6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Maurizio Lombardi <mlombard@xxxxxxxxxx>
[ Upstream commit 5572a55a6f830ee3f3a994b6b962a5c327d28cb3 ]
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@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Keith Busch <kbusch@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/nvme/target/tcp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
index c65a1f4421f6..bd142aed20f4 100644
--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c
@@ -1859,8 +1859,10 @@ 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;
}
--
2.43.0
