diff options
authorAnton Blanchard <>2012-03-16 10:28:19 +0000
committerLinus Torvalds <>2012-03-16 17:01:41 -0700
commitc0173863528a8c9212c53e080d63a1aaae5ef4f4 (patch)
parent2c724fb92732c0b2a5629eb8af74e82eb62ac947 (diff)
afs: Remote abort can cause BUG in rxrpc code
When writing files to afs I sometimes hit a BUG: kernel BUG at fs/afs/rxrpc.c:179! With a backtrace of: afs_free_call afs_make_call afs_fs_store_data afs_vnode_store_data afs_write_back_from_locked_page afs_writepages_region afs_writepages The cause is: ASSERT(skb_queue_empty(&call->rx_queue)); Looking at a tcpdump of the session the abort happens because we are exceeding our disk quota: rx abort fs reply store-data error diskquota exceeded (32) So the abort error is valid. We hit the BUG because we haven't freed all the resources for the call. By freeing any skbs in call->rx_queue before calling afs_free_call we avoid hitting leaking memory and avoid hitting the BUG. Signed-off-by: Anton Blanchard <> Signed-off-by: David Howells <> Cc: <> Signed-off-by: Linus Torvalds <>
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index e45a323aebb4..8ad8c2a0703a 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -314,6 +314,7 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
struct msghdr msg;
struct kvec iov[1];
int ret;
+ struct sk_buff *skb;
_enter("%x,{%d},", addr->s_addr, ntohs(call->port));
@@ -380,6 +381,8 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
rxrpc_kernel_abort_call(rxcall, RX_USER_ABORT);
+ while ((skb = skb_dequeue(&call->rx_queue)))
+ afs_free_skb(skb);
call->rxcall = NULL;