Make sure strsep() in statistic_release_def() finds a terminanal '\0' and
doesn't attempt to access bytes outside the given buffer.
(Patch fixes
statistics-infrastructure-simplify-statistics-debugfs-write-function.patch)
Patch is against 2.6.21-rc6-mm1.
Signed-off-by: Martin Peschke <[email protected]>
---
statistic.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Index: linux/lib/statistic.c
===================================================================
--- linux.orig/lib/statistic.c
+++ linux/lib/statistic.c
@@ -627,9 +627,10 @@ static ssize_t statistic_write_def(struc
return -EPIPE;
if (*offset + len > 16 * PAGE_SIZE)
return -ENOMEM;
- larger = kmalloc(*offset + len, GFP_KERNEL);
+ larger = kmalloc(*offset + len + 1, GFP_KERNEL);
if (!larger)
return -ENOMEM;
+ larger[*offset + len] = '\0';
memcpy(larger, seq_priv->w_buf, *offset);
if (copy_from_user(larger + *offset, buf, len))
return -EFAULT;
-
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