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fs/f2fs: Fix off-by-one error in nat journal entries check

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Oops. You're allowed to have up to n = NAT_JOURNAL_ENTRIES entries
_inclusive_, because the loop below uses i < n, not i <= n. D'oh.

Fixes: 4bd9877f62 (fs/f2fs: Do not read past the end of nat journal entries)

Reported-by: программист нект <programmer11180@programist.ru>
Tested-by: программист нект <programmer11180@programist.ru>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Daniel Axtens authored and Daniel Kiper committed 2023-01-19 17:39:05 +01:00
1 parent b58aa4e209
commit 4de39a2af6
1 file changed
+1 -1
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grub-core/fs/f2fs.c
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@@ -650,7 +650,7 @@ get_blkaddr_from_nat_journal (struct grub_f2fs_data *data, grub_uint32_t nid,
grub_uint16_t n = grub_le_to_cpu16 (data->nat_j.n_nats);
grub_uint16_t i;
if (n >= NAT_JOURNAL_ENTRIES)
if (n > NAT_JOURNAL_ENTRIES)
return grub_error (GRUB_ERR_BAD_FS,
"invalid number of nat journal entries");