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| author | Maurizio Lombardi <mlombard@redhat.com> | 2024-08-21 16:28:26 +0200 |
|---|---|---|
| committer | Keith Busch <kbusch@kernel.org> | 2024-08-26 16:00:52 -0700 |
| commit | 5572a55a6f830ee3f3a994b6b962a5c327d28cb3 (patch) | |
| tree | 6ce601118798d7c679151a556120c5dd465054d3 /drivers/nvme | |
| parent | 5a6d3a638c93881b7a7c13df870238b91399578a (diff) | |
| download | lwn-5572a55a6f830ee3f3a994b6b962a5c327d28cb3.tar.gz lwn-5572a55a6f830ee3f3a994b6b962a5c327d28cb3.zip | |
nvmet-tcp: fix kernel crash if commands allocation fails
If the commands allocation fails in nvmet_tcp_alloc_cmds()
the kernel crashes in nvmet_tcp_release_queue_work() because of
a NULL pointer dereference.
nvmet: failed to install queue 0 cntlid 1 ret 6
Unable to handle kernel NULL pointer dereference at
virtual address 0000000000000008
Fix the bug by setting queue->nr_cmds to zero in case
nvmet_tcp_alloc_cmd() fails.
Fixes: 872d26a391da ("nvmet-tcp: add NVMe over TCP target driver")
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/target/tcp.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index 5bff0d5464d1..7c51c2a8c109 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -2146,8 +2146,10 @@ static u16 nvmet_tcp_install_queue(struct nvmet_sq *sq) } queue->nr_cmds = sq->size * 2; - if (nvmet_tcp_alloc_cmds(queue)) + if (nvmet_tcp_alloc_cmds(queue)) { + queue->nr_cmds = 0; return NVME_SC_INTERNAL; + } return 0; } |