diff options
| author | Mark Johnston <[email protected]> | 2021-07-16 09:27:11 -0400 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2021-07-26 11:53:47 -0700 |
| commit | 03363b2f86a97f95127085864a8323853f78f479 (patch) | |
| tree | a9101579ad406760503103c7afb933fa723ebf4d /module/zfs | |
| parent | da27b8bc7f2778b28fa73547ff91bb8cc962fc0e (diff) | |
Initialize all fields in zfs_log_xvattr()
When logging TX_SETATTR, we could otherwise fail to initialize part of
the corresponding ZIL record depending on which fields are present in
the xvattr. Initialize the creation time and the AV scan timestamp to
zero so that uninitialized bytes are not written to the ZIL.
This was found using KMSAN.
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Alexander Motin <[email protected]>
Signed-off-by: Mark Johnston <[email protected]>
Closes #12383
Diffstat (limited to 'module/zfs')
| -rw-r--r-- | module/zfs/zfs_log.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/module/zfs/zfs_log.c b/module/zfs/zfs_log.c index 0f330ec93..6d2e41ad9 100644 --- a/module/zfs/zfs_log.c +++ b/module/zfs/zfs_log.c @@ -126,9 +126,11 @@ zfs_log_xvattr(lr_attr_t *lrattr, xvattr_t *xvap) /* Now pack the attributes up in a single uint64_t */ attrs = (uint64_t *)bitmap; + *attrs = 0; crtime = attrs + 1; + bzero(crtime, 2 * sizeof (uint64_t)); scanstamp = (caddr_t)(crtime + 2); - *attrs = 0; + bzero(scanstamp, AV_SCANSTAMP_SZ); if (XVA_ISSET_REQ(xvap, XAT_READONLY)) *attrs |= (xoap->xoa_readonly == 0) ? 0 : XAT0_READONLY; |