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s3:locking: Fix integer overflow check in posix_lock_in_range()

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This fixes compilation with -Wstrict-overflow=2

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This commit is contained in:
Andreas Schneider 2017-12-07 18:24:18 +01:00 committed by Jeremy Allison
parent 3a383038ee
commit 9f6de82ef2
1 changed files with 2 additions and 1 deletions
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source3/locking/posix.c
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@ -145,7 +145,8 @@ static bool posix_lock_in_range(off_t *offset_out, off_t *count_out,
* Truncate count to end at max lock offset.
*/
if (offset + count < 0 || offset + count > max_positive_lock_offset) {
if (offset > INT64_MAX - count ||
offset + count > max_positive_lock_offset) {
count = max_positive_lock_offset - offset;
}