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| author |   Darrick J. Wong <djwong@kernel.org> | 2022-11-10 12:16:34 -0800 |
|---|---|---|
| committer |   Theodore Ts'o <tytso@mit.edu> | 2022-12-08 21:49:24 -0500 |
| commit | a7e9d977e031fceefe1e7cd69ebd7202d5758b56 (patch) | |
| tree | 0bb1c6961ea66042b751bc4b4b765edf6779825e /fs/ext4/resize.c | |
| parent | ext4: dont return EINVAL from GETFSUUID when reporting UUID length (diff) | |
| download | linux-rng-a7e9d977e031fceefe1e7cd69ebd7202d5758b56.tar.xz linux-rng-a7e9d977e031fceefe1e7cd69ebd7202d5758b56.zip | |
ext4: don't fail GETFSUUID when the caller provides a long buffer
If userspace provides a longer UUID buffer than is required, we
shouldn't fail the call with EINVAL -- rather, we can fill the caller's
buffer with the bytes we /can/ fill, and update the length field to
reflect what we copied. This doesn't break the UAPI since we're
enabling a case that currently fails, and so far Ted hasn't released a
version of e2fsprogs that uses the new ext4 ioctl.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Catherine Hoang <catherine.hoang@oracle.com>
Link: https://lore.kernel.org/r/166811139478.327006.13879198441587445544.stgit@magnolia
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Diffstat (limited to 'fs/ext4/resize.c')
0 files changed, 0 insertions, 0 deletions