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authorOllie Wild <aaw@google.com>2007-07-19 12:48:16 +0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-19 21:04:45 +0400
commitb6a2fea39318e43fee84fa7b0b90d68bed92d2ba (patch)
treec9c3619cb2730b5c10c7427b837146bce3d69156 /fs/binfmt_script.c
parentbdf4c48af20a3b0f01671799ace345e3d49576da (diff)
downloadlinux-b6a2fea39318e43fee84fa7b0b90d68bed92d2ba.tar.xz
mm: variable length argument support
Remove the arg+env limit of MAX_ARG_PAGES by copying the strings directly from the old mm into the new mm. We create the new mm before the binfmt code runs, and place the new stack at the very top of the address space. Once the binfmt code runs and figures out where the stack should be, we move it downwards. It is a bit peculiar in that we have one task with two mm's, one of which is inactive. [a.p.zijlstra@chello.nl: limit stack size] Signed-off-by: Ollie Wild <aaw@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: <linux-arch@vger.kernel.org> Cc: Hugh Dickins <hugh@veritas.com> [bunk@stusta.de: unexport bprm_mm_init] Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/binfmt_script.c')
-rw-r--r--fs/binfmt_script.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/binfmt_script.c b/fs/binfmt_script.c
index 304c88544d89..4d0e0f6d3273 100644
--- a/fs/binfmt_script.c
+++ b/fs/binfmt_script.c
@@ -67,7 +67,9 @@ static int load_script(struct linux_binprm *bprm,struct pt_regs *regs)
* This is done in reverse order, because of how the
* user environment and arguments are stored.
*/
- remove_arg_zero(bprm);
+ retval = remove_arg_zero(bprm);
+ if (retval)
+ return retval;
retval = copy_strings_kernel(1, &bprm->interp, bprm);
if (retval < 0) return retval;
bprm->argc++;