https://bugzilla.kernel.org/show_bug.cgi?id=42829
--- Comment #6 from Steve <stefan.bo...@gmail.com> 2012-03-02 01:05:35 ---
My results:
===========
git bisect log:
---------------
git bisect start
# good: [2c53b436a30867eb6b47dd7bab23ba638d1fb0d2] Linux 3.0-rc3
git bisect good 2c53b436a30867eb6b47dd7bab23ba638d1fb0d2
# bad: [b0af8dfdd67699e25083478c63eedef2e72ebd85] Linux 3.0-rc5
git bisect bad b0af8dfdd67699e25083478c63eedef2e72ebd85
# bad: [c01ad4081939f91ebd7277e8e731fd90ceb3e632] Merge branch 'for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
git bisect bad c01ad4081939f91ebd7277e8e731fd90ceb3e632
# bad: [f4ef084226f82ca923bf0a2658bb2876bd215ec1] Merge branch
'fbdev-fixes-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-3.x
git bisect bad f4ef084226f82ca923bf0a2658bb2876bd215ec1
# bad: [bd5dc17be87b3a3073d50b23802647db3ae3fa8e] uts: make default hostname
configurable, rather than always using "(none)"
git bisect bad bd5dc17be87b3a3073d50b23802647db3ae3fa8e
# bad: [f39e8409955fad210a9a7169cc53c4c18daaef3a] Merge branch 'drm-fixes' of
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
git bisect bad f39e8409955fad210a9a7169cc53c4c18daaef3a
# bad: [81eb3dd8438802138ac9ce12428632f35562c060] Merge branch 'for-linus' of
git://neil.brown.name/md
git bisect bad 81eb3dd8438802138ac9ce12428632f35562c060
# good: [9864c0053d3da4c5731ac8a6c4835179310bd40a] md: Using poll /proc/mdstat
can monitor the events of adding a spare disks
git bisect good 9864c0053d3da4c5731ac8a6c4835179310bd40a
# bad: [9b2dc8b665932a8e681a7ab3237f60475e75e161] md/raid5: fix
raid5_set_bi_hw_segments
git bisect bad 9b2dc8b665932a8e681a7ab3237f60475e75e161
# bad: [27d5ea04d08bea37bf651090e5f3c573d2390df8] md/bitmap: use proper
accessor macro
git bisect bad 27d5ea04d08bea37bf651090e5f3c573d2390df8
# bad: [01393f3d5836b7d62e925e6f4658a7eb22b83a11] md: check ->hot_remove_disk
when removing disk
git bisect bad 01393f3d5836b7d62e925e6f4658a7eb22b83a11
git bisect message:
-------------------
01393f3d5836b7d62e925e6f4658a7eb22b83a11 is the first bad commit
commit 01393f3d5836b7d62e925e6f4658a7eb22b83a11
Author: Namhyung Kim <namhy...@gmail.com>
Date: Thu Jun 9 11:42:54 2011 +1000
md: check ->hot_remove_disk when removing disk
Check pers->hot_remove_disk instead of pers->hot_add_disk in slot_store()
during disk removal. The linear personality only has ->hot_add_disk and
no ->hot_remove_disk, so that removing disk in the array resulted to
following kernel bug:
$ sudo mdadm --create /dev/md0 --level=linear --raid-devices=4
/dev/loop[0-3]
$ echo none | sudo tee /sys/block/md0/md/dev-loop2/slot
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [< (null)>] (null)
PGD c9f5d067 PUD 8575a067 PMD 0
Oops: 0010 [#1] SMP
CPU 2
Modules linked in: linear loop bridge stp llc kvm_intel kvm asus_atk0110
sr_mod cdrom sg
Pid: 10450, comm: tee Not tainted 3.0.0-rc1-leonard+ #173 System
manufacturer System Product Name/P5G41TD-M PRO
RIP: 0010:[<0000000000000000>] [< (null)>] (null)
RSP: 0018:ffff880085757df0 EFLAGS: 00010282
RAX: ffffffffa00168e0 RBX: ffff8800d1431800 RCX: 000000000000006e
RDX: 0000000000000001 RSI: 0000000000000002 RDI: ffff88008543c000
RBP: ffff880085757e48 R08: 0000000000000002 R09: 000000000000000a
R10: 0000000000000000 R11: ffff88008543c2e0 R12: 00000000ffffffff
R13: ffff8800b4641000 R14: 0000000000000005 R15: 0000000000000000
FS: 00007fe8c9e05700(0000) GS:ffff88011fa00000(0000)
knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 00000000b4502000 CR4: 00000000000406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process tee (pid: 10450, threadinfo ffff880085756000, task
ffff8800c9f08000)
Stack:
ffffffff8138496a ffff8800b4641000 ffff88008543c268 0000000000000000
ffff8800b4641000 ffff88008543c000 ffff8800d1431868 ffffffff81a78a90
ffff8800b4641000 ffff88008543c000 ffff8800d1431800 ffff880085757e98
Call Trace:
[<ffffffff8138496a>] ? slot_store+0xaa/0x265
[<ffffffff81384bae>] rdev_attr_store+0x89/0xa8
[<ffffffff8115a96a>] sysfs_write_file+0x108/0x144
[<ffffffff81106b87>] vfs_write+0xb1/0x10d
[<ffffffff8106e6c0>] ? trace_hardirqs_on_caller+0x111/0x135
[<ffffffff81106cac>] sys_write+0x4d/0x77
[<ffffffff814fe702>] system_call_fastpath+0x16/0x1b
Code: Bad RIP value.
RIP [< (null)>] (null)
RSP <ffff880085757df0>
CR2: 0000000000000000
---[ end trace ba5fc64319a826fb ]---
Signed-off-by: Namhyung Kim <namhy...@gmail.com>
Cc: sta...@kernel.org
Signed-off-by: NeilBrown <ne...@suse.de>
:040000 040000 e3d19f53113f5bb5faef422958607e4f0131d235
eab9913143e1c027df693bf1fa57475da77bd36e M drivers
How could I help now ?
Thank you for your time.
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