From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Immad Mir <mirimmad17@gmail.com>,
Dave Kleikamp <dave.kleikamp@oracle.com>,
Sasha Levin <sashal@kernel.org>,
shaggy@kernel.org, jfs-discussion@lists.sourceforge.net
Subject: [PATCH AUTOSEL 5.15 23/23] FS: JFS: Check for read-only mounted filesystem in txBegin
Date: Sun, 23 Jul 2023 21:23:34 -0400 [thread overview]
Message-ID: <20230724012334.2317140-23-sashal@kernel.org> (raw)
In-Reply-To: <20230724012334.2317140-1-sashal@kernel.org>
From: Immad Mir <mirimmad17@gmail.com>
[ Upstream commit 95e2b352c03b0a86c5717ba1d24ea20969abcacc ]
This patch adds a check for read-only mounted filesystem
in txBegin before starting a transaction potentially saving
from NULL pointer deref.
Signed-off-by: Immad Mir <mirimmad17@gmail.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/jfs/jfs_txnmgr.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index 042bbe6d8ac2e..6c8680d3907af 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -354,6 +354,11 @@ tid_t txBegin(struct super_block *sb, int flag)
jfs_info("txBegin: flag = 0x%x", flag);
log = JFS_SBI(sb)->log;
+ if (!log) {
+ jfs_error(sb, "read-only filesystem\n");
+ return 0;
+ }
+
TXN_LOCK();
INCREMENT(TxStat.txBegin);
--
2.39.2
prev parent reply other threads:[~2023-07-24 1:28 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-24 1:23 [PATCH AUTOSEL 5.15 01/23] drm/radeon: Fix integer overflow in radeon_cs_parser_init Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 02/23] ALSA: emu10k1: roll up loops in DSP setup code for Audigy Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 03/23] PCI: tegra194: Fix possible array out of bounds access Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 04/23] ASoC: amd: vangogh: Add check for acp config flags in vangogh platform Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 05/23] ARM: dts: imx6dl: prtrvt, prtvt7, prti6q, prtwd2: fix USB related warnings Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 06/23] iopoll: Call cpu_relax() in busy loops Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 07/23] quota: Properly disable quotas when add_dquot_ref() fails Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 08/23] quota: fix warning in dqgrab() Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 09/23] ALSA: hda: Add Loongson LS7A HD-Audio support Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 10/23] ASoC: SOF: Intel: fix SoundWire/HDaudio mutual exclusion Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 11/23] dma-remap: use kvmalloc_array/kvfree for larger dma memory remap Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 12/23] HID: logitech-hidpp: Add USB and Bluetooth IDs for the Logitech G915 TKL Keyboard Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 13/23] drm/amdgpu: install stub fence into potential unused fence pointers Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 14/23] HID: add quirk for 03f0:464a HP Elite Presenter Mouse Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 15/23] RDMA/mlx5: Return the firmware result upon destroying QP/RQ Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 16/23] ASoC: SOF: core: Free the firmware trace before calling snd_sof_shutdown() Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 17/23] ovl: check type and offset of struct vfsmount in ovl_entry Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 18/23] udf: Fix uninitialized array access for some pathnames Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 19/23] ALSA: hda/realtek: Add quirks for ROG ALLY CS35l41 audio Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 20/23] fs: jfs: Fix UBSAN: array-index-out-of-bounds in dbAllocDmapLev Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 21/23] MIPS: dec: prom: Address -Warray-bounds warning Sasha Levin
2023-07-24 1:23 ` [PATCH AUTOSEL 5.15 22/23] FS: JFS: Fix null-ptr-deref Read in txBegin Sasha Levin
2023-07-24 1:23 ` Sasha Levin [this message]
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