From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Coly Li <colyli@suse.de>, Jens Axboe <axboe@kernel.dk>,
Sasha Levin <sashal@kernel.org>,
linux-bcache@vger.kernel.org
Subject: [PATCH AUTOSEL 3.18 25/41] bcache: fix input overflow to sequential_cutoff
Date: Wed, 27 Mar 2019 14:25:02 -0400 [thread overview]
Message-ID: <20190327182518.19394-25-sashal@kernel.org> (raw)
In-Reply-To: <20190327182518.19394-1-sashal@kernel.org>
From: Coly Li <colyli@suse.de>
[ Upstream commit 8c27a3953e92eb0b22dbb03d599f543a05f9574e ]
People may set sequential_cutoff of a cached device via sysfs file,
but current code does not check input value overflow. E.g. if value
4294967295 (UINT_MAX) is written to file sequential_cutoff, its value
is 4GB, but if 4294967296 (UINT_MAX + 1) is written into, its value
will be 0. This is an unexpected behavior.
This patch replaces d_strtoi_h() by sysfs_strtoul_clamp() to convert
input string to unsigned integer value, and limit its range in
[0, UINT_MAX]. Then the input overflow can be fixed.
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/md/bcache/sysfs.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index 87daccbbc61b..463ce6757338 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -215,7 +215,9 @@ STORE(__cached_dev)
d_strtoul(writeback_rate_d_term);
d_strtoul_nonzero(writeback_rate_p_term_inverse);
- d_strtoi_h(sequential_cutoff);
+ sysfs_strtoul_clamp(sequential_cutoff,
+ dc->sequential_cutoff,
+ 0, UINT_MAX);
d_strtoi_h(readahead);
if (attr == &sysfs_clear_stats)
--
2.19.1
next prev parent reply other threads:[~2019-03-27 18:30 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-27 18:24 [PATCH AUTOSEL 3.18 01/41] i2c: sis630: correct format strings Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 02/41] tracing: kdb: Fix ftdump to not sleep Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 03/41] sysctl: handle overflow for file-max Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 04/41] mm/cma.c: cma_declare_contiguous: correct err handling Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 05/41] mm/vmalloc.c: fix kernel BUG at mm/vmalloc.c:512! Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 06/41] mm/slab.c: kmemleak no scan alien caches Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 07/41] ocfs2: fix a panic problem caused by o2cb_ctl Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 08/41] cifs: use correct format characters Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 09/41] dm thin: add sanity checks to thin-pool and external snapshot creation Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 10/41] cifs: Fix NULL pointer dereference of devname Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 11/41] fs: fix guard_bio_eod to check for real EOD errors Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 12/41] tools lib traceevent: Fix buffer overflow in arg_eval Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 13/41] scsi: core: replace GFP_ATOMIC with GFP_KERNEL in scsi_scan.c Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 14/41] ARM: 8840/1: use a raw_spinlock_t in unwind Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 15/41] mmc: omap: fix the maximum timeout setting Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 16/41] e1000e: Fix -Wformat-truncation warnings Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 17/41] IB/mlx4: Increase the timeout for CM cache Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 18/41] scsi: megaraid_sas: return error when create DMA pool failed Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 19/41] SoC: imx-sgtl5000: add missing put_device() Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 20/41] leds: lp55xx: fix null deref on firmware load failure Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 21/41] kprobes: Prohibit probing on bsearch() Sasha Levin
2019-03-27 18:24 ` [PATCH AUTOSEL 3.18 22/41] ARM: 8833/1: Ensure that NEON code always compiles with Clang Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 23/41] ALSA: PCM: check if ops are defined before suspending PCM Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 24/41] bcache: fix input overflow to cache set sysfs file io_error_halflife Sasha Levin
2019-03-27 18:25 ` Sasha Levin [this message]
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 26/41] bcache: improve sysfs_strtoul_clamp() Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 27/41] fbdev: fbmem: fix memory access if logo is bigger than the screen Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 28/41] cdrom: Fix race condition in cdrom_sysctl_register Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 29/41] e1000e: fix cyclic resets at link up with active tx Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 30/41] locking/lockdep: Add debug_locks check in __lock_downgrade() Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 31/41] tty: increase the default flip buffer limit to 2*640K Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 32/41] media: mt9m111: set initial frame size other than 0x0 Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 33/41] hwrng: virtio - Avoid repeated init of completion Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 34/41] Bluetooth: Verify that l2cap_get_conf_opt provides large enough buffer Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 35/41] hpet: Fix missing '=' character in the __setup() code of hpet_mmap_enable Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 36/41] dmaengine: imx-dma: fix warning comparison of distinct pointer types Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 37/41] media: s5p-jpeg: Check for fmt_ver_flag when doing fmt enumeration Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 38/41] wlcore: Fix memory leak in case wl12xx_fetch_firmware failure Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 39/41] x86/build: Mark per-CPU symbols as absolute explicitly for LLD Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 40/41] dmaengine: tegra: avoid overflow of byte tracking Sasha Levin
2019-03-27 18:25 ` [PATCH AUTOSEL 3.18 41/41] drm/dp/mst: Configure no_stop_bit correctly for remote i2c xfers Sasha Levin
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