From: Oleg Drokin <green@linuxhacker.ru>
Thanks to Standford guys, a case where reiserfs can dereference NULL
pointer if memory allocation fail during mount was identified.
---
25-akpm/fs/reiserfs/journal.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff -puN fs/reiserfs/journal.c~make-reiserfs-not-to-crash-on-oom fs/reiserfs/journal.c
--- 25/fs/reiserfs/journal.c~make-reiserfs-not-to-crash-on-oom 2004-05-12 21:02:45.137683936 -0700
+++ 25-akpm/fs/reiserfs/journal.c 2004-05-12 21:02:45.144682872 -0700
@@ -2263,8 +2263,10 @@ int journal_init(struct super_block *p_s
INIT_LIST_HEAD (&SB_JOURNAL(p_s_sb)->j_prealloc_list);
INIT_LIST_HEAD(&SB_JOURNAL(p_s_sb)->j_working_list);
INIT_LIST_HEAD(&SB_JOURNAL(p_s_sb)->j_journal_list);
- reiserfs_allocate_list_bitmaps(p_s_sb, SB_JOURNAL(p_s_sb)->j_list_bitmap,
- SB_BMAP_NR(p_s_sb)) ;
+ if (reiserfs_allocate_list_bitmaps(p_s_sb,
+ SB_JOURNAL(p_s_sb)->j_list_bitmap,
+ SB_BMAP_NR(p_s_sb)))
+ goto free_and_return ;
allocate_bitmap_nodes(p_s_sb) ;
/* reserved for journal area support */
_