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authorHugh Dickins <hugh@veritas.com>2009-04-16 16:58:12 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-16 17:41:25 -0400
commit05fa199d45c54a9bda7aa3ae6537253d6f097aa9 (patch)
treecfdcdd04bfcef7d0dcb47fad93ba8fa676349dd3 /mm/Kconfig.debug
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 <penguin-kernel@i-love.sakura.ne.jp> Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/Kconfig.debug')
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