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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>,
	Theodore Ts'o <tytso@mit.edu>, Sasha Levin <sashal@kernel.org>,
	linux-ext4@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 25/37] ext4: prohibit fstrim in norecovery mode
Date: Fri, 29 Mar 2019 21:30:08 -0400	[thread overview]
Message-ID: <20190330013020.379-25-sashal@kernel.org> (raw)
In-Reply-To: <20190330013020.379-1-sashal@kernel.org>

From: "Darrick J. Wong" <darrick.wong@oracle.com>

[ Upstream commit 18915b5873f07e5030e6fb108a050fa7c71c59fb ]

The ext4 fstrim implementation uses the block bitmaps to find free space
that can be discarded.  If we haven't replayed the journal, the bitmaps
will be stale and we absolutely *cannot* use stale metadata to zap the
underlying storage.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/ext4/ioctl.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 7917cc89ab21..3dbf4e414706 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -940,6 +940,13 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		if (!blk_queue_discard(q))
 			return -EOPNOTSUPP;
 
+		/*
+		 * We haven't replayed the journal, so we cannot use our
+		 * block-bitmap-guided storage zapping commands.
+		 */
+		if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
+			return -EROFS;
+
 		if (copy_from_user(&range, (struct fstrim_range __user *)arg,
 		    sizeof(range)))
 			return -EFAULT;
-- 
2.19.1


  parent reply	other threads:[~2019-03-30  1:36 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-30  1:29 [PATCH AUTOSEL 4.14 01/37] gpio: pxa: handle corner case of unprobed device Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 02/37] rsi: improve kernel thread handling to fix kernel panic Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 03/37] 9p: do not trust pdu content for stat item size Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 04/37] 9p locks: add mount option for lock retry interval Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 05/37] f2fs: fix to do sanity check with current segment number Sasha Levin
2019-03-30  1:29   ` Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 06/37] netfilter: xt_cgroup: shrink size of v2 path Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 07/37] serial: uartps: console_setup() can't be placed to init section Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 08/37] powerpc/pseries: Remove prrn_work workqueue Sasha Levin
2019-03-30  1:29   ` Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 09/37] media: au0828: cannot kfree dev before usb disconnect Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 10/37] HID: i2c-hid: override HID descriptors for certain devices Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 11/37] ARM: samsung: Limit SAMSUNG_PM_CHECK config option to non-Exynos platforms Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 12/37] usbip: fix vhci_hcd controller counting Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 13/37] ACPI / SBS: Fix GPE storm on recent MacBookPro's Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 14/37] KVM: nVMX: restore host state in nested_vmx_vmexit for VMFail Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 15/37] compiler.h: update definition of unreachable() Sasha Levin
2019-03-30  1:29 ` [PATCH AUTOSEL 4.14 16/37] cifs: fallback to older infolevels on findfirst queryinfo retry Sasha Levin
2019-03-30  1:30 ` [PATCH AUTOSEL 4.14 17/37] kernel: hung_task.c: disable on suspend Sasha Levin
2019-03-30  1:30 ` [PATCH AUTOSEL 4.14 18/37] nvme-pci: fix conflicting p2p resource adds Sasha Levin
2019-03-30  1:30   ` Sasha Levin
2019-04-01 17:37   ` Heitke, Kenneth
2019-04-01 17:37     ` Heitke, Kenneth
2019-04-03 12:57     ` Sasha Levin
2019-04-03 12:57       ` Sasha Levin
2019-03-30  1:30 ` [PATCH AUTOSEL 4.14 19/37] blk-mq: protect debugfs_create_files() from failures Sasha Levin
2019-03-30  1:30 ` [PATCH AUTOSEL 4.14 20/37] crypto: sha256/arm - fix crash bug in Thumb2 build Sasha Levin
2019-03-30  1:30 ` [PATCH AUTOSEL 4.14 21/37] crypto: sha512/arm " Sasha Levin
2019-03-30  1:30 ` [PATCH AUTOSEL 4.14 22/37] iommu/dmar: Fix buffer overflow during PCI bus notification Sasha Levin
2019-03-30  1:30 ` [PATCH AUTOSEL 4.14 23/37] kvm: properly check debugfs dentry before using it Sasha Levin
2019-03-30  1:30 ` [PATCH AUTOSEL 4.14 24/37] soc/tegra: pmc: Drop locking from tegra_powergate_is_powered() Sasha Levin
2019-03-30  1:30 ` Sasha Levin [this message]
2019-03-30  1:30 ` [PATCH AUTOSEL 4.14 26/37] lkdtm: Print real addresses Sasha Levin
2019-03-30  1:30 ` [PATCH AUTOSEL 4.14 27/37] lkdtm: Add tests for NULL pointer dereference Sasha Levin

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