From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Javed Hasan <jhasan@marvell.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.10 27/57] scsi: libfc: Avoid invoking response handler twice if ep is already completed
Date: Fri, 5 Feb 2021 15:06:53 +0100 [thread overview]
Message-ID: <20210205140657.137294776@linuxfoundation.org> (raw)
In-Reply-To: <20210205140655.982616732@linuxfoundation.org>
From: Javed Hasan <jhasan@marvell.com>
[ Upstream commit b2b0f16fa65e910a3ec8771206bb49ee87a54ac5 ]
A race condition exists between the response handler getting called because
of exchange_mgr_reset() (which clears out all the active XIDs) and the
response we get via an interrupt.
Sequence of events:
rport ba0200: Port timeout, state PLOGI
rport ba0200: Port entered PLOGI state from PLOGI state
xid 1052: Exchange timer armed : 20000 msecs xid timer armed here
rport ba0200: Received LOGO request while in state PLOGI
rport ba0200: Delete port
rport ba0200: work event 3
rport ba0200: lld callback ev 3
bnx2fc: rport_event_hdlr: event = 3, port_id = 0xba0200
bnx2fc: ba0200 - rport not created Yet!!
/* Here we reset any outstanding exchanges before
freeing rport using the exch_mgr_reset() */
xid 1052: Exchange timer canceled
/* Here we got two responses for one xid */
xid 1052: invoking resp(), esb 20000000 state 3
xid 1052: invoking resp(), esb 20000000 state 3
xid 1052: fc_rport_plogi_resp() : ep->resp_active 2
xid 1052: fc_rport_plogi_resp() : ep->resp_active 2
Skip the response if the exchange is already completed.
Link: https://lore.kernel.org/r/20201215194731.2326-1-jhasan@marvell.com
Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/libfc/fc_exch.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 96a2952cf626b..a50f1eef0e0cd 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -1624,8 +1624,13 @@ static void fc_exch_recv_seq_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
rc = fc_exch_done_locked(ep);
WARN_ON(fc_seq_exch(sp) != ep);
spin_unlock_bh(&ep->ex_lock);
- if (!rc)
+ if (!rc) {
fc_exch_delete(ep);
+ } else {
+ FC_EXCH_DBG(ep, "ep is completed already,"
+ "hence skip calling the resp\n");
+ goto skip_resp;
+ }
}
/*
@@ -1644,6 +1649,7 @@ static void fc_exch_recv_seq_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
if (!fc_invoke_resp(ep, sp, fp))
fc_frame_free(fp);
+skip_resp:
fc_exch_release(ep);
return;
rel:
@@ -1900,10 +1906,16 @@ static void fc_exch_reset(struct fc_exch *ep)
fc_exch_hold(ep);
- if (!rc)
+ if (!rc) {
fc_exch_delete(ep);
+ } else {
+ FC_EXCH_DBG(ep, "ep is completed already,"
+ "hence skip calling the resp\n");
+ goto skip_resp;
+ }
fc_invoke_resp(ep, sp, ERR_PTR(-FC_EX_CLOSED));
+skip_resp:
fc_seq_set_resp(sp, NULL, ep->arg);
fc_exch_release(ep);
}
--
2.27.0
next prev parent reply other threads:[~2021-02-05 19:10 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 14:06 [PATCH 5.10 00/57] 5.10.14-rc1 review Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 01/57] net: dsa: microchip: Adjust reset release timing to match reference reset circuit Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 02/57] net: stmmac: dwmac-intel-plat: remove config data on error Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 03/57] net: fec: put child node on error path Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 04/57] net: octeontx2: Make sure the buffer is 128 byte aligned Greg Kroah-Hartman
2021-02-07 9:20 ` Pavel Machek
2021-02-07 10:39 ` Kevin Hao
2021-02-05 14:06 ` [PATCH 5.10 05/57] stmmac: intel: Configure EHL PSE0 GbE and PSE1 GbE to 32 bits DMA addressing Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 06/57] mlxsw: spectrum_span: Do not overwrite policer configuration Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 07/57] net: dsa: bcm_sf2: put device node before return Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 08/57] net: switchdev: dont set port_obj_info->handled true when -EOPNOTSUPP Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 09/57] ibmvnic: Ensure that CRQ entry read are correctly ordered Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 10/57] iommu/io-pgtable-arm: Support coherency for Mali LPAE Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 11/57] drm/panfrost: Support cache-coherent integrations Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 12/57] arm64: dts: meson: Describe G12b GPU as coherent Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 13/57] arm64: Fix kernel address detection of __is_lm_address() Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 14/57] arm64: Do not pass tagged addresses to __is_lm_address() Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 15/57] Revert "x86/setup: dont remove E820_TYPE_RAM for pfn 0" Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 16/57] ARM: 9025/1: Kconfig: CPU_BIG_ENDIAN depends on !LD_IS_LLD Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 17/57] iommu/vt-d: Do not use flush-queue when caching-mode is on Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 18/57] phy: cpcap-usb: Fix warning for missing regulator_disable Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 19/57] tools/power/x86/intel-speed-select: Set scaling_max_freq to base_frequency Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 20/57] tools/power/x86/intel-speed-select: Set higher of cpuinfo_max_freq or base_frequency Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 21/57] platform/x86: touchscreen_dmi: Add swap-x-y quirk for Goodix touchscreen on Estar Beauty HD tablet Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 22/57] platform/x86: intel-vbtn: Support for tablet mode on Dell Inspiron 7352 Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 23/57] habanalabs: fix dma_addr passed to dma_mmap_coherent Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 24/57] locking/lockdep: Avoid noinstr warning for DEBUG_LOCKDEP Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 25/57] x86: __always_inline __{rd,wr}msr() Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 26/57] scsi: scsi_transport_srp: Dont block target in failfast state Greg Kroah-Hartman
2021-02-05 14:06 ` Greg Kroah-Hartman [this message]
2021-02-05 14:06 ` [PATCH 5.10 28/57] scsi: fnic: Fix memleak in vnic_dev_init_devcmd2 Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 29/57] ASoC: SOF: Intel: hda: Resume codec to do jack detection Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 30/57] ALSA: hda: Add AlderLake-P PCI ID and HDMI codec vid Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 31/57] objtool: Dont add empty symbols to the rbtree Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 32/57] mac80211: fix incorrect strlen of .write in debugfs Greg Kroah-Hartman
2021-02-05 14:06 ` [PATCH 5.10 33/57] mac80211: fix fast-rx encryption check Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 34/57] mac80211: fix encryption key selection for 802.3 xmit Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 35/57] scsi: ibmvfc: Set default timeout to avoid crash during migration Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 36/57] ALSA: hda: Add Cometlake-R PCI ID Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 37/57] i2c: tegra: Create i2c_writesl_vi() to use with VI I2C for filling TX FIFO Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 38/57] udf: fix the problem that the disc content is not displayed Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 39/57] nvme: check the PRINFO bit before deciding the host buffer length Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 40/57] nvme-rdma: avoid request double completion for concurrent nvme_rdma_timeout Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 41/57] nvme-tcp: avoid request double completion for concurrent nvme_tcp_timeout Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 42/57] nvme-pci: allow use of cmb on v1.4 controllers Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 43/57] nvmet: set right status on error in id-ns handler Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 44/57] platform/x86: thinkpad_acpi: Add P53/73 firmware to fan_quirk_table for dual fan control Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 45/57] selftests/powerpc: Only test lwm/stmw on big endian Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 46/57] drm/amd/display: Update dram_clock_change_latency for DCN2.1 Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 47/57] drm/amd/display: Allow PSTATE chnage when no displays are enabled Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 48/57] drm/amd/display: Change function decide_dp_link_settings to avoid infinite looping Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 49/57] drm/amd/display: Use hardware sequencer functions for PG control Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 50/57] drm/amd/display: Fixed corruptions on HPDRX link loss restore Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 51/57] habanalabs: zero pci counters packet before submit to FW Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 52/57] habanalabs: fix backward compatibility of idle check Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 53/57] habanalabs: disable FW events on device removal Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 54/57] objtool: Dont fail the kernel build on fatal errors Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 55/57] x86/cpu: Add another Alder Lake CPU to the Intel family Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 56/57] kthread: Extract KTHREAD_IS_PER_CPU Greg Kroah-Hartman
2021-02-05 14:07 ` [PATCH 5.10 57/57] workqueue: Restrict affinity change to rescuer Greg Kroah-Hartman
2021-02-05 23:11 ` [PATCH 5.10 00/57] 5.10.14-rc1 review Pavel Machek
2021-02-08 12:39 ` Greg Kroah-Hartman
2021-02-06 14:16 ` Naresh Kamboju
2021-02-06 16:02 ` Guenter Roeck
2021-02-08 12:39 ` Greg Kroah-Hartman
2021-02-06 18:22 ` Jean-Denis Girard
2021-02-06 18:22 ` Jean-Denis Girard
2021-02-07 13:26 ` Jon Hunter
2021-02-08 12:39 ` Greg Kroah-Hartman
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