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Diffstat (limited to 'kernel/fs/binfmt_elf.c')
-rw-r--r--kernel/fs/binfmt_elf.c26
1 files changed, 18 insertions, 8 deletions
diff --git a/kernel/fs/binfmt_elf.c b/kernel/fs/binfmt_elf.c
index cd46e4158..3a93755e8 100644
--- a/kernel/fs/binfmt_elf.c
+++ b/kernel/fs/binfmt_elf.c
@@ -35,6 +35,7 @@
#include <linux/utsname.h>
#include <linux/coredump.h>
#include <linux/sched.h>
+#include <linux/dax.h>
#include <asm/uaccess.h>
#include <asm/param.h>
#include <asm/page.h>
@@ -487,7 +488,7 @@ static inline int arch_elf_pt_proc(struct elfhdr *ehdr,
}
/**
- * arch_check_elf() - check a PT_LOPROC..PT_HIPROC ELF program header
+ * arch_check_elf() - check an ELF executable
* @ehdr: The main ELF header
* @has_interp: True if the ELF has an interpreter, else false.
* @state: Architecture-specific state preserved throughout the process
@@ -759,16 +760,16 @@ static int load_elf_binary(struct linux_binprm *bprm)
*/
would_dump(bprm, interpreter);
- retval = kernel_read(interpreter, 0, bprm->buf,
- BINPRM_BUF_SIZE);
- if (retval != BINPRM_BUF_SIZE) {
+ /* Get the exec headers */
+ retval = kernel_read(interpreter, 0,
+ (void *)&loc->interp_elf_ex,
+ sizeof(loc->interp_elf_ex));
+ if (retval != sizeof(loc->interp_elf_ex)) {
if (retval >= 0)
retval = -EIO;
goto out_free_dentry;
}
- /* Get the exec headers */
- loc->interp_elf_ex = *((struct elfhdr *)bprm->buf);
break;
}
elf_ppnt++;
@@ -1236,6 +1237,15 @@ static unsigned long vma_dump_size(struct vm_area_struct *vma,
if (vma->vm_flags & VM_DONTDUMP)
return 0;
+ /* support for DAX */
+ if (vma_is_dax(vma)) {
+ if ((vma->vm_flags & VM_SHARED) && FILTER(DAX_SHARED))
+ goto whole;
+ if (!(vma->vm_flags & VM_SHARED) && FILTER(DAX_PRIVATE))
+ goto whole;
+ return 0;
+ }
+
/* Hugetlb memory check */
if (vma->vm_flags & VM_HUGETLB) {
if ((vma->vm_flags & VM_SHARED) && FILTER(HUGETLB_SHARED))
@@ -1530,7 +1540,7 @@ static int fill_files_note(struct memelfnote *note)
file = vma->vm_file;
if (!file)
continue;
- filename = d_path(&file->f_path, name_curpos, remaining);
+ filename = file_path(file, name_curpos, remaining);
if (IS_ERR(filename)) {
if (PTR_ERR(filename) == -ENAMETOOLONG) {
vfree(data);
@@ -1540,7 +1550,7 @@ static int fill_files_note(struct memelfnote *note)
continue;
}
- /* d_path() fills at the end, move name down */
+ /* file_path() fills at the end, move name down */
/* n = strlen(filename) + 1: */
n = (name_curpos + remaining) - filename;
remaining = filename - name_curpos;