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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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
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 jbd is statically
compiled in and cache initialisation fails.
Signed-off-by: Duane Griffin <duaneg@xxxxxxxxx
Cc: <linux-ext4@xxxxxxxxxxxxxxx>
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
@@ -1636,9 +1636,10 @@ 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-tidy-up-revoke-cache-initialisation-and-destruction.patch
jbd-replace-potentially-false-assertion-with-if-block.patch
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