From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>,
Jens Axboe <axboe@kernel.dk>, Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.6 24/43] null_blk: return error for invalid zone size
Date: Fri, 5 Jun 2020 16:14:54 +0200 [thread overview]
Message-ID: <20200605140153.790067538@linuxfoundation.org> (raw)
In-Reply-To: <20200605140152.493743366@linuxfoundation.org>
From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
[ Upstream commit e274832590211c4b1b1e807ca66fad8b5bb8b328 ]
In null_init_zone_dev() check if the zone size is larger than device
capacity, return error if needed.
This also fixes the following oops :-
null_blk: changed the number of conventional zones to 4294967295
BUG: kernel NULL pointer dereference, address: 0000000000000010
PGD 7d76c5067 P4D 7d76c5067 PUD 7d240c067 PMD 0
Oops: 0002 [#1] SMP NOPTI
CPU: 4 PID: 5508 Comm: nullbtests.sh Tainted: G OE 5.7.0-rc4lblk-fnext0
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e4
RIP: 0010:null_init_zoned_dev+0x17a/0x27f [null_blk]
RSP: 0018:ffffc90007007e00 EFLAGS: 00010246
RAX: 0000000000000020 RBX: ffff8887fb3f3c00 RCX: 0000000000000007
RDX: 0000000000000000 RSI: ffff8887ca09d688 RDI: ffff888810fea510
RBP: 0000000000000010 R08: ffff8887ca09d688 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8887c26e8000
R13: ffffffffa05e9390 R14: 0000000000000000 R15: 0000000000000001
FS: 00007fcb5256f740(0000) GS:ffff888810e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000010 CR3: 000000081e8fe000 CR4: 00000000003406e0
Call Trace:
null_add_dev+0x534/0x71b [null_blk]
nullb_device_power_store.cold.41+0x8/0x2e [null_blk]
configfs_write_file+0xe6/0x150
vfs_write+0xba/0x1e0
ksys_write+0x5f/0xe0
do_syscall_64+0x60/0x250
entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x7fcb51c71840
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/block/null_blk_zoned.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/block/null_blk_zoned.c b/drivers/block/null_blk_zoned.c
index ed34785dd64b..5dc955f5ea0a 100644
--- a/drivers/block/null_blk_zoned.c
+++ b/drivers/block/null_blk_zoned.c
@@ -20,6 +20,10 @@ int null_zone_init(struct nullb_device *dev)
pr_err("zone_size must be power-of-two\n");
return -EINVAL;
}
+ if (dev->zone_size > dev->size) {
+ pr_err("Zone size larger than device capacity\n");
+ return -EINVAL;
+ }
dev->zone_size_sects = dev->zone_size << ZONE_SIZE_SHIFT;
dev->nr_zones = dev_size >>
--
2.25.1
next prev parent reply other threads:[~2020-06-05 14:25 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-05 14:14 [PATCH 5.6 00/43] 5.6.17-rc1 review Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 01/43] x86/syscalls: Revert "x86/syscalls: Make __X32_SYSCALL_BIT be unsigned long" Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 02/43] Revert "cgroup: Add memory barriers to plug cgroup_rstat_updated() race window" Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 03/43] ARC: Fix ICCM & DCCM runtime size checks Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 04/43] ARC: [plat-eznps]: Restrict to CONFIG_ISA_ARCOMPACT Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 05/43] efi/libstub: Avoid returning uninitialized data from setup_graphics() Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 06/43] evm: Fix RCU list related warnings Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 07/43] scsi: pm: Balance pm_only counter of request queue during system resume Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 08/43] efi/earlycon: Fix early printk for wider fonts Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 09/43] x86/hyperv: Properly suspend/resume reenlightenment notifications Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 10/43] dmaengine: ti: k3-udma: Fix TR mode flags for slave_sg and memcpy Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 11/43] i2c: altera: Fix race between xfer_msg and isr thread Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 12/43] io_uring: initialize ctx->sqo_wait earlier Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 13/43] io_uring: dont prepare DRAIN reqs twice Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 14/43] io_uring: fix FORCE_ASYNC req preparation Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 15/43] net: phy: propagate an error back to the callers of phy_sfp_probe Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 16/43] x86/mmiotrace: Use cpumask_available() for cpumask_var_t variables Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 17/43] net: bmac: Fix read of MAC address from ROM Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 18/43] drm/edid: Add Oculus Rift S to non-desktop list Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 19/43] s390/mm: fix set_huge_pte_at() for empty ptes Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 20/43] io_uring: reset -EBUSY error when io sq thread is waken up Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 21/43] drm/amd/display: DP training to set properly SCRAMBLING_DISABLE Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 22/43] riscv: Fix print_vm_layout build error if NOMMU Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 23/43] wireguard: selftests: use newer iproute2 for gcc-10 Greg Kroah-Hartman
2020-06-05 14:14 ` Greg Kroah-Hartman [this message]
2020-06-05 14:14 ` [PATCH 5.6 25/43] net: ethernet: ti: fix some return value check of cpsw_ale_create() Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 26/43] net/ethernet/freescale: rework quiesce/activate for ucc_geth Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 27/43] net: ethernet: stmmac: Enable interface clocks on probe for IPQ806x Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 28/43] selftests: mlxsw: qos_mc_aware: Specify arping timeout as an integer Greg Kroah-Hartman
2020-06-05 14:14 ` [PATCH 5.6 29/43] net: Fix return value about devm_platform_ioremap_resource() Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 30/43] net: smsc911x: Fix runtime PM imbalance on error Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 31/43] mm: Fix mremap not considering huge pmd devmap Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 32/43] HID: sony: Fix for broken buttons on DS3 USB dongles Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 33/43] HID: multitouch: enable multi-input as a quirk for some devices Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 34/43] HID: i2c-hid: add Schneider SCL142ALM to descriptor override Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 35/43] p54usb: add AirVasT USB stick device-id Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 36/43] mt76: mt76x02u: Add support for newer versions of the XBox One wifi adapter Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 37/43] crypto: api - Fix use-after-free and race in crypto_spawn_alg Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 38/43] kernel/relay.c: handle alloc_percpu returning NULL in relay_open Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 39/43] mmc: fix compilation of user API Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 40/43] media: Revert "staging: imgu: Address a compiler warning on alignment" Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 41/43] media: staging: ipu3-imgu: Move alignment attribute to field Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 42/43] net: dsa: mt7530: set CPU port to fallback mode Greg Kroah-Hartman
2020-06-05 14:15 ` [PATCH 5.6 43/43] airo: Fix read overflows sending packets Greg Kroah-Hartman
2020-06-05 15:30 ` [PATCH 5.6 00/43] 5.6.17-rc1 review Shuah Khan
2020-06-05 15:48 ` Greg Kroah-Hartman
2020-06-05 22:13 ` Shuah Khan
2020-06-06 6:27 ` Jon Hunter
2020-06-06 13:34 ` Guenter Roeck
2020-06-06 16:12 ` Naresh Kamboju
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