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| author | Federico Vaga <federico.vaga@gmail.com> | 2011-10-29 09:45:39 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 08:52:40 -0800 |
| commit | 261dbf437bce1d339c358e6566925905e49c13fe (patch) | |
| tree | 0550c193a8ad97b70d58d6a87f953033fe3a7ab7 /drivers/hid | |
| parent | 9649803f2de0d2e77bdd7c5e1cbd4a7b3833f1e8 (diff) | |
| download | kernel_samsung_aries-261dbf437bce1d339c358e6566925905e49c13fe.zip kernel_samsung_aries-261dbf437bce1d339c358e6566925905e49c13fe.tar.gz kernel_samsung_aries-261dbf437bce1d339c358e6566925905e49c13fe.tar.bz2 | |
Staging: comedi: fix mmap_count
commit df30b21cb0eed5ba8a8e0cdfeebc66ba8cde821d upstream.
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 <rubini@gnudd.com>
Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/hid')
0 files changed, 0 insertions, 0 deletions