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| author |   Darrick J. Wong <djwong@kernel.org> | 2022-11-10 12:16:29 -0800 |
|---|---|---|
| committer |   Theodore Ts'o <tytso@mit.edu> | 2022-12-08 21:49:24 -0500 |
| commit | b76abb5157468756163fe7e3431c9fe32cba57ca (patch) | |
| tree | aa7af365db6a4810e277ed9fca58acb80021a8cc /lib/parser.c | |
| parent | ext4: fix error code return to user-space in ext4_get_branch() (diff) | |
| download | linux-rng-b76abb5157468756163fe7e3431c9fe32cba57ca.tar.xz linux-rng-b76abb5157468756163fe7e3431c9fe32cba57ca.zip | |
ext4: dont return EINVAL from GETFSUUID when reporting UUID length
If userspace calls this ioctl with fsu_length (the length of the
fsuuid.fsu_uuid array) set to zero, ext4 copies the desired uuid length
out to userspace. The kernel call returned a result from a valid input,
so the return value here should be zero, not EINVAL.
While we're at it, fix the copy_to_user call to make it clear that we're
only copying out fsu_len.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Catherine Hoang <catherine.hoang@oracle.com>
Link: https://lore.kernel.org/r/166811138914.327006.9241306894437166566.stgit@magnolia
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Diffstat (limited to 'lib/parser.c')
0 files changed, 0 insertions, 0 deletions