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Update.
2000-05-26 Andreas Jaeger <aj@suse.de> * elf/ldconfig.h: Update parameter list for process_elf_file. * sysdeps/unix/sysv/linux/sparc/readelflib.c (process_elf_file): Add parameter file_length and pass it ot process_elf*file. * sysdeps/generic/readelflib.c (check_ptr): New. (process_elf_file): Use check_ptr to check all accesses to the mmapped file. Add parameter file_length. * elf/readlib.c (known_libs): Use <gnu/lib-names.h> to specify library names. * sunrpc/xdr_intXX_t.c (xdr_uint8_t): Fix conversion. Closes PR libc/1573, reported by Bradley White <bww@laurelnetworks.com>.
This commit is contained in:
Andreas Jaeger
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18
ChangeLog
18
ChangeLog
@ -1,3 +1,21 @@
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2000-05-26 Andreas Jaeger <aj@suse.de>
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* elf/ldconfig.h: Update parameter list for process_elf_file.
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* sysdeps/unix/sysv/linux/sparc/readelflib.c (process_elf_file):
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Add parameter file_length and pass it ot process_elf*file.
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* sysdeps/generic/readelflib.c (check_ptr): New.
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(process_elf_file): Use check_ptr to check all accesses to the
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mmapped file. Add parameter file_length.
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* elf/readlib.c (known_libs): Use <gnu/lib-names.h> to specify
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library names.
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* sunrpc/xdr_intXX_t.c (xdr_uint8_t): Fix conversion.
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Closes PR libc/1573, reported by Bradley White
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<bww@laurelnetworks.com>.
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2000-05-25 Ulrich Drepper <drepper@redhat.com>
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* sysdeps/i386/fpu/bits/mathinline.h: Define expm1 inline only if
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@ -46,7 +46,8 @@ extern int process_file (const char *file_name, const char *lib, int *flag,
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/* Declared in readelflib.c. */
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extern int process_elf_file (const char *file_name, const char *lib, int *flag,
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char **soname, void *file_contents);
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char **soname, void *file_contents,
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size_t file_length);
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/* Declared in ldconfig.c. */
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@ -35,6 +35,7 @@
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <gnu/lib-names.h>
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#include "ldconfig.h"
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@ -49,23 +50,26 @@ struct known_names
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static struct known_names interpreters [] =
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{
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{"/lib/ld-linux.so.2", FLAG_ELF_LIBC6},
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{"/lib/" LD_LINUX_SO, FLAG_ELF_LIBC6},
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{"/lib/ld-linux.so.1", FLAG_ELF_LIBC5}
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};
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static struct known_names known_libs [] =
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{
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{"libc.so.6", FLAG_ELF_LIBC6},
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/* Old names: */
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{"libc.so.5", FLAG_ELF_LIBC5},
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{"libm.so.6", FLAG_ELF_LIBC6},
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{"libm.so.5", FLAG_ELF_LIBC5}
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{"libm.so.5", FLAG_ELF_LIBC5},
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/* Current names: */
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{LIBC_SO, FLAG_ELF_LIBC6},
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{LIBM_SO, FLAG_ELF_LIBC6}
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};
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/* Returns 0 if everything is ok, != 0 in case of error. */
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int
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process_file (const char *file_name, const char *lib, int *flag, char **soname, int is_link)
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process_file (const char *file_name, const char *lib, int *flag,
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char **soname, int is_link)
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{
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FILE *file;
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struct stat statbuf;
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@ -156,7 +160,8 @@ process_file (const char *file_name, const char *lib, int *flag, char **soname,
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goto done;
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}
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if (process_elf_file (file_name, lib, flag, soname, file_contents))
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if (process_elf_file (file_name, lib, flag, soname, file_contents,
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statbuf.st_size))
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ret = 1;
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done:
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@ -23,10 +23,24 @@
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which need to handle both 32bit and 64bit ELF libraries, this file is
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included twice for each arch size. */
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/* check_ptr checks that a pointer is in the mmaped file and doesn't
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point outside it. */
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#define check_ptr(ptr) \
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do \
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{ \
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if ((void *)(ptr) < file_contents \
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|| (void *)(ptr) > (file_contents+file_length)) \
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{ \
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error (0, 0, _("file %s is truncated\n"), file_name); \
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return 1; \
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} \
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} \
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while (0);
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/* Returns 0 if everything is ok, != 0 in case of error. */
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int
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process_elf_file (const char *file_name, const char *lib, int *flag, char **soname,
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void *file_contents)
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process_elf_file (const char *file_name, const char *lib, int *flag,
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char **soname, void *file_contents, size_t file_length)
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{
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int i;
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unsigned int j;
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@ -65,6 +79,7 @@ process_elf_file (const char *file_name, const char *lib, int *flag, char **sona
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/* Get information from elf program header. */
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elf_pheader = (ElfW(Phdr) *) (elf_header->e_phoff + file_contents);
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check_ptr (elf_pheader);
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/* The library is an elf library, now search for soname and
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libc5/libc6. */
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@ -77,6 +92,8 @@ process_elf_file (const char *file_name, const char *lib, int *flag, char **sona
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for (i = 0, segment = elf_pheader;
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i < elf_header->e_phnum; i++, segment++)
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{
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check_ptr (segment);
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switch (segment->p_type)
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{
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case PT_LOAD:
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@ -94,6 +111,7 @@ process_elf_file (const char *file_name, const char *lib, int *flag, char **sona
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break;
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case PT_INTERP:
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program_interpreter = (char *) (file_contents + segment->p_offset);
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check_ptr (program_interpreter);
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/* Check if this is enough to classify the binary. */
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for (j = 0; j < sizeof (interpreters) / sizeof (interpreters [0]);
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@ -120,15 +138,18 @@ process_elf_file (const char *file_name, const char *lib, int *flag, char **sona
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return 1;
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dynamic_segment = (ElfW(Dyn) *) (file_contents + dynamic_addr);
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check_ptr (dynamic_segment);
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/* Find the string table. */
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dynamic_strings = NULL;
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for (dyn_entry = dynamic_segment; dyn_entry->d_tag != DT_NULL;
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++dyn_entry)
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{
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check_ptr (dyn_entry);
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if (dyn_entry->d_tag == DT_STRTAB)
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{
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dynamic_strings = (char *) (file_contents + dyn_entry->d_un.d_val - loadaddr);
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check_ptr (dynamic_strings);
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break;
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}
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}
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@ -143,6 +164,7 @@ process_elf_file (const char *file_name, const char *lib, int *flag, char **sona
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if (dyn_entry->d_tag == DT_NEEDED || dyn_entry->d_tag == DT_SONAME)
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{
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char *name = dynamic_strings + dyn_entry->d_un.d_val;
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check_ptr (name);
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if (dyn_entry->d_tag == DT_NEEDED)
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{
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@ -20,23 +20,27 @@
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int process_elf32_file (const char *file_name, const char *lib, int *flag,
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char **soname, void *file_contents);
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char **soname, void *file_contents,
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size_t file_length);
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int process_elf64_file (const char *file_name, const char *lib, int *flag,
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char **soname, void *file_contents);
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char **soname, void *file_contents,
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size_t file_length);
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/* Returns 0 if everything is ok, != 0 in case of error. */
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int
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process_elf_file (const char *file_name, const char *lib, int *flag,
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char **soname, void *file_contents)
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char **soname, void *file_contents, size_t file_length)
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{
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ElfW(Ehdr) *elf_header = (ElfW(Ehdr) *) file_contents;
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int ret;
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if (elf_header->e_ident [EI_CLASS] == ELFCLASS32)
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return process_elf32_file (file_name, lib, flag, soname, file_contents);
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return process_elf32_file (file_name, lib, flag, soname, file_contents,
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file_length);
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else
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{
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ret = process_elf64_file (file_name, lib, flag, soname, file_contents);
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ret = process_elf64_file (file_name, lib, flag, soname, file_contents,
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file_length);
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/* Sparc 64bit libraries are always libc.so.6+. */
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if (!ret)
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*flag = FLAG_SPARC_LIB64|FLAG_ELF_LIBC6;
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