K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2020-11-11T13:48:07.778711Z
K 7
svn:log
V 512
ffs: Clamp BIO_SPEEDUP length

On 32-bit platforms, the computed size of the BIO_SPEEDUP requested by
softdep_request_cleanup() may be negative when assigned to bp->b_bcount,
which has type "long".

Clamp the size to LONG_MAX.  Also convert the unused g_io_speedup() to
use an off_t for the magnitude of the shortage for consistency with
softdep_send_speedup().

Reviewed by:	chs, kib
Reported by:	pho
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D27081

END