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| author | Andy Adamson <andros@citi.umich.edu> | 2006-03-20 19:44:26 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-03-20 19:44:26 +0100 |
| commit | 8dc7c3115b611c00006eac3ee5b108296432aab7 (patch) | |
| tree | be44c59907cbdcb6fdf46d0ad9cc140af757acfc /fs/lockd/svcsubs.c | |
| parent | locks: remove unused posix_block_lock (diff) | |
| download | linux-8dc7c3115b611c00006eac3ee5b108296432aab7.tar.xz linux-8dc7c3115b611c00006eac3ee5b108296432aab7.zip | |
locks,lockd: fix race in nlmsvc_testlock
posix_test_lock() returns a pointer to a struct file_lock which is unprotected
and can be removed while in use by the caller. Move the conflicting lock from
the return to a parameter, and copy the conflicting lock.
In most cases the caller ends up putting the copy of the conflicting lock on
the stack. On i386, sizeof(struct file_lock) appears to be about 100 bytes.
We're assuming that's reasonable.
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/lockd/svcsubs.c')
0 files changed, 0 insertions, 0 deletions