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Date: Mon, 16 Dec 2019 14:45:04 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: kvm list <kvm@...r.kernel.org>,
open list <linux-kernel@...r.kernel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
David Howells <dhowells@...hat.com>,
Al Viro <viro@...iv.linux.org.uk>,
linux-ext4 <linux-ext4@...r.kernel.org>,
Arnd Bergmann <arnd@...db.de>, lkft-triage@...ts.linaro.org,
Paolo Bonzini <pbonzini@...hat.com>, maz@...nel.org
Subject: mainline-5.5.0-rc1: do_mount_root+0x6c/0x10d - kernel crash while
mounting rootfs
The following kernel crash reported on qemu_x86_64 boot running
5.5.0-rc1 mainline kernel.
Regressions detected on arm64, arm, qemu_x86_64, and qemu_i386.
Where as x86_64 and i386 boot pass on devices.
qemu_x86_64 kernel crash log,
-------------------------------------------
[ 1.680229] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 1.681148] #PF: supervisor read access in kernel mode
[ 1.681150] #PF: error_code(0x0000) - not-present page
[ 1.681150] PGD 0 P4D 0
[ 1.681150] Oops: 0000 [#1] SMP NOPTI
[ 1.681150] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.5.0-rc1 #1
[ 1.681150] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 1.681150] RIP: 0010:strncpy+0x12/0x30
[ 1.681150] Code: 89 e5 48 83 c6 01 0f b6 4e ff 48 83 c2 01 84 c9
88 4a ff 75 ed 5d c3 90 55 48 85 d2 48 89 f8 48 89 e5 74 1e 48 01 fa
48 89 f9 <44> 0f b6 06 41 80 f8 01 44 88 01 48 83 de ff 48 83 c1 01 48
39 d1
[ 1.681150] RSP: 0018:ffffacea40013e00 EFLAGS: 00010286
[ 1.681150] RAX: ffff9eff78f4f000 RBX: ffffd91104e3d3c0 RCX: ffff9eff78f4f000
[ 1.681150] RDX: ffff9eff78f4ffff RSI: 0000000000000000 RDI: ffff9eff78f4f000
[ 1.681150] RBP: ffffacea40013e00 R08: ffff9eff78f4f000 R09: 0000000000000000
[ 1.681150] R10: ffffd91104e3d3c0 R11: 0000000000000000 R12: 0000000000008001
[ 1.681150] R13: 00000000fffffff4 R14: ffffffffa5d9aa89 R15: ffff9eff78f4e000
[ 1.681150] FS: 0000000000000000(0000) GS:ffff9eff7bc00000(0000)
knlGS:0000000000000000
[ 1.681150] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.681150] CR2: 0000000000000000 CR3: 0000000113010000 CR4: 00000000003406f0
[ 1.681150] Call Trace:
[ 1.681150] do_mount_root+0x6c/0x10d
[ 1.681150] mount_block_root+0x103/0x226
[ 1.681150] ? do_mknodat+0x16e/0x200
[ 1.681150] ? set_debug_rodata+0x17/0x17
[ 1.681150] mount_root+0x114/0x133
[ 1.681150] prepare_namespace+0x139/0x16a
[ 1.681150] kernel_init_freeable+0x21b/0x22f
[ 1.681150] ? rest_init+0x250/0x250
[ 1.681150] kernel_init+0xe/0x110
[ 1.681150] ret_from_fork+0x27/0x50
[ 1.681150] Modules linked in:
[ 1.681150] CR2: 0000000000000000
[ 1.681150] ---[ end trace d7ad8453a7546454 ]---
[ 1.681150] RIP: 0010:strncpy+0x12/0x30
[ 1.681150] Code: 89 e5 48 83 c6 01 0f b6 4e ff 48 83 c2 01 84 c9
88 4a ff 75 ed 5d c3 90 55 48 85 d2 48 89 f8 48 89 e5 74 1e 48 01 fa
48 89 f9 <44> 0f b6 06 41 80 f8 01 44 88 01 48 83 de ff 48 83 c1 01 48
39 d1
[ 1.681150] RSP: 0018:ffffacea40013e00 EFLAGS: 00010286
[ 1.681150] RAX: ffff9eff78f4f000 RBX: ffffd91104e3d3c0 RCX: ffff9eff78f4f000
[ 1.681150] RDX: ffff9eff78f4ffff RSI: 0000000000000000 RDI: ffff9eff78f4f000
[ 1.681150] RBP: ffffacea40013e00 R08: ffff9eff78f4f000 R09: 0000000000000000
[ 1.681150] R10: ffffd91104e3d3c0 R11: 0000000000000000 R12: 0000000000008001
[ 1.681150] R13: 00000000fffffff4 R14: ffffffffa5d9aa89 R15: ffff9eff78f4e000
[ 1.681150] FS: 0000000000000000(0000) GS:ffff9eff7bc00000(0000)
knlGS:0000000000000000
[ 1.681150] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.681150] CR2: 0000000000000000 CR3: 0000000113010000 CR4: 00000000003406f0
[ 1.681150] BUG: sleeping function called from invalid context at
/usr/src/kernel/include/linux/percpu-rwsem.h:38
[ 1.681150] in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid:
1, name: swapper/0
[ 1.681150] INFO: lockdep is turned off.
[ 1.681150] irq event stamp: 2360074
[ 1.681150] hardirqs last enabled at (2360073):
[<ffffffffa48f4c8c>] get_page_from_freelist+0x21c/0x1430
[ 1.681150] hardirqs last disabled at (2360074):
[<ffffffffa4601eab>] trace_hardirqs_off_thunk+0x1a/0x1c
[ 1.681150] softirqs last enabled at (2359990):
[<ffffffffa5800338>] __do_softirq+0x338/0x43a
[ 1.681150] softirqs last disabled at (2359975):
[<ffffffffa4701828>] irq_exit+0xb8/0xc0
[ 1.681150] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G D
5.5.0-rc1 #1
[ 1.681150] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 1.681150] Call Trace:
[ 1.681150] dump_stack+0x7a/0xa5
[ 1.681150] ___might_sleep+0x163/0x250
[ 1.681150] __might_sleep+0x4a/0x80
[ 1.681150] exit_signals+0x33/0x2d0
[ 1.681150] do_exit+0xb6/0xcd0
[ 1.681150] ? prepare_namespace+0x139/0x16a
[ 1.681150] ? kernel_init_freeable+0x21b/0x22f
[ 1.681150] ? rest_init+0x250/0x250
[ 1.681150] rewind_stack_do_exit+0x17/0x20
[ 1.736632] Kernel panic - not syncing: Attempted to kill init!
exitcode=0x00000009
[ 1.737579] Kernel Offset: 0x23600000 from 0xffffffff81000000
(relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Full log,
qemu_x86_64,
https://lkft.validation.linaro.org/scheduler/job/1054430#L573
qemu_i386:
https://lkft.validation.linaro.org/scheduler/job/1054335#L571
metadata:
git branch: master
git repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git commit: 9603e22104439ddfa6a077f1a0e5d8c662beec6c
git describe: v5.5-rc1-308-g9603e2210443
make_kernelversion: 5.5.0-rc1
kernel-config:
http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-corei7-64/lkft/linux-mainline/2325/config
build-url: https://ci.linaro.org/job/openembedded-lkft-linux-mainline/DISTRO=lkft,MACHINE=intel-corei7-64,label=docker-lkft/2325/
build-location:
http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-corei7-64/lkft/linux-mainline/2325
--
Linaro LKFT
https://lkft.linaro.org
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