Messages in this thread Patch in this message | | | From | Joeseph Chang <> | Subject | [PATCH] ipmi: Fix kernel panic at ipmi_ssif_thread() | Date | Mon, 27 Mar 2017 20:22:09 -0600 |
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Signed-off-by: Joeseph Chang <joechang@codeaurora.org> --- ipmi: Fix kernel panic at ipmi_ssif_thread()
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(-)
diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c index cca6e5b..51ba67d 100644 --- a/drivers/char/ipmi/ipmi_ssif.c +++ b/drivers/char/ipmi/ipmi_ssif.c @@ -891,6 +891,7 @@ static void msg_written_handler(struct ssif_info *ssif_info, int result, * for details on the intricacies of this. */ int left; + unsigned char *data_to_send; ssif_inc_stat(ssif_info, sent_messages_parts); @@ -899,6 +900,7 @@ static void msg_written_handler(struct ssif_info *ssif_info, int result, 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) /* @@ -912,7 +914,7 @@ static void msg_written_handler(struct ssif_info *ssif_info, int result, 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. */ -- 1.9.1
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