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Subject[PATCH 3/8] dm: prevent possible buffer overflow in ioctl interface
Use the correct size for "name" in register_with_devfs().

During Al Viro's devfs cleanup a few versions ago, this function was
rewritten, and the "name" string added. The 32-byte size is not large
enough to prevent a possible buffer overflow in the sprintf() call,
since the hash cell can have a name up to 128 characters.

[Kevin Corry]

--- diff/drivers/md/dm-ioctl.c 2003-02-26 16:09:42.000000000 +0000
+++ source/drivers/md/dm-ioctl.c 2003-02-26 16:09:52.000000000 +0000
@@ -173,7 +173,7 @@
static int register_with_devfs(struct hash_cell *hc)
- char name[32];
+ char name[DM_NAME_LEN + strlen(DM_DIR) + 1];
struct gendisk *disk = dm_disk(hc->md);

sprintf(name, DM_DIR "/%s", hc->name);
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