* NULL pointer dereference while balancing
@ 2021-11-01 22:40 Ian Kelling
0 siblings, 0 replies; only message in thread
From: Ian Kelling @ 2021-11-01 22:40 UTC (permalink / raw)
To: linux-btrfs
It happened near the end of a data balance. The filesystem stopped doing
writes. I rebooted and it seems to be working fine again. Just sharing
in case it is useful.
# uname -a
Linux hostname-redacted.fsf.org 5.11.0-38-generic #42~20.04.1-Ubuntu SMP Tue Sep 28 20:41:07 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
# btrfs --version
btrfs-progs v5.14.1
# btrfs fi show
Label: none uuid: cdbab81e-20ec-49e6-904c-649f6096b112
Total devices 6 FS bytes used 17.08TiB
devid 1 size 14.55TiB used 8.61TiB path /dev/mapper/btrfs0
devid 2 size 14.55TiB used 8.61TiB path /dev/mapper/btrfs2
devid 3 size 14.55TiB used 8.61TiB path /dev/mapper/btrfs1
devid 4 size 14.55TiB used 8.55TiB path /dev/mapper/btrfs3
devid 5 size 14.55TiB used 8.54TiB path /dev/mapper/btrfs4
devid 6 size 14.55TiB used 8.54TiB path /dev/mapper/btrfs5
# btrfs fi df /srv/backup-online
Data, RAID1C3: total=17.03TiB, used=16.97TiB
System, RAID1C3: total=32.00MiB, used=3.20MiB
Metadata, RAID1C3: total=120.00GiB, used=119.12GiB
GlobalReserve, single: total=512.00MiB, used=176.00KiB
dmesg output
[762015.588861] BUG: kernel NULL pointer dereference, address: 0000000000000001
[762015.590331] #PF: supervisor read access in kernel mode
[762015.590331] #PF: error_code(0x0000) - not-present page
[762015.590331] PGD 10576c067 P4D 10576c067 PUD 89b4de067 PMD 0
[762015.590331] Oops: 0000 [#1] SMP NOPTI
[762015.590331] CPU: 3 PID: 7545 Comm: rest-server Not tainted 5.11.0-38-generic #42~20.04.1-Ubuntu
[762015.590331] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
[762015.638083] RIP: 0010:__set_page_dirty_buffers+0x5a/0x110
[762015.638083] Code: 00 49 8b 04 24 f6 c4 20 74 35 49 8b 04 24 f6 c4 20 0f 84 bc 00 00 00 49 8b 44 24 28 48 89 c2 eb 09 48 8b 52 08 48 39 d0 74 15 <48> 8b 0a 83 e1 02 75 ef f0 80 0a 02 48 8b 52 08 48 39 d0 75 eb 4c
[762015.638083] RSP: 0018:ffffba364777fba8 EFLAGS: 00010202
[762015.638083] RAX: 0000000000000001 RBX: ffff9fa9e055ca00 RCX: 0000000000000000
[762015.638083] RDX: 0000000000000001 RSI: ffffffffc02bf23d RDI: ffff9fa9e055ca84
[762015.638083] RBP: ffffba364777fbc0 R08: 0000000000000000 R09: ffffba364777fb14
[762015.638083] R10: ffff9fa20330d800 R11: ffff9fa208397000 R12: ffffe2278211b000
[762015.638083] R13: ffff9fa9e055ca84 R14: ffff9fa9e055c680 R15: 0000000000000000
[762015.638083] FS: 000000c000681890(0000) GS:ffff9faa3fac0000(0000) knlGS:0000000000000000
[762015.638083] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[762015.638083] CR2: 0000000000000001 CR3: 0000000106d7c000 CR4: 00000000000406e0
[762015.638083] Call Trace:
[762015.638083] set_page_dirty+0x61/0xc0
[762015.638083] btrfs_dirty_pages+0xd7/0x110 [btrfs]
[762015.638083] __btrfs_write_out_cache+0x34f/0x4b0 [btrfs]
[762015.638083] btrfs_write_out_cache+0x82/0xf0 [btrfs]
[762015.638083] btrfs_start_dirty_block_groups+0x1ff/0x4f0 [btrfs]
[762015.638083] btrfs_commit_transaction+0xc2/0xa70 [btrfs]
[762015.638083] ? start_transaction+0xd5/0x590 [btrfs]
[762015.638083] ? dput+0x62/0x320
[762015.638083] btrfs_sync_file+0x35d/0x480 [btrfs]
[762015.638083] vfs_fsync_range+0x49/0x80
[762015.638083] ? __fget_light+0x62/0x80
[762015.638083] do_fsync+0x3d/0x70
[762015.638083] __x64_sys_fsync+0x14/0x20
[762015.638083] do_syscall_64+0x38/0x90
[762015.638083] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[762015.638083] RIP: 0033:0x4b57fb
[762015.638083] Code: fb ff eb bd e8 06 50 fb ff e9 61 ff ff ff cc e8 7b 1c fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
[762015.638083] RSP: 002b:000000c0000697e0 EFLAGS: 00000206 ORIG_RAX: 000000000000004a
[762015.638083] RAX: ffffffffffffffda RBX: 000000c00002e800 RCX: 00000000004b57fb
[762015.638083] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000b
[762015.638083] RBP: 000000c000069820 R08: 0000000000000001 R09: fffff80000000001
[762015.638083] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
[762015.638083] R13: 000000c00024bc80 R14: 000080c000400000 R15: 0000000000000000
[762015.638083] Modules linked in: dm_crypt algif_skcipher af_alg nf_log_ipv6 xt_hl ip6t_rt ip6t_REJECT nf_reject_ipv6 nf_log_ipv4 nf_log_common xt_LOG xt_recent xt_limit xt_tcpudp xt_addrtype xt_conntrack kvm_amd ccp ipt_REJECT kvm nf_reject_ipv4 crct10dif_pclmul crc32_pclmul ip6table_filter ghash_clmulni_intel ip6_tables aesni_intel nf_conntrack_netbios_ns nf_conntrack_broadcast crypto_simd input_leds joydev cryptd nf_nat_ftp glue_helper serio_raw nf_nat nf_conntrack_ftp nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter sch_fq_codel bpfilter sunrpc ip_tables x_tables autofs4 xfs btrfs blake2b_generic xor raid6_pq libcrc32c virtio_net psmouse net_failover virtio_blk failover floppy
[762015.638083] CR2: 0000000000000001
[762016.017540] ---[ end trace d88a46a2c96f3118 ]---
[762016.024758] RIP: 0010:__set_page_dirty_buffers+0x5a/0x110
[762016.032920] Code: 00 49 8b 04 24 f6 c4 20 74 35 49 8b 04 24 f6 c4 20 0f 84 bc 00 00 00 49 8b 44 24 28 48 89 c2 eb 09 48 8b 52 08 48 39 d0 74 15 <48> 8b 0a 83 e1 02 75 ef f0 80 0a 02 48 8b 52 08 48 39 d0 75 eb 4c
[762016.055583] RSP: 0018:ffffba364777fba8 EFLAGS: 00010202
[762016.061236] RAX: 0000000000000001 RBX: ffff9fa9e055ca00 RCX: 0000000000000000
[762016.068966] RDX: 0000000000000001 RSI: ffffffffc02bf23d RDI: ffff9fa9e055ca84
[762016.077362] RBP: ffffba364777fbc0 R08: 0000000000000000 R09: ffffba364777fb14
[762016.086150] R10: ffff9fa20330d800 R11: ffff9fa208397000 R12: ffffe2278211b000
[762016.095117] R13: ffff9fa9e055ca84 R14: ffff9fa9e055c680 R15: 0000000000000000
[762016.105129] FS: 000000c000681890(0000) GS:ffff9faa3fac0000(0000) knlGS:0000000000000000
[762016.116998] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[762016.124153] CR2: 0000000000000001 CR3: 0000000106d7c000 CR4: 00000000000406e0
[762040.956585] BTRFS critical (device dm-5): corrupt leaf: root=1 block=1371110457344 slot=6 ino=4227, invalid mode: has 00 expect valid S_IF* bit(s)
[762040.997627] BTRFS info (device dm-5): leaf 1371110457344 gen 255620 total ptrs 60 free space 8393 owner 1
[762041.009561] item 0 key (4221 1 0) itemoff 16123 itemsize 160
[762041.022141] inode generation 0 size 262144 mode 100600
[762041.028192] item 1 key (4221 108 0) itemoff 16070 itemsize 53
[762041.040761] extent data disk bytenr 5483252187136 nr 262144
[762041.048162] extent data offset 0 nr 262144 ram 262144
[762041.053693] item 2 key (4224 1 0) itemoff 15910 itemsize 160
[762041.063935] inode generation 0 size 262144 mode 100600
[762041.074938] item 3 key (4224 108 0) itemoff 15857 itemsize 53
[762041.088608] extent data disk bytenr 5483257683968 nr 262144
[762041.102739] extent data offset 0 nr 262144 ram 262144
[762041.120975] item 4 key (4225 1 0) itemoff 15697 itemsize 160
[762041.130203] inode generation 0 size 262144 mode 100600
[762041.137582] item 5 key (4225 108 0) itemoff 15644 itemsize 53
[762041.145184] extent data disk bytenr 5483265597440 nr 262144
[762041.152361] extent data offset 0 nr 262144 ram 262144
[762041.161727] item 6 key (4227 1 0) itemoff 15484 itemsize 160
[762041.170297] inode generation 0 size 262144 mode 0
[762041.176653] item 7 key (4227 108 0) itemoff 15431 itemsize 53
[762041.183734] extent data disk bytenr 5483283075072 nr 262144
[762041.190740] extent data offset 0 nr 262144 ram 262144
[762041.197287] item 8 key (4229 1 0) itemoff 15271 itemsize 160
[762041.204643] inode generation 177936 size 262144 mode 100600
[762041.212830] item 9 key (4229 108 0) itemoff 15218 itemsize 53
[762041.219857] extent data disk bytenr 4553824010240 nr 262144
[762041.226694] extent data offset 0 nr 262144 ram 262144
[762041.236668] item 10 key (4231 1 0) itemoff 15058 itemsize 160
[762041.243789] inode generation 177936 size 262144 mode 100600
[762041.250168] item 11 key (4231 108 0) itemoff 15005 itemsize 53
[762041.258015] extent data disk bytenr 4554353876992 nr 262144
[762041.265384] extent data offset 0 nr 262144 ram 262144
[762041.271538] item 12 key (4233 1 0) itemoff 14845 itemsize 160
[762041.278874] inode generation 177302 size 262144 mode 100600
[762041.286131] item 13 key (4233 108 0) itemoff 14792 itemsize 53
[762041.292222] extent data disk bytenr 4554982940672 nr 262144
[762041.298621] extent data offset 0 nr 262144 ram 262144
[762041.304914] item 14 key (4234 1 0) itemoff 14632 itemsize 160
[762041.312524] inode generation 177936 size 262144 mode 100600
[762041.312527] item 15 key (4234 108 0) itemoff 14579 itemsize 53
[762041.312527] extent data disk bytenr 4550949793792 nr 262144
[762041.312527] extent data offset 0 nr 262144 ram 262144
[762041.312527] item 16 key (4236 1 0) itemoff 14419 itemsize 160
[762041.312527] inode generation 177302 size 262144 mode 100600
[762041.312527] item 17 key (4236 108 0) itemoff 14366 itemsize 53
[762041.312527] extent data disk bytenr 4555210395648 nr 262144
[762041.312527] extent data offset 0 nr 262144 ram 262144
[762041.312527] item 18 key (4237 1 0) itemoff 14206 itemsize 160
[762041.312528] inode generation 187358 size 262144 mode 100600
[762041.384297] item 19 key (4237 108 0) itemoff 14153 itemsize 53
[762041.384305] extent data disk bytenr 2705354170368 nr 262144
[762041.384308] extent data offset 0 nr 262144 ram 262144
[762041.384310] item 20 key (4240 1 0) itemoff 13993 itemsize 160
[762041.384314] inode generation 177302 size 262144 mode 100600
[762041.384317] item 21 key (4240 108 0) itemoff 13940 itemsize 53
[762041.384320] extent data disk bytenr 4555236409344 nr 262144
[762041.384323] extent data offset 0 nr 262144 ram 262144
[762041.384325] item 22 key (4243 1 0) itemoff 13780 itemsize 160
[762041.384328] inode generation 177302 size 262144 mode 100600
[762041.384330] item 23 key (4243 108 0) itemoff 13727 itemsize 53
[762041.384333] extent data disk bytenr 4555236671488 nr 262144
[762041.384335] extent data offset 0 nr 262144 ram 262144
[762041.384337] item 24 key (4245 1 0) itemoff 13567 itemsize 160
[762041.384340] inode generation 177938 size 262144 mode 100600
[762041.384343] item 25 key (4245 108 0) itemoff 13514 itemsize 53
[762041.384346] extent data disk bytenr 4613660700672 nr 262144
[762041.501407] extent data offset 0 nr 262144 ram 262144
[762041.501413] item 26 key (4248 1 0) itemoff 13354 itemsize 160
[762041.501418] inode generation 186493 size 262144 mode 100600
[762041.501422] item 27 key (4248 108 0) itemoff 13301 itemsize 53
[762041.501427] extent data disk bytenr 2638844817408 nr 262144
[762041.501429] extent data offset 0 nr 262144 ram 262144
[762041.501432] item 28 key (4251 1 0) itemoff 13141 itemsize 160
[762041.501436] inode generation 177302 size 262144 mode 100600
[762041.501439] item 29 key (4251 108 0) itemoff 13088 itemsize 53
[762041.501442] extent data disk bytenr 4555284959232 nr 262144
[762041.501445] extent data offset 0 nr 262144 ram 262144
[762041.501447] item 30 key (4253 1 0) itemoff 12928 itemsize 160
[762041.501451] inode generation 177938 size 262144 mode 100600
[762041.501453] item 31 key (4253 108 0) itemoff 12875 itemsize 53
[762041.501457] extent data disk bytenr 4613717594112 nr 262144
[762041.501459] extent data offset 0 nr 262144 ram 262144
[762041.501461] item 32 key (4254 1 0) itemoff 12715 itemsize 160
[762041.501464] inode generation 177938 size 262144 mode 100600
[762041.501466] item 33 key (4254 108 0) itemoff 12662 itemsize 53
[762041.501469] extent data disk bytenr 4613278470144 nr 262144
[762041.501470] extent data offset 0 nr 262144 ram 262144
[762041.501473] item 34 key (4256 1 0) itemoff 12502 itemsize 160
[762041.501476] inode generation 177302 size 262144 mode 100600
[762041.501478] item 35 key (4256 108 0) itemoff 12449 itemsize 53
[762041.501481] extent data disk bytenr 4555288244224 nr 262144
[762041.501483] extent data offset 0 nr 262144 ram 262144
[762041.501485] item 36 key (4257 1 0) itemoff 12289 itemsize 160
[762041.501488] inode generation 177936 size 262144 mode 100600
[762041.501490] item 37 key (4257 108 0) itemoff 12236 itemsize 53
[762041.501493] extent data disk bytenr 4552479526912 nr 262144
[762041.501495] extent data offset 0 nr 262144 ram 262144
[762041.501497] item 38 key (4258 1 0) itemoff 12076 itemsize 160
[762041.501501] inode generation 177302 size 262144 mode 100600
[762041.501503] item 39 key (4258 108 0) itemoff 12023 itemsize 53
[762041.501506] extent data disk bytenr 4555311644672 nr 262144
[762041.501508] extent data offset 0 nr 262144 ram 262144
[762041.501510] item 40 key (4259 1 0) itemoff 11863 itemsize 160
[762041.501513] inode generation 255487 size 262144 mode 100600
[762041.501515] item 41 key (4259 108 0) itemoff 11810 itemsize 53
[762041.501518] extent data disk bytenr 5222257565696 nr 262144
[762041.501521] extent data offset 0 nr 262144 ram 262144
[762041.501523] item 42 key (4263 1 0) itemoff 11650 itemsize 160
[762041.501526] inode generation 175984 size 262144 mode 100600
[762041.501528] item 43 key (4263 108 0) itemoff 11597 itemsize 53
[762041.501532] extent data disk bytenr 2616231034880 nr 262144
[762041.501533] extent data offset 0 nr 262144 ram 262144
[762041.797059] item 44 key (4266 1 0) itemoff 11437 itemsize 160
[762041.797068] inode generation 177938 size 262144 mode 100600
[762041.797071] item 45 key (4266 108 0) itemoff 11384 itemsize 53
[762041.797076] extent data disk bytenr 4614042877952 nr 262144
[762041.797079] extent data offset 0 nr 262144 ram 262144
[762041.797081] item 46 key (4268 1 0) itemoff 11224 itemsize 160
[762041.797085] inode generation 177938 size 262144 mode 100600
[762041.797089] item 47 key (4268 108 0) itemoff 11171 itemsize 53
[762041.797092] extent data disk bytenr 4614010925056 nr 262144
[762041.797094] extent data offset 0 nr 262144 ram 262144
[762041.797097] item 48 key (4270 1 0) itemoff 11011 itemsize 160
[762041.797100] inode generation 255487 size 262144 mode 100600
[762041.797103] item 49 key (4270 108 0) itemoff 10958 itemsize 53
[762041.877750] extent data disk bytenr 5222258798592 nr 262144
[762041.877755] extent data offset 0 nr 262144 ram 262144
[762041.877758] item 50 key (4272 1 0) itemoff 10798 itemsize 160
[762041.877763] inode generation 255487 size 262144 mode 100600
[762041.877766] item 51 key (4272 108 0) itemoff 10745 itemsize 53
[762041.877770] extent data disk bytenr 5222260088832 nr 262144
[762041.877772] extent data offset 0 nr 262144 ram 262144
[762041.877774] item 52 key (4275 1 0) itemoff 10585 itemsize 160
[762041.877778] inode generation 255487 size 262144 mode 100600
[762041.877780] item 53 key (4275 108 0) itemoff 10532 itemsize 53
[762041.877784] extent data disk bytenr 5222260510720 nr 262144
[762041.877786] extent data offset 0 nr 262144 ram 262144
[762041.877788] item 54 key (4277 1 0) itemoff 10372 itemsize 160
[762041.877791] inode generation 255487 size 262144 mode 100600
[762041.877793] item 55 key (4277 108 0) itemoff 10319 itemsize 53
[762041.877796] extent data disk bytenr 5222262603776 nr 262144
[762041.877798] extent data offset 0 nr 262144 ram 262144
[762041.877800] item 56 key (4279 1 0) itemoff 10159 itemsize 160
[762041.877814] inode generation 255487 size 262144 mode 100600
[762041.877816] item 57 key (4279 108 0) itemoff 10106 itemsize 53
[762041.877819] extent data disk bytenr 5222276358144 nr 262144
[762041.877821] extent data offset 0 nr 262144 ram 262144
[762041.877823] item 58 key (4281 1 0) itemoff 9946 itemsize 160
[762041.877826] inode generation 255487 size 262144 mode 100600
[762041.877828] item 59 key (4281 108 0) itemoff 9893 itemsize 53
[762041.877831] extent data disk bytenr 5222289219584 nr 262144
[762041.877833] extent data offset 0 nr 262144 ram 262144
[762041.877837] BTRFS error (device dm-5): block=1371110457344 write time tree block corruption detected
--
Ian Kelling | Senior Systems Administrator, Free Software Foundation
GPG Key: B125 F60B 7B28 7FF6 A2B7 DF8F 170A F0E2 9542 95DF
https://fsf.org | https://gnu.org
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2021-11-01 22:40 NULL pointer dereference while balancing Ian Kelling
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