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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Alexey Dobriyan <adobriyan@gmail.com>,
	Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
	Sasha Levin <sashal@kernel.org>,
	linux-block@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 03/22] null_blk: fix spurious IO errors after failed past-wp access
Date: Thu,  9 Apr 2020 23:50:25 -0400	[thread overview]
Message-ID: <20200410035044.9698-3-sashal@kernel.org> (raw)
In-Reply-To: <20200410035044.9698-1-sashal@kernel.org>

From: Alexey Dobriyan <adobriyan@gmail.com>

[ Upstream commit ff77042296d0a54535ddf74412c5ae92cb4ec76a ]

Steps to reproduce:

	BLKRESETZONE zone 0

	// force EIO
	pwrite(fd, buf, 4096, 4096);

	[issue more IO including zone ioctls]

It will start failing randomly including IO to unrelated zones because of
->error "reuse". Trigger can be partition detection as well if test is not
run immediately which is even more entertaining.

The fix is of course to clear ->error where necessary.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alexey Dobriyan (SK hynix) <adobriyan@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/block/null_blk.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index b4078901dbcb9..b12e373aa956a 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -622,6 +622,7 @@ static struct nullb_cmd *__alloc_cmd(struct nullb_queue *nq)
 	if (tag != -1U) {
 		cmd = &nq->cmds[tag];
 		cmd->tag = tag;
+		cmd->error = BLK_STS_OK;
 		cmd->nq = nq;
 		if (nq->dev->irqmode == NULL_IRQ_TIMER) {
 			hrtimer_init(&cmd->timer, CLOCK_MONOTONIC,
@@ -1399,6 +1400,7 @@ static blk_status_t null_queue_rq(struct blk_mq_hw_ctx *hctx,
 		cmd->timer.function = null_cmd_timer_expired;
 	}
 	cmd->rq = bd->rq;
+	cmd->error = BLK_STS_OK;
 	cmd->nq = nq;
 
 	blk_mq_start_request(bd->rq);
-- 
2.20.1


  parent reply	other threads:[~2020-04-10  3:50 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-10  3:50 [PATCH AUTOSEL 4.14 01/22] null_blk: Fix the null_add_dev() error path Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 02/22] null_blk: Handle null_add_dev() failures properly Sasha Levin
2020-04-10  3:50 ` Sasha Levin [this message]
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 04/22] x86: Don't let pgprot_modify() change the page encryption bit Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 05/22] block: keep bdi->io_pages in sync with max_sectors_kb for stacked devices Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 06/22] irqchip/versatile-fpga: Handle chained IRQs properly Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 07/22] sched: Avoid scale real weight down to zero Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 08/22] selftests/x86/ptrace_syscall_32: Fix no-vDSO segfault Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 09/22] PCI/switchtec: Fix init_completion race condition with poll_wait() Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 10/22] libata: Remove extra scsi_host_put() in ata_scsi_add_hosts() Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 11/22] gfs2: Don't demote a glock until its revokes are written Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 12/22] x86/boot: Use unsigned comparison for addresses Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 13/22] efi/x86: Ignore the memory attributes table on i386 Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 14/22] genirq/irqdomain: Check pointer in irq_domain_alloc_irqs_hierarchy() Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 15/22] block: Fix use-after-free issue accessing struct io_cq Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 16/22] usb: dwc3: core: add support for disabling SS instances in park mode Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 17/22] irqchip/gic-v4: Provide irq_retrigger to avoid circular locking dependency Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 18/22] locking/lockdep: Avoid recursion in lockdep_count_{for,back}ward_deps() Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 19/22] block, bfq: fix use-after-free in bfq_idle_slice_timer_body Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 20/22] btrfs: hold a ref on the root in btrfs_recover_relocation Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 21/22] btrfs: remove a BUG_ON() from merge_reloc_roots() Sasha Levin
2020-04-10  3:50 ` [PATCH AUTOSEL 4.14 22/22] btrfs: track reloc roots based on their commit root bytenr Sasha Levin

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