From: Santosh Shilimkar <santosh.shilimkar@xxxxxxxxxx> Date: Mon, 18 Dec 2017 08:28:05 -0800 > On 12/18/2017 12:43 AM, syzbot wrote: >> Hello, >> syzkaller hit the following crash on >> 6084b576dca2e898f5c101baef151f7bfdbb606d >> git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master >> compiler: gcc (GCC) 7.1.1 20170620 >> .config is attached >> Raw console output is attached. >> Unfortunately, I don't have any reproducer for this bug yet. >> BUG: unable to handle kernel NULL pointer dereference at >> 0000000000000028 >> program syz-executor6 is using a deprecated SCSI ioctl, please convert >> it to SG_IO >> IP: rds_send_xmit+0x80/0x930 net/rds/send.c:186 > > Looks like another one tripping on empty transport. Mostly below > should > address it but we will test it if it does. > > diff --git a/net/rds/send.c b/net/rds/send.c > index 7244d2e..e2d0eaa 100644 > --- a/net/rds/send.c > +++ b/net/rds/send.c > @@ -183,7 +183,7 @@ int rds_send_xmit(struct rds_conn_path *cp) > goto out; > } > > - if (conn->c_trans->xmit_path_prepare) > + if (conn->c_trans && conn->c_trans->xmit_path_prepare) > conn->c_trans->xmit_path_prepare(cp); We're seeming to accumulate a lot of checks like this, maybe there is a more general way to deal with this problem? -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
