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| author | Federico Vaga <[email protected]> | 2011-10-29 07:45:39 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2011-11-27 02:34:14 +0000 |
| commit | df30b21cb0eed5ba8a8e0cdfeebc66ba8cde821d (patch) | |
| tree | 5bd4f9b7050691a53abfff32f1218cadd4425a2b /fs/btrfs/async-thread.c | |
| parent | staging: comedi: fix oops for USB DAQ devices. (diff) | |
| download | kernel-df30b21cb0eed5ba8a8e0cdfeebc66ba8cde821d.tar.gz kernel-df30b21cb0eed5ba8a8e0cdfeebc66ba8cde821d.zip | |
Staging: comedi: fix mmap_count
In comedi_fops, mmap_count is decremented at comedi_vm_ops->close but
it is not incremented at comedi_vm_ops->open. This may result in a negative
counter. The patch introduces the open method to keep the counter
consistent.
The bug was triggerd by this sample code:
mmap(0, ...., comedi_fd);
fork();
exit(0);
Acked-by: Alessandro Rubini <[email protected]>
Signed-off-by: Federico Vaga <[email protected]>
Cc: stable <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'fs/btrfs/async-thread.c')
0 files changed, 0 insertions, 0 deletions