This is a note to let you know that I've just added the patch titled NFS: nfs_set_pgio_error sometimes misses errors to the 3.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: nfs-nfs_set_pgio_error-sometimes-misses-errors.patch and it can be found in the queue-3.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From e9ae58aeee8842a50f7e199d602a5ccb2e41a95f Mon Sep 17 00:00:00 2001 From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx> Date: Mon, 17 Aug 2015 12:57:07 -0500 Subject: NFS: nfs_set_pgio_error sometimes misses errors From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx> commit e9ae58aeee8842a50f7e199d602a5ccb2e41a95f upstream. We should ensure that we always set the pgio_header's error field if a READ or WRITE RPC call returns an error. The current code depends on 'hdr->good_bytes' always being initialised to a large value, which is not always done correctly by callers. When this happens, applications may end up missing important errors. Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/nfs/pagelist.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -60,8 +60,8 @@ EXPORT_SYMBOL_GPL(nfs_pgheader_init); void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos) { spin_lock(&hdr->lock); - if (pos < hdr->io_start + hdr->good_bytes) { - set_bit(NFS_IOHDR_ERROR, &hdr->flags); + if (!test_and_set_bit(NFS_IOHDR_ERROR, &hdr->flags) + || pos < hdr->io_start + hdr->good_bytes) { clear_bit(NFS_IOHDR_EOF, &hdr->flags); hdr->good_bytes = pos - hdr->io_start; hdr->error = error; Patches currently in stable-queue which might be from trond.myklebust@xxxxxxxxxxxxxxx are queue-3.14/nfs-nfs_set_pgio_error-sometimes-misses-errors.patch queue-3.14/nfs-fix-a-null-pointer-dereference-of-migration-recovery-ops-for-v4.2-client.patch queue-3.14/sunrpc-xs_reset_transport-must-mark-the-connection-as-disconnected.patch queue-3.14/nfsv4-don-t-set-setattr-for-o_rdonly-o_excl.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html