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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-09-25 21:55:03 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-09-26 18:22:04 +0200 |
| commit | 255129d1e9ca0ed3d69d5517fae3e03d7ab4b806 (patch) | |
| tree | e3dedbffebd4f0e15da97684500296c9bc4d3d6a /security | |
| parent | lguest example launcher truncates block device file to 0 length on problems (diff) | |
| download | linux-255129d1e9ca0ed3d69d5517fae3e03d7ab4b806.tar.xz linux-255129d1e9ca0ed3d69d5517fae3e03d7ab4b806.zip | |
NLM: Fix a circular lock dependency in lockd
The problem is that the garbage collector for the 'host' structures
nlm_gc_hosts(), holds nlm_host_mutex while calling down to
nlmsvc_mark_resources, which, eventually takes the file->f_mutex.
We cannot therefore call nlmsvc_lookup_host() from within
nlmsvc_create_block, since the caller will already hold file->f_mutex, so
the attempt to grab nlm_host_mutex may deadlock.
Fix the problem by calling nlmsvc_lookup_host() outside the file->f_mutex.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions