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Date: Sat, 29 Jan 2022 15:10:43 +0800
From: kernel test robot <oliver.sang@...el.com>
To: "Jason A. Donenfeld" <Jason@...c4.com>
Cc: 0day robot <lkp@...el.com>,
Jonathan Neuschäfer <j.neuschaefer@....net>,
Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
"Jason A. Donenfeld" <Jason@...c4.com>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
Andy Lutomirski <luto@...capital.net>,
Theodore Ts'o <tytso@....edu>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
Waiman Long <longman@...hat.com>,
Boqun Feng <boqun.feng@...il.com>,
Andy Lutomirski <luto@...nel.org>, stable@...r.kernel.org
Subject: [random] 1e1724f9dd:
UBSAN:array-index-out-of-bounds_in_drivers/char/random.c
Greeting,
FYI, we noticed the following commit (built with clang-14):
commit: 1e1724f9ddd1649555105fd31a8973e7a2e5466c ("[PATCH] random: remove batched entropy locking")
url: https://github.com/0day-ci/linux/commits/Jason-A-Donenfeld/random-remove-batched-entropy-locking/20220128-233457
base: https://git.kernel.org/cgit/linux/kernel/git/gregkh/char-misc.git 710f8af199ee9d72dd87083edd55c5ee250ee6f4
patch link: https://lore.kernel.org/lkml/20220128153344.34211-1-Jason@zx2c4.com
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+----------------------------------------------------------+------------+------------+
| | 710f8af199 | 1e1724f9dd |
+----------------------------------------------------------+------------+------------+
| UBSAN:array-index-out-of-bounds_in_drivers/char/random.c | 0 | 13 |
| BUG:KASAN:global-out-of-bounds_in_get_random_u32 | 0 | 13 |
+----------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 29.921782][ T1] UBSAN: array-index-out-of-bounds in drivers/char/random.c:2141:8
[ 29.923207][ T1] index 8 is out of range for type 'u64[8]' (aka 'unsigned long long[8]')
[ 29.923634][ T1] CPU: 0 PID: 1 Comm: swapper Not tainted 5.17.0-rc1-00010-g1e1724f9ddd1 #2 51d507a9ab4d92cb438b1c02ba5a02d8ac52cd1d
[ 29.923634][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 29.923634][ T1] Call Trace:
[ 29.923634][ T1] <TASK>
[ 29.923634][ T1] dump_stack_lvl (??:?)
[ 29.923634][ T1] dump_stack (??:?)
[ 29.923634][ T1] __ubsan_handle_out_of_bounds (??:?)
[ 29.923634][ T1] get_random_u32 (??:?)
[ 29.923634][ T1] bucket_table_alloc (rhashtable.c:?)
[ 29.923634][ T1] rhashtable_init (??:?)
[ 29.923634][ T1] ? rcu_read_lock_sched_held (??:?)
[ 29.923634][ T1] ? bpf_iter_netlink (af_netlink.c:?)
[ 29.923634][ T1] netlink_proto_init (af_netlink.c:?)
[ 29.923634][ T1] do_one_initcall (??:?)
[ 29.923634][ T1] ? bpf_iter_netlink (af_netlink.c:?)
[ 29.923634][ T1] do_initcall_level (main.c:?)
[ 29.923634][ T1] do_initcalls (main.c:?)
[ 29.923634][ T1] do_basic_setup (main.c:?)
[ 29.923634][ T1] kernel_init_freeable (main.c:?)
[ 29.923634][ T1] ? rest_init (main.c:?)
[ 29.923634][ T1] kernel_init (main.c:?)
[ 29.923634][ T1] ? rest_init (main.c:?)
[ 29.923634][ T1] ret_from_fork (??:?)
[ 29.923634][ T1] </TASK>
[ 29.923634][ T1] ================================================================================
[ 29.923718][ T1] ==================================================================
[ 29.924895][ T1] BUG: KASAN: global-out-of-bounds in get_random_u32 (??:?)
[ 29.926024][ T1] Read of size 8 at addr ffffffffb4fe94c0 by task swapper/1
[ 29.926967][ T1]
[ 29.926967][ T1] CPU: 0 PID: 1 Comm: swapper Not tainted 5.17.0-rc1-00010-g1e1724f9ddd1 #2 51d507a9ab4d92cb438b1c02ba5a02d8ac52cd1d
[ 29.926967][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 29.926967][ T1] Call Trace:
[ 29.926967][ T1] <TASK>
[ 29.926967][ T1] dump_stack_lvl (??:?)
[ 29.926967][ T1] print_address_description (report.c:?)
[ 29.926967][ T1] __kasan_report (report.c:?)
[ 29.926967][ T1] ? get_random_u32 (??:?)
[ 29.926967][ T1] kasan_report (??:?)
[ 29.926967][ T1] __asan_report_load8_noabort (??:?)
[ 29.926967][ T1] get_random_u32 (??:?)
[ 29.926967][ T1] bucket_table_alloc (rhashtable.c:?)
[ 29.926967][ T1] rhashtable_init (??:?)
[ 29.926967][ T1] ? rcu_read_lock_sched_held (??:?)
[ 29.926967][ T1] ? bpf_iter_netlink (af_netlink.c:?)
[ 29.926967][ T1] netlink_proto_init (af_netlink.c:?)
[ 29.926967][ T1] do_one_initcall (??:?)
[ 29.926967][ T1] ? bpf_iter_netlink (af_netlink.c:?)
[ 29.926967][ T1] do_initcall_level (main.c:?)
[ 29.926967][ T1] do_initcalls (main.c:?)
[ 29.926967][ T1] do_basic_setup (main.c:?)
[ 29.926967][ T1] kernel_init_freeable (main.c:?)
[ 29.926967][ T1] ? rest_init (main.c:?)
[ 29.926967][ T1] kernel_init (main.c:?)
[ 29.926967][ T1] ? rest_init (main.c:?)
[ 29.926967][ T1] ret_from_fork (??:?)
[ 29.926967][ T1] </TASK>
[ 29.926967][ T1]
[ 29.926967][ T1] The buggy address belongs to the variable:
[ 29.926967][ T1] random_write_wakeup_bits+0x0/0x20
[ 29.926967][ T1]
[ 29.926967][ T1] Memory state around the buggy address:
[ 29.926967][ T1] ffffffffb4fe9380: 00 00 00 00 00 00 00 00 00 00 00 00 f9 f9 f9 f9
[ 29.926967][ T1] ffffffffb4fe9400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 29.926967][ T1] >ffffffffb4fe9480: 00 00 00 00 00 00 00 00 04 f9 f9 f9 00 00 00 00
[ 29.926967][ T1] ^
[ 29.926967][ T1] ffffffffb4fe9500: 00 00 00 00 00 00 f9 f9 f9 f9 f9 f9 01 f9 f9 f9
[ 29.926967][ T1] ffffffffb4fe9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 29.926967][ T1] ==================================================================
[ 29.926967][ T1] Disabling lock debugging due to kernel taint
[ 29.927133][ T1] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[ 29.930966][ T1] thermal_sys: Registered thermal governor 'fair_share'
[ 29.930971][ T1] thermal_sys: Registered thermal governor 'bang_bang'
[ 29.932004][ T1] thermal_sys: Registered thermal governor 'step_wise'
[ 29.933055][ T1] thermal_sys: Registered thermal governor 'user_space'
[ 29.933708][ T1] cpuidle: using governor ladder
[ 29.935795][ T1] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[ 29.937434][ T1] PCI: Using configuration type 1 for base access
[ 29.958988][ T1] kprobes: kprobe jump-optimization is enabled. All kprobes are optimized if possible.
[ 29.960327][ T7] Callback from call_rcu_tasks() invoked.
[ 29.961915][ T1] HugeTLB: can free 6 vmemmap pages for hugepages-2048kB
[ 29.962897][ T1] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[ 29.965886][ T1] cryptd: max_cpu_qlen set to 1000
[ 29.967924][ T1] raid6: skipped pq benchmark and selected sse2x4
[ 29.968825][ T1] raid6: using ssse3x2 recovery algorithm
[ 29.969891][ T1] ACPI: Added _OSI(Module Device)
[ 29.970307][ T1] ACPI: Added _OSI(Processor Device)
[ 29.971058][ T1] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 29.971841][ T1] ACPI: Added _OSI(Processor Aggregator Device)
[ 29.972747][ T1] ACPI: Added _OSI(Linux-Dell-Video)
[ 29.973549][ T1] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[ 29.973648][ T1] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
[ 29.994328][ T1] ACPI: 1 ACPI AML tables successfully acquired and loaded
[ 30.006626][ T1] ACPI: Interpreter enabled
[ 30.007071][ T1] ACPI: PM: (supports S0 S3 S5)
[ 30.007783][ T1] ACPI: Using IOAPIC for interrupt routing
[ 30.008714][ T1] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 30.011387][ T1] ACPI: Enabled 2 GPEs in block 00 to 0F
[ 30.053305][ T1] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[ 30.053667][ T1] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI HPX-Type3]
[ 30.054872][ T1] acpi PNP0A03:00: PCIe port services disabled; not requesting _OSC control
[ 30.056154][ T1] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[ 30.057970][ T1] acpiphp: Slot [3] registered
[ 30.058877][ T1] acpiphp: Slot [4] registered
[ 30.059769][ T1] acpiphp: Slot [5] registered
[ 30.060516][ T1] acpiphp: Slot [6] registered
[ 30.061393][ T1] acpiphp: Slot [7] registered
[ 30.062306][ T1] acpiphp: Slot [8] registered
[ 30.063187][ T1] acpiphp: Slot [9] registered
[ 30.063877][ T1] acpiphp: Slot [10] registered
[ 30.064814][ T1] acpiphp: Slot [11] registered
[ 30.065712][ T1] acpiphp: Slot [12] registered
[ 30.066613][ T1] acpiphp: Slot [13] registered
[ 30.067181][ T1] acpiphp: Slot [14] registered
[ 30.068082][ T1] acpiphp: Slot [15] registered
[ 30.068992][ T1] acpiphp: Slot [16] registered
[ 30.069889][ T1] acpiphp: Slot [17] registered
[ 30.070506][ T1] acpiphp: Slot [18] registered
[ 30.071401][ T1] acpiphp: Slot [19] registered
[ 30.072314][ T1] acpiphp: Slot [20] registered
[ 30.073206][ T1] acpiphp: Slot [21] registered
[ 30.073840][ T1] acpiphp: Slot [22] registered
[ 30.074765][ T1] acpiphp: Slot [23] registered
[ 30.075669][ T1] acpiphp: Slot [24] registered
[ 30.076557][ T1] acpiphp: Slot [25] registered
[ 30.077176][ T1] acpiphp: Slot [26] registered
[ 30.078073][ T1] acpiphp: Slot [27] registered
[ 30.078982][ T1] acpiphp: Slot [28] registered
To reproduce:
# build kernel
cd linux
cp config-5.17.0-rc1-00010-g1e1724f9ddd1 .config
make HOSTCC=clang-14 CC=clang-14 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=clang-14 CC=clang-14 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
cd <mod-install-dir>
find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
---
0DAY/LKP+ Test Infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation
Thanks,
Oliver Sang
View attachment "config-5.17.0-rc1-00010-g1e1724f9ddd1" of type "text/plain" (143971 bytes)
View attachment "job-script" of type "text/plain" (4822 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (13960 bytes)
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