Hi Christoph,
I tried with latest for-5.12/block branch, and got below issue when
trying to create raid1 array.
[ 80.605832] BUG: kernel NULL pointer dereference, address:
0000000000000018
[ 80.606159] #PF: supervisor read access in kernel mode
[ 80.606159] #PF: error_code(0x0000) - not-present page
[ 80.606159] PGD 0 P4D 0
[ 80.606159] Oops: 0000 [#1] SMP NOPTI
[ 80.606159] CPU: 1 PID: 207 Comm: mdadm Not tainted 5.11.0-rc5+ #37
[ 80.606159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.10.2-1ubuntu1 04/01/2014
[ 80.606159] RIP: 0010:bdev_read_only+0x0/0x30
[ 80.606159] Code: 89 df 5b 5d e9 71 21 e7 ff 81 e6 ff ff 0f 00 48 c7
c7 40 99 d9 9e e8 0f e5 04 00 eb a0 0f 1f 00 66 2e 0f 1f 84 00 00 00 00
00 <80> 7f 18 00 b8 01 00 00 00 75 11 48 8b 97 60 03 00 00 48 8b 4a 40
[ 80.606159] RSP: 0018:ffffb14f405dfd38 EFLAGS: 00000246
[ 80.606159] RAX: 0000000000000000 RBX: ffff9b0e0863b018 RCX:
ffff9b0e01edc000
[ 80.606159] RDX: ffff9b0e01b54c00 RSI: ffff9b0e0863b000 RDI:
0000000000000000
[ 80.606159] RBP: ffff9b0e01272200 R08: 0000000000000000 R09:
0000000000000000
[ 80.606159] R10: ffffee978004da40 R11: 0000000000000cc0 R12:
ffff9b0e0863b000
[ 80.606159] R13: ffff9b0e01f2cc00 R14: ffff9b0e0863b000 R15:
0000000000000000
[ 80.606159] FS: 00007f522ec65740(0000) GS:ffff9b0e7bc80000(0000)
knlGS:0000000000000000
[ 80.606159] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 80.606159] CR2: 0000000000000018 CR3: 0000000001364000 CR4:
00000000000006e0
[ 80.606159] Call Trace:
[ 80.606159] bind_rdev_to_array+0x2f7/0x380
[ 80.606159] ? cred_has_capability+0x80/0x120
[ 80.606159] md_add_new_disk+0x204/0x630
[ 80.606159] ? security_capable+0x33/0x50
[ 80.606159] md_ioctl+0xee7/0x1690
[ 80.606159] ? selinux_file_ioctl+0x143/0x200
[ 80.606159] blkdev_ioctl+0x1ff/0x240
[ 80.606159] block_ioctl+0x34/0x40
[ 80.606159] __x64_sys_ioctl+0x89/0xc0
[ 80.606159] do_syscall_64+0x33/0x40
[ 80.606159] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 80.606159] RIP: 0033:0x7f522e564317
[ 80.606159] Code: b3 66 90 48 8b 05 71 4b 2d 00 64 c7 00 26 00 00 00
48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f
05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 41 4b 2d 00 f7 d8 64 89 01 48
[ 80.606159] RSP: 002b:00007ffc3abd96f8 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[ 80.606159] RAX: ffffffffffffffda RBX: 00005653ee690350 RCX:
00007f522e564317
[ 80.606159] RDX: 00005653ee694058 RSI: 0000000040140921 RDI:
0000000000000004
[ 80.606159] RBP: 00005653ee690410 R08: 00007f522e839db0 R09:
0000000000000000
[ 80.606159] R10: 00005653ee690010 R11: 0000000000000246 R12:
0000000000000000
[ 80.606159] R13: 0000000000000000 R14: 0000000000000000 R15:
00005653ee694010
[ 80.606159] Modules linked in:
[ 80.606159] CR2: 0000000000000018
[ 80.622996] ---[ end trace 22144b856a3c1001 ]---
[ 80.623285] RIP: 0010:bdev_read_only+0x0/0x30
[ 80.623501] Code: 89 df 5b 5d e9 71 21 e7 ff 81 e6 ff ff 0f 00 48 c7
c7 40 99 d9 9e e8 0f e5 04 00 eb a0 0f 1f 00 66 2e 0f 1f 84 00 00 00 00
00 <80> 7f 18 00 b8 01 00 00 00 75 11 48 8b 97 60 03 00 00 48 8b 4a 40
[ 80.624544] RSP: 0018:ffffb14f405dfd38 EFLAGS: 00000246
[ 80.624788] RAX: 0000000000000000 RBX: ffff9b0e0863b018 RCX:
ffff9b0e01edc000
[ 80.625136] RDX: ffff9b0e01b54c00 RSI: ffff9b0e0863b000 RDI:
0000000000000000
[ 80.625449] RBP: ffff9b0e01272200 R08: 0000000000000000 R09:
0000000000000000
[ 80.625761] R10: ffffee978004da40 R11: 0000000000000cc0 R12:
ffff9b0e0863b000
[ 80.626112] R13: ffff9b0e01f2cc00 R14: ffff9b0e0863b000 R15:
0000000000000000
[ 80.626429] FS: 00007f522ec65740(0000) GS:ffff9b0e7bc80000(0000)
knlGS:0000000000000000
[ 80.626784] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 80.627035] CR2: 0000000000000018 CR3: 0000000001364000 CR4:
00000000000006e0
Killed
Thanks,
Guoqing
