diff options
| author | Russell King <rmk+kernel@armlinux.org.uk> | 2017-09-28 12:16:33 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-10-03 00:16:29 +0200 |
| commit | 1bb078330b4f0836b5b12365cd8bf68d5f3bbff8 (patch) | |
| tree | 0a15f41ace12c4b308ef6cc57e5aa3be0019e05d /fs/binfmt_elf.c | |
| parent | Merge branch 'xip_zdata' of http://git.linaro.org/people/nicolas.pitre/linux ... (diff) | |
| parent | binfmt_elf_fdpic: fix crash on MMU system with dynamic binaries (diff) | |
| download | linux-1bb078330b4f0836b5b12365cd8bf68d5f3bbff8.tar.xz linux-1bb078330b4f0836b5b12365cd8bf68d5f3bbff8.zip | |
Merge branch 'fdpic' of http://git.linaro.org/people/nicolas.pitre/linux into devel-stable
This series provides the needed changes to suport the ELF_FDPIC binary
format on ARM. Both MMU and non-MMU systems are supported. This format
has many advantages over the BFLT format used on MMU-less systems, such
as being real ELF that can be parsed by standard tools, can support
shared dynamic libs, etc.
Diffstat (limited to 'fs/binfmt_elf.c')
| -rw-r--r-- | fs/binfmt_elf.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 73b01e474fdc..e4f7ef8294ac 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -51,6 +51,11 @@ #define user_siginfo_t siginfo_t #endif +/* That's for binfmt_elf_fdpic to deal with */ +#ifndef elf_check_fdpic +#define elf_check_fdpic(ex) false +#endif + static int load_elf_binary(struct linux_binprm *bprm); static unsigned long elf_map(struct file *, unsigned long, struct elf_phdr *, int, int, unsigned long); @@ -541,7 +546,8 @@ static unsigned long load_elf_interp(struct elfhdr *interp_elf_ex, if (interp_elf_ex->e_type != ET_EXEC && interp_elf_ex->e_type != ET_DYN) goto out; - if (!elf_check_arch(interp_elf_ex)) + if (!elf_check_arch(interp_elf_ex) || + elf_check_fdpic(interp_elf_ex)) goto out; if (!interpreter->f_op->mmap) goto out; @@ -718,6 +724,8 @@ static int load_elf_binary(struct linux_binprm *bprm) goto out; if (!elf_check_arch(&loc->elf_ex)) goto out; + if (elf_check_fdpic(&loc->elf_ex)) + goto out; if (!bprm->file->f_op->mmap) goto out; @@ -817,7 +825,8 @@ static int load_elf_binary(struct linux_binprm *bprm) if (memcmp(loc->interp_elf_ex.e_ident, ELFMAG, SELFMAG) != 0) goto out_free_dentry; /* Verify the interpreter has a valid arch */ - if (!elf_check_arch(&loc->interp_elf_ex)) + if (!elf_check_arch(&loc->interp_elf_ex) || + elf_check_fdpic(&loc->interp_elf_ex)) goto out_free_dentry; /* Load the interpreter program headers */ @@ -1190,6 +1199,8 @@ static int load_elf_library(struct file *file) if (elf_ex.e_type != ET_EXEC || elf_ex.e_phnum > 2 || !elf_check_arch(&elf_ex) || !file->f_op->mmap) goto out; + if (elf_check_fdpic(&elf_ex)) + goto out; /* Now read in all of the header information */ |