Patch "ipmi: Fix kernel panic at ipmi_ssif_thread()" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

ipmi: Fix kernel panic at ipmi_ssif_thread()

to the 4.4-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:
ipmi-fix-kernel-panic-at-ipmi_ssif_thread.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Joeseph Chang <[email protected]>
Date: Mon, 27 Mar 2017 20:22:09 -0600
Subject: ipmi: Fix kernel panic at ipmi_ssif_thread()

From: Joeseph Chang <[email protected]>

commit 6de65fcfdb51835789b245203d1bfc8d14cb1e06 upstream.

msg_written_handler() may set ssif_info->multi_data to NULL when using ipmitool to write fru.

Before setting ssif_info->multi_data to NULL, add new local pointer "data_to_send" and store correct i2c data pointer to it to fix NULL pointer kernel panic and incorrect ssif_info->multi_pos.

---
 drivers/char/ipmi/ipmi_ssif.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

@@ -888,6 +888,7 @@ static void msg_written_handler(struct s
 		 * for details on the intricacies of this.
 		 */
 		int left;
+		unsigned char *data_to_send;
 
 		ssif_inc_stat(ssif_info, sent_messages_parts);
 

@@ -896,6 +897,7 @@ static void msg_written_handler(struct s
 			left = 32;
 		/* Length byte. */
 		ssif_info->multi_data[ssif_info->multi_pos] = left;
+		data_to_send = ssif_info->multi_data + ssif_info->multi_pos;
 		ssif_info->multi_pos += left;
 		if (left < 32)
 			/*

@@ -909,7 +911,7 @@ static void msg_written_handler(struct s
 		rv = ssif_i2c_send(ssif_info, msg_written_handler,
 				  I2C_SMBUS_WRITE,
 				  SSIF_IPMI_MULTI_PART_REQUEST_MIDDLE,
-				  ssif_info->multi_data + ssif_info->multi_pos,
+				  data_to_send,
 				  I2C_SMBUS_BLOCK_DATA);
 		if (rv < 0) {
 			/* request failed, just return the error. */

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/ipmi-fix-kernel-panic-at-ipmi_ssif_thread.patch