From 9579d79f10d42ce275c94b945a3df2f5173d8041 Mon Sep 17 00:00:00 2001 From: Massimo Cirillo Date: Thu, 27 Aug 2009 10:44:09 +0200 Subject: [PATCH] JFFS2: add missing verify buffer allocation/deallocation commit bc8cec0dff072f1a45ce7f6b2c5234bb3411ac51 upstream. The function jffs2_nor_wbuf_flash_setup() doesn't allocate the verify buffer if CONFIG_JFFS2_FS_WBUF_VERIFY is defined, so causing a kernel panic when that macro is enabled and the verify function is called. Similarly the jffs2_nor_wbuf_flash_cleanup() must free the buffer if CONFIG_JFFS2_FS_WBUF_VERIFY is enabled. The following patch fixes the problem. The following patch applies to 2.6.30 kernel. Signed-off-by: Massimo Cirillo Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse Signed-off-by: Greg Kroah-Hartman --- fs/jffs2/wbuf.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c index 0e78b00035e4..4d89e5f3e04f 100644 --- a/fs/jffs2/wbuf.c +++ b/fs/jffs2/wbuf.c @@ -1271,10 +1271,20 @@ int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c) { if (!c->wbuf) return -ENOMEM; +#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY + c->wbuf_verify = kmalloc(c->wbuf_pagesize, GFP_KERNEL); + if (!c->wbuf_verify) { + kfree(c->wbuf); + return -ENOMEM; + } +#endif return 0; } void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c) { +#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY + kfree(c->wbuf_verify); +#endif kfree(c->wbuf); } -- 2.39.2