nvmet-tcp: fix a crash in nvmet_req_complete()

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[ Upstream commit 0849a54413 ]

in nvmet_tcp_handle_h2c_data_pdu(), if the host sends a data_offset
different from rbytes_done, the driver ends up calling nvmet_req_complete()
passing a status error.
The problem is that at this point cmd->req is not yet initialized,
the kernel will crash after dereferencing a NULL pointer.

Fix the bug by replacing the call to nvmet_req_complete() with
nvmet_tcp_fatal_error().

Fixes: 872d26a391 ("nvmet-tcp: add NVMe over TCP target driver")
Reviewed-by: Keith Busch <kbsuch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Maurizio Lombardi 2023-12-22 16:17:49 +01:00 • committed by Greg Kroah-Hartman

parent 2871aa4070

commit 83ccd15717

1 changed files with 1 additions and 2 deletions

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drivers/nvme/target/tcp.c

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