taprio: Fix allowing too small intervals

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It's possible that the user specifies an interval that couldn't allow
any packet to be transmitted. This also avoids the issue of the
hrtimer handler starving the other threads because it's running too
often.

The solution is to reject interval sizes that according to the current
link speed wouldn't allow any packet to be transmitted.

Reported-by: syzbot+8267241609ae8c23b248@syzkaller.appspotmail.com
Fixes: 5a781ccbd1 ("tc: Add support for configuring the taprio scheduler")
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Vinicius Costa Gomes 2020-09-09 17:03:11 -07:00 • committed by David S. Miller

parent 53467ecb6f

commit b5b73b26b3

1 changed files with 17 additions and 11 deletions

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28

net/sched/sch_taprio.c

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