[PATCH] 2.4.21-pre4 seq_read() fix backport

From: Eric Sandeen (sandeen@sgi.com)
Date: Fri Jan 31 2003 - 08:52:30 EST

Al Viro fixed a bug in seq_read for 2.5.31, still needs to be
backported to 2.4.x. Allows uninitialized data to be read, I think.

You can observe this by adding many (75+, I think) lvm volumes
and do a cat of "/proc/partitions" with slab debugging turned on.

http://linux.bkbits.net:8080/linux-2.5/diffs/fs/seq_file.c@1.5?nav=index.html|src/|src/fs|hist/fs/seq_file.c

--- 1.4/fs/seq_file.c Wed May 22 05:44:20 2002
+++ 1.5/fs/seq_file.c Thu Aug 8 23:46:33 2002
@@ -94,8 +94,10 @@
                 m->buf = kmalloc(m->size <<= 1, GFP_KERNEL);
                 if (!m->buf)
                         goto Enomem;
+ m->count = 0;
         }
         m->op->stop(m, p);
+ m->count = 0;
         goto Done;
 Fill:
         /* they want more? let's try to get some more */

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This archive was generated by hypermail 2b29 : Fri Jan 31 2003 - 22:00:25 EST