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| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2024-11-08 20:13:31 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2024-11-09 19:01:35 +0300 |
| commit | 2fdb05dc0931250574f0cb0ebeb5ed8e20f4a889 (patch) | |
| tree | 9d16fa0c4294a128a9331e3a9fe50d318213053f /drivers/fpga/fpga-bridge.c | |
| parent | c968fd23c68e9929ab6cad4faffc8ea603e98e5d (diff) | |
| download | linux-2fdb05dc0931250574f0cb0ebeb5ed8e20f4a889.tar.xz | |
NFSv4.0: Fix a use-after-free problem in the asynchronous open()
Yang Erkun reports that when two threads are opening files at the same
time, and are forced to abort before a reply is seen, then the call to
nfs_release_seqid() in nfs4_opendata_free() can result in a
use-after-free of the pointer to the defunct rpc task of the other
thread.
The fix is to ensure that if the RPC call is aborted before the call to
nfs_wait_on_sequence() is complete, then we must call nfs_release_seqid()
in nfs4_open_release() before the rpc_task is freed.
Reported-by: Yang Erkun <yangerkun@huawei.com>
Fixes: 24ac23ab88df ("NFSv4: Convert open() into an asynchronous RPC call")
Reviewed-by: Yang Erkun <yangerkun@huawei.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'drivers/fpga/fpga-bridge.c')
0 files changed, 0 insertions, 0 deletions