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| author | Wei Yongjun <yongjun_wei@trendmicro.com.cn> | 2012-11-08 17:35:38 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2012-11-23 14:32:55 +0100 |
| commit | 298d80152c895859bd128552db7a5b228e8a23f7 (patch) | |
| tree | eb373edf3854f3c21b08aae0cf8e5f25a5553971 | |
| parent | 7c5d62388e88729775b10a1748f2810e413f1e51 (diff) | |
| download | linux-3.10-298d80152c895859bd128552db7a5b228e8a23f7.tar.gz linux-3.10-298d80152c895859bd128552db7a5b228e8a23f7.tar.bz2 linux-3.10-298d80152c895859bd128552db7a5b228e8a23f7.zip | |
mtip32xx: fix potential NULL pointer dereference in mtip_timeout_function()
The dereference to port should be moved below the NULL test.
dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | drivers/block/mtip32xx/mtip32xx.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index faa5591b579..9694dd99bbb 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -559,7 +559,7 @@ static void mtip_timeout_function(unsigned long int data) struct mtip_cmd *command; int tag, cmdto_cnt = 0; unsigned int bit, group; - unsigned int num_command_slots = port->dd->slot_groups * 32; + unsigned int num_command_slots; unsigned long to, tagaccum[SLOTBITS_IN_LONGS]; if (unlikely(!port)) @@ -572,6 +572,7 @@ static void mtip_timeout_function(unsigned long int data) } /* clear the tag accumulator */ memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); + num_command_slots = port->dd->slot_groups * 32; for (tag = 0; tag < num_command_slots; tag++) { /* |