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07a490 |
diff -up bash-4.0/execute_cmd.c.nobits bash-4.0/execute_cmd.c
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--- bash-4.0/execute_cmd.c.nobits 2009-08-11 11:53:38.000000000 +0200
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+++ bash-4.0/execute_cmd.c 2009-08-14 16:18:18.000000000 +0200
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@@ -4747,6 +4747,7 @@ shell_execve (command, args, env)
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&& memcmp (sample, ELFMAG, SELFMAG) == 0)
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{
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off_t offset = -1;
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+ int dynamic_nobits = 0;
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/* It is an ELF file. Now determine whether it is dynamically
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linked and if yes, get the offset of the interpreter
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@@ -4756,13 +4757,61 @@ shell_execve (command, args, env)
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{
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Elf32_Ehdr ehdr;
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Elf32_Phdr *phdr;
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- int nphdr;
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+ Elf32_Shdr *shdr;
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+ int nphdr, nshdr;
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/* We have to copy the data since the sample buffer
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might not be aligned correctly to be accessed as
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an Elf32_Ehdr struct. */
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memcpy (&ehdr, sample, sizeof (Elf32_Ehdr));
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+ nshdr = ehdr.e_shnum;
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+ shdr = (Elf32_Shdr *) malloc (nshdr * ehdr.e_shentsize);
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+
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+ if (shdr != NULL)
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+ {
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+#ifdef HAVE_PREAD
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+ sample_len = pread (fd, shdr, nshdr * ehdr.e_shentsize,
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+ ehdr.e_shoff);
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+#else
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+ if (lseek (fd, ehdr.e_shoff, SEEK_SET) != -1)
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+ sample_len = read (fd, shdr,
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+ nshdr * ehdr.e_shentsize);
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+ else
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+ sample_len = -1;
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+#endif
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+ if (sample_len == nshdr * ehdr.e_shentsize)
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+ {
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+ char *strings = (char *) malloc (shdr[ehdr.e_shstrndx].sh_size);
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+ if (strings != NULL)
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+ {
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+#ifdef HAVE_PREAD
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+ sample_len = pread (fd, strings,
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+ shdr[ehdr.e_shstrndx].sh_size,
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+ shdr[ehdr.e_shstrndx].sh_offset);
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+#else
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+ if (lseek (fd, shdr[ehdr.e_shstrndx].sh_offset,
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+ SEEK_SET) != -1)
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+ sample_len = read (fd, strings,
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+ shdr[ehdr.e_shstrndx].sh_size);
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+ else
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+ sample_len = -1;
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+#endif
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+ if (sample_len == shdr[ehdr.e_shstrndx].sh_size)
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+ while (nshdr-- > 0)
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+ if (strcmp (strings + shdr[nshdr].sh_name,
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+ ".interp") == 0 &&
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+ shdr[nshdr].sh_type == SHT_NOBITS)
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+ {
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+ dynamic_nobits++;
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+ break;
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+ }
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+ free (strings);
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+ }
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+ }
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+ free (shdr);
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+ }
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+
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nphdr = ehdr.e_phnum;
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phdr = (Elf32_Phdr *) malloc (nphdr * ehdr.e_phentsize);
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if (phdr != NULL)
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@@ -4792,13 +4841,60 @@ shell_execve (command, args, env)
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{
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Elf64_Ehdr ehdr;
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Elf64_Phdr *phdr;
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- int nphdr;
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+ Elf64_Shdr *shdr;
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+ int nphdr, nshdr;
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/* We have to copy the data since the sample buffer
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might not be aligned correctly to be accessed as
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an Elf64_Ehdr struct. */
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memcpy (&ehdr, sample, sizeof (Elf64_Ehdr));
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+ nshdr = ehdr.e_shnum;
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+ shdr = (Elf64_Shdr *) malloc (nshdr * ehdr.e_shentsize);
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+ if (shdr != NULL)
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+ {
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+#ifdef HAVE_PREAD
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+ sample_len = pread (fd, shdr, nshdr * ehdr.e_shentsize,
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+ ehdr.e_shoff);
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+#else
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+ if (lseek (fd, ehdr.e_shoff, SEEK_SET) != -1)
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+ sample_len = read (fd, shdr,
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+ nshdr * ehdr.e_shentsize);
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+ else
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+ sample_len = -1;
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+#endif
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+ if (sample_len == nshdr * ehdr.e_shentsize)
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+ {
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+ char *strings = (char *) malloc (shdr[ehdr.e_shstrndx].sh_size);
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+ if (strings != NULL)
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+ {
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+#ifdef HAVE_PREAD
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+ sample_len = pread (fd, strings,
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+ shdr[ehdr.e_shstrndx].sh_size,
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+ shdr[ehdr.e_shstrndx].sh_offset);
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+#else
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+ if (lseek (fd, shdr[ehdr.e_shstrndx].sh_offset,
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+ SEEK_SET) != -1)
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+ sample_len = read (fd, strings,
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+ shdr[ehdr.e_shstrndx].sh_size);
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+ else
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+ sample_len = -1;
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+#endif
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+ if (sample_len == shdr[ehdr.e_shstrndx].sh_size)
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+ while (nshdr-- > 0)
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+ if (strcmp (strings + shdr[nshdr].sh_name,
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+ ".interp") == 0 &&
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+ shdr[nshdr].sh_type == SHT_NOBITS)
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+ {
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+ dynamic_nobits++;
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+ break;
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+ }
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+ free (strings);
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+ }
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+ }
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+ free (shdr);
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+ }
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+
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nphdr = ehdr.e_phnum;
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phdr = (Elf64_Phdr *) malloc (nphdr * ehdr.e_phentsize);
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if (phdr != NULL)
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@@ -4858,8 +4954,15 @@ shell_execve (command, args, env)
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{
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close (fd);
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errno = i;
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- sys_error ("%s: %s: bad ELF interpreter", command,
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- interp);
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+ if (dynamic_nobits > 0)
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+ {
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+ sys_error ("%s: bad ELF interpreter", command);
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+ }
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+ else
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+ {
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+ sys_error ("%s: %s: bad ELF interpreter", command,
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+ interp);
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+ }
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free (interp);
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return (EX_NOEXEC);
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}
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