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path: root/fs/binfmt_elf_fdpic.c
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Diffstat (limited to 'fs/binfmt_elf_fdpic.c')
-rw-r--r--fs/binfmt_elf_fdpic.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 692e2a1fd2bb..6a56dea13876 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -835,6 +835,9 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
if (phdr->p_vaddr >= seg->p_vaddr &&
phdr->p_vaddr + phdr->p_memsz <=
seg->p_vaddr + seg->p_memsz) {
+ Elf32_Dyn __user *dyn;
+ Elf32_Sword d_tag;
+
params->dynamic_addr =
(phdr->p_vaddr - seg->p_vaddr) +
seg->addr;
@@ -847,8 +850,9 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
goto dynamic_error;
tmp = phdr->p_memsz / sizeof(Elf32_Dyn);
- if (((Elf32_Dyn *)
- params->dynamic_addr)[tmp - 1].d_tag != 0)
+ dyn = (Elf32_Dyn __user *)params->dynamic_addr;
+ __get_user(d_tag, &dyn[tmp - 1].d_tag);
+ if (d_tag != 0)
goto dynamic_error;
break;
}