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| author | Ingo Molnar <mingo@elte.hu> | 2009-01-10 12:04:41 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-10 12:04:41 +0100 |
| commit | b17304245f0db0ac69b795c411407808f3f2796d (patch) | |
| tree | 63ed3915d9295bd08f640bf25c322064ba787fad /fs/binfmt_elf.c | |
| parent | 889c92d21db40be0b7d22a59395060237895bb85 (diff) | |
| parent | 9a100a4464917b5ffff3a8ce1c2758088fd9bb32 (diff) | |
| download | lwn-b17304245f0db0ac69b795c411407808f3f2796d.tar.gz lwn-b17304245f0db0ac69b795c411407808f3f2796d.zip | |
Merge branch 'linus' into x86/setup-lzma
Conflicts:
init/do_mounts_rd.c
Diffstat (limited to 'fs/binfmt_elf.c')
| -rw-r--r-- | fs/binfmt_elf.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index c41fa2af7677..e3ff2b9e602f 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -152,8 +152,10 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec, elf_addr_t __user *sp; elf_addr_t __user *u_platform; elf_addr_t __user *u_base_platform; + elf_addr_t __user *u_rand_bytes; const char *k_platform = ELF_PLATFORM; const char *k_base_platform = ELF_BASE_PLATFORM; + unsigned char k_rand_bytes[16]; int items; elf_addr_t *elf_info; int ei_index = 0; @@ -196,6 +198,15 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec, return -EFAULT; } + /* + * Generate 16 random bytes for userspace PRNG seeding. + */ + get_random_bytes(k_rand_bytes, sizeof(k_rand_bytes)); + u_rand_bytes = (elf_addr_t __user *) + STACK_ALLOC(p, sizeof(k_rand_bytes)); + if (__copy_to_user(u_rand_bytes, k_rand_bytes, sizeof(k_rand_bytes))) + return -EFAULT; + /* Create the ELF interpreter info */ elf_info = (elf_addr_t *)current->mm->saved_auxv; /* update AT_VECTOR_SIZE_BASE if the number of NEW_AUX_ENT() changes */ @@ -228,6 +239,7 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec, NEW_AUX_ENT(AT_GID, cred->gid); NEW_AUX_ENT(AT_EGID, cred->egid); NEW_AUX_ENT(AT_SECURE, security_bprm_secureexec(bprm)); + NEW_AUX_ENT(AT_RANDOM, (elf_addr_t)(unsigned long)u_rand_bytes); NEW_AUX_ENT(AT_EXECFN, bprm->exec); if (k_platform) { NEW_AUX_ENT(AT_PLATFORM, |