2 files changed, 29 insertions, 1 deletions

diff --git a/fs/Kconfig.binfmt b/fs/Kconfig.binfmt
index 801db1341811..ce9fb3fbfae4 100644
--- a/fs/Kconfig.binfmt
+++ b/fs/Kconfig.binfmt
@@ -40,6 +40,28 @@ config BINFMT_ELF_FDPIC
 
           It is also possible to run FDPIC ELF binaries on MMU linux also.
 
+config CORE_DUMP_DEFAULT_ELF_HEADERS
+        bool "Write ELF core dumps with partial segments"
+        default n
+        depends on BINFMT_ELF
+        help
+          ELF core dump files describe each memory mapping of the crashed
+          process, and can contain or omit the memory contents of each one.
+          The contents of an unmodified text mapping are omitted by default.
+
+          For an unmodified text mapping of an ELF object, including just
+          the first page of the file in a core dump makes it possible to
+          identify the build ID bits in the file, without paying the i/o
+          cost and disk space to dump all the text.  However, versions of
+          GDB before 6.7 are confused by ELF core dump files in this format.
+
+          The core dump behavior can be controlled per process using
+          the /proc/PID/coredump_filter pseudo-file; this setting is
+          inherited.  See Documentation/filesystems/proc.txt for details.
+
+          This config option changes the default setting of coredump_filter
+          seen at boot time.  If unsure, say N.
+
 config BINFMT_FLAT
         bool "Kernel support for flat binaries"
         depends on !MMU && (!FRV || BROKEN)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 017cc914ef1f..f52dbd3587a7 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -411,7 +411,13 @@ extern int get_dumpable(struct mm_struct *mm);
         (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
 #define MMF_DUMP_FILTER_DEFAULT \
         ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\
-         (1 << MMF_DUMP_HUGETLB_PRIVATE))
+         (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF)
+
+#ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
+# define MMF_DUMP_MASK_DEFAULT_ELF      (1 << MMF_DUMP_ELF_HEADERS)
+#else
+# define MMF_DUMP_MASK_DEFAULT_ELF      0
+#endif
 
 struct sighand_struct {
         atomic_t                count;