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(target mode) If handle_tmr() fails: - The code for QLA_TGT_ABTS results in memory-use-after-free and double-free: qlt_do_tmr_work() qlt_build_abts_resp_iocb() qpair->req->outstanding_cmds[h] = (srb_t *)mcmd; mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); FIRST FREE qlt_handle_abts_completion() mcmd = qlt_ctio_to_cmd() cmd = req->outstanding_cmds[h]; return cmd; vha = mcmd->vha; USE-AFTER-FREE ha->tgt.tgt_ops->free_mcmd(mcmd); SECOND FREE - qlt_send_busy() makes no sense because it sends a SCSI command response instead of a TMR response. Instead just call qlt_xmit_tm_rsp() to send a TMR failed response, since that code is well-tested and handles a number of corner cases. But it would be incorrect to call ha->tgt.tgt_ops->free_mcmd() after handle_tmr() failed, so add a flag to mcmd indicating the proper way to free the mcmd so that qlt_xmit_tm_rsp() can be used for both cases. Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Link: https://patch.msgid.link/09a1ff3d-6738-4953-a31b-10e89c540462@cybernetics.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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 reStructuredText 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.