| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sat, 12 Oct 2013 16:17:44 +0800
From: Zheng Liu <gnehzuil.liu@...il.com>
To: "Darrick J. Wong" <darrick.wong@...cle.com>
Cc: linux-ext4@...r.kernel.org, Theodore Ts'o <tytso@....edu>,
Zheng Liu <wenqing.lz@...bao.com>
Subject: Re: [PATCH v1 17/22] e2fsck: check inline_data in pass1
On Fri, Oct 11, 2013 at 05:47:09PM -0700, Darrick J. Wong wrote:
> On Fri, Aug 02, 2013 at 05:49:44PM +0800, Zheng Liu wrote:
> > From: Zheng Liu <wenqing.lz@...bao.com>
> >
> > Signed-off-by: Theodore Ts'o <tytso@....edu>
> > Signed-off-by: Zheng Liu <wenqing.lz@...bao.com>
> > ---
> > e2fsck/pass1.c | 70 ++++++++++++++++++++++++++++++++++++++++++++---
> > lib/ext2fs/dblist_dir.c | 10 +++++--
> > 2 files changed, 74 insertions(+), 6 deletions(-)
> >
> > diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
> > index e6ea460..4301bb9 100644
> > --- a/e2fsck/pass1.c
> > +++ b/e2fsck/pass1.c
> > @@ -202,6 +202,16 @@ int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino,
> > return i;
> > }
> >
> > + if (inode->i_flags & EXT4_INLINE_DATA_FL) {
> > + unsigned int inline_size;
> > +
> > + inline_size = ext2fs_inline_data_get_size(fs, ino);
> > + if (inline_size == inode->i_size)
> > + return 1;
> > + else
> > + return 0;
> > + }
> > +
> > blocks = ext2fs_inode_data_blocks2(fs, inode);
> > if (blocks) {
> > if ((inode->i_size >= fs->blocksize) ||
> > @@ -303,6 +313,15 @@ static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx)
> > goto fix;
> > }
> >
> > + /*
> > + * Don't do the following checks for inline_data because
> > + * other checks ensure the content of inline data right.
> > + */
> > + if (strncmp(EXT2_EXT_ATTR_NAME(entry),
> > + EXT4_EXT_ATTR_SYSTEM_DATA,
> > + strlen(EXT4_EXT_ATTR_SYSTEM_DATA)) == 0)
>
> Please align arguments 2 and 3 with argument 1 of strcmp.
Good catch. I will fix it.
Thanks,
- Zheng
>
> --D
> > + goto next;
> > +
> > /* attribute len eats this space */
> > remain -= EXT2_EXT_ATTR_SIZE(entry->e_name_len);
> >
> > @@ -330,6 +349,7 @@ static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx)
> > goto fix;
> > }
> >
> > +next:
> > remain -= entry->e_value_size;
> >
> > entry = EXT2_EXT_ATTR_NEXT(entry);
> > @@ -407,6 +427,7 @@ static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
> > blk64_t blk;
> > unsigned int i, rec_len, not_device = 0;
> > int extent_fs;
> > + int inlinedata_fs;
> >
> > /*
> > * If the mode looks OK, we believe it. If the first block in
> > @@ -434,11 +455,19 @@ static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
> > * For extent mapped files, we don't do any sanity checking:
> > * just try to get the phys block of logical block 0 and run
> > * with it.
> > + *
> > + * For inline_data files, we just skip it because, in e2fsck
> > + * pass1, we cannot get parent inode of a inode. So we have
> > + * no way to determine the inode is a directory or not.
> > */
> >
> > extent_fs = (ctx->fs->super->s_feature_incompat &
> > EXT3_FEATURE_INCOMPAT_EXTENTS);
> > - if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
> > + inlinedata_fs = (ctx->fs->super->s_feature_incompat &
> > + EXT4_FEATURE_INCOMPAT_INLINE_DATA);
> > + if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
> > + return;
> > + else if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
> > /* extent mapped */
> > if (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0,
> > &blk))
> > @@ -1205,7 +1234,8 @@ void e2fsck_pass1(e2fsck_t ctx)
> > ctx->fs_sockets_count++;
> > } else
> > mark_inode_bad(ctx, ino);
> > - if (!(inode->i_flags & EXT4_EXTENTS_FL)) {
> > + if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
> > + !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
> > if (inode->i_block[EXT2_IND_BLOCK])
> > ctx->fs_ind_count++;
> > if (inode->i_block[EXT2_DIND_BLOCK])
> > @@ -1214,6 +1244,7 @@ void e2fsck_pass1(e2fsck_t ctx)
> > ctx->fs_tind_count++;
> > }
> > if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
> > + !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
> > (inode->i_block[EXT2_IND_BLOCK] ||
> > inode->i_block[EXT2_DIND_BLOCK] ||
> > inode->i_block[EXT2_TIND_BLOCK] ||
> > @@ -2129,6 +2160,28 @@ static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
> > }
> >
> > /*
> > + * In fact we needn't check blocks for a inode that has inline data because
> > + * this inode doesn't have any blocks. In this function, all we need to do
> > + * is add this inode into dblist when it is a directory.
> > + */
> > +static void check_blocks_inline_data(e2fsck_t ctx,
> > + struct problem_context *pctx,
> > + struct process_block_struct *pb)
> > +{
> > + if (!pb->is_dir)
> > + return;
> > +
> > + pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist,
> > + pb->ino, 0, 0);
> > + if (pctx->errcode) {
> > + pctx->blk = 0;
> > + pctx->num = 0;
> > + fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
> > + ctx->flags |= E2F_FLAG_ABORT;
> > + }
> > +}
> > +
> > +/*
> > * This subroutine is called on each inode to account for all of the
> > * blocks used by that inode.
> > */
> > @@ -2142,6 +2195,7 @@ static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
> > int bad_size = 0;
> > int dirty_inode = 0;
> > int extent_fs;
> > + int inlinedata_fs;
> > __u64 size;
> >
> > pb.ino = ino;
> > @@ -2165,6 +2219,8 @@ static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
> >
> > extent_fs = (ctx->fs->super->s_feature_incompat &
> > EXT3_FEATURE_INCOMPAT_EXTENTS);
> > + inlinedata_fs = (ctx->fs->super->s_feature_incompat &
> > + EXT4_FEATURE_INCOMPAT_INLINE_DATA);
> >
> > if (inode->i_flags & EXT2_COMPRBLK_FL) {
> > if (fs->super->s_feature_incompat &
> > @@ -2188,6 +2244,9 @@ static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
> > if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
> > if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
> > check_blocks_extents(ctx, pctx, &pb);
> > + else if (inlinedata_fs &&
> > + (inode->i_flags & EXT4_INLINE_DATA_FL))
> > + check_blocks_inline_data(ctx, pctx, &pb);
> > else {
> > pctx->errcode = ext2fs_block_iterate3(fs, ino,
> > pb.is_dir ? BLOCK_FLAG_HOLE : 0,
> > @@ -2230,7 +2289,8 @@ static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
> > }
> > }
> >
> > - if (!pb.num_blocks && pb.is_dir) {
> > + if (!pb.num_blocks && pb.is_dir &&
> > + !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
> > if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
> > e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
> > ctx->fs_directory_count--;
> > @@ -2256,7 +2316,9 @@ static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
> > #endif
> > if (pb.is_dir) {
> > int nblock = inode->i_size >> EXT2_BLOCK_SIZE_BITS(fs->super);
> > - if (inode->i_size & (fs->blocksize - 1))
> > + if (inode->i_flags & EXT4_INLINE_DATA_FL)
> > + ;
> > + else if (inode->i_size & (fs->blocksize - 1))
> > bad_size = 5;
> > else if (nblock > (pb.last_block + 1))
> > bad_size = 1;
> > diff --git a/lib/ext2fs/dblist_dir.c b/lib/ext2fs/dblist_dir.c
> > index d4d5111..6282ab4 100644
> > --- a/lib/ext2fs/dblist_dir.c
> > +++ b/lib/ext2fs/dblist_dir.c
> > @@ -72,8 +72,14 @@ static int db_dir_proc(ext2_filsys fs, struct ext2_db_entry2 *db_info,
> > ctx->dir = db_info->ino;
> > ctx->errcode = 0;
> >
> > - ret = ext2fs_process_dir_block(fs, &db_info->blk,
> > - db_info->blockcnt, 0, 0, priv_data);
> > + if (ext2fs_inode_has_inline_data(fs, ctx->dir))
> > + ret = ext2fs_inline_data_iterate(fs, ctx->dir, 0, 0,
> > + ext2fs_process_dir_inline_data,
> > + priv_data);
> > + else
> > + ret = ext2fs_process_dir_block(fs, &db_info->blk,
> > + db_info->blockcnt,
> > + 0, 0, priv_data);
> > if ((ret & BLOCK_ABORT) && !ctx->errcode)
> > return DBLIST_ABORT;
> > return 0;
> > --
> > 1.7.9.7
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists