@@ -250,7 +250,7 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
NEW_AUX_ENT(AT_PHENT, sizeof(struct elf_phdr));
NEW_AUX_ENT(AT_PHNUM, exec->e_phnum);
NEW_AUX_ENT(AT_BASE, interp_load_addr);
- NEW_AUX_ENT(AT_FLAGS, 0);
+ NEW_AUX_ENT(AT_FLAGS, bprm->fmt_flags);
NEW_AUX_ENT(AT_ENTRY, exec->e_entry);
NEW_AUX_ENT(AT_UID, from_kuid_munged(cred->user_ns, cred->uid));
NEW_AUX_ENT(AT_EUID, from_kuid_munged(cred->user_ns, cred->euid));
@@ -647,7 +647,7 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
NEW_AUX_ENT(AT_PHENT, sizeof(struct elf_phdr));
NEW_AUX_ENT(AT_PHNUM, exec_params->hdr.e_phnum);
NEW_AUX_ENT(AT_BASE, interp_params->elfhdr_addr);
- NEW_AUX_ENT(AT_FLAGS, 0);
+ NEW_AUX_ENT(AT_FLAGS, bprm->fmt_flags);
NEW_AUX_ENT(AT_ENTRY, exec_params->entry_addr);
NEW_AUX_ENT(AT_UID, (elf_addr_t) from_kuid_munged(cred->user_ns, cred->uid));
NEW_AUX_ENT(AT_EUID, (elf_addr_t) from_kuid_munged(cred->user_ns, cred->euid));
@@ -149,6 +149,8 @@ static int load_misc_binary(struct linux_binprm *bprm)
if (!fmt)
return retval;
+ bprm->fmt_flags = fmt->flags;
+
/* Need to be able to load the file after exec */
retval = -ENOENT;
if (bprm->interp_flags & BINPRM_FLAGS_PATH_INACCESSIBLE)
@@ -60,7 +60,7 @@ struct linux_binprm {
different for binfmt_{misc,script} */
unsigned interp_flags;
unsigned interp_data;
- unsigned long loader, exec;
+ unsigned long loader, exec, fmt_flags;
struct rlimit rlim_stack; /* Saved RLIMIT_STACK used during exec. */
It can be useful to the interpreter to know which flags are in use. For instance, knowing if the preserve-argv[0] is in use would allow to skip the pathname argument. This patch uses an unused auxiliary vector, AT_FLAGS, to pass the content of the binfmt flags (bits for P, F, C, O, ...). Signed-off-by: Laurent Vivier <laurent@vivier.eu> --- fs/binfmt_elf.c | 2 +- fs/binfmt_elf_fdpic.c | 2 +- fs/binfmt_misc.c | 2 ++ include/linux/binfmts.h | 2 +- 4 files changed, 5 insertions(+), 3 deletions(-)