path: root/mm
diff options
authorHugh Dickins <>2009-04-16 21:58:12 +0100
committerLinus Torvalds <>2009-04-16 14:41:25 -0700
commit05fa199d45c54a9bda7aa3ae6537253d6f097aa9 (patch)
treecfdcdd04bfcef7d0dcb47fad93ba8fa676349dd3 /mm
parent05f54c13cd0c33694eec39a265475c5d6cf223cf (diff)
mm: pass correct mm when growing stack
Tetsuo Handa reports seeing the WARN_ON(current->mm == NULL) in security_vm_enough_memory(), when do_execve() is touching the target mm's stack, to set up its args and environment. Yes, a UMH_NO_WAIT or UMH_WAIT_PROC call_usermodehelper() spawns an mm-less kernel thread to do the exec. And in any case, that vm_enough_memory check when growing stack ought to be done on the target mm, not on the execer's mm (though apart from the warning, it only makes a slight tweak to OVERCOMMIT_NEVER behaviour). Reported-by: Tetsuo Handa <> Signed-off-by: Hugh Dickins <> Cc: Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'mm')
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 4a3841186c11..3303d1ba8e87 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1575,7 +1575,7 @@ static int acct_stack_growth(struct vm_area_struct *vma, unsigned long size, uns
* Overcommit.. This must be the final test, as it will
* update security statistics.
- if (security_vm_enough_memory(grow))
+ if (security_vm_enough_memory_mm(mm, grow))
return -ENOMEM;
/* Ok, everything looks good - let it rip */