diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-01-11 16:09:20 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-01-11 16:09:20 -0800 |
| commit | fa6e49a2497cb4298d81c0d384c1ade8bcf1f0a3 (patch) | |
| tree | f57b43daf2a64a79d39d9c76ca6f8474ed8052b9 /net/lapb/lapb_iface.c | |
| parent | 749e1c8ba98f98b5657e713b10e743581b5d32b2 (diff) | |
Handle two threads both trying to expand their stack simultaneously.
We had all the locking right, but we didn't check whether one of the
threads now no longer needed to expand, so we could incorrectly _shrink_
the stack in the other thread instead (not only causing segfaults, but
since we didn't do a proper unmap, we'd possibly leak pages too).
So re-check the need for expand after getting the lock.
Noticed by Paul Starzetz.
Diffstat (limited to 'net/lapb/lapb_iface.c')
0 files changed, 0 insertions, 0 deletions