[Bug 206017] mips binary has segments with different permissions in same page

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Fri Jan 8 00:47:07 UTC 2016


            Bug ID: 206017
           Summary: mips binary has segments with different permissions in
                    same page
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: mips
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: misc
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: emaste at freebsd.org

MIPS binary has a PT_DYNAMIC segment with RWE perms in the same page as PT_NOTE
with R only; rtld cannot actually accommodate this.

volta% readelf -l sh

Elf file type is EXEC (Executable file)
Entry point 0x4037e0
There are 8 program headers, starting at offset 52

Program Headers:
  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
  PHDR           0x000034 0x00400034 0x00400034 0x00100 0x00100 R E 0x4
  INTERP         0x000134 0x00400134 0x00400134 0x00015 0x00015 R   0x1
      [Requesting program interpreter: /libexec/ld-elf.so.1]
  LOPROC+0       0x00017c 0x0040017c 0x0040017c 0x00018 0x00018 R   0x4
  LOAD           0x000000 0x00400000 0x00400000 0x2b42c 0x2b42c R E 0x10000
  LOAD           0x02b42c 0x0043b42c 0x0043b42c 0x00b68 0x01bb8 RW  0x10000
  DYNAMIC        0x000194 0x00400194 0x00400194 0x000f8 0x000f8 RWE 0x4
  NOTE           0x00014c 0x0040014c 0x0040014c 0x00030 0x00030 R   0x4
  NULL           0x000000 0x00000000 0x00000000 0x00000 0x00000     0x4

 Section to Segment mapping:
  Segment Sections...
   01     .interp 
   02     .reginfo 
   03     .interp .note.tag .reginfo .dynamic .hash .dynsym .dynstr
.gnu.version .gnu.version_r .init .text .MIPS.stubs .fini .rodata .eh_frame 
   04     .ctors .dtors .jcr .data.rel.ro .data .rld_map .got .sdata .bss 
   05     .dynamic 
   06     .note.tag 

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