NT_NETBSD_CORE_PROCINFO) { + if (type == NT_NETBSD_CORE_PROCINFO) { + char sbuf[512]; uint32_t signo; /* * Extract the program name. It is at @@ -718,8 +686,9 @@ core: * including the terminating NUL. */ if (file_printf(ms, ", from '%.31s'", - &nbuf[doff + 0x7c]) == -1) - return size; + file_printable(sbuf, sizeof(sbuf), + (const char *)&nbuf[doff + 0x7c])) == -1) + return 1; /* * Extract the signal number. It is at @@ -729,14 +698,14 @@ core: sizeof(signo)); if (file_printf(ms, " (signal %u)", elf_getu32(swap, signo)) == -1) - return size; + return 1; *flags |= FLAGS_DID_CORE; - return size; + return 1; } break; default: - if (xnh_type == NT_PRPSINFO && *flags & FLAGS_IS_CORE) { + if (type == NT_PRPSINFO && *flags & FLAGS_IS_CORE) { size_t i, j; unsigned char c; /* @@ -804,7 +773,7 @@ core: * Try next offsets, in case this match is * in the middle of a string. */ - for (k = i + 1 ; k < NOFFSETS ; k++) { + for (k = i + 1 ; k < NOFFSETS; k++) { size_t no; int adjust = 1; if (prpsoffsets(k) >= prpsoffsets(i)) @@ -829,9 +798,9 @@ core: cp--; if (file_printf(ms, ", from '%.*s'", (int)(cp - cname), cname) == -1) - return size; + return 1; *flags |= FLAGS_DID_CORE; - return size; + return 1; tryanother: ; @@ -840,6 +809,129 @@ core: break; } #endif + return 0; +} + +private size_t +donote(struct magic_set *ms, void *vbuf, size_t offset, size_t size, + int clazz, int swap, size_t align, int *flags, uint16_t *notecount) +{ + Elf32_Nhdr nh32; + Elf64_Nhdr nh64; + size_t noff, doff; + uint32_t namesz, descsz; + unsigned char *nbuf = CAST(unsigned char *, vbuf); + + if (*notecount == 0) + return 0; + --*notecount; + + if (xnh_sizeof + offset > size) { + /* + * We're out of note headers. + */ + return xnh_sizeof + offset; + } + + (void)memcpy(xnh_addr, &nbuf[offset], xnh_sizeof); + offset += xnh_sizeof; + + namesz = xnh_namesz; + descsz = xnh_descsz; + if ((namesz == 0) && (descsz == 0)) { + /* + * We're out of note headers. + */ + return (offset >= size) ? offset : size; + } + + if (namesz & 0x80000000) { + (void)file_printf(ms, ", bad note name size 0x%lx", + (unsigned long)namesz); + return 0; + } + + if (descsz & 0x80000000) { + (void)file_printf(ms, ", bad note description size 0x%lx", + (unsigned long)descsz); + return 0; + } + + noff = offset; + doff = ELF_ALIGN(offset + namesz); + + if (offset + namesz > size) { + /* + * We're past the end of the buffer. + */ + return doff; + } + + offset = ELF_ALIGN(doff + descsz); + if (doff + descsz > size) { + /* + * We're past the end of the buffer. + */ + return (offset >= size) ? offset : size; + } + + if ((*flags & FLAGS_DID_OS_NOTE) == 0) { + if (do_os_note(ms, nbuf, xnh_type, swap, + namesz, descsz, noff, doff, flags)) + return size; + } + + if ((*flags & FLAGS_DID_BUILD_ID) == 0) { + if (do_bid_note(ms, nbuf, xnh_type, swap, + namesz, descsz, noff, doff, flags)) + return size; + } + + if ((*flags & FLAGS_DID_NETBSD_PAX) == 0) { + if (do_pax_note(ms, nbuf, xnh_type, swap, + namesz, descsz, noff, doff, flags)) + return size; + } + + if ((*flags & FLAGS_DID_CORE) == 0) { + if (do_core_note(ms, nbuf, xnh_type, swap, + namesz, descsz, noff, doff, flags, size, clazz)) + return size; + } + + if (namesz == 7 && strcmp((char *)&nbuf[noff], "NetBSD") == 0) { + if (descsz > 100) + descsz = 100; + switch (xnh_type) { + case NT_NETBSD_VERSION: + return size; + case NT_NETBSD_MARCH: + if (*flags & FLAGS_DID_NETBSD_MARCH) + return size; + *flags |= FLAGS_DID_NETBSD_MARCH; + if (file_printf(ms, ", compiled for: %.*s", + (int)descsz, (const char *)&nbuf[doff]) == -1) + return size; + break; + case NT_NETBSD_CMODEL: + if (*flags & FLAGS_DID_NETBSD_CMODEL) + return size; + *flags |= FLAGS_DID_NETBSD_CMODEL; + if (file_printf(ms, ", compiler model: %.*s", + (int)descsz, (const char *)&nbuf[doff]) == -1) + return size; + break; + default: + if (*flags & FLAGS_DID_NETBSD_UNKNOWN) + return size; + *flags |= FLAGS_DID_NETBSD_UNKNOWN; + if (file_printf(ms, ", note=%u", xnh_type) == -1) + return size; + break; + } + return size; + } + return offset; } @@ -895,16 +987,19 @@ static const cap_desc_t cap_desc_386[] = { private int doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num, - size_t size, off_t fsize, int *flags, int mach, int strtab) + size_t size, off_t fsize, int mach, int strtab, int *flags, + uint16_t *notecount) { Elf32_Shdr sh32; Elf64_Shdr sh64; int stripped = 1; + size_t nbadcap = 0; void *nbuf; off_t noff, coff, name_off; uint64_t cap_hw1 = 0; /* SunOS 5.x hardware capabilites */ uint64_t cap_sf1 = 0; /* SunOS 5.x software capabilites */ char name[50]; + ssize_t namesize; if (size != xsh_sizeof) { if (file_printf(ms, ", corrupted section header size") == -1) @@ -913,7 +1008,7 @@ doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num, } /* Read offset of name section to be able to read section names later */ - if (pread(fd, xsh_addr, xsh_sizeof, off + size * strtab) == -1) { + if (pread(fd, xsh_addr, xsh_sizeof, off + size * strtab) < (ssize_t)xsh_sizeof) { file_badread(ms); return -1; } @@ -921,15 +1016,15 @@ doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num, for ( ; num; num--) { /* Read the name of this section. */ - if (pread(fd, name, sizeof(name), name_off + xsh_name) == -1) { + if ((namesize = pread(fd, name, sizeof(name) - 1, name_off + xsh_name)) == -1) { file_badread(ms); return -1; } - name[sizeof(name) - 1] = '\0'; + name[namesize] = '\0'; if (strcmp(name, ".debug_info") == 0) stripped = 0; - if (pread(fd, xsh_addr, xsh_sizeof, off) == -1) { + if (pread(fd, xsh_addr, xsh_sizeof, off) < (ssize_t)xsh_sizeof) { file_badread(ms); return -1; } @@ -944,7 +1039,7 @@ doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num, stripped = 0; break; default: - if (xsh_offset > fsize) { + if (fsize != SIZE_UNKNOWN && xsh_offset > fsize) { /* Perhaps warn here */ continue; } @@ -959,7 +1054,7 @@ doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num, " for note"); return -1; } - if (pread(fd, nbuf, xsh_size, xsh_offset) == -1) { + if (pread(fd, nbuf, xsh_size, xsh_offset) < (ssize_t)xsh_size) { file_badread(ms); free(nbuf); return -1; @@ -970,7 +1065,7 @@ doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num, if (noff >= (off_t)xsh_size) break; noff = donote(ms, nbuf, (size_t)noff, - xsh_size, clazz, swap, 4, flags); + xsh_size, clazz, swap, 4, flags, notecount); if (noff == 0) break; } @@ -988,6 +1083,8 @@ doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num, goto skip; } + if (nbadcap > 5) + break; if (lseek(fd, xsh_offset, SEEK_SET) == (off_t)-1) { file_badseek(ms); return -1; @@ -1053,6 +1150,8 @@ doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num, (unsigned long long)xcap_tag, (unsigned long long)xcap_val) == -1) return -1; + if (nbadcap++ > 2) + coff = xsh_size; break; } } @@ -1133,13 +1232,15 @@ doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num, */ private int dophn_exec(struct magic_set *ms, int clazz, int swap, int fd, off_t off, - int num, size_t size, off_t fsize, int *flags, int sh_num) + int num, size_t size, off_t fsize, int sh_num, int *flags, + uint16_t *notecount) { Elf32_Phdr ph32; Elf64_Phdr ph64; const char *linking_style = "statically"; - const char *shared_libraries = ""; + const char *interp = ""; unsigned char nbuf[BUFSIZ]; + char ibuf[BUFSIZ]; ssize_t bufsize; size_t offset, align, len; @@ -1150,23 +1251,43 @@ dophn_exec(struct magic_set *ms, int clazz, int swap, int fd, off_t off, } for ( ; num; num--) { - if (pread(fd, xph_addr, xph_sizeof, off) == -1) { + if (pread(fd, xph_addr, xph_sizeof, off) < (ssize_t)xph_sizeof) { file_badread(ms); return -1; } off += size; + bufsize = 0; + align = 4; /* Things we can determine before we seek */ switch (xph_type) { case PT_DYNAMIC: linking_style = "dynamically"; break; + case PT_NOTE: + if (sh_num) /* Did this through section headers */ + continue; + if (((align = xph_align) & 0x80000000UL) != 0 || + align < 4) { + if (file_printf(ms, + ", invalid note alignment 0x%lx", + (unsigned long)align) == -1) + return -1; + align = 4; + } + /*FALLTHROUGH*/ case PT_INTERP: - shared_libraries = " (uses shared libs)"; + len = xph_filesz < sizeof(nbuf) ? xph_filesz + : sizeof(nbuf); + bufsize = pread(fd, nbuf, len, xph_offset); + if (bufsize == -1) { + file_badread(ms); + return -1; + } break; default: - if (xph_offset > fsize) { + if (fsize != SIZE_UNKNOWN && xph_offset > fsize) { /* Maybe warn here? */ continue; } @@ -1175,34 +1296,25 @@ dophn_exec(struct magic_set *ms, int clazz, int swap, int fd, off_t off, /* Things we can determine when we seek */ switch (xph_type) { + case PT_INTERP: + if (bufsize && nbuf[0]) { + nbuf[bufsize - 1] = '\0'; + interp = (const char *)nbuf; + } else + interp = "*empty*"; + break; case PT_NOTE: - if ((align = xph_align) & 0x80000000UL) { - if (file_printf(ms, - ", invalid note alignment 0x%lx", - (unsigned long)align) == -1) - return -1; - align = 4; - } - if (sh_num) - break; /* * This is a PT_NOTE section; loop through all the notes * in the section. */ - len = xph_filesz < sizeof(nbuf) ? xph_filesz - : sizeof(nbuf); - bufsize = pread(fd, nbuf, len, xph_offset); - if (bufsize == -1) { - file_badread(ms); - return -1; - } offset = 0; for (;;) { if (offset >= (size_t)bufsize) break; offset = donote(ms, nbuf, offset, (size_t)bufsize, clazz, swap, align, - flags); + flags, notecount); if (offset == 0) break; } @@ -1211,9 +1323,13 @@ dophn_exec(struct magic_set *ms, int clazz, int swap, int fd, off_t off, break; } } - if (file_printf(ms, ", %s linked%s", linking_style, shared_libraries) + if (file_printf(ms, ", %s linked", linking_style) == -1) - return -1; + return -1; + if (interp[0]) + if (file_printf(ms, ", interpreter %s", + file_printable(ibuf, sizeof(ibuf), interp)) == -1) + return -1; return 0; } @@ -1233,7 +1349,7 @@ file_tryelf(struct magic_set *ms, int fd, const unsigned char *buf, int flags = 0; Elf32_Ehdr elf32hdr; Elf64_Ehdr elf64hdr; - uint16_t type; + uint16_t type, phnum, shnum, notecount; if (ms->flags & (MAGIC_MIME|MAGIC_APPLE)) return 0; @@ -1259,7 +1375,10 @@ file_tryelf(struct magic_set *ms, int fd, const unsigned char *buf, file_badread(ms); return -1; } - fsize = st.st_size; + if (S_ISREG(st.st_mode) || st.st_size != 0) + fsize = st.st_size; + else + fsize = SIZE_UNKNOWN; clazz = buf[EI_CLASS]; |