| commit | c0253eec2a8e1140dd9672a1efe095cdcf5811d0 | [log] [tgz] |
|---|---|---|
| author | Alan Cox <alan@redhat.com> | Thu Jan 15 13:30:25 2009 +0000 |
| committer | Linus Torvalds <torvalds@linux-foundation.org> | Thu Jan 15 12:48:35 2009 -0800 |
| tree | c48dc5283ca4f01005295a97a28e532818aedce6 | |
| parent | 5393f780277165f282a37ed82dd878159ec9dad5 [diff] |
tty: Fix race in the flush for some ldiscs If you issue an ioctl to flush a tty as the line discipline is changing or otherwise unplugged you can get a crash. The bug is very old but the rest of the BKL lock dropping and some very "good" luck on Ingo's part caught an example. Use the correct ldisc_ref form so that we wait for the ldisc change to complete and then flush Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>