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check if interp section is NOBITS. define Recycles pids

This commit is contained in:
Roman Rakus 2009-09-04 12:59:22 +00:00
parent e26949b646
commit 8c9d1c098a
2 changed files with 167 additions and 2 deletions
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154
bash-4.0-nobits.patch Normal file
View File

@ -0,0 +1,154 @@
diff -up bash-4.0/execute_cmd.c.nobits bash-4.0/execute_cmd.c
--- bash-4.0/execute_cmd.c.nobits 2009-08-11 11:53:38.000000000 +0200
+++ bash-4.0/execute_cmd.c 2009-08-14 16:18:18.000000000 +0200
@@ -4747,6 +4747,7 @@ shell_execve (command, args, env)
&& memcmp (sample, ELFMAG, SELFMAG) == 0)
{
off_t offset = -1;
+ int dynamic_nobits = 0;
/* It is an ELF file. Now determine whether it is dynamically
linked and if yes, get the offset of the interpreter
@@ -4756,13 +4757,61 @@ shell_execve (command, args, env)
{
Elf32_Ehdr ehdr;
Elf32_Phdr *phdr;
- int nphdr;
+ Elf32_Shdr *shdr;
+ int nphdr, nshdr;
/* We have to copy the data since the sample buffer
might not be aligned correctly to be accessed as
an Elf32_Ehdr struct. */
memcpy (&ehdr, sample, sizeof (Elf32_Ehdr));
+ nshdr = ehdr.e_shnum;
+ shdr = (Elf32_Shdr *) malloc (nshdr * ehdr.e_shentsize);
+
+ if (shdr != NULL)
+ {
+#ifdef HAVE_PREAD
+ sample_len = pread (fd, shdr, nshdr * ehdr.e_shentsize,
+ ehdr.e_shoff);
+#else
+ if (lseek (fd, ehdr.e_shoff, SEEK_SET) != -1)
+ sample_len = read (fd, shdr,
+ nshdr * ehdr.e_shentsize);
+ else
+ sample_len = -1;
+#endif
+ if (sample_len == nshdr * ehdr.e_shentsize)
+ {
+ char *strings = (char *) malloc (shdr[ehdr.e_shstrndx].sh_size);
+ if (strings != NULL)
+ {
+#ifdef HAVE_PREAD
+ sample_len = pread (fd, strings,
+ shdr[ehdr.e_shstrndx].sh_size,
+ shdr[ehdr.e_shstrndx].sh_offset);
+#else
+ if (lseek (fd, shdr[ehdr.e_shstrndx].sh_offset,
+ SEEK_SET) != -1)
+ sample_len = read (fd, strings,
+ shdr[ehdr.e_shstrndx].sh_size);
+ else
+ sample_len = -1;
+#endif
+ if (sample_len == shdr[ehdr.e_shstrndx].sh_size)
+ while (nshdr-- > 0)
+ if (strcmp (strings + shdr[nshdr].sh_name,
+ ".interp") == 0 &&
+ shdr[nshdr].sh_type == SHT_NOBITS)
+ {
+ dynamic_nobits++;
+ break;
+ }
+ free (strings);
+ }
+ }
+ free (shdr);
+ }
+
nphdr = ehdr.e_phnum;
phdr = (Elf32_Phdr *) malloc (nphdr * ehdr.e_phentsize);
if (phdr != NULL)
@@ -4792,13 +4841,60 @@ shell_execve (command, args, env)
{
Elf64_Ehdr ehdr;
Elf64_Phdr *phdr;
- int nphdr;
+ Elf64_Shdr *shdr;
+ int nphdr, nshdr;
/* We have to copy the data since the sample buffer
might not be aligned correctly to be accessed as
an Elf64_Ehdr struct. */
memcpy (&ehdr, sample, sizeof (Elf64_Ehdr));
+ nshdr = ehdr.e_shnum;
+ shdr = (Elf64_Shdr *) malloc (nshdr * ehdr.e_shentsize);
+ if (shdr != NULL)
+ {
+#ifdef HAVE_PREAD
+ sample_len = pread (fd, shdr, nshdr * ehdr.e_shentsize,
+ ehdr.e_shoff);
+#else
+ if (lseek (fd, ehdr.e_shoff, SEEK_SET) != -1)
+ sample_len = read (fd, shdr,
+ nshdr * ehdr.e_shentsize);
+ else
+ sample_len = -1;
+#endif
+ if (sample_len == nshdr * ehdr.e_shentsize)
+ {
+ char *strings = (char *) malloc (shdr[ehdr.e_shstrndx].sh_size);
+ if (strings != NULL)
+ {
+#ifdef HAVE_PREAD
+ sample_len = pread (fd, strings,
+ shdr[ehdr.e_shstrndx].sh_size,
+ shdr[ehdr.e_shstrndx].sh_offset);
+#else
+ if (lseek (fd, shdr[ehdr.e_shstrndx].sh_offset,
+ SEEK_SET) != -1)
+ sample_len = read (fd, strings,
+ shdr[ehdr.e_shstrndx].sh_size);
+ else
+ sample_len = -1;
+#endif
+ if (sample_len == shdr[ehdr.e_shstrndx].sh_size)
+ while (nshdr-- > 0)
+ if (strcmp (strings + shdr[nshdr].sh_name,
+ ".interp") == 0 &&
+ shdr[nshdr].sh_type == SHT_NOBITS)
+ {
+ dynamic_nobits++;
+ break;
+ }
+ free (strings);
+ }
+ }
+ free (shdr);
+ }
+
nphdr = ehdr.e_phnum;
phdr = (Elf64_Phdr *) malloc (nphdr * ehdr.e_phentsize);
if (phdr != NULL)
@@ -4858,8 +4954,15 @@ shell_execve (command, args, env)
{
close (fd);
errno = i;
- sys_error ("%s: %s: bad ELF interpreter", command,
- interp);
+ if (dynamic_nobits > 0)
+ {
+ sys_error ("%s: bad ELF interpreter", command);
+ }
+ else
+ {
+ sys_error ("%s: %s: bad ELF interpreter", command,
+ interp);
+ }
free (interp);
return (EX_NOEXEC);
}

15
bash.spec
View File

@ -74,6 +74,9 @@ Patch118: bash-tty-tests.patch
# 518644, alloc memory for key in associative array creation
Patch122: bash-4.0-key_alloc.patch
# 484809, check if interp section is NOBITS
Patch123: bash-4.0-nobits.patch
Requires(post): ncurses-libs
BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
@ -154,6 +157,7 @@ This package contains documentation files for %{name}.
#%patch120 -p1 -b .no_debug_output
#%patch121 -p1 -b .pipelines_handling
%patch122 -p1 -b .key_alloc
%patch123 -p1 -b .nobits
echo %{version} > _distribution
echo %{release} > _patchlevel
@ -161,8 +165,11 @@ echo %{release} > _patchlevel
%build
autoconf
%configure --with-bash-malloc=no --with-afs
make "CPPFLAGS=-D_GNU_SOURCE `getconf LFS_CFLAGS`"
#make "CPPFLAGS=-DUSE_POSIX_GLOB_LIBRARY -D_GNU_SOURCE `getconf LFS_CFLAGS`"
# Recycles pids is neccessary. When bash's last fork's pid was X
# and new fork's pid is also X, bash has to wait for this same pid.
# Without Recycles pids bash will not wait.
make "CPPFLAGS=-D_GNU_SOURCE -DRECYCLES_PIDS `getconf LFS_CFLAGS`"
%check
make check
@ -317,6 +324,10 @@ fi
#%doc doc/*.ps doc/*.0 doc/*.html doc/article.txt
%changelog
* Fri Sep 04 2009 Roman Rakus <rrakus@redhat.com> - 4.0.28-3
- check if interp section is NOBITS
- define Recycles pids
* Wed Aug 26 2009 Roman Rakus <rrakus@redhat.com> - 4.0.28-2
- alloc memory for key in creation associative array (#518644)