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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Jiangfeng Xiao <xiaojiangfeng@huawei.com>,
	"David S . Miller" <davem@davemloft.net>,
	Sasha Levin <sashal@kernel.org>,
	netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 55/68] net: hisilicon: make hip04_tx_reclaim non-reentrant
Date: Tue, 13 Aug 2019 22:15:33 -0400
Message-ID: <20190814021548.16001-55-sashal@kernel.org> (raw)
In-Reply-To: <20190814021548.16001-1-sashal@kernel.org>

From: Jiangfeng Xiao <xiaojiangfeng@huawei.com>

[ Upstream commit 1a2c070ae805910a853b4a14818481ed2e17c727 ]

If hip04_tx_reclaim is interrupted while it is running
and then __napi_schedule continues to execute
hip04_rx_poll->hip04_tx_reclaim, reentrancy occurs
and oops is generated. So you need to mask the interrupt
during the hip04_tx_reclaim run.

The kernel oops exception stack is as follows:

Unable to handle kernel NULL pointer dereference
at virtual address 00000050
pgd = c0003000
[00000050] *pgd=80000000a04003, *pmd=00000000
Internal error: Oops: 206 [#1] SMP ARM
Modules linked in: hip04_eth mtdblock mtd_blkdevs mtd
ohci_platform ehci_platform ohci_hcd ehci_hcd
vfat fat sd_mod usb_storage scsi_mod usbcore usb_common
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G           O    4.4.185 #1
Hardware name: Hisilicon A15
task: c0a250e0 task.stack: c0a00000
PC is at hip04_tx_reclaim+0xe0/0x17c [hip04_eth]
LR is at hip04_tx_reclaim+0x30/0x17c [hip04_eth]
pc : [<bf30c3a4>]    lr : [<bf30c2f4>]    psr: 600e0313
sp : c0a01d88  ip : 00000000  fp : c0601f9c
r10: 00000000  r9 : c3482380  r8 : 00000001
r7 : 00000000  r6 : 000000e1  r5 : c3482000  r4 : 0000000c
r3 : f2209800  r2 : 00000000  r1 : 00000000  r0 : 00000000
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 32c5387d  Table: 03d28c80  DAC: 55555555
Process swapper/0 (pid: 0, stack limit = 0xc0a00190)
Stack: (0xc0a01d88 to 0xc0a02000)
[<bf30c3a4>] (hip04_tx_reclaim [hip04_eth]) from [<bf30d2e0>]
                                                (hip04_rx_poll+0x88/0x368 [hip04_eth])
[<bf30d2e0>] (hip04_rx_poll [hip04_eth]) from [<c04c2d9c>] (net_rx_action+0x114/0x34c)
[<c04c2d9c>] (net_rx_action) from [<c021eed8>] (__do_softirq+0x218/0x318)
[<c021eed8>] (__do_softirq) from [<c021f284>] (irq_exit+0x88/0xac)
[<c021f284>] (irq_exit) from [<c0240090>] (msa_irq_exit+0x11c/0x1d4)
[<c0240090>] (msa_irq_exit) from [<c02677e0>] (__handle_domain_irq+0x110/0x148)
[<c02677e0>] (__handle_domain_irq) from [<c0201588>] (gic_handle_irq+0xd4/0x118)
[<c0201588>] (gic_handle_irq) from [<c0551700>] (__irq_svc+0x40/0x58)
Exception stack(0xc0a01f30 to 0xc0a01f78)
1f20:                                     c0ae8b40 00000000 00000000 00000000
1f40: 00000002 ffffe000 c0601f9c 00000000 ffffffff c0a2257c c0a22440 c0831a38
1f60: c0a01ec4 c0a01f80 c0203714 c0203718 600e0213 ffffffff
[<c0551700>] (__irq_svc) from [<c0203718>] (arch_cpu_idle+0x20/0x3c)
[<c0203718>] (arch_cpu_idle) from [<c025bfd8>] (cpu_startup_entry+0x244/0x29c)
[<c025bfd8>] (cpu_startup_entry) from [<c054b0d8>] (rest_init+0xc8/0x10c)
[<c054b0d8>] (rest_init) from [<c0800c58>] (start_kernel+0x468/0x514)
Code: a40599e5 016086e2 018088e2 7660efe6 (503090e5)
---[ end trace 1db21d6d09c49d74 ]---
Kernel panic - not syncing: Fatal exception in interrupt
CPU3: stopping
CPU: 3 PID: 0 Comm: swapper/3 Tainted: G      D    O    4.4.185 #1

Signed-off-by: Jiangfeng Xiao <xiaojiangfeng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/hisilicon/hip04_eth.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hip04_eth.c b/drivers/net/ethernet/hisilicon/hip04_eth.c
index 6127697ede120..57c0afa25f9fb 100644
--- a/drivers/net/ethernet/hisilicon/hip04_eth.c
+++ b/drivers/net/ethernet/hisilicon/hip04_eth.c
@@ -497,6 +497,9 @@ static int hip04_rx_poll(struct napi_struct *napi, int budget)
 	u16 len;
 	u32 err;
 
+	/* clean up tx descriptors */
+	tx_remaining = hip04_tx_reclaim(ndev, false);
+
 	while (cnt && !last) {
 		buf = priv->rx_buf[priv->rx_head];
 		skb = build_skb(buf, priv->rx_buf_size);
@@ -557,8 +560,7 @@ static int hip04_rx_poll(struct napi_struct *napi, int budget)
 	}
 	napi_complete_done(napi, rx);
 done:
-	/* clean up tx descriptors and start a new timer if necessary */
-	tx_remaining = hip04_tx_reclaim(ndev, false);
+	/* start a new timer if necessary */
 	if (rx < budget && tx_remaining)
 		hip04_start_tx_timer(priv);
 
-- 
2.20.1


  parent reply index

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-14  2:14 [PATCH AUTOSEL 4.19 01/68] iio: adc: max9611: Fix misuse of GENMASK macro Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 02/68] iio: cros_ec_accel_legacy: Fix incorrect channel setting Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 03/68] HID: Add 044f:b320 ThrustMaster, Inc. 2 in 1 DT Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 04/68] MIPS: kernel: only use i8253 clocksource with periodic clockevent Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 05/68] mips: fix cacheinfo Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 06/68] netfilter: ebtables: fix a memory leak bug in compat Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 07/68] ASoC: dapm: Fix handling of custom_stop_condition on DAPM graph walks Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 08/68] selftests/bpf: fix sendmsg6_prog on s390 Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 09/68] bonding: Force slave speed check after link state recovery for 802.3ad Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 10/68] net: mvpp2: Don't check for 3 consecutive Idle frames for 10G links Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 11/68] selftests: forwarding: gre_multipath: Enable IPv4 forwarding Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 12/68] selftests: forwarding: gre_multipath: Fix flower filters Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 13/68] can: dev: call netif_carrier_off() in register_candev() Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 14/68] can: mcp251x: add error check when wq alloc failed Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 15/68] can: gw: Fix error path of cgw_module_init Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 16/68] ASoC: Fail card instantiation if DAI format setup fails Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 17/68] st21nfca_connectivity_event_received: null check the allocation Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 18/68] st_nci_hci_connectivity_event_received: " Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 19/68] ASoC: rockchip: Fix mono capture Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 20/68] ASoC: ti: davinci-mcasp: Correct slot_width posed constraint Sasha Levin
2019-08-14  2:14 ` [PATCH AUTOSEL 4.19 21/68] net: usb: qmi_wwan: Add the BroadMobi BM818 card Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 22/68] qed: RDMA - Fix the hw_ver returned in device attributes Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 23/68] isdn: mISDN: hfcsusb: Fix possible null-pointer dereferences in start_isoc_chain() Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 24/68] mac80211_hwsim: Fix possible null-pointer dereferences in hwsim_dump_radio_nl() Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 25/68] netfilter: ipset: Actually allow destination MAC address for hash:ip,mac sets too Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 26/68] netfilter: ipset: Copy the right MAC address in bitmap:ip,mac and hash:ip,mac sets Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 27/68] netfilter: ipset: Fix rename concurrency with listing Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 28/68] netfilter: ebtables: also count base chain policies Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 29/68] rxrpc: Fix potential deadlock Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 30/68] rxrpc: Fix the lack of notification when sendmsg() fails on a DATA packet Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 31/68] driver core: Fix use-after-free and double free on glue directory Sasha Levin
2019-08-14  7:36   ` Greg Kroah-Hartman
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 32/68] isdn: hfcsusb: Fix mISDN driver crash caused by transfer buffer on the stack Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 33/68] net: phy: phy_led_triggers: Fix a possible null-pointer dereference in phy_led_trigger_change_speed() Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 34/68] perf bench numa: Fix cpu0 binding Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 35/68] Input: kbtab - sanity check for endpoint type Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 36/68] net: usb: pegasus: fix improper read if get_registers() fail Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 37/68] can: sja1000: force the string buffer NULL-terminated Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 38/68] can: peak_usb: " Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 39/68] net/ethernet/qlogic/qed: " Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 40/68] NFSv4: Fix a potential sleep while atomic in nfs4_do_reclaim() Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 41/68] NFS: Fix regression whereby fscache errors are appearing on 'nofsc' mounts Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 42/68] HID: quirks: Set the INCREMENT_USAGE_ON_DUPLICATE quirk on Saitek X52 Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 43/68] HID: holtek: test for sanity of intfdata Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 44/68] HID: input: fix a4tech horizontal wheel custom usage Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 45/68] drm/rockchip: Suspend DP late Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 46/68] SMB3: Fix potential memory leak when processing compound chain Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 47/68] SMB3: Kernel oops mounting a encryptData share with CONFIG_DEBUG_VIRTUAL Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 48/68] HID: hiddev: avoid opening a disconnected device Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 49/68] HID: hiddev: do cleanup in failure of opening a device Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 50/68] s390: put _stext and _etext into .text section Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 51/68] Input: iforce - add sanity checks Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 52/68] net: cxgb3_main: Fix a resource leak in a error path in 'init_one()' Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 53/68] net: stmmac: Fix issues when number of Queues >= 4 Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 54/68] net: stmmac: tc: Do not return a fragment entry Sasha Levin
2019-08-14  2:15 ` Sasha Levin [this message]
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 56/68] net: hisilicon: fix hip04-xmit never return TX_BUSY Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 57/68] net: hisilicon: Fix dma_map_single failed on arm64 Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 58/68] libata: have ata_scsi_rw_xlat() fail invalid passthrough requests Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 59/68] libata: add SG safety checks in SFF pio transfers Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 60/68] x86/lib/cpu: Address missing prototypes warning Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 61/68] drm/vmwgfx: fix memory leak when too many retries have occurred Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 62/68] block, bfq: handle NULL return value by bfq_init_rq() Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 63/68] perf ftrace: Fix failure to set cpumask when only one cpu is present Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 64/68] perf cpumap: Fix writing to illegal memory in handling cpumap mask Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 65/68] perf pmu-events: Fix missing "cpu_clk_unhalted.core" event Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 66/68] KVM: arm64: Don't write junk to sysregs on reset Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 67/68] KVM: arm: Don't write junk to CP15 registers " Sasha Levin
2019-08-14  2:15 ` [PATCH AUTOSEL 4.19 68/68] selftests: kvm: Adding config fragments Sasha Levin

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