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mptfusion: don't allow negative bytes in kbuf_alloc_2_sgl()

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There is a static checker warning here because "bytes" is controlled by
the user and we cap the upper bound with min() but allow negatives.
Negative bytes will result in some nasty warning messages but are not
super harmful.  Anyway, no one needs negative bytes so let's just check
for it and return NULL.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Dan Carpenter 2015-11-11 01:15:24 +03:00 committed by Martin K. Petersen
parent 9c9bd593f3
commit 491212014e
1 changed files with 4 additions and 0 deletions
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4
drivers/message/fusion/mptctl.c
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@ -1038,6 +1038,10 @@ kbuf_alloc_2_sgl(int bytes, u32 sgdir, int sge_offset, int *frags,
int i, buflist_ent;
int sg_spill = MAX_FRAGS_SPILL1;
int dir;
if (bytes < 0)
return NULL;
/* initialization */
*frags = 0;
*blp = NULL;