linux-kernel - [PATCH] nfsd: fix buffer overrun decoding NFSv4 acl

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Date:	Mon,  1 Sep 2008 14:51:02 -0400
From:	"J. Bruce Fields" <bfields@...i.umich.edu>
To:	stable@...nel.org
Cc:	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org,
	"J. Bruce Fields" <bfields@...i.umich.edu>,
	David Richter <richterd@...i.umich.edu>
Subject: [PATCH] nfsd: fix buffer overrun decoding NFSv4 acl

The array we kmalloc() here is not large enough.

Thanks to Johann Dahm and David Richter for bug report and testing.

Signed-off-by: J. Bruce Fields <bfields@...i.umich.edu>
Cc: David Richter <richterd@...i.umich.edu>
Tested-by: Johann Dahm <jdahm@...ch.edu>
---
 fs/nfsd/nfs4acl.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c
index b6ed383..54b8b41 100644
--- a/fs/nfsd/nfs4acl.c
+++ b/fs/nfsd/nfs4acl.c
@@ -443,7 +443,7 @@ init_state(struct posix_acl_state *state, int cnt)
 	 * enough space for either:
 	 */
 	alloc = sizeof(struct posix_ace_state_array)
-		+ cnt*sizeof(struct posix_ace_state);
+		+ cnt*sizeof(struct posix_user_ace_state);
 	state->users = kzalloc(alloc, GFP_KERNEL);
 	if (!state->users)
 		return -ENOMEM;
-- 
1.5.5.rc1

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