From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
"Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>,
Johan Almbladh <johan.almbladh@anyfinetworks.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Song Liu <songliubraving@fb.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Subject: [PATCH 4.9 04/20] powerpc/bpf: Fix BPF_MOD when imm == 1
Date: Mon, 1 Nov 2021 10:17:13 +0100 [thread overview]
Message-ID: <20211101082445.140331093@linuxfoundation.org> (raw)
In-Reply-To: <20211101082444.133899096@linuxfoundation.org>
From: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
commit 8bbc9d822421d9ac8ff9ed26a3713c9afc69d6c8 upstream.
Only ignore the operation if dividing by 1.
Fixes: 156d0e290e969c ("powerpc/ebpf/jit: Implement JIT compiler for extended BPF")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Tested-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c674ca18c3046885602caebb326213731c675d06.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
[cascardo: use PPC_LI instead of EMIT(PPC_RAW_LI)]
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/powerpc/net/bpf_jit_comp64.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/arch/powerpc/net/bpf_jit_comp64.c
+++ b/arch/powerpc/net/bpf_jit_comp64.c
@@ -430,8 +430,14 @@ static int bpf_jit_build_body(struct bpf
case BPF_ALU64 | BPF_DIV | BPF_K: /* dst /= imm */
if (imm == 0)
return -EINVAL;
- else if (imm == 1)
- goto bpf_alu32_trunc;
+ if (imm == 1) {
+ if (BPF_OP(code) == BPF_DIV) {
+ goto bpf_alu32_trunc;
+ } else {
+ PPC_LI(dst_reg, 0);
+ break;
+ }
+ }
PPC_LI32(b2p[TMP_REG_1], imm);
switch (BPF_CLASS(code)) {
next prev parent reply other threads:[~2021-11-01 9:21 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-01 9:17 [PATCH 4.9 00/20] 4.9.289-rc1 review Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 01/20] ARM: 9133/1: mm: proc-macros: ensure *_tlb_fns are 4B aligned Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 02/20] ARM: 9134/1: remove duplicate memcpy() definition Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 03/20] ARM: 9139/1: kprobes: fix arch_init_kprobes() prototype Greg Kroah-Hartman
2021-11-01 9:17 ` Greg Kroah-Hartman [this message]
2021-11-01 9:17 ` [PATCH 4.9 05/20] ARM: 8819/1: Remove -p from LDFLAGS Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 06/20] usbnet: sanity check for maxpacket Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 07/20] usbnet: fix error return code in usbnet_probe() Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 08/20] ata: sata_mv: Fix the error handling of mv_chip_id() Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 09/20] nfc: port100: fix using -ERRNO as command type mask Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 10/20] Revert "net: mdiobus: Fix memory leak in __mdiobus_register" Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 11/20] mmc: vub300: fix control-message timeouts Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 12/20] mmc: dw_mmc: exynos: fix the finding clock sample value Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 13/20] mmc: sdhci: Map more voltage level to SDHCI_POWER_330 Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 14/20] net: lan78xx: fix division by zero in send path Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 15/20] regmap: Fix possible double-free in regcache_rbtree_exit() Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 16/20] net: batman-adv: fix error handling Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 17/20] nios2: Make NIOS2_DTB_SOURCE_BOOL depend on !COMPILE_TEST Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 18/20] net: nxp: lpc_eth.c: avoid hang when bringing interface down Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 19/20] sctp: use init_tag from inithdr for ABORT chunk Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.9 20/20] sctp: add vtag check in sctp_sf_violation Greg Kroah-Hartman
2021-11-01 21:22 ` [PATCH 4.9 00/20] 4.9.289-rc1 review Shuah Khan
2021-11-01 23:35 ` Guenter Roeck
2021-11-02 8:36 ` Naresh Kamboju
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