diff options
| -rw-r--r-- | fs/xfs/xfs_mount.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 09eef1721ef4f..3949f720b5354 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -132,11 +132,16 @@ xfs_sb_validate_fsb_count( xfs_sb_t *sbp, uint64_t nblocks) { + uint64_t max_bytes; + ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); ASSERT(sbp->sb_blocklog >= BBSHIFT); + if (check_shl_overflow(nblocks, sbp->sb_blocklog, &max_bytes)) + return -EFBIG; + /* Limited by ULONG_MAX of page cache index */ - if (nblocks >> (PAGE_SHIFT - sbp->sb_blocklog) > ULONG_MAX) + if (max_bytes >> PAGE_SHIFT > ULONG_MAX) return -EFBIG; return 0; } |