netdev - [PATCH net-next 14/15] nfp: bpf: byte swap the instructions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20171009040417.22172-15-jakub.kicinski@netronome.com>
Date:   Sun,  8 Oct 2017 21:04:16 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     netdev@...r.kernel.org
Cc:     oss-drivers@...ronome.com,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH net-next 14/15] nfp: bpf: byte swap the instructions

Device expects the instructions in little endian.  Make sure we
byte swap on big endian hosts.

Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Reviewed-by: Simon Horman <simon.horman@...ronome.com>
---
 drivers/net/ethernet/netronome/nfp/bpf/jit.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
index e0600d037773..f68052367db7 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
@@ -1725,7 +1725,7 @@ static int nfp_bpf_optimize(struct nfp_prog *nfp_prog)
 	return 0;
 }
 
-static int nfp_bpf_ustore_calc(struct nfp_prog *nfp_prog)
+static int nfp_bpf_ustore_calc(struct nfp_prog *nfp_prog, __le64 *ustore)
 {
 	int i;
 
@@ -1737,6 +1737,8 @@ static int nfp_bpf_ustore_calc(struct nfp_prog *nfp_prog)
 			return err;
 
 		nfp_prog->prog[i] = nfp_ustore_calc_ecc_insn(nfp_prog->prog[i]);
+
+		ustore[i] = cpu_to_le64(nfp_prog->prog[i]);
 	}
 
 	return 0;
@@ -1796,7 +1798,7 @@ nfp_bpf_jit(struct bpf_prog *filter, void *prog_mem,
 		goto out;
 	}
 
-	ret = nfp_bpf_ustore_calc(nfp_prog);
+	ret = nfp_bpf_ustore_calc(nfp_prog, (__force __le64 *)prog_mem);
 
 	res->n_instr = nfp_prog->prog_len;
 	res->dense_mode = false;
-- 
2.14.1