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[ Upstream commit39c0c8553b] Calling vha->hw->tgt.tgt_ops->free_cmd() from qlt_xmit_response() is wrong since the command for which a response is sent must remain valid until the SCSI target core calls .release_cmd(). It has been observed that the following scenario triggers a kernel crash: - qlt_xmit_response() calls qlt_check_reserve_free_req() - qlt_check_reserve_free_req() returns -EAGAIN - qlt_xmit_response() calls vha->hw->tgt.tgt_ops->free_cmd(cmd) - transport_handle_queue_full() tries to retransmit the response Fix this crash by reverting the patch that introduced it. Link: https://lore.kernel.org/r/20210320232359.941-2-bvanassche@acm.org Fixes:0dcec41acb("scsi: qla2xxx: Make sure that aborted commands are freed") Cc: Quinn Tran <qutran@marvell.com> Cc: Mike Christie <michael.christie@oracle.com> Reviewed-by: Daniel Wagner <dwagner@suse.de> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.