From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Qian Cai <cai@lca.pw>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
Sasha Levin <sashal@kernel.org>,
megaraidlinux.pdl@broadcom.com, linux-scsi@vger.kernel.org
Subject: [PATCH AUTOSEL 4.4 25/28] scsi: megaraid: fix out-of-bound array accesses
Date: Tue, 8 Jan 2019 14:34:42 -0500 [thread overview]
Message-ID: <20190108193445.124251-25-sashal@kernel.org> (raw)
In-Reply-To: <20190108193445.124251-1-sashal@kernel.org>
From: Qian Cai <cai@lca.pw>
[ Upstream commit c7a082e4242fd8cd21a441071e622f87c16bdacc ]
UBSAN reported those with MegaRAID SAS-3 3108,
[ 77.467308] UBSAN: Undefined behaviour in drivers/scsi/megaraid/megaraid_sas_fp.c:117:32
[ 77.475402] index 255 is out of range for type 'MR_LD_SPAN_MAP [1]'
[ 77.481677] CPU: 16 PID: 333 Comm: kworker/16:1 Not tainted 4.20.0-rc5+ #1
[ 77.488556] Hardware name: Huawei TaiShan 2280 /BC11SPCD, BIOS 1.50 06/01/2018
[ 77.495791] Workqueue: events work_for_cpu_fn
[ 77.500154] Call trace:
[ 77.502610] dump_backtrace+0x0/0x2c8
[ 77.506279] show_stack+0x24/0x30
[ 77.509604] dump_stack+0x118/0x19c
[ 77.513098] ubsan_epilogue+0x14/0x60
[ 77.516765] __ubsan_handle_out_of_bounds+0xfc/0x13c
[ 77.521767] mr_update_load_balance_params+0x150/0x158 [megaraid_sas]
[ 77.528230] MR_ValidateMapInfo+0x2cc/0x10d0 [megaraid_sas]
[ 77.533825] megasas_get_map_info+0x244/0x2f0 [megaraid_sas]
[ 77.539505] megasas_init_adapter_fusion+0x9b0/0xf48 [megaraid_sas]
[ 77.545794] megasas_init_fw+0x1ab4/0x3518 [megaraid_sas]
[ 77.551212] megasas_probe_one+0x2c4/0xbe0 [megaraid_sas]
[ 77.556614] local_pci_probe+0x7c/0xf0
[ 77.560365] work_for_cpu_fn+0x34/0x50
[ 77.564118] process_one_work+0x61c/0xf08
[ 77.568129] worker_thread+0x534/0xa70
[ 77.571882] kthread+0x1c8/0x1d0
[ 77.575114] ret_from_fork+0x10/0x1c
[ 89.240332] UBSAN: Undefined behaviour in drivers/scsi/megaraid/megaraid_sas_fp.c:117:32
[ 89.248426] index 255 is out of range for type 'MR_LD_SPAN_MAP [1]'
[ 89.254700] CPU: 16 PID: 95 Comm: kworker/u130:0 Not tainted 4.20.0-rc5+ #1
[ 89.261665] Hardware name: Huawei TaiShan 2280 /BC11SPCD, BIOS 1.50 06/01/2018
[ 89.268903] Workqueue: events_unbound async_run_entry_fn
[ 89.274222] Call trace:
[ 89.276680] dump_backtrace+0x0/0x2c8
[ 89.280348] show_stack+0x24/0x30
[ 89.283671] dump_stack+0x118/0x19c
[ 89.287167] ubsan_epilogue+0x14/0x60
[ 89.290835] __ubsan_handle_out_of_bounds+0xfc/0x13c
[ 89.295828] MR_LdRaidGet+0x50/0x58 [megaraid_sas]
[ 89.300638] megasas_build_io_fusion+0xbb8/0xd90 [megaraid_sas]
[ 89.306576] megasas_build_and_issue_cmd_fusion+0x138/0x460 [megaraid_sas]
[ 89.313468] megasas_queue_command+0x398/0x3d0 [megaraid_sas]
[ 89.319222] scsi_dispatch_cmd+0x1dc/0x8a8
[ 89.323321] scsi_request_fn+0x8e8/0xdd0
[ 89.327249] __blk_run_queue+0xc4/0x158
[ 89.331090] blk_execute_rq_nowait+0xf4/0x158
[ 89.335449] blk_execute_rq+0xdc/0x158
[ 89.339202] __scsi_execute+0x130/0x258
[ 89.343041] scsi_probe_and_add_lun+0x2fc/0x1488
[ 89.347661] __scsi_scan_target+0x1cc/0x8c8
[ 89.351848] scsi_scan_channel.part.3+0x8c/0xc0
[ 89.356382] scsi_scan_host_selected+0x130/0x1f0
[ 89.361002] do_scsi_scan_host+0xd8/0xf0
[ 89.364927] do_scan_async+0x9c/0x320
[ 89.368594] async_run_entry_fn+0x138/0x420
[ 89.372780] process_one_work+0x61c/0xf08
[ 89.376793] worker_thread+0x13c/0xa70
[ 89.380546] kthread+0x1c8/0x1d0
[ 89.383778] ret_from_fork+0x10/0x1c
This is because when populating Driver Map using firmware raid map, all
non-existing VDs set their ldTgtIdToLd to 0xff, so it can be skipped later.
From drivers/scsi/megaraid/megaraid_sas_base.c ,
memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
From drivers/scsi/megaraid/megaraid_sas_fp.c ,
/* For non existing VDs, iterate to next VD*/
if (ld >= (MAX_LOGICAL_DRIVES_EXT - 1))
continue;
However, there are a few places that failed to skip those non-existing VDs
due to off-by-one errors. Then, those 0xff leaked into MR_LdRaidGet(0xff,
map) and triggered the out-of-bound accesses.
Fixes: 51087a8617fe ("megaraid_sas : Extended VD support")
Signed-off-by: Qian Cai <cai@lca.pw>
Acked-by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/megaraid/megaraid_sas_fp.c | 2 +-
drivers/scsi/megaraid/megaraid_sas_fusion.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/megaraid/megaraid_sas_fp.c b/drivers/scsi/megaraid/megaraid_sas_fp.c
index 741509b35617..14f32c114c55 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fp.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fp.c
@@ -1273,7 +1273,7 @@ void mr_update_load_balance_params(struct MR_DRV_RAID_MAP_ALL *drv_map,
for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT; ldCount++) {
ld = MR_TargetIdToLdGet(ldCount, drv_map);
- if (ld >= MAX_LOGICAL_DRIVES_EXT) {
+ if (ld >= MAX_LOGICAL_DRIVES_EXT - 1) {
lbInfo[ldCount].loadBalanceFlag = 0;
continue;
}
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 213944ed64d9..3d3bfa814093 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -1758,7 +1758,7 @@ static void megasas_build_ld_nonrw_fusion(struct megasas_instance *instance,
device_id < instance->fw_supported_vd_count)) {
ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
- if (ld >= instance->fw_supported_vd_count)
+ if (ld >= instance->fw_supported_vd_count - 1)
fp_possible = 0;
raid = MR_LdRaidGet(ld, local_map_ptr);
--
2.19.1
next prev parent reply other threads:[~2019-01-08 19:35 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-08 19:34 [PATCH AUTOSEL 4.4 01/28] platform/x86: asus-wmi: Tell the EC the OS will handle the display off hotkey Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 02/28] e1000e: allow non-monotonic SYSTIM readings Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 03/28] writeback: don't decrement wb->refcnt if !wb->bdi Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 04/28] MIPS: SiByte: Enable swiotlb for SWARM, LittleSur and BigSur Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 05/28] arm64: perf: set suppress_bind_attrs flag to true Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 06/28] USB: serial: ftdi_sio: use rounding when calculating baud rate divisors Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 07/28] drm/amdgpu: Correct get_crtc_scanoutpos behavior when vpos >= vtotal Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 08/28] jffs2: Fix use of uninitialized delayed_work, lockdep breakage Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 09/28] pstore/ram: Do not treat empty buffers as valid Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 10/28] powerpc/pseries/cpuidle: Fix preempt warning Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 11/28] media: firewire: Fix app_info parameter type in avc_ca{,_app}_info Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 12/28] net: call sk_dst_reset when set SO_DONTROUTE Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 13/28] scsi: target: use consistent left-aligned ASCII INQUIRY data Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 14/28] clk: imx6q: reset exclusive gates on init Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 15/28] kconfig: fix file name and line number of warn_ignored_character() Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 16/28] kconfig: fix memory leak when EOF is encountered in quotation Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 17/28] mmc: atmel-mci: do not assume idle after atmci_request_end Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 18/28] perf intel-pt: Fix error with config term "pt=0" Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 19/28] perf svghelper: Fix unchecked usage of strncpy() Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 20/28] perf parse-events: " Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 21/28] dm kcopyd: Fix bug causing workqueue stalls Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 22/28] dm snapshot: Fix excessive memory usage and " Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 23/28] ALSA: bebob: fix model-id of unit for Apogee Ensemble Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 24/28] sysfs: Disable lockdep for driver bind/unbind files Sasha Levin
2019-01-08 19:34 ` Sasha Levin [this message]
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 26/28] ocfs2: fix panic due to unrecovered local alloc Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 27/28] mm/page-writeback.c: don't break integrity writeback on ->writepage() error Sasha Levin
2019-01-08 19:34 ` [PATCH AUTOSEL 4.4 28/28] mm, proc: be more verbose about unstable VMA flags in /proc/<pid>/smaps Sasha Levin
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