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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2015-08-01 15:33:26 +0300 |
|---|---|---|
| committer | Zefan Li <lizefan@huawei.com> | 2016-03-21 09:17:50 +0800 |
| commit | d86129c5c06c65e38408012ec32dba84c8fe5f3a (patch) | |
| tree | 5c34c760e26ccd171976030babcb3f64c2b2c81e /net/unix/af_unix.c | |
| parent | 24e5a859b45ac6b810c518187dd0b4cde3d54f45 (diff) | |
rds: fix an integer overflow test in rds_info_getsockopt()
commit 468b732b6f76b138c0926eadf38ac88467dcd271 upstream.
"len" is a signed integer. We check that len is not negative, so it
goes from zero to INT_MAX. PAGE_SIZE is unsigned long so the comparison
is type promoted to unsigned long. ULONG_MAX - 4095 is a higher than
INT_MAX so the condition can never be true.
I don't know if this is harmful but it seems safe to limit "len" to
INT_MAX - 4095.
Fixes: a8c879a7ee98 ('RDS: Info and stats')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Zefan Li <lizefan@huawei.com>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions