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| author | Frank Sorenson <fsorenso@redhat.com> | 2014-07-04 15:31:50 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-07-04 23:59:44 -0400 |
| commit | 4b59352edb5ce783ba578d708de1fda981acfec6 (patch) | |
| tree | a3a06f39a4683457ed0dcfe856e694836da88eed /misc | |
| parent | 2f8d0251967360ee216c339ee76f3ceab3aadb4d (diff) | |
| download | e2fsprogs-4b59352edb5ce783ba578d708de1fda981acfec6.tar.gz | |
mke2fs: prevent creation of filesystem with unsupported revision
It's a bit strange to accept revision levels higher than
the code creating the filesystem can understand, so don't
allow it.
At least the kernel will mount the fs readonly if it's too
high, but no other utility will touch it, so you can't
fix the error.
Just reject anything > EXT2_MAX_SUPP_REV at mkfs time.
Signed-off-by: Frank Sorenson <fsorenso@redhat.com>
[sandeen@redhat.com: Add more verbose commit log]
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'misc')
| -rw-r--r-- | misc/mke2fs.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/misc/mke2fs.c b/misc/mke2fs.c index da4ddace..883b8f2c 100644 --- a/misc/mke2fs.c +++ b/misc/mke2fs.c @@ -1659,6 +1659,11 @@ profile_error: _("bad revision level - %s"), optarg); exit(1); } + if (r_opt > EXT2_MAX_SUPP_REV) { + com_err(program_name, EXT2_ET_REV_TOO_HIGH, + _("while trying to create revision %d"), r_opt); + exit(1); + } fs_param.s_rev_level = r_opt; break; case 's': /* deprecated */ |