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mm/hugetlbfs: fix for_each_hstate() loop in init_hugetlbfs_fs() 

LTP memfd_create04 started failing for some huge page sizes
after v5.4-10135-gc3bfc5dd73c6.

The problem is the check introduced to for_each_hstate() loop that
should skip default_hstate_idx.  Since it doesn't update 'i' counter,
all subsequent huge page sizes are skipped as well.

Fixes: 8fc312b32b ("mm/hugetlbfs: fix error handling when setting up mounts")
Signed-off-by: Jan Stancek <jstancek@redhat.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
alistair/sunxi64-5.5-dsi
Jan Stancek 2020-01-03 18:37:18 +01:00 committed by Linus Torvalds
parent 7ca4ad5ba8
commit 15f0ec941f
1 changed files with 3 additions and 1 deletions
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4
fs/hugetlbfs/inode.c
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@ -1498,8 +1498,10 @@ static int __init init_hugetlbfs_fs(void)
/* other hstates are optional */
i = 0;
for_each_hstate(h) {
if (i == default_hstate_idx)
if (i == default_hstate_idx) {
i++;
continue;
}
mnt = mount_one_hugetlbfs(h);
if (IS_ERR(mnt))