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authorOleg Nesterov <oleg@redhat.com>2010-11-30 20:56:02 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2010-11-30 17:56:38 -0800
commit114279be2120a916e8a04feeb2ac976a10016f2f (patch)
tree866a5dfab411d18941d58f8796edab6da760213e /include
parent3c77f845722158206a7209c45ccddc264d19319c (diff)
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exec: copy-and-paste the fixes into compat_do_execve() paths
Note: this patch targets 2.6.37 and tries to be as simple as possible. That is why it adds more copy-and-paste horror into fs/compat.c and uglifies fs/exec.c, this will be cleanuped later. compat_copy_strings() plays with bprm->vma/mm directly and thus has two problems: it lacks the RLIMIT_STACK check and argv/envp memory is not visible to oom killer. Export acct_arg_size() and get_arg_page(), change compat_copy_strings() to use get_arg_page(), change compat_do_execve() to do acct_arg_size(0) as do_execve() does. Add the fatal_signal_pending/cond_resched checks into compat_count() and compat_copy_strings(), this matches the code in fs/exec.c and certainly makes sense. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/binfmts.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h
index 7c87796d20d..64a7114a939 100644
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -60,6 +60,10 @@ struct linux_binprm{
unsigned long loader, exec;
};
+extern void acct_arg_size(struct linux_binprm *bprm, unsigned long pages);
+extern struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos,
+ int write);
+
#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)