From: Nicholas Bellinger Date: Thu, 1 Nov 2012 05:04:26 +0000 (-0700) Subject: target: Re-add explict zeroing of INQUIRY bounce buffer memory X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=dea5f0998aa82bdeca260b87c653db11e91329b2;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git target: Re-add explict zeroing of INQUIRY bounce buffer memory This patch fixes a regression in spc_emulate_inquiry() code where the local scope bounce buffer was no longer getting it's memory zeroed, causing various problems with SCSI initiators that depend upon areas of INQUIRY EVPD=0x83 payload having been zeroed. This bug was introduced with the following v3.7-rc1 patch + CC'ed stable commit: commit ffe7b0e9326d9c68f5688bef691dd49f1e0d3651 Author: Paolo Bonzini Date: Fri Sep 7 17:30:38 2012 +0200 target: support zero allocation length in INQUIRY Go ahead and re-add the missing memset of bounce buffer memory to be copied into the outgoing se_cmd descriptor kmapped SGL payload. Reported-by: Kelsey Prantis Cc: Kelsey Prantis Cc: Paolo Bonzini Cc: Andy Grover Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger --- diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index 9229bd9ad61..6fd434d3d7e 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -605,6 +605,8 @@ static int spc_emulate_inquiry(struct se_cmd *cmd) unsigned char buf[SE_INQUIRY_BUF]; int p, ret; + memset(buf, 0, SE_INQUIRY_BUF); + if (dev == tpg->tpg_virt_lun0.lun_se_dev) buf[0] = 0x3f; /* Not connected */ else