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| author |   Paul Moore <paul@paul-moore.com> | 2019-02-25 19:06:06 -0500 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-02-27 21:45:24 -0800 |
| commit | 5578de4834fe0f2a34fedc7374be691443396d1f (patch) | |
| tree | 57b5851e93a59389e6a1bb0cfaee81d1c586ba5f /net/ipv4 | |
| parent | ipv4: Pass original device to ip_rcv_finish_core (diff) | |
| download | linux-dev-5578de4834fe0f2a34fedc7374be691443396d1f.tar.xz linux-dev-5578de4834fe0f2a34fedc7374be691443396d1f.zip | |
netlabel: fix out-of-bounds memory accesses
There are two array out-of-bounds memory accesses, one in
cipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk(). Both
errors are embarassingly simple, and the fixes are straightforward.
As a FYI for anyone backporting this patch to kernels prior to v4.8,
you'll want to apply the netlbl_bitmap_walk() patch to
cipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn't exist before
Linux v4.8.
Reported-by: Jann Horn <jannh@google.com>
Fixes: 446fda4f2682 ("[NetLabel]: CIPSOv4 engine")
Fixes: 3faa8f982f95 ("netlabel: Move bitmap manipulation functions to the NetLabel core.")
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/cipso_ipv4.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c index eff86a71c1b0..f0165c5f376b 100644 --- a/net/ipv4/cipso_ipv4.c +++ b/net/ipv4/cipso_ipv4.c @@ -667,7 +667,8 @@ static int cipso_v4_map_lvl_valid(const struct cipso_v4_doi *doi_def, u8 level) case CIPSO_V4_MAP_PASS: return 0; case CIPSO_V4_MAP_TRANS: - if (doi_def->map.std->lvl.cipso[level] < CIPSO_V4_INV_LVL) + if ((level < doi_def->map.std->lvl.cipso_size) && + (doi_def->map.std->lvl.cipso[level] < CIPSO_V4_INV_LVL)) return 0; break; } |