After 9074815 xfs: better xfs_trans_alloc interface, mv_orphanage
was passing an uninitialized *tp into libxfs_dir_lookup, because
the trans_alloc() call which was present prior to the call got
removed in that commit.
This ultimately led to testing an uninit tp var:
Conditional jump or move depends on uninitialised value(s)
at 0x434D01: libxfs_trans_read_buf_map (trans.c:554)
by 0x45152E: libxfs_da_read_buf (xfs_da_btree.c:2610)
by 0x456ACB: xfs_dir3_block_read (xfs_dir2_block.c:136)
by 0x4570A8: xfs_dir2_block_lookup_int (xfs_dir2_block.c:675)
by 0x457DB7: xfs_dir2_block_lookup (xfs_dir2_block.c:623)
by 0x455F54: libxfs_dir_lookup (xfs_dir2.c:399)
by 0x421C46: mv_orphanage (phase6.c:1095)
by 0x4222C2: check_for_orphaned_inodes (phase6.c:3108)
by 0x423ABD: phase6 (phase6.c:3287)
by 0x42E4B2: main (xfs_repair.c:933)
and ended with a segfault as we tried to use that tp when
searching for the buffer in xfs_trans_buf_item_match():
list_for_each_entry(lidp, &tp->t_items, lid_trans) {
I think simply passing in NULL for this tp is sufficient to fix
this; we'll just go read the buffer from disk in
libxfs_trans_read_buf_map rather than trying to find it in an
existing transaction.
Reported-by: Consigliere <admin@xxxxxxxxxxxxxx>
Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
---
diff --git a/repair/phase6.c b/repair/phase6.c
index 973a5f8..5507af4 100644
--- a/repair/phase6.c
+++ b/repair/phase6.c
@@ -1092,7 +1092,7 @@ mv_orphanage(
irec->ino_startnum;
nres = XFS_DIRENTER_SPACE_RES(mp, fnamelen) +
XFS_DIRENTER_SPACE_RES(mp, 2);
- err = -libxfs_dir_lookup(tp, ino_p, &xfs_name_dotdot,
+ err = -libxfs_dir_lookup(NULL, ino_p, &xfs_name_dotdot,
&entry_ino_num, NULL);
if (err) {
ASSERT(err == ENOENT);
--
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