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authorDavid Woodhouse <David.Woodhouse@intel.com>2009-12-16 03:27:20 +0000
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-12-16 03:27:20 +0000
commit2e16cfca6e17ae37ae21feca080a6f2eca9087dc (patch)
tree6474bcbf5d7f79d359b07fd187093beb4b8b489d /fs/jffs2
parent0a032a4df6dc4a82bcd1c401e57ee71825d30c14 (diff)
jffs2: Fix long-standing bug with symlink garbage collection.
Ever since jffs2_garbage_collect_metadata() was first half-written in February 2001, it's been broken on architectures where 'char' is signed. When garbage collecting a symlink with target length above 127, the payload length would end up negative, causing interesting and bad things to happen. Cc: stable@kernel.org Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'fs/jffs2')
-rw-r--r--fs/jffs2/gc.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c
index 090c556ffed..3b6f2fa12cf 100644
--- a/fs/jffs2/gc.c
+++ b/fs/jffs2/gc.c
@@ -700,7 +700,8 @@ static int jffs2_garbage_collect_metadata(struct jffs2_sb_info *c, struct jffs2_
struct jffs2_raw_inode ri;
struct jffs2_node_frag *last_frag;
union jffs2_device_node dev;
- char *mdata = NULL, mdatalen = 0;
+ char *mdata = NULL;
+ int mdatalen = 0;
uint32_t alloclen, ilen;
int ret;