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[71.184.117.43]) by smtp.gmail.com with ESMTPSA id p22sm4384866qte.2.2020.04.22.08.55.55 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 22 Apr 2020 08:55:56 -0700 (PDT) From: Qian Cai Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.80.23.2.2\)) Subject: AMD boot woe due to "x86/mm: Cleanup pgprot_4k_2_large() and pgprot_large_2_4k()" Message-Id: <1ED37D02-125F-4919-861A-371981581D9E@lca.pw> Date: Wed, 22 Apr 2020 11:55:54 -0400 Cc: Borislav Petkov , "Peter Zijlstra (Intel)" , x86 , LKML , kasan-dev To: Christoph Hellwig X-Mailer: Apple Mail (2.3608.80.23.2.2) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Reverted the linux-next commit and its dependency, a85573f7e741 ("x86/mm: Unexport __cachemode2pte_tbl=E2=80=9D) 9e294786c89a (=E2=80=9Cx86/mm: Cleanup pgprot_4k_2_large() and = pgprot_large_2_4k()=E2=80=9D) fixed crashes or hard reset on AMD machines during boot that have been = flagged by KASAN in different forms indicating some sort of memory corruption with = this config, https://raw.githubusercontent.com/cailca/linux-mm/master/x86.config [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x71] high level lint[0x1]) [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x78] high level lint[0x1]) [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x79] high level lint[0x1]) [ 0.000000] BUG: unable to handle page fault for address: = ffffed107c782fff [ 0.000000] #PF: supervisor read access in kernel mode [ 0.000000] #PF: error_code(0x0000) - not-present page [ 0.000000] = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D [ 0.000000] BUG: KASAN: stack-out-of-bounds in = cmp_ex_search+0x1e/0x40 ex_to_insn at lib/extable.c:20 (inlined by) cmp_ex_search at lib/extable.c:101 [ 0.000000] Read of size 4 at addr ffffffffae27cae4 by task = swapper/0[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted = 5.7.0-rc2-next-20200422+ #4 [ 0.000000] [ 0.000000] Hardware name: HPE ProLiant DL385 Gen10/ProLiant DL385 = Gen10, BIOS A40 03/09/2018 [ 0.000000] Call Trace: [ 0.000000]=20 [ 0.000000] The buggy address belongs to the variable: [ 0.000000] __start___ex_table+0x1cd4/0x2670 [ 0.000000]=20 [ 0.000000] Memory state around the buggy address: [ 0.000000] ffffffffae27c980: 00 00 00 00 00 00 00 00 00 00 00 00 00 = 00 00 00 [ 0.000000] ffffffffae27ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 = 00 00 00 [ 0.000000] >ffffffffae27ca80: 00 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 = 00 00 00 [ 0.000000] ^ [ 0.000000] ffffffffae27cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 = 00 00 00 [ 0.000000] ffffffffae27cb80: 00 00 00 00 00 f1 f1 f1 f1 02 f2 f2 f2 = f2 f2 f2 [ 0.000000] = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D [ 5.125583][ T0] BUG: KASAN: null-ptr-deref in = __check_object_size+0x12c/0x503 __read_once_size at include/linux/compiler.h:199 (inlined by) compound_head at include/linux/page-flags.h:182 (inlined by) PageSlab at include/linux/page-flags.h:333 (inlined by) check_heap_object at mm/usercopy.c:238 (inlined by) __check_object_size at mm/usercopy.c:286 (inlined by) __check_object_size at mm/usercopy.c:256 [ 5.133083][ T0] Read of size 8 at addr 0000000000000006 by task = swapper/0 [ 5.140244][ T0]=20 [ 5.142434][ T0] CPU: 0 PID: 0 Comm: swapper Not tainted = 5.7.0-rc2+ #8 [ 5.149241][ T0] Hardware name: HPE ProLiant DL385 Gen10/ProLiant = DL385 Gen10, BIOS A40 07/10/2019 [ 5.158502][ T0] Call Trace: [ 5.161654][ T0] ? do_raw_spin_lock+0x11e/0x1e0 [ 5.166542][ T0] ? rwlock_bug.part.0+0x60/0x60 [ 5.171348][ T0] ? bad_area_nosemaphore+0x16/0x20 [ 5.176409][ T0] ? do_page_fault+0x44b/0x9d7 [ 5.181043][ T0] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 5.186459][ T0] ? page_fault+0x34/0x40 [ 5.190649][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.195280][ T0] ? __asan_load8+0x40/0xb0 [ 5.199645][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.204274][ T0] ? vmalloc_fault+0x450/0x450 [ 5.208906][ T0] ? search_exception_tables+0x4c/0x50 [ 5.214231][ T0] ? fixup_exception+0x38/0x92 [ 5.218861][ T0] ? no_context.cold.21+0x160/0x2e0 [ 5.223928][ T0] ? pgtable_bad+0x80/0x80 [ 5.228209][ T0] ? register_lock_class+0xb40/0xb40 [ 5.233362][ T0] ? register_lock_class+0xb40/0xb40 [ 5.238519][ T0] ? snprintf+0xc0/0xc0 [ 5.242538][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 5.248039][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 5.253538][ T0] ? console_unlock+0x3e5/0x740 [ 5.258257][ T0] ? console_unlock+0x3ff/0x740 [ 5.262975][ T0] ? __bad_area_nosemaphore+0x66/0x230 [ 5.268303][ T0] ? do_raw_spin_lock+0x11e/0x1e0 [ 5.273193][ T0] ? rwlock_bug.part.0+0x60/0x60 [ 5.277998][ T0] ? bad_area_nosemaphore+0x16/0x20 [ 5.283064][ T0] ? do_page_fault+0x44b/0x9d7 [ 5.287694][ T0] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 5.293111][ T0] ? page_fault+0x34/0x40 [ 5.297303][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.301933][ T0] ? __asan_load8+0x40/0xb0 [ 5.306300][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.310929][ T0] ? vmalloc_fault+0x450/0x450 [ 5.315560][ T0] ? search_exception_tables+0x4c/0x50 [ 5.320886][ T0] ? fixup_exception+0x38/0x92 [ 5.325518][ T0] ? no_context.cold.21+0x160/0x2e0 [ 5.330582][ T0] ? pgtable_bad+0x80/0x80 [ 5.334863][ T0] ? register_lock_class+0xb40/0xb40 [ 5.340018][ T0] ? register_lock_class+0xb40/0xb40 [ 5.345171][ T0] ? snprintf+0xc0/0xc0 [ 5.349190][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 5.354694][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 5.360521][ T0] ? console_unlock+0x3e5/0x740 [ 5.365235][ T0] ? console_unlock+0x3ff/0x740 [ 5.369954][ T0] ? __bad_area_nosemaphore+0x66/0x230 [ 5.375282][ T0] ? do_raw_spin_lock+0x11e/0x1e0 [ 5.380174][ T0] ? rwlock_bug.part.0+0x60/0x60 [ 5.384977][ T0] ? bad_area_nosemaphore+0x16/0x20 [ 5.390044][ T0] ? do_page_fault+0x44b/0x9d7 [ 5.394674][ T0] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 5.400090][ T0] ? page_fault+0x34/0x40 [ 5.404282][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.408912][ T0] ? __asan_load8+0x40/0xb0 [ 5.413279][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.417908][ T0] ? vmalloc_fault+0x450/0x450 [ 5.422538][ T0] ? search_exception_tables+0x4c/0x50 [ 5.427868][ T0] ? fixup_exception+0x38/0x92 [ 5.432496][ T0] ? no_context.cold.21+0x160/0x2e0 [ 5.437562][ T0] ? pgtable_bad+0x80/0x80 [ 5.441843][ T0] ? register_lock_class+0xb40/0xb40 [ 5.446996][ T0] ? register_lock_class+0xb40/0xb40 [ 5.452152][ T0] ? snprintf+0xc0/0xc0 [ 5.456170][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 5.461674][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 5.467173][ T0] ? console_unlock+0x3e5/0x740 [ 5.471891][ T0] ? console_unlock+0x3ff/0x740 [ 5.476609][ T0] ? __bad_area_nosemaphore+0x66/0x230 [ 5.481937][ T0] ? do_raw_spin_lock+0x11e/0x1e0 [ 5.486829][ T0] ? rwlock_bug.part.0+0x60/0x60 [ 5.491632][ T0] ? bad_area_nosemaphore+0x16/0x20 [ 5.496699][ T0] ? do_page_fault+0x44b/0x9d7 [ 5.501329][ T0] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 5.506746][ T0] ? page_fault+0x34/0x40 [ 5.510938][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.515568][ T0] ? __asan_load8+0x40/0xb0 [ 5.519935][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.524564][ T0] ? vmalloc_fault+0x450/0x450 [ 5.529194][ T0] ? search_exception_tables+0x4c/0x50 [ 5.534521][ T0] ? fixup_exception+0x38/0x92 [ 5.539153][ T0] ? no_context.cold.21+0x160/0x2e0 [ 5.544218][ T0] ? pgtable_bad+0x80/0x80 [ 5.548499][ T0] ? register_lock_class+0xb40/0xb40 [ 5.553652][ T0] ? register_lock_class+0xb40/0xb40 [ 5.558805][ T0] ? snprintf+0xc0/0xc0 [ 5.562826][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 5.568327][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 5.573829][ T0] ? console_unlock+0x3e5/0x740 [ 5.578546][ T0] ? console_unlock+0x3ff/0x740 [ 5.583265][ T0] ? __bad_area_nosemaphore+0x66/0x230 [ 5.588592][ T0] ? do_raw_spin_lock+0x11e/0x1e0 [ 5.593485][ T0] ? rwlock_bug.part.0+0x60/0x60 [ 5.598290][ T0] ? bad_area_nosemaphore+0x16/0x20 [ 5.603354][ T0] ? do_page_fault+0x44b/0x9d7 [ 5.607985][ T0] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 5.613401][ T0] ? page_fault+0x34/0x40 [ 5.617594][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.622224][ T0] ? __asan_load8+0x40/0xb0 [ 5.626590][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.631219][ T0] ? vmalloc_fault+0x450/0x450 [ 5.635849][ T0] ? search_exception_tables+0x4c/0x50 [ 5.641176][ T0] ? fixup_exception+0x38/0x92 [ 5.645809][ T0] ? no_context.cold.21+0x160/0x2e0 [ 5.650874][ T0] ? pgtable_bad+0x80/0x80 [ 5.655154][ T0] ? register_lock_class+0xb40/0xb40 [ 5.660307][ T0] ? register_lock_class+0xb40/0xb40 [ 5.665461][ T0] ? snprintf+0xc0/0xc0 [ 5.669480][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 5.674983][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 5.680485][ T0] ? console_unlock+0x3e5/0x740 [ 5.685202][ T0] ? console_unlock+0x3ff/0x740 [ 5.689921][ T0] ? __bad_area_nosemaphore+0x66/0x230 [ 5.695248][ T0] ? do_raw_spin_lock+0x11e/0x1e0 [ 5.700141][ T0] ? rwlock_bug.part.0+0x60/0x60 [ 5.704945][ T0] ? bad_area_nosemaphore+0x16/0x20 [ 5.710010][ T0] ? do_page_fault+0x44b/0x9d7 [ 5.714639][ T0] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 5.720056][ T0] ? page_fault+0x34/0x40 [ 5.724249][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.728878][ T0] ? __asan_load8+0x40/0xb0 [ 5.733246][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.737875][ T0] ? vmalloc_fault+0x450/0x450 [ 5.742505][ T0] ? search_exception_tables+0x4c/0x50 [ 5.747832][ T0] ? fixup_exception+0x38/0x92 [ 5.752462][ T0] ? no_context.cold.21+0x160/0x2e0 [ 5.757529][ T0] ? pgtable_bad+0x80/0x80 [ 5.761809][ T0] ? register_lock_class+0xb40/0xb40 [ 5.766962][ T0] ? register_lock_class+0xb40/0xb40 [ 5.772118][ T0] ? snprintf+0xc0/0xc0 [ 5.776137][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 5.781639][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 5.787144][ T0] ? console_unlock+0x3e5/0x740 [ 5.791857][ T0] ? console_unlock+0x3ff/0x740 [ 5.796576][ T0] ? __bad_area_nosemaphore+0x66/0x230 [ 5.801903][ T0] ? do_raw_spin_lock+0x11e/0x1e0 [ 5.806796][ T0] ? rwlock_bug.part.0+0x60/0x60 [ 5.811601][ T0] ? bad_area_nosemaphore+0x16/0x20 [ 5.816665][ T0] ? do_page_fault+0x44b/0x9d7 [ 5.821295][ T0] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 5.826711][ T0] ? page_fault+0x34/0x40 [ 5.830904][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.835534][ T0] ? __asan_load8+0x40/0xb0 [ 5.839901][ T0] ? dump_pagetable+0xf3/0x3b0 [ 5.844530][ T0] ? vmalloc_fault+0x450/0x450 [ 5.849160][ T0] ? search_exception_tables+0x4c/0x50 [ 5.854487][ T0] ? fixup_exception+0x38/0x92 [ 5.859120][ T0] ? no_context.cold.21+0x160/0x2e0 [ 5.864185][ T0] ? pgtable_bad+0x80/0x80 [ 5.868465][ T0] ? register_lock_class+0xb40/0xb40 [ 5.873618][ T0] ? register_lock_class+0xb40/0xb40 [ 5.878773][ 6.262157][ T0] ? __asan_load8+0x40/0xb0 [ 6.266523][ T0] ? dump_pagetable+0xf3/0x3b0 [ 6.271152][ T0] ? vmalloc_fault+0x450/0x450 [ 6.275782][ T0] ? search_exception_tables+0x4c/0x50 [ 6.281109][ T0] ? fixup_exception+0x38/0x92 [ 6.285739][ T0] ? no_context.cold.21+0x160/0x2e0 [ 6.290807][ T0] ? pgtable_bad+0x80/0x80 [ 6.295087][ T0] ? register_lock_class+0xb40/0xb40 [ 6.300240][ T0] ? register_lock_class+0xb40/0xb40 [ 6.305394][ T0] ? snprintf+0xc0/0xc0 [ 6.309413][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 6.314917][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 6.320419][ T0] ? console_unlock+0x3e5/0x740 [ 6.325134][ T0] ? console_unlock+0x3ff/0x740 [ 6.329852][ T0] ? __bad_area_nosemaphore+0x66/0x230 [ 6.335180][ T0] ? do_raw_spin_lock+0x11e/0x1e0 [ 6.340072][ T0] ? rwlock_bug.part.0+0x60/0x60 [ 6.344877][ T0] ? bad_area_nosemaphore+0x16/0x20 [ 6.349944][ T0] ? do_page_fault+0x44b/0x9d7x11/0x60 [ 6.741538][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 6.747040][ T0] ? console_unlock+0x3e5/0x740 [ 6.751757][ T0] ? console_unlock+0x3ff/0x740 [ 6.756476][ T0] ? __bad_area_nosemaphore+0x66/0x230 [ 6.761803][ T0] ? do_raw_spin_lock+0x11e/0x1e0 [ 6.766694][ T0] ? rwlock_bug.part.0+0x60/0x60 [ 6.771500][ T0] ? bad_area_nosemaphore+0x16/0x20 [ 6.776565][ T0] ? do_page_fault+0x44b/0x9d7 [ 6.781196][ T0] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 6.786610][ T0] ? page_fault+0x34/0x40 [ 6.790805][ T0] ? dump_pagetable+0xf3/0x3b0 [ 6.795432][ T0] ? __asan_load8+0x40/0xb0 [ 6.799801][ T0] ? dump_pagetable+0xf3/0x3b0 [ 6.804430][ T0] ? vmalloc_fault+0x450/0x450 [ 6.809060][ T0] ? search_exception_tables+0x4c/0x50 [ 6.814387][ T0] ? fixup_exception+0x38/0x92 [ 6.819017][ T0] ? no_context.cold.21+0x160/0x2e0 [ 6.824084][ T0] ? pgtable_bad+0x80/0x80 [ 6.828363][ T0] ? register_lock_class+0xb40/0xb40 [ 6.833 T0] ? dump_pagetable+0xf3/0x3b0 [ 7.222054][ T0] ? __asan_load8+0x40/0xb0 [ 7.226423][ T0] ? dump_pagetable+0xf3/0x3b0 [ 7.231052][ T0] ? vmalloc_fault+0x450/0x450 [ 7.235682][ T0] ? search_exception_tables+0x4c/0x50 [ 7.241009][ T0] ? fixup_exception+0x38/0x92 [ 7.245640][ T0] ? no_context.cold.21+0x160/0x2e0 [ 7.250704][ T0] ? pgtable_bad+0x80/0x80 [ 7.254985][ T0] ? register_lock_class+0xb40/0xb40 [ 7.260140][ T0] ? register_lock_class+0xb40/0xb40 [ 7.265293][ T0] ? snprintf+0xc0/0xc0 [ 7.269312][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 7.274816][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 7.280317][ T0] ? console_unlock+0x3e5/0x740 [ 7.285035][ T0] ? console_unlock+0x3ff/0x740 [ 7.289751][ T0] ? __bad_area_nosemaphore+0x66/0x230 [ 7.295080][ T0] ? do_raw_spin_lock+0x11e/0x1e0 [ 7.299970][ T0] ? rwlock_bug.part.0+0x60pgtable_bad+0x80/0x80 [ 7.788263][ T0] ? register_lock_class+0xb40/0xb40 [ 7.793415][ T0] ? register_lock_class+0xb40/0xb40 [ 7.798571][ T0] ? snprintf+0xc0/0xc0 [ 7.802590][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 7.808094][ T0] ? debug_lockdep_rcu_enabled+0x11/0x60 [ 7.813595][ T0] ? console_unlock+0x3e5/0x740 [ 7.818312][ T0] ? console_unlock+0x3ff/0x740 [ 7.823030][ T0] ? __bad_area_nosemaphore+0x66/0x230 [ 7.828357][ T0] ? do_raw_spin_lock+0x11e/0x1e0 [ 7.833250][ T0] ? rwlock_bug.part.0+0x60/0x60 [ 7.838054][ T0] ? bad_area_nosemaphore+0x16/0x20 [ 7.843118][ T0] ? do_page_fault+0x44b/0x9d7 [ 7.847751][ T0] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 7.853165][ T0] ? page_fault+0x34/0x40 [ 7.857357][ T0] ? dump_pagetable+0xf3/0x3b0 [ 7.861987][ T0] ? __asan_load8+0x40/0xb0 [ 7.866356][ T0] ? dump_pagetable+0xf3/0x3b0 [ 7.870985][ T0] ? vmalloc_fault+0x450/0x450 [ 7.875613][ T0] ? search_exception_tables 8.264676][ T0] = ? bad_area_nosemaphore+0x16/0x20 [ 8.269740][ T0] ? do_page_fault+0x44b/0x9d7 [ 8.274372][ T0] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 8.279787][ T0] ? page_fault+0x34/0x40 [ 8.283980][ T0] ? dump_pagetable+0xf3/0x3b0 [ 8.288611][ T0] ? __asan_load8+0x40/0xb0 [ 8.292975][ T0] ? dump_pagetable+0xf3/0x3b0 [ 8.297607][ T0] ? vmalloc_fault+0x450/0x450 [ 8.302237][ T0] ? __kasan_check_write+0x14/0x20 [ 8.307220][ T0] ? debug_locks_off+0x44/0x70 [ 8.311845][ T0] ? no_context.cold.21+0x160/0x2e0 [ 8.316910][ T0] ? __kasan_check_read+0x11/0x20 [ 8.321802][ T0] ? pgtable_bad+0x80/0x80=