From: Bikash Hazarika bhazarika@marvell.com
commit 464ea494a40c6e3e0e8f91dd325408aaf21515ba upstream.
Klocwork tool reported 'cur_dsd' may be dereferenced. Add fix to validate pointer before dereferencing the pointer.
Cc: stable@vger.kernel.org Signed-off-by: Bikash Hazarika bhazarika@marvell.com Signed-off-by: Nilesh Javali njavali@marvell.com Link: https://lore.kernel.org/r/20230607113843.37185-3-njavali@marvell.com Reviewed-by: Himanshu Madhani himanshu.madhani@oracle.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/scsi/qla2xxx/qla_iocb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/scsi/qla2xxx/qla_iocb.c +++ b/drivers/scsi/qla2xxx/qla_iocb.c @@ -601,7 +601,8 @@ qla24xx_build_scsi_type_6_iocbs(srb_t *s put_unaligned_le32(COMMAND_TYPE_6, &cmd_pkt->entry_type);
/* No data transfer */ - if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) { + if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE || + tot_dsds == 0) { cmd_pkt->byte_count = cpu_to_le32(0); return 0; }