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| author | Maurizio Lombardi <mlombard@redhat.com> | 2021-07-02 11:11:21 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-07-05 11:14:44 +0300 |
| commit | 0755d3be2d9bb6ea38598ccd30d6bbaa1a5c3a50 (patch) | |
| tree | 4bedd822909aa74d9f533f0dcb59aa428357afce /drivers/nvme | |
| parent | 585af8ede7035379b712cacca80e9c2c34853d4b (diff) | |
| download | linux-0755d3be2d9bb6ea38598ccd30d6bbaa1a5c3a50.tar.xz | |
nvme-tcp: can't set sk_user_data without write_lock
The sk_user_data pointer is supposed to be modified only while
holding the write_lock "sk_callback_lock", otherwise
we could race with other threads and crash the kernel.
we can't take the write_lock in nvmet_tcp_state_change()
because it would cause a deadlock, but the release_work queue
will set the pointer to NULL later so we can simply remove
the assignment.
Fixes: b5332a9f3f3d ("nvmet-tcp: fix incorrect locking in state_change sk callback")
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/target/tcp.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index d8aceef83284..07ee347ea3f3 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -1497,7 +1497,6 @@ static void nvmet_tcp_state_change(struct sock *sk) case TCP_CLOSE_WAIT: case TCP_CLOSE: /* FALLTHRU */ - sk->sk_user_data = NULL; nvmet_tcp_schedule_release_queue(queue); break; default: |