kernel BUG at fs/btrfs/extent-tree.c:5299!

kernel BUG at fs/btrfs/extent-tree.c:5299!

[Andrej Podzimek]

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Hello,

a backtrace from a machine running a Btrfs RAID0 array with two disks is attached. I've never seen this bug before. Please let me know if you need any further info/experiments.

Andrej

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[ 2040.038677] ------------[ cut here ]------------
[ 2040.038696] kernel BUG at fs/btrfs/extent-tree.c:5299!
[ 2040.038712] invalid opcode: 0000 [#1] PREEMPT SMP
[ 2040.038733] last sysfs file: /sys/devices/system/cpu/cpu15/cache/index2/shared_cpu_map
[ 2040.038755] CPU 1
[ 2040.038761] Modules linked in: ipv6 cpufreq_ondemand freq_table microcode sr_mod cdrom joydev usbhid hid uas usb_storage uhci_hcd ioatdma bnx2x sg i7core_edac evdev ehci_hcd pcspkr bnx2 dcdbas iTCO_wdt edac_core dca usbcore ghes iTCO_vendor_support power_meter mdio hed processor button aesni_intel cryptd aes_x86_64 aes_generic crc32c_intel btrfs zlib_deflate crc32c libcrc32c sd_mod ses enclosure megaraid_sas scsi_mod
[ 2040.038960]
[ 2040.038968] Pid: 1716, comm: btrfs-endio-wri Not tainted 2.6.39-ARCH #1 Dell Inc. PowerEdge M610/02Y41P
[ 2040.039000] RIP: 0010:[<ffffffffa008b452>]  [<ffffffffa008b452>] find_free_extent.constprop.68+0xae2/0xb00 [btrfs]
[ 2040.039045] RSP: 0000:ffff8805d387d620  EFLAGS: 00010297
[ 2040.039060] RAX: 0000000000000003 RBX: ffff880c09d6f800 RCX: 0000000000000000
[ 2040.039080] RDX: 0000000000000001 RSI: ffff880c095ae3c8 RDI: 000000000000000c
[ 2040.039099] RBP: ffff8805d387d700 R08: 0000000000000001 R09: 0000000000001000
[ 2040.039118] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[ 2040.039152] R13: ffff880c095ae3c8 R14: 0000000000000003 R15: 0000000000000000
[ 2040.039185] FS:  0000000000000000(0000) GS:ffff88062fc00000(0000) knlGS:0000000000000000
[ 2040.039235] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 2040.039265] CR2: 00007fa04978ff40 CR3: 0000000be98c3000 CR4: 00000000000006e0
[ 2040.039298] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 2040.039331] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 2040.039365] Process btrfs-endio-wri (pid: 1716, threadinfo ffff8805d387c000, task ffff8806082bbf90)
[ 2040.039415] Stack:
[ 2040.039437]  0000000000010000 ffffffff8113c394 0000000000000000 0000000000000000
[ 2040.039497]  0000000000000000 ffffffffffffffff 0000000300000000 ffff880c09d6eec0
[ 2040.039555]  ffff880c09ef1800 0001000000000003 0000000000011000 ffff880c09d6ee00
[ 2040.039613] Call Trace:
[ 2040.039641]  [<ffffffff8113c394>] ? kmem_cache_free+0x24/0x150
[ 2040.039680]  [<ffffffffa008c2e9>] btrfs_reserve_extent+0xe9/0x220 [btrfs]
[ 2040.039722]  [<ffffffffa008c9f4>] btrfs_alloc_free_block+0xd4/0x330 [btrfs]
[ 2040.039766]  [<ffffffffa00c0773>] ? map_extent_buffer+0xd3/0xe0 [btrfs]
[ 2040.039805]  [<ffffffffa0078dee>] __btrfs_cow_block+0x15e/0x890 [btrfs]
[ 2040.039843]  [<ffffffffa0079638>] btrfs_cow_block+0x118/0x360 [btrfs]
[ 2040.039881]  [<ffffffffa007f0e7>] btrfs_search_slot+0x1d7/0x9f0 [btrfs]
[ 2040.039919]  [<ffffffffa0080aa8>] btrfs_insert_empty_items+0x78/0xd0 [btrfs]
[ 2040.039960]  [<ffffffffa00868ea>] alloc_reserved_file_extent+0x9a/0x200 [btrfs]
[ 2040.040015]  [<ffffffffa0089bc9>] run_clustered_refs+0x2f9/0x830 [btrfs]
[ 2040.040057]  [<ffffffffa00bf629>] ? set_extent_buffer_dirty+0x59/0xd0 [btrfs]
[ 2040.040092]  [<ffffffff8113c394>] ? kmem_cache_free+0x24/0x150
[ 2040.040130]  [<ffffffffa00da101>] ? btrfs_find_ref_cluster+0xc1/0x190 [btrfs]
[ 2040.040174]  [<ffffffffa008a1c8>] btrfs_run_delayed_refs+0xc8/0x220 [btrfs]
[ 2040.040216]  [<ffffffffa009bb4e>] __btrfs_end_transaction+0x6e/0x2b0 [btrfs]
[ 2040.040258]  [<ffffffffa009bde5>] btrfs_end_transaction+0x15/0x20 [btrfs]
[ 2040.040300]  [<ffffffffa00a1a84>] btrfs_finish_ordered_io+0x294/0x330 [btrfs]
[ 2040.040341]  [<ffffffffa00a1b6d>] btrfs_writepage_end_io_hook+0x4d/0xf0 [btrfs]
[ 2040.040396]  [<ffffffffa00bb6df>] end_bio_extent_writepage+0x12f/0x170 [btrfs]
[ 2040.040445]  [<ffffffff8118381d>] bio_endio+0x1d/0x40
[ 2040.040480]  [<ffffffffa0095156>] end_workqueue_fn+0x56/0x140 [btrfs]
[ 2040.040519]  [<ffffffffa00c8d35>] worker_loop+0x165/0x520 [btrfs]
[ 2040.040558]  [<ffffffffa00c8bd0>] ? btrfs_queue_worker+0x2f0/0x2f0 [btrfs]
[ 2040.040592]  [<ffffffff8107d6fc>] kthread+0x8c/0xa0
[ 2040.040622]  [<ffffffff813eac64>] kernel_thread_helper+0x4/0x10
[ 2040.040653]  [<ffffffff8107d670>] ? kthread_worker_fn+0x190/0x190
[ 2040.040685]  [<ffffffff813eac60>] ? gs_change+0x13/0x13
[ 2040.040714] Code: 01 00 00 00 e9 88 fa ff ff 0f 0b b8 e4 ff ff ff e9 35 fd ff ff be 6f 13 00 00 48 c7 c7 2c 93 0e a0 e8 e3 04 fd e0 e9 76 f5 ff ff <0f> 0b 44 89 e6 48 c7 c7 9c 93 0e a0 e8 8c 46 35 e1 b8 e4 ff ff
[ 2040.040950] RIP  [<ffffffffa008b452>] find_free_extent.constprop.68+0xae2/0xb00 [btrfs]
[ 2040.041008]  RSP <ffff8805d387d620>
[ 2040.041410] ---[ end trace 6469c53696f58a4b ]---

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