diff options
| author | Joeseph Chang <joechang@codeaurora.org> | 2017-03-28 05:22:09 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-20 15:28:41 +0300 |
| commit | 46ba11b007c1988cd12ac5f40224b4393689a86b (patch) | |
| tree | 0b4494ee117c5018ef2807919984371b322ad195 /drivers/char | |
| parent | 6e7de39ef9a4fde0a9dd712e7cc4c923a76212ae (diff) | |
| download | linux-46ba11b007c1988cd12ac5f40224b4393689a86b.tar.xz | |
ipmi: Fix kernel panic at ipmi_ssif_thread()
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@codeaurora.org>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/ipmi/ipmi_ssif.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c index 5673ffff00be..6958b5ce9145 100644 --- a/drivers/char/ipmi/ipmi_ssif.c +++ b/drivers/char/ipmi/ipmi_ssif.c @@ -892,6 +892,7 @@ 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); @@ -900,6 +901,7 @@ 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) /* @@ -913,7 +915,7 @@ 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. */ |