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Commit 47f1b880 authored by Jörn Engel's avatar Jörn Engel Committed by Nicholas Bellinger
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target: prevent NULL pointer dereference in target_report_luns 



transport_kmap_data_sg can return NULL.  I never saw this trigger, but
returning -ENOMEM seems better than a crash.  Also removes a pointless
case while at it.

Signed-off-by: default avatarJoern Engel <joern@logfs.org>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 382436f8

drivers/target/target_core_device.c

+3 −1
Original line number Diff line number Diff line
@@ -652,7 +652,9 @@ int target_report_luns(struct se_task *se_task) 
	unsigned char *buf;

	u32 cdb_offset = 0, lun_count = 0, offset = 8, i;



	buf = (unsigned char *) transport_kmap_data_sg(se_cmd);

	buf = transport_kmap_data_sg(se_cmd);

	if (!buf)

		return -ENOMEM;



	/*

	 * If no struct se_session pointer is present, this struct se_cmd is