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scsi: sym53c8xx_2: iterator underflow in sym_getsync()

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We wanted to exit the loop with "div" set to zero, but instead, if we
don't hit the break then "div" is -1 when we finish the loop.  It leads
to an array underflow a few lines later.

Signed-off-by: Dan Carpenter <[email protected]>
Reviewed-by: Johannes Thumshirn <[email protected]>
Acked-by: Matthew Wilcox <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
This commit is contained in:
Dan Carpenter 2018-01-25 17:13:40 +03:00 • committed by Martin K. Petersen
commit e6f791d953
1 changed files with 1 additions and 1 deletions
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drivers/scsi/sym53c8xx_2/sym_hipd.c
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@ -536,7 +536,7 @@ sym_getsync(struct sym_hcb *np, u_char dt, u_char sfac, u_char *divp, u_char *fa
* Look for the greatest clock divisor that allows an
* input speed faster than the period.
*/
while (div-- > 0)
while (--div > 0)
if (kpc >= (div_10M[div] << 2)) break;
/*