Messages in this thread | | | From | Huacai Chen <> | Date | Tue, 14 Feb 2023 22:51:44 +0800 | Subject | Re: "kernel ade access" oops on LoongArch |
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Hi, Ruoyao,
It seems to have something related to Youling's relative exception patchset.
Huacai
On Tue, Feb 14, 2023 at 4:46 PM Xi Ruoyao <xry111@xry111.site> wrote: > > This is a "help wanted" message :(. > > I've recently run into some strange kernel oops testing Glibc for LoongArch. A log looks like: > > [11569.195043] Kernel ade access[#1]: > [11569.198441] CPU: 1 PID: 1132296 Comm: ld-linux-loonga Not tainted 6.2.0-rc8+ #61 > [11569.205792] Hardware name: Loongson Loongson-3A5000-HV-7A2000-1w-V0.1-EVB/Loongson-LS3A5000-7A2000-1w-EVB-V1.21, BIOS Loongson-UDK2018-V4.0.05383-beta10 1 > [11569.219536] $ 0 : 0000000000000000 90000000005e3448 90000001113a0000 90000001113a3ab0 > [11569.227505] $ 4 : 90000001113a3af8 1000000000cf16d0 5555555555555850 000000000000000c > [11569.235475] $ 8 : 90000000009caa10 0000000000000000 00000000000002ca 000000000000008b > [11569.243438] $12 : 0000000000000001 9000000000cf1258 ffffffffffffffff 00007ffffb93c000 > [11569.251402] $16 : 0000000000000000 0000000000000140 0000000000000000 0000000000000020 > [11569.259366] $20 : 90000001113a3ec8 9000000000a97ee0 00007ffffb93bfa0 1555555555555613 > [11569.267334] $24 : 1000000000cf16d0 000000000000000c 9000000000cf1258 90000000009caa10 > [11569.275303] $28 : 90000001113a3af8 0aaaaaaaaaaaab0a 00007ffffb93bde0 90000001113a3ec0 > [11569.283268] era : 90000000009caa10 cmp_ex_search+0x0/0x28 > [11569.288814] ra : 90000000005e3448 bsearch+0x58/0xa8 > [11569.293921] CSR crmd: 000000b0 > [11569.293923] CSR prmd: 00000004 > [11569.297037] CSR euen: 00000000 > [11569.300152] CSR ecfg: 00071c1c > [11569.303266] CSR estat: 00480000 > [11569.309587] ExcCode : 8 (SubCode 1) > [11569.313049] BadVA : 1000000000cf16d0 > [11569.316596] PrId : 0014c011 (Loongson-64bit) > [11569.320923] Modules linked in: amdgpu nls_cp936 vfat fat input_leds drm_ttm_helper ttm video gpu_sched drm_buddy snd_hda_codec_generic drm_display_helper ledtrig_audio drm_kms_helper led_class snd_hda_intel sha256_generic snd_intel_dspcfg cfbfillrect libsha256 snd_hda_codec syscopyarea snd_hda_core hid_generic cfbimgblt cfg80211 snd_pcm sysfillrect usbhid sysimgblt snd_timer cfbcopyarea hid snd igb soundcore efivarfs > [11569.357709] Process ld-linux-loonga (pid: 1132296, threadinfo=000000003cbd0caa, task=000000005bcd27a6) > [11569.366977] Stack : 00007ffffb93bd60 0000000000000000 9000000180a36a40 0000000000000001 > [11569.374940] 90000001113a3bb0 00007ffffb93c000 9000000000224c94 90000000009cab2c > [11569.382899] 0000000000000001 9000000000224c94 00007ffff3258000 900000000025a1b4 > [11569.390866] 90000001113a3bb0 900000000022f4cc 00007ffffb93c000 900000000022f74c > [11569.398834] 9000000180a36a40 0000000000000001 0000000000000000 00007ffffb93c000 > [11569.406800] 90000001113a3bb0 900000000022f8f8 90000001113a3ec0 00007ffffb93bde0 > [11569.414768] 00007ffffb93bd60 0000000000000000 0000000000000000 00007fffff7c4600 > [11569.422734] 9000000182ebab70 9000000000d08000 0000000046505501 900000000022ee6c > [11569.430698] 0000000000000000 9000000000224b84 90000001113a0000 90000001113a3cf0 > [11569.438661] 0000000000000000 00007ffffb93c0d0 0000000000000000 0000000000000040 > [11569.446627] ... > [11569.449058] Call Trace: > [11569.449062] [<90000000009caa10>] cmp_ex_search+0x0/0x28 > [11569.456681] [<90000000005e3448>] bsearch+0x58/0xa8 > [11569.461443] [<90000000009cab2c>] search_extable+0x28/0x34 > [11569.466807] [<900000000025a1b4>] search_exception_tables+0x48/0x7c > [11569.472953] [<900000000022f4cc>] fixup_exception+0x18/0xcc > [11569.478410] [<900000000022f74c>] do_sigsegv+0x174/0x1b0 > [11569.483605] [<900000000022f8f8>] do_page_fault+0x170/0x344 > [11569.489058] [<900000000022ee6c>] tlb_do_page_fault_1+0x128/0x1c4 > [11569.495029] [<9000000000224b84>] handle_signal+0x634/0x884 > [11569.500487] [<9000000000225704>] arch_do_signal_or_restart+0xb4/0xe0 > [11569.506808] [<90000000002b5b30>] exit_to_user_mode_prepare+0xbc/0x100 > [11569.513214] [<9000000000a02628>] syscall_exit_to_user_mode+0x30/0x4c > [11569.519533] [<90000000002214a4>] handle_syscall+0xc4/0x160 > > [11569.526472] Code: 4c000020 02800404 4c000020 <240000ac> 26000084 0010b0a5 680014a4 00129484 00111004 > > [11569.537704] ---[ end trace 0000000000000000 ]--- > > "BadVA : 1000000000cf16d0" may suggest the highest bit of an address is > somehow cleared. > > The issue is not deterministic, but it seems easily reproduced by: > > 1. Compile Glibc: > > ../glibc/configure --prefix=/usr \ > --disable-werror \ > --enable-kernel=5.19 \ > --enable-stack-protector=strong \ > --with-headers=/usr/include \ > libc_cv_slibdir=/usr/lib > make -j4 > > 2. Check Glibc: > > make check -j4 > > 3. If the oops did not happen during the last step, run a specific test > in a dead loop: > > while true; do make test t=malloc/tst-mallocfork3-malloc-check; done > > Then an oops would likely show up in several minutes. > > Though the oops is nondeterministic, I'm almost sure it's not a hardware > stability issue because I'm getting exactly same stack traces for each > oops message. I cannot easily rule out the possibility about "the > compiler miscompiles kernel code" though. > > I'm running 6.2-rc8 with the following patches from loongarch-next: > > ACPI: Define ACPI_MACHINE_WIDTH to 64 for LoongArch > PCI: loongson: Improve the MRRS quirk for LS7A > PCI: Add quirk for LS7A to avoid reboot failure > irqchip/loongson-liointc: Save/restore int_edge/int_pol registers during S3/S4 > LoongArch: Add vector extensions support > tools: Add LoongArch build infrastructure > libbpf: Add LoongArch support to bpf_tracing.h > selftests/seccomp: Add LoongArch selftesting support > SH: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK > LoongArch: Add CPU HWMon platform driver > > Any idea to fix the issue or suggestion to debug it further? > > -- > Xi Ruoyao <xry111@xry111.site> > School of Aerospace Science and Technology, Xidian University
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