This is a note to let you know that I've just added the patch titled
target: prevent NULL pointer dereference in target_report_luns
to the 3.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
target-prevent-null-pointer-dereference-in-target_report_luns.patch
and it can be found in the queue-3.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 47f1b8803e1e358ebbf4f82bfdb98971c912a2c3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rn=20Engel?= <[email protected]>
Date: Wed, 15 Feb 2012 16:52:11 -0500
Subject: target: prevent NULL pointer dereference in target_report_luns
From: =?UTF-8?q?J=C3=B6rn=20Engel?= <[email protected]>
commit 47f1b8803e1e358ebbf4f82bfdb98971c912a2c3 upstream.
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: Joern Engel <[email protected]>
Signed-off-by: Nicholas Bellinger <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/target/target_core_device.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -658,7 +658,9 @@ int target_report_luns(struct se_task *s
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
Patches currently in stable-queue which might be from [email protected] are
queue-3.2/target-fix-use-after-free-in-target_report_luns.patch
queue-3.2/target-prevent-null-pointer-dereference-in-target_report_luns.patch
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