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Bug#812415: marked as done (kernel Oops (NULL pointer dereference) while mounting drbd device )

Your message dated Sun, 09 May 2021 07:31:54 -0700 (PDT)
with message-id <6097f25a.1c69fb81.208c2.4c32@mx.google.com>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #812415,
regarding kernel Oops (NULL pointer dereference) while mounting drbd device 
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
812415: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=812415
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: linux-image-4.3.0-0.bpo.1-amd64
Version: 4.3.3-5~bpo8+1

Kernel:
# uname -a
Linux bac240a15n 4.3.0-0.bpo.1-amd64 #1 SMP Debian 4.3.3-5~bpo8+1 (2016-01-07) x86_64 GNU/Linux

Libc6
# dpkg -s libc6 | grep Version
Version: 2.19-18+deb8u1

I have seen this Oops a few times while mounting a drbd block device

/bin/mount -onoatime,barrier=0,nouser_xattr,noacl /dev/drbd1 /replicated

It is not easily reproducible though. I saw this on VMware ESX environment as well as in Citrix XEN.

+++++++++++++++++++++++++++++++++++++
Jan 20 15:31:40 bac1f6065n kernel: [ 244.728196] EXT4-fs (drbd1): Mount option "noacl" will be removed by 3.5
Jan 20 15:31:40 bac1f6065n kernel: [ 244.728196] Contact linux-ext4@vger.kernel.org if you think we should keep it.
Jan 20 15:31:40 bac1f6065n kernel: [ 244.728196]
Jan 20 15:31:40 bac1f6065n kernel: [ 244.728200] EXT4-fs (drbd1): mounting ext3 file system using the ext4 subsystem
Jan 20 15:31:40 bac1f6065n kernel: [ 244.766336] EXT4-fs (drbd1): barriers disabled
Jan 20 15:31:40 bac1f6065n kernel: [ 244.768365] BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
Jan 20 15:31:40 bac1f6065n kernel: [ 244.768585] IP: [<ffffffff811fc822>] __mark_inode_dirty+0x1f2/0x300
Jan 20 15:31:40 bac1f6065n kernel: [ 244.768712] PGD 2a645067 PUD 3be85067 PMD 0
Jan 20 15:31:40 bac1f6065n kernel: [ 244.768824] Oops: 0000 1 SMP
Jan 20 15:31:40 bac1f6065n kernel: [ 244.768922] Modules linked in: cpuid vmw_vsock_vmci_transport iosf_mbi coretemp crct10dif_pclmul crc32_pclmul sha256_ssse3 sha256_generic hmac drbg ansi_cprng ppdev aesni_intel aes_x86_64 lrw gf128mul evdev glue_helper ablk_helper vmw_balloon cryptd pcspkr psmouse serio_raw battery shpchp vmwgfx ttm drm_kms_helper parport_pc drm i2c_piix4 8250_fintek parport acpi_cpufreq processor ac button nf_conntrack_tftp nf_conntrack bonding drbd lru_cache libcrc32c autofs4 ext4 crc16 mbcache jbd2 virtio_blk virtio_net virtio_pci virtio_ring virtio kvm vsock vmw_pvscsi sg sd_mod sr_mod cdrom ata_generic crc32c_intel vmxnet3 mptspi scsi_transport_spi mptscsih mptbase vmw_vmci ata_piix libata scsi_mod
Jan 20 15:31:40 bac1f6065n kernel: [ 244.770796] CPU: 0 PID: 9694 Comm: mount Not tainted 4.3.0-0.bpo.1-amd64 #1 Debian 4.3.3-5~bpo8+1
Jan 20 15:31:40 bac1f6065n kernel: [ 244.771808] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 09/30/2014
Jan 20 15:31:40 bac1f6065n kernel: [ 244.773842] task: ffff88003bca1300 ti: ffff880039968000 task.ti: ffff880039968000
Jan 20 15:31:40 bac1f6065n kernel: [ 244.774928] RIP: 0010:[<ffffffff811fc822>] [<ffffffff811fc822>] __mark_inode_dirty+0x1f2/0x300
Jan 20 15:31:40 bac1f6065n kernel: [ 244.776064] RSP: 0018:ffff88003996bbc8 EFLAGS: 00010246
Jan 20 15:31:40 bac1f6065n kernel: [ 244.777223] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000019
Jan 20 15:31:40 bac1f6065n kernel: [ 244.778411] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8800362eab88
Jan 20 15:31:40 bac1f6065n kernel: [ 244.779607] RBP: ffff8800362eab30 R08: 0000000000000000 R09: 0000000000000000
Jan 20 15:31:40 bac1f6065n kernel: [ 244.780818] R10: ffff8800391eed68 R11: 0000000000000000 R12: ffff88003dba91f0
Jan 20 15:31:40 bac1f6065n kernel: [ 244.782051] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88003dba9278
Jan 20 15:31:40 bac1f6065n kernel: [ 244.783280] FS: 00007fd858fb9840(0000) GS:ffff88003fc00000(0000) knlGS:0000000000000000
Jan 20 15:31:40 bac1f6065n kernel: [ 244.784540] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan 20 15:31:40 bac1f6065n kernel: [ 244.785817] CR2: 0000000000000018 CR3: 000000003a095000 CR4: 00000000000006f0
Jan 20 15:31:40 bac1f6065n kernel: [ 244.787374] Stack:
Jan 20 15:31:40 bac1f6065n kernel: [ 244.788697] ffffffff81b0d6c0 ffff8800391285d8 ffff88003bf9a400 0000000000000001
Jan 20 15:31:40 bac1f6065n kernel: [ 244.790092] 0000000000000000 ffff88003c2f3000 ffffffffa023f014 0000000000000000
Jan 20 15:31:40 bac1f6065n kernel: [ 244.791506] ffff88003c2f3000 ffff88003bf9a400 0000000000000000 ffff88003bc26000
Jan 20 15:31:40 bac1f6065n kernel: [ 244.792936] Call Trace:
Jan 20 15:31:40 bac1f6065n kernel: [ 244.794427] [<ffffffffa023f014>] ? ext4_commit_super+0x1a4/0x270 [ext4]
Jan 20 15:31:40 bac1f6065n kernel: [ 244.795914] [<ffffffffa0241746>] ? ext4_setup_super+0x106/0x160 [ext4]
Jan 20 15:31:40 bac1f6065n kernel: [ 244.797402] [<ffffffffa024421f>] ? ext4_fill_super+0x1bef/0x3420 [ext4]
Jan 20 15:31:40 bac1f6065n kernel: [ 244.798869] [<ffffffff812ed649>] ? snprintf+0x49/0x60
Jan 20 15:31:40 bac1f6065n kernel: [ 244.800358] [<ffffffff81172c89>] ? register_shrinker+0x69/0x90
Jan 20 15:31:40 bac1f6065n kernel: [ 244.801886] [<ffffffff811d2e6c>] ? sget+0x38c/0x3c0
Jan 20 15:31:40 bac1f6065n kernel: [ 244.803372] [<ffffffffa0242630>] ? ext4_calculate_overhead+0x380/0x380 [ext4]
Jan 20 15:31:40 bac1f6065n kernel: [ 244.804849] [<ffffffff811d3191>] ? mount_bdev+0x1a1/0x1d0
Jan 20 15:31:40 bac1f6065n kernel: [ 244.806312] [<ffffffff811ad83f>] ? alloc_pages_current+0x8f/0x100
Jan 20 15:31:40 bac1f6065n kernel: [ 244.807762] [<ffffffff811d3a66>] ? mount_fs+0x36/0x170
Jan 20 15:31:40 bac1f6065n kernel: [ 244.809196] [<ffffffff811eed64>] ? vfs_kern_mount+0x64/0x100
Jan 20 15:31:40 bac1f6065n kernel: [ 244.810616] [<ffffffff811f11bf>] ? do_mount+0x21f/0xd30
Jan 20 15:31:40 bac1f6065n kernel: [ 244.811995] [<ffffffff811f1fc9>] ? SyS_mount+0x99/0xf0
Jan 20 15:31:40 bac1f6065n kernel: [ 244.813325] [<ffffffff81589376>] ? system_call_fast_compare_end+0xc/0x6b
Jan 20 15:31:40 bac1f6065n kernel: [ 244.814709] Code: 03 48 8b 7b 08 48 83 c3 10 89 ea 4c 89 e6 ff d0 48 8b 03 48 85 c0 75 e9 e9 45 fe ff ff 4c 89 e7 e8 24 ee ff ff 48 89 c5 48 8b 00 <f6> 40 18 02 75 27 48 8b 55 08 83 e2 01 75 1e 48 8b 48 30 48 c7 
Jan 20 15:31:40 bac1f6065n kernel: [ 244.818856] RIP [<ffffffff811fc822>] __mark_inode_dirty+0x1f2/0x300
Jan 20 15:31:40 bac1f6065n kernel: [ 244.820141] RSP <ffff88003996bbc8>
Jan 20 15:31:40 bac1f6065n kernel: [ 244.821396] CR2: 0000000000000018
Jan 20 15:31:40 bac1f6065n kernel: [ 244.822654] --[ end trace b9602dcbc1ee51b1 ]--
Jan 20 15:31:40 bac1f6065n kernel: [ 244.847512] block drbd1: State change failed: Device is held open by someone
Jan 20 15:31:40 bac1f6065n kernel: [ 244.848765] block drbd1: state =
{ cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate r----- }
+++++++++++++++++++++++++++++++++++++

This seems to be coming from fs/fs-writeback.c (line 2063):

0x5ad2 is in __mark_inode_dirty (fs/fs-writeback.c:2063).
2058	struct list_head *dirty_list;
2059	bool wakeup_bdi = false;
2060	
2061	wb = locked_inode_to_wb_and_lock_list(inode);
2062	
2063	WARN(bdi_cap_writeback_dirty(wb->bdi) &&
2064	!test_bit(WB_registered, &wb->state),
2065	"bdi-%s not registered\n", wb->bdi->name);
2066	
2067	inode->dirtied_when = jiffies;

In another occasion, already with the new 4.3.3-7~bpo8+1 kernel, the WARN is print (no Oops):

+++++++++++++++++++++++++++++++++++++
Jan 22 14:12:10 bac1f70c8n kernel: [ 7031.790038] block drbd1: Suspended AL updates
Jan 22 14:12:10 bac1f70c8n kernel: [ 7031.790041] block drbd1: disk( Attaching -> Inconsistent )
Jan 22 14:12:10 bac1f70c8n kernel: [ 7031.790044] block drbd1: attached to UUIDs 0000000000000004:0000000000000000:0000000000000000:0000000000000000
Jan 22 14:12:10 bac1f70c8n kernel: [ 7031.793120] drbd r0: conn( StandAlone -> Unconnected )
Jan 22 14:12:10 bac1f70c8n kernel: [ 7031.793130] drbd r0: Starting receiver thread (from drbd_w_r0 [23936])
Jan 22 14:12:10 bac1f70c8n kernel: [ 7031.795370] drbd r0: receiver (re)started
Jan 22 14:12:10 bac1f70c8n kernel: [ 7031.795381] drbd r0: conn( Unconnected -> WFConnection )
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.531242] block drbd1: role( Secondary -> Primary ) disk( Inconsistent -> UpToDate )
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.531859] block drbd1: Forced to consider local data as UpToDate!
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.531865] block drbd1: new current UUID 7ED1C316EA7CAA49:0000000000000004:0000000000000000:0000000000000000
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.647785] EXT4-fs (drbd1): Mount option "nouser_xattr" will be removed by 3.5
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.647785] Contact linux-ext4@vger.kernel.org if you think we should keep it.
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.647785]
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.647790] EXT4-fs (drbd1): Mount option "noacl" will be removed by 3.5
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.647790] Contact linux-ext4@vger.kernel.org if you think we should keep it.
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.647790]
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.653295] EXT4-fs (drbd1): barriers disabled
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658219] -----------[ cut here ]-----------
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658226] WARNING: CPU: 0 PID: 24697 at /build/linux-kTc2b3/linux-4.3.3/fs/fs-writeback.c:2065 __mark_inode_dirty+0x21f/0x300()
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658227] bdi-block not registered
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658228] Modules linked in: cpuid xt_tcpudp ip6table_filter ip6_tables iptable_filter ip_tables x_tables vmw_vsock_vmci_transport iosf_mbi coretemp crct10dif_pclmul crc32_pclmul sha256_ssse3 sha256_generic hmac drbg ansi_cprng aesni_intel aes_x86_64 lrw gf128mul evdev glue_helper ablk_helper psmouse ppdev serio_raw cryptd vmw_balloon pcspkr nf_conntrack_tftp nf_conntrack acpi_cpufreq processor parport_pc parport vmwgfx ttm drm_kms_helper drm i2c_piix4 8250_fintek shpchp battery ac button bonding drbd lru_cache libcrc32c autofs4 ext4 crc16 mbcache jbd2 virtio_blk virtio_net virtio_pci virtio_ring virtio kvm vsock sg sd_mod sr_mod cdrom ata_generic crc32c_intel vmxnet3 vmw_pvscsi ata_piix libata vmw_vmci scsi_mod
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658335] CPU: 0 PID: 24697 Comm: mount Not tainted 4.3.0-0.bpo.1-amd64 #1 Debian 4.3.3-7~bpo8+1
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658336] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 09/30/2014
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658338] 0000000000000000 00000000e6c78383 ffffffff812e1889 ffff88002a5f3b60
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658340] ffffffff81074451 0000000000000000 ffff88002a5f3bb8 ffff88003dba81f0
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658342] 0000000000000000 0000000000000000 ffffffff810744dc ffffffff818193eb
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658343] Call Trace:
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658351] [<ffffffff812e1889>] ? dump_stack+0x40/0x57
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658354] [<ffffffff81074451>] ? warn_slowpath_common+0x81/0xb0
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658356] [<ffffffff810744dc>] ? warn_slowpath_fmt+0x5c/0x80
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658358] [<ffffffff811fb68d>] ? locked_inode_to_wb_and_lock_list+0x4d/0xc0
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658359] [<ffffffff811fc84f>] ? __mark_inode_dirty+0x21f/0x300
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658376] [<ffffffffa01e9014>] ? ext4_commit_super+0x1a4/0x270 [ext4]
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658385] [<ffffffffa01eb746>] ? ext4_setup_super+0x106/0x160 [ext4]
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658393] [<ffffffffa01ee21f>] ? ext4_fill_super+0x1bef/0x3420 [ext4]
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658395] [<ffffffff812ed649>] ? snprintf+0x49/0x60
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658399] [<ffffffff81172c89>] ? register_shrinker+0x69/0x90
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658403] [<ffffffff811d2e6c>] ? sget+0x38c/0x3c0
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658411] [<ffffffffa01ec630>] ? ext4_calculate_overhead+0x380/0x380 [ext4]
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658413] [<ffffffff811d3191>] ? mount_bdev+0x1a1/0x1d0
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658416] [<ffffffff811ad83f>] ? alloc_pages_current+0x8f/0x100
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658421] [<ffffffff811d3a66>] ? mount_fs+0x36/0x170
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658424] [<ffffffff811eed64>] ? vfs_kern_mount+0x64/0x100
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658426] [<ffffffff811f11bf>] ? do_mount+0x21f/0xd30
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658428] [<ffffffff811f1fc9>] ? SyS_mount+0x99/0xf0
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658432] [<ffffffff8158a3f6>] ? system_call_fast_compare_end+0xc/0x6b
Jan 22 14:13:13 bac1f70c8n kernel: [ 7095.658434] --[ end trace e68b1f35b0d2408c ]--/0x90
+++++++++++++++++++++++++++++++++++++

--- End Message ---
--- Begin Message --- 
Hi

This bug was filed for a very old kernel or the bug is old itself
without resolution.

If you can reproduce it with

- the current version in unstable/testing
- the latest kernel from backports

please reopen the bug, see https://www.debian.org/Bugs/server-control
for details.

Regards,
Salvatore

--- End Message ---
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