>>>>> "ADLab" == ADLab <[email protected]> writes:
ADLab> Advisory: [AD_LAB-06011] Linux kernel Filesystem Mount Dead
ADLab> Loop Class: Design Error
Would a simple fix like this one (untested) work?
Check that the requested block fits in the device.
Fix for advisory AD_LAB-06011 Linux kernel Filesystem Mount Dead Loop.
Signed-off-by: Samuel Tardieu <[email protected]>
diff -r db51efd75e66 fs/buffer.c
--- a/fs/buffer.c Sun Sep 10 01:02:33 2006 +0200
+++ b/fs/buffer.c Tue Sep 12 17:54:13 2006 +0200
@@ -1456,7 +1456,17 @@ struct buffer_head *
struct buffer_head *
__getblk(struct block_device *bdev, sector_t block, int size)
{
- struct buffer_head *bh = __find_get_block(bdev, block, size);
+ struct buffer_head *bh;
+ char b[BDEVNAME_SIZE];
+
+ if (block >= bdev->bd_disk->capacity) {
+ printk(KERN_ERR "Invalid block number %Ld requested on device %s",
+ (unsigned long long)block,
+ bdevname(bdev, b));
+ return NULL;
+ }
+
+ bh = __find_get_block(bdev, block, size);
might_sleep();
if (bh == NULL)
-
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