Hi Jiri,
On Thu, 3 Jan 2008, Jiri Slaby wrote:
> this happened, while playing with broken dvd.
[snip]
> Buffer I/O error on device sr0, logical block 5441
> end_request: I/O error, dev sr0, sector 136
> ISOFS: unable to read i-node block
> Unable to handle kernel NULL pointer dereference at 00000000000000ad RIP:
> [<ffffffff802a679f>] d_splice_alias+0x1f/0x100
[snip]
> Call Trace:
> [<ffffffff880d2395>] :isofs:isofs_lookup+0x395/0x4a0
> [<ffffffff802a565b>] d_alloc+0x2b/0x1d0
> [<ffffffff8029a97c>] do_lookup+0x1ac/0x200
Does the following patch fix it?
Pekka
[PATCH] isofs: check for bad inode in isofs_lookup
From: Pekka Enberg <[EMAIL PROTECTED]>
If isofs_read_inode() fails to read one of the inode blocks from disk, it
returns a bad inode.
Signed-off-by: Pekka Enberg <[EMAIL PROTECTED]>
---
fs/isofs/namei.c | 5 +++++
1 file changed, 5 insertions(+)
Index: linux-2.6/fs/isofs/namei.c
===================================================================
--- linux-2.6.orig/fs/isofs/namei.c
+++ linux-2.6/fs/isofs/namei.c
@@ -183,6 +183,11 @@ struct dentry *isofs_lookup(struct inode
unlock_kernel();
return ERR_PTR(-EACCES);
}
+ if (is_bad_inode(inode)) {
+ unlock_kernel();
+ iput(inode);
+ return ERR_PTR(-ENOENT);
+ }
}
unlock_kernel();
return d_splice_alias(inode, dentry);
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