The patch titled
jbd: replace potentially false assertion with if block
has been added to the -mm tree. Its filename is
jbd-replace-potentially-false-assertion-with-if-block.patch
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------------------------------------------------------
Subject: jbd: replace potentially false assertion with if block
From: "Duane Griffin" <duaneg@xxxxxxxxx>
If an error occurs during jbd cache initialisation it is possible for the
journal_head_cache to be NULL when journal_destroy_journal_head_cache is
called. Replace the J_ASSERT with an if block to handle the situation
correctly.
Note that even with this fix things will break badly if ext3 is statically
compiled in and cache initialisation fails.
At the moment the cache destruction methods are inconsistent in whether they
set the cache pointers to NULL after destroying them. To be precise,
journal_destroy_handle_cache doesn't, the others do. I haven't changed that,
although I was sorely tempted. I think it would be better to be consistent
and that NULLing the pointers is preferable.
Signed-off-by: Duane Griffin <duaneg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/jbd/journal.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff -puN fs/jbd/journal.c~jbd-replace-potentially-false-assertion-with-if-block fs/jbd/journal.c
--- a/fs/jbd/journal.c~jbd-replace-potentially-false-assertion-with-if-block
+++ a/fs/jbd/journal.c
@@ -1635,9 +1635,10 @@ static int journal_init_journal_head_cac
static void journal_destroy_journal_head_cache(void)
{
- J_ASSERT(journal_head_cache != NULL);
- kmem_cache_destroy(journal_head_cache);
- journal_head_cache = NULL;
+ if (journal_head_cache) {
+ kmem_cache_destroy(journal_head_cache);
+ journal_head_cache = NULL;
+ }
}
/*
_
Patches currently in -mm which might be from duaneg@xxxxxxxxx are
jbd-eliminate-duplicated-code-in-revocation-table-init-destroy-functions.patch
jbd-replace-potentially-false-assertion-with-if-block.patch
jbd-only-create-debugfs-entries-if-cache-initialisation-is-successful.patch
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