| From | Jiri Slaby <> | Subject | [PATCH 3.12 02/84] reiserfs: fix "new_insert_key may be used uninitialized ..." | Date | Mon, 17 Oct 2016 09:50:49 +0200 |
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From: Jeff Mahoney <jeffm@suse.com>
3.12-stable review patch. If anyone has any objections, please let me know.
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commit 0a11b9aae49adf1f952427ef1a1d9e793dd6ffb6 upstream.
new_insert_key only makes any sense when it's associated with a new_insert_ptr, which is initialized to NULL and changed to a buffer_head when we also initialize new_insert_key. We can key off of that to avoid the uninitialized warning.
Link: http://lkml.kernel.org/r/5eca5ffb-2155-8df2-b4a2-f162f105efed@suse.com Signed-off-by: Jeff Mahoney <jeffm@suse.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Jan Kara <jack@suse.cz> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- fs/reiserfs/ibalance.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/reiserfs/ibalance.c b/fs/reiserfs/ibalance.c index e1978fd895f5..58cce0c606f1 100644 --- a/fs/reiserfs/ibalance.c +++ b/fs/reiserfs/ibalance.c @@ -1082,8 +1082,9 @@ int balance_internal(struct tree_balance *tb, /* tree_balance structure insert_ptr); } - memcpy(new_insert_key_addr, &new_insert_key, KEY_SIZE); insert_ptr[0] = new_insert_ptr; + if (new_insert_ptr) + memcpy(new_insert_key_addr, &new_insert_key, KEY_SIZE); return order; } -- 2.10.1
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