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-rw-r--r--core/glibc/file-truncated-while-reading-soname-after-patchelf.patch85
1 files changed, 85 insertions, 0 deletions
diff --git a/core/glibc/file-truncated-while-reading-soname-after-patchelf.patch b/core/glibc/file-truncated-while-reading-soname-after-patchelf.patch
new file mode 100644
index 00000000..4c21284b
--- /dev/null
+++ b/core/glibc/file-truncated-while-reading-soname-after-patchelf.patch
@@ -0,0 +1,85 @@
+[PATCH] ldconfig: file truncated while reading soname after patchelf [BZ #23964]
+
+The way loadaddr is computed from the first LOAD segment in process_elf_file
+assumes .dynstr is also contained in that segment. That is not necessarily
+true, especially for libraries that have been touched by patchelf.
+
+With this patch, the address read from the dynamic segment is checked against
+all applicable segments instead of only the first one.
+
+ [BZ #23964]
+ * elf/readelflib.c: Fix resolving of loadaddr for .dynstr vaddr.
+---
+ elf/readelflib.c | 33 ++++++++++++++++-----------------
+ 1 file changed, 16 insertions(+), 17 deletions(-)
+
+diff --git a/elf/readelflib.c b/elf/readelflib.c
+index 5a1e2dc2df..bc1195c175 100644
+--- a/elf/readelflib.c
++++ b/elf/readelflib.c
+@@ -98,11 +98,6 @@ process_elf_file (const char *file_name, const char *lib, int *flag,
+
+ switch (segment->p_type)
+ {
+- case PT_LOAD:
+- if (loadaddr == (ElfW(Addr)) -1)
+- loadaddr = segment->p_vaddr - segment->p_offset;
+- break;
+-
+ case PT_DYNAMIC:
+ if (dynamic_addr)
+ error (0, 0, _("more than one dynamic segment\n"));
+@@ -176,11 +171,6 @@ process_elf_file (const char *file_name, const char *lib, int *flag,
+ }
+
+ }
+- if (loadaddr == (ElfW(Addr)) -1)
+- {
+- /* Very strange. */
+- loadaddr = 0;
+- }
+
+ /* Now we can read the dynamic sections. */
+ if (dynamic_size == 0)
+@@ -190,22 +180,31 @@ process_elf_file (const char *file_name, const char *lib, int *flag,
+ check_ptr (dynamic_segment);
+
+ /* Find the string table. */
+- dynamic_strings = NULL;
+ for (dyn_entry = dynamic_segment; dyn_entry->d_tag != DT_NULL;
+ ++dyn_entry)
+ {
+ check_ptr (dyn_entry);
+ if (dyn_entry->d_tag == DT_STRTAB)
+- {
+- dynamic_strings = (char *) (file_contents + dyn_entry->d_un.d_val - loadaddr);
+- check_ptr (dynamic_strings);
+- break;
+- }
++ break;
+ }
+
+- if (dynamic_strings == NULL)
++ for (i = 0, segment = elf_pheader;i < elf_header->e_phnum; i++, segment++)
++ {
++ ElfW(Addr) vaddr = dyn_entry->d_un.d_ptr;
++ if (segment->p_type == PT_LOAD &&
++ vaddr >= segment->p_vaddr &&
++ vaddr < segment->p_vaddr + segment->p_filesz)
++ {
++ loadaddr = segment->p_vaddr - segment->p_offset;
++ break;
++ }
++ }
++ if (loadaddr == (ElfW(Addr)) -1)
+ return 1;
+
++ dynamic_strings = (char *) (file_contents + dyn_entry->d_un.d_val - loadaddr);
++ check_ptr (dynamic_strings);
++
+ /* Now read the DT_NEEDED and DT_SONAME entries. */
+ for (dyn_entry = dynamic_segment; dyn_entry->d_tag != DT_NULL;
+ ++dyn_entry)
+--
+2.19.2
+