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authorHoan Tran2016-10-10 10:13:10 -0700
committerWolfram Sang2016-10-25 11:50:52 +0200
commit603616017c35f4d0fbdbcace72adf9bf949c4a65 (patch)
treeada121761e6a90165f86d2578087750e2afea7ac /drivers/i2c
parent60a951af8e1656e2a17a96d64941aafe0668d750 (diff)
i2c: xgene: Avoid dma_buffer overrun
SMBus block command uses the first byte of buffer for the data length. The dma_buffer should be increased by 1 to avoid the overrun issue. Reported-by: Phil Endecott <phil_gjouf_endecott@chezphil.org> Signed-off-by: Hoan Tran <hotran@apm.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-xgene-slimpro.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-xgene-slimpro.c b/drivers/i2c/busses/i2c-xgene-slimpro.c
index 263685c7a512..05cf192ef1ac 100644
--- a/drivers/i2c/busses/i2c-xgene-slimpro.c
+++ b/drivers/i2c/busses/i2c-xgene-slimpro.c
@@ -105,7 +105,7 @@ struct slimpro_i2c_dev {
struct mbox_chan *mbox_chan;
struct mbox_client mbox_client;
struct completion rd_complete;
- u8 dma_buffer[I2C_SMBUS_BLOCK_MAX];
+ u8 dma_buffer[I2C_SMBUS_BLOCK_MAX + 1]; /* dma_buffer[0] is used for length */
u32 *resp_msg;
};