https://bugzilla.kernel.org/show_bug.cgi?id=42829 --- Comment #6 from Steve <stefan.bosak@xxxxxxxxx> 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 <namhyung@xxxxxxxxx> 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 <namhyung@xxxxxxxxx> Cc: stable@xxxxxxxxxx Signed-off-by: NeilBrown <neilb@xxxxxxx> :040000 040000 e3d19f53113f5bb5faef422958607e4f0131d235 eab9913143e1c027df693bf1fa57475da77bd36e M drivers How could I help now ? Thank you for your time. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
