diff options
Diffstat (limited to 'fs/xfs/xfs_mount.c')
| -rw-r--r-- | fs/xfs/xfs_mount.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 460f93a9ce00..1fdd79c5bfa0 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -132,11 +132,15 @@ xfs_sb_validate_fsb_count( xfs_sb_t *sbp, uint64_t nblocks) { - ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); + uint64_t max_bytes; + 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; } |