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| author | Adam Thomas <adamthomas1111@gmail.com> | 2013-02-02 22:32:31 +0000 |
|---|---|---|
| committer | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2013-02-04 12:31:00 +0200 |
| commit | 2928f0d0c5ebd6c9605c0d98207a44376387c298 (patch) | |
| tree | e15d676a7c9f493853c0fbbab1ed2e71cf5fc0c6 /fs/ubifs/ubifs.h | |
| parent | 3d251a5b9e2f09edcf25bbffe1fa308d0f648bf1 (diff) | |
| download | linux-2928f0d0c5ebd6c9605c0d98207a44376387c298.tar.gz linux-2928f0d0c5ebd6c9605c0d98207a44376387c298.tar.bz2 linux-2928f0d0c5ebd6c9605c0d98207a44376387c298.zip | |
UBIFS: fix use of freed ubifs_orphan objects
The last orphan in the cnext list has its cnext set to NULL. Because
of that, ubifs_delete_orphan assumes that it is not on the cnext list
and frees it immediately instead of adding it to the dnext list. The
freed orphan is later modified by write_orph_node.
This can cause various inconsistencies including directory entries
that cannot be removed and this error:
UBIFS error (pid 20685): layout_cnodes: LPT out of space at LEB 14:129009 needing 17, done_ltab 1, done_lsave 1
This is a regression introduced by
"7074e5eb UBIFS: remove invalid reference to list iterator variable".
This change adds an explicit flag to ubifs_orphan indicating whether
it is pending commit.
Signed-off-by: Adam Thomas <adamthomas1111@gmail.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v3.6+
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Diffstat (limited to 'fs/ubifs/ubifs.h')
| -rw-r--r-- | fs/ubifs/ubifs.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h index d133c276fe05..c16fff7271d3 100644 --- a/fs/ubifs/ubifs.h +++ b/fs/ubifs/ubifs.h @@ -904,6 +904,7 @@ struct ubifs_budget_req { * @dnext: next orphan to delete * @inum: inode number * @new: %1 => added since the last commit, otherwise %0 + * @cmt: %1 => commit pending, otherwise %0 */ struct ubifs_orphan { struct rb_node rb; @@ -912,7 +913,8 @@ struct ubifs_orphan { struct ubifs_orphan *cnext; struct ubifs_orphan *dnext; ino_t inum; - int new; + unsigned new:1; + unsigned cmt:1; }; /** |