From: Borislav Petkov <bp@alien8.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
alex@ghiti.fr, aou@eecs.berkeley.edu,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Qian Cai <cai@lca.pw>, Catalin Marinas <catalin.marinas@arm.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
dave.jiang@intel.com, David Miller <davem@davemloft.net>,
Dmitry Vyukov <dvyukov@google.com>,
Alexander Potapenko <glider@google.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Peter Anvin <hpa@zytor.com>, James Morse <james.morse@arm.com>,
James Hogan <jhogan@kernel.org>,
Kan Liang <kan.liang@linux.intel.com>,
Linux-MM <linux-mm@kvack.org>,
Russell King - ARM Linux <linux@armlinux.org.uk>,
Andrew Lutomirski <luto@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
mawilcox@microsoft.com, Ingo Molnar <mingo@elte.hu>,
mm-commits@vger.kernel.org, Michael Ellerman <mpe@ellerman.id.au>,
n-horiguchi@ah.jp.nec.com, Palmer Dabbelt <palmer@sifive.com>,
Paul Burton <paul.burton@mips.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Paul Mackerras <paulus@samba.org>,
Peter Zijlstra <peterz@infradead.org>,
ralf@linux-mips.org, shashim@codeaurora.org,
Steven Price <steven.price@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
vgupta@synopsys.com, Will Deacon <will@kernel.org>,
zong.li@sifive.com
Subject: Re: [patch 064/158] mm: add generic ptdump
Date: Sun, 1 Dec 2019 16:21:19 +0100 [thread overview]
Message-ID: <20191201152119.GD6629@zn.tnic> (raw)
In-Reply-To: <20191201151010.GC6629@zn.tnic>
On Sun, Dec 01, 2019 at 04:10:11PM +0100, Borislav Petkov wrote:
> So lemme first confirm it really is caused by those patches.
Yeah, those patches are causing it. Tried your current master - it is OK
- and then applied Andrew's patches I was CCed on, ontop, and I got in a
VM:
VFS: Mounted root (ext4 filesystem) readonly on device 8:2.
devtmpfs: mounted
Freeing unused kernel image (initmem) memory: 664K
Write protecting kernel text and read-only data: 18164k
NX-protecting the kernel data: 7416k
BUG: kernel NULL pointer dereference, address: 00000014
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
*pdpt = 0000000000000000 *pde = f000ff53f000ff53
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.4.0+ #3
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.1-1 04/01/2014
EIP: __lock_acquire.isra.0+0x2e8/0x4e0
Code: e8 bd a1 2f 00 85 c0 74 11 8b 1d 08 8f 26 c5 85 db 0f 84 05 1a 00 00 8d 76 00 31 db 8d 65 f4 89 d8 5b 5e 5f 5d c3 8d 74 26 00 <8b> 44 90 04 85 c0 0f 85 4c fd ff ff e9 33 fd ff ff 8d b4 26 00 00
EAX: 00000010 EBX: 00000010 ECX: 00000001 EDX: 00000000
ESI: f1070040 EDI: f1070040 EBP: f1073e04 ESP: f1073de0
DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010097
CR0: 80050033 CR2: 00000014 CR3: 05348000 CR4: 001406b0
Call Trace:
lock_acquire+0x42/0x60
? __walk_page_range+0x4d9/0x590
_raw_spin_lock+0x22/0x40
? __walk_page_range+0x4d9/0x590
__walk_page_range+0x4d9/0x590
walk_page_range_novma+0x57/0xa0
ptdump_walk_pgd+0x38/0x70
ptdump_walk_pgd_level_core+0x66/0x90
? ptdump_walk_pgd_level_core+0x90/0x90
ptdump_walk_pgd_level_checkwx+0x16/0x19
mark_rodata_ro+0x95/0x9a
? rest_init+0xfb/0xfb
kernel_init+0x25/0xe5
ret_from_fork+0x2e/0x38
Modules linked in:
CR2: 0000000000000014
---[ end trace 8b67ede738f0029a ]---
EIP: __lock_acquire.isra.0+0x2e8/0x4e0
Code: e8 bd a1 2f 00 85 c0 74 11 8b 1d 08 8f 26 c5 85 db 0f 84 05 1a 00 00 8d 76 00 31 db 8d 65 f4 89 d8 5b 5e 5f 5d c3 8d 74 26 00 <8b> 44 90 04 85 c0 0f 85 4c fd ff ff e9 33 fd ff ff 8d b4 26 00 00
EAX: 00000010 EBX: 00000010 ECX: 00000001 EDX: 00000000
ESI: f1070040 EDI: f1070040 EBP: f1073e04 ESP: f1073de0
DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010097
CR0: 80050033 CR2: 00000014 CR3: 05348000 CR4: 001406b0
note: swapper/0[1] exited with preempt_count 1
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
Kernel Offset: disabled
---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 ]---
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2019-12-01 15:21 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-01 1:53 [patch 064/158] mm: add generic ptdump akpm
2019-12-01 9:07 ` Borislav Petkov
2019-12-01 14:45 ` Linus Torvalds
2019-12-01 15:10 ` Borislav Petkov
2019-12-01 15:21 ` Borislav Petkov [this message]
2019-12-01 15:45 ` Borislav Petkov
2019-12-02 9:09 ` Steven Price
2019-12-02 15:42 ` Borislav Petkov
2019-12-03 10:47 ` David Hildenbrand
2019-12-03 11:00 ` David Hildenbrand
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