Messages in this thread | | | Date | Wed, 15 Oct 1997 14:13:46 -0400 | From | Bill Hawes <> | Subject | Re: possible memory leak in exec.c, pre-10 2.0.31 |
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Ingo Molnar wrote: > tried to write exploit code for this (possible) memory leak, but failed. > But it looks like definit weak code? The patch is tested otherwise.
Hi mingo, As long as you're working in fs/exec.c, you might want to take a look at a low probability but massive memory leak in exec_mmap. If a clone task with mm->count > 1 blocks while setting up a new mm, the other clone(s) might exit, leaving the old mm->count at 1. But the old mm is unconditionally abandoned, leaking lots of memory, inode counts, etc.
I changed 2.1.xx a while back to avoid this, but it might be worthwile to check for the problem in 2.0.xx. (Or at least put in a printk to see if it ever happens.)
Regards, Bill
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