Eric Lee / linux-smarc-t335x-v3.2

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Commit ac1f0ac22c7be908fd33407273b9808bfaedada4

Authored by Milan Broz
Committed by Alasdair G Kergon
1 parent 2045e88edb
Exists in master and in 4 other branches v3.2_AM335xPSP_04.06.00.11, v3.2_NEWT335xPSP_04.06.00.11, v3.2_SBC_SMARTMEN, v3.2_SMARCT335xPSP_04.06.00.11

dm log: ensure log bitmap fits on log device 

Check that the log bitmap will fit within the log device.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

Showing 1 changed file with 8 additions and 0 deletions Side-by-side Diff

... ... @@ -457,6 +457,14 @@
457 457 */
458 458 buf_size = dm_round_up((LOG_OFFSET << SECTOR_SHIFT) +
459 459 bitset_size, ti->limits.hardsect_size);
  460 +
  461 + if (buf_size > dev->bdev->bd_inode->i_size) {
  462 + DMWARN("log device %s too small: need %llu bytes",
  463 + dev->name, (unsigned long long)buf_size);
  464 + kfree(lc);
  465 + return -EINVAL;
  466 + }
  467 +
460 468 lc->header_location.count = buf_size >> SECTOR_SHIFT;
461 469  
462 470 lc->io_req.mem.type = DM_IO_VMA;