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 4.9 16/21] ext4: prohibit fstrim in norecovery mode
Date: Fri, 29 Mar 2019 21:31:07 -0400 [thread overview]
Message-ID: <20190330013112.784-16-sashal@kernel.org> (raw)
In-Reply-To: <20190330013112.784-1-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 2880e017cd0a..2ce73287b53c 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -749,6 +749,13 @@ 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
next prev parent reply other threads:[~2019-03-30 1:35 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-30 1:30 [PATCH AUTOSEL 4.9 01/21] gpio: pxa: handle corner case of unprobed device Sasha Levin
2019-03-30 1:30 ` [PATCH AUTOSEL 4.9 02/21] rsi: improve kernel thread handling to fix kernel panic Sasha Levin
2019-03-30 1:30 ` [PATCH AUTOSEL 4.9 03/21] 9p: do not trust pdu content for stat item size Sasha Levin
2019-03-30 1:30 ` [PATCH AUTOSEL 4.9 04/21] 9p locks: add mount option for lock retry interval Sasha Levin
2019-03-30 1:30 ` [PATCH AUTOSEL 4.9 05/21] f2fs: fix to do sanity check with current segment number Sasha Levin
2019-03-30 1:30 ` [PATCH AUTOSEL 4.9 06/21] serial: uartps: console_setup() can't be placed to init section Sasha Levin
2019-03-30 1:30 ` [PATCH AUTOSEL 4.9 07/21] HID: i2c-hid: override HID descriptors for certain devices Sasha Levin
2019-03-30 1:30 ` [PATCH AUTOSEL 4.9 08/21] ARM: samsung: Limit SAMSUNG_PM_CHECK config option to non-Exynos platforms Sasha Levin
2019-03-30 1:31 ` [PATCH AUTOSEL 4.9 09/21] ACPI / SBS: Fix GPE storm on recent MacBookPro's Sasha Levin
2019-03-30 1:31 ` [PATCH AUTOSEL 4.9 10/21] cifs: fallback to older infolevels on findfirst queryinfo retry Sasha Levin
2019-03-30 1:31 ` [PATCH AUTOSEL 4.9 11/21] kernel: hung_task.c: disable on suspend Sasha Levin
2019-03-30 1:31 ` [PATCH AUTOSEL 4.9 12/21] crypto: sha256/arm - fix crash bug in Thumb2 build Sasha Levin
2019-03-30 1:31 ` [PATCH AUTOSEL 4.9 13/21] crypto: sha512/arm " Sasha Levin
[not found] ` <20190330013112.784-1-sashal-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2019-03-30 1:31 ` [PATCH AUTOSEL 4.9 14/21] iommu/dmar: Fix buffer overflow during PCI bus notification Sasha Levin
2019-03-30 1:31 ` Sasha Levin
2019-03-30 1:31 ` [PATCH AUTOSEL 4.9 15/21] soc/tegra: pmc: Drop locking from tegra_powergate_is_powered() Sasha Levin
2019-03-30 1:31 ` Sasha Levin [this message]
2019-03-30 1:31 ` [PATCH AUTOSEL 4.9 17/21] lkdtm: Add tests for NULL pointer dereference Sasha Levin
2019-03-30 1:31 ` [PATCH AUTOSEL 4.9 18/21] ARM: 8839/1: kprobe: make patch_lock a raw_spinlock_t Sasha Levin
2019-03-30 1:31 ` [PATCH AUTOSEL 4.9 19/21] appletalk: Fix use-after-free in atalk_proc_exit Sasha Levin
2019-03-30 1:31 ` [PATCH AUTOSEL 4.9 20/21] lib/div64.c: off by one in shift Sasha Levin
2019-03-30 1:31 ` [PATCH AUTOSEL 4.9 21/21] include/linux/swap.h: use offsetof() instead of custom __swapoffset macro Sasha Levin
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