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e2fsck: don't try to set a UUID on metadata_csum file systems 

If the UUID field is NULL, e2fsck will try to generate and set a new
UUID.  This will cause massive problems if the metadata_csum feature
is set, so avoid doing so in that case.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
debian
Theodore Ts'o 2016-04-15 20:51:36 -04:00
parent b4f02c9f32
commit 24b8916a62
1 changed files with 1 additions and 0 deletions
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1
e2fsck/super.c
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@ -756,6 +756,7 @@ void check_super_block(e2fsck_t ctx)
* if the id changes under the kernel remounting rw may fail.
*/
if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid) &&
!ext2fs_has_feature_metadata_csum(ctx->fs->super) &&
(!csum_flag || !(ctx->mount_flags & EXT2_MF_MOUNTED))) {
if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
uuid_generate(sb->s_uuid);