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net: sched: Use struct_size() helper in kvmalloc()

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Make use of the struct_size() helper instead of an open-coded version,
in order to avoid any potential type mistakes or integer overflows
that, in the worst scenario, could lead to heap overflows.

Link: https://github.com/KSPP/linux/issues/160
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20210929201718.GA342296@embeddedor
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Gustavo A. R. Silva 2021-09-29 15:17:18 -05:00 committed by Jakub Kicinski
parent dd9a887b35
commit 129291980f
1 changed files with 1 additions and 1 deletions
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net/sched/sch_netem.c
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@ -785,7 +785,7 @@ static int get_dist_table(struct Qdisc *sch, struct disttable **tbl,
if (!n || n > NETEM_DIST_MAX)
return -EINVAL;
d = kvmalloc(sizeof(struct disttable) + n * sizeof(s16), GFP_KERNEL);
d = kvmalloc(struct_size(d, table, n), GFP_KERNEL);
if (!d)
return -ENOMEM;