diff options
| author | Maurizio Lombardi <mlombard@redhat.com> | 2021-10-15 11:26:34 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-10-26 11:41:29 +0300 |
| commit | 926245c7d22271307606c88b1fbb2539a8550e94 (patch) | |
| tree | 5381a629670908a2e13461f6160d67563260518c /drivers/nvme | |
| parent | 9fbfabfda25d8774c5a08634fdd2da000a924890 (diff) | |
| download | linux-926245c7d22271307606c88b1fbb2539a8550e94.tar.xz | |
nvmet-tcp: fix a memory leak when releasing a queue
page_frag_free() won't completely release the memory
allocated for the commands, the cache page must be explicitly
freed by calling __page_frag_cache_drain().
This bug can be easily reproduced by repeatedly
executing the following command on the initiator:
$echo 1 > /sys/devices/virtual/nvme-fabrics/ctl/nvme0/reset_controller
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: John Meneghini <jmeneghi@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/target/tcp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index 07ee347ea3f3..c33a0464346f 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -1428,6 +1428,7 @@ static void nvmet_tcp_uninit_data_in_cmds(struct nvmet_tcp_queue *queue) static void nvmet_tcp_release_queue_work(struct work_struct *w) { + struct page *page; struct nvmet_tcp_queue *queue = container_of(w, struct nvmet_tcp_queue, release_work); @@ -1447,6 +1448,8 @@ static void nvmet_tcp_release_queue_work(struct work_struct *w) nvmet_tcp_free_crypto(queue); ida_simple_remove(&nvmet_tcp_queue_ida, queue->idx); + page = virt_to_head_page(queue->pf_cache.va); + __page_frag_cache_drain(page, queue->pf_cache.pagecnt_bias); kfree(queue); } |