Hi Mike, url: https://github.com/0day-ci/linux/commits/Mike-Christie/vhost-scsi-fixes-and-cleanups/20200922-031251 base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next config: i386-randconfig-m021-20200923 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> smatch warnings: drivers/vhost/scsi.c:606 vhost_scsi_get_cmd() error: uninitialized symbol 'cpu'. # https://github.com/0day-ci/linux/commit/aef0e1e9298ab68f2d7bdf1afb9a376641b993d5 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Mike-Christie/vhost-scsi-fixes-and-cleanups/20200922-031251 git checkout aef0e1e9298ab68f2d7bdf1afb9a376641b993d5 vim +/cpu +606 drivers/vhost/scsi.c 1a1ff8256af679c8 drivers/vhost/scsi.c Nicholas Bellinger 2015-01-31 572 static struct vhost_scsi_cmd * aef0e1e9298ab68f drivers/vhost/scsi.c Mike Christie 2020-09-21 573 vhost_scsi_get_cmd(struct vhost_virtqueue *vq, struct vhost_scsi_tpg *tpg, 95e7c4341b8e28da drivers/vhost/scsi.c Nicholas Bellinger 2014-02-22 574 unsigned char *cdb, u64 scsi_tag, u16 lun, u8 task_attr, 95e7c4341b8e28da drivers/vhost/scsi.c Nicholas Bellinger 2014-02-22 575 u32 exp_data_len, int data_direction) 057cbf49a1f08297 drivers/vhost/tcm_vhost.c Nicholas Bellinger 2012-07-18 576 { aef0e1e9298ab68f drivers/vhost/scsi.c Mike Christie 2020-09-21 577 struct vhost_scsi_virtqueue *svq = container_of(vq, aef0e1e9298ab68f drivers/vhost/scsi.c Mike Christie 2020-09-21 578 struct vhost_scsi_virtqueue, vq); 1a1ff8256af679c8 drivers/vhost/scsi.c Nicholas Bellinger 2015-01-31 579 struct vhost_scsi_cmd *cmd; 1a1ff8256af679c8 drivers/vhost/scsi.c Nicholas Bellinger 2015-01-31 580 struct vhost_scsi_nexus *tv_nexus; b1935f687bb93b20 drivers/vhost/scsi.c Nicholas Bellinger 2014-02-22 581 struct scatterlist *sg, *prot_sg; 3aee26b4ae91048c drivers/vhost/scsi.c Nicholas Bellinger 2013-06-21 582 struct page **pages; 10e9cbb6b531117b drivers/vhost/scsi.c Matthew Wilcox 2018-06-12 583 int tag, cpu; 057cbf49a1f08297 drivers/vhost/tcm_vhost.c Nicholas Bellinger 2012-07-18 584 9871831283e79575 drivers/vhost/scsi.c Asias He 2013-05-06 585 tv_nexus = tpg->tpg_nexus; 057cbf49a1f08297 drivers/vhost/tcm_vhost.c Nicholas Bellinger 2012-07-18 586 if (!tv_nexus) { 1a1ff8256af679c8 drivers/vhost/scsi.c Nicholas Bellinger 2015-01-31 587 pr_err("Unable to locate active struct vhost_scsi_nexus\n"); 057cbf49a1f08297 drivers/vhost/tcm_vhost.c Nicholas Bellinger 2012-07-18 588 return ERR_PTR(-EIO); 057cbf49a1f08297 drivers/vhost/tcm_vhost.c Nicholas Bellinger 2012-07-18 589 } 057cbf49a1f08297 drivers/vhost/tcm_vhost.c Nicholas Bellinger 2012-07-18 590 aef0e1e9298ab68f drivers/vhost/scsi.c Mike Christie 2020-09-21 591 tag = sbitmap_get(&svq->scsi_tags, 0, false); 4a47d3a1ff10e564 drivers/vhost/scsi.c Nicholas Bellinger 2013-09-23 592 if (tag < 0) { 1a1ff8256af679c8 drivers/vhost/scsi.c Nicholas Bellinger 2015-01-31 593 pr_err("Unable to obtain tag for vhost_scsi_cmd\n"); 4a47d3a1ff10e564 drivers/vhost/scsi.c Nicholas Bellinger 2013-09-23 594 return ERR_PTR(-ENOMEM); 4a47d3a1ff10e564 drivers/vhost/scsi.c Nicholas Bellinger 2013-09-23 595 } 4a47d3a1ff10e564 drivers/vhost/scsi.c Nicholas Bellinger 2013-09-23 596 aef0e1e9298ab68f drivers/vhost/scsi.c Mike Christie 2020-09-21 597 cmd = &svq->scsi_cmds[tag]; 3aee26b4ae91048c drivers/vhost/scsi.c Nicholas Bellinger 2013-06-21 598 sg = cmd->tvc_sgl; b1935f687bb93b20 drivers/vhost/scsi.c Nicholas Bellinger 2014-02-22 599 prot_sg = cmd->tvc_prot_sgl; 3aee26b4ae91048c drivers/vhost/scsi.c Nicholas Bellinger 2013-06-21 600 pages = cmd->tvc_upages; 473f0b15a4c97d39 drivers/vhost/scsi.c Markus Elfring 2017-05-20 601 memset(cmd, 0, sizeof(*cmd)); 3aee26b4ae91048c drivers/vhost/scsi.c Nicholas Bellinger 2013-06-21 602 cmd->tvc_sgl = sg; b1935f687bb93b20 drivers/vhost/scsi.c Nicholas Bellinger 2014-02-22 603 cmd->tvc_prot_sgl = prot_sg; 3aee26b4ae91048c drivers/vhost/scsi.c Nicholas Bellinger 2013-06-21 604 cmd->tvc_upages = pages; 4824d3bfb9097ac5 drivers/vhost/scsi.c Nicholas Bellinger 2013-06-07 605 cmd->tvc_se_cmd.map_tag = tag; 10e9cbb6b531117b drivers/vhost/scsi.c Matthew Wilcox 2018-06-12 @606 cmd->tvc_se_cmd.map_cpu = cpu; "cpu" is never initialized. 95e7c4341b8e28da drivers/vhost/scsi.c Nicholas Bellinger 2014-02-22 607 cmd->tvc_tag = scsi_tag; 95e7c4341b8e28da drivers/vhost/scsi.c Nicholas Bellinger 2014-02-22 608 cmd->tvc_lun = lun; 95e7c4341b8e28da drivers/vhost/scsi.c Nicholas Bellinger 2014-02-22 609 cmd->tvc_task_attr = task_attr; 3c63f66a0dcdd6cb drivers/vhost/scsi.c Asias He 2013-05-06 610 cmd->tvc_exp_data_len = exp_data_len; 3c63f66a0dcdd6cb drivers/vhost/scsi.c Asias He 2013-05-06 611 cmd->tvc_data_direction = data_direction; 3c63f66a0dcdd6cb drivers/vhost/scsi.c Asias He 2013-05-06 612 cmd->tvc_nexus = tv_nexus; 1a1ff8256af679c8 drivers/vhost/scsi.c Nicholas Bellinger 2015-01-31 613 cmd->inflight = vhost_scsi_get_inflight(vq); 057cbf49a1f08297 drivers/vhost/tcm_vhost.c Nicholas Bellinger 2012-07-18 614 1a1ff8256af679c8 drivers/vhost/scsi.c Nicholas Bellinger 2015-01-31 615 memcpy(cmd->tvc_cdb, cdb, VHOST_SCSI_MAX_CDB_SIZE); 95e7c4341b8e28da drivers/vhost/scsi.c Nicholas Bellinger 2014-02-22 616 3c63f66a0dcdd6cb drivers/vhost/scsi.c Asias He 2013-05-06 617 return cmd; 057cbf49a1f08297 drivers/vhost/tcm_vhost.c Nicholas Bellinger 2012-07-18 618 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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