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 4.9-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-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6de65fcfdb51835789b245203d1bfc8d14cb1e06 Mon Sep 17 00:00:00 2001
From: Joeseph Chang <joechang@xxxxxxxxxxxxxx>
Date: Mon, 27 Mar 2017 20:22:09 -0600
Subject: ipmi: Fix kernel panic at ipmi_ssif_thread()
From: Joeseph Chang <joechang@xxxxxxxxxxxxxx>
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.
Signed-off-by: Joeseph Chang <joechang@xxxxxxxxxxxxxx>
Signed-off-by: Corey Minyard <cminyard@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/char/ipmi/ipmi_ssif.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/char/ipmi/ipmi_ssif.c
+++ b/drivers/char/ipmi/ipmi_ssif.c
@@ -892,6 +892,7 @@ 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);
@@ -900,6 +901,7 @@ 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)
/*
@@ -913,7 +915,7 @@ 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 joechang@xxxxxxxxxxxxxx are
queue-4.9/ipmi-fix-kernel-panic-at-ipmi_ssif_thread.patch