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Message-Id: <1434443826-4929-122-git-send-email-lizf@kernel.org> Date: Tue, 16 Jun 2015 16:36:16 +0800 From: lizf@...nel.org To: stable@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Nicholas Bellinger <nab@...ux-iscsi.org>, Zefan Li <lizefan@...wei.com> Subject: [PATCH 3.4 122/172] target/pscsi: Fix NULL pointer dereference in get_device_type From: Nicholas Bellinger <nab@...ux-iscsi.org> 3.4.108-rc1 review patch. If anyone has any objections, please let me know. ------------------ commit 215a8fe4198f607f34ecdbc9969dae783d8b5a61 upstream. This patch fixes a NULL pointer dereference OOPs with pSCSI backends within target_core_stat.c code. The bug is caused by a configfs attr read if no pscsi_dev_virt->pdv_sd has been configured. Reported-by: Olaf Hering <olaf@...fle.de> Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org> Signed-off-by: Zefan Li <lizefan@...wei.com> --- drivers/target/target_core_pscsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c index d34577d..8082674 100644 --- a/drivers/target/target_core_pscsi.c +++ b/drivers/target/target_core_pscsi.c @@ -1165,7 +1165,7 @@ static u32 pscsi_get_device_type(struct se_device *dev) struct pscsi_dev_virt *pdv = dev->dev_ptr; struct scsi_device *sd = pdv->pdv_sd; - return sd->type; + return (sd) ? sd->type : TYPE_NO_LUN; } static sector_t pscsi_get_blocks(struct se_device *dev) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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