Hi folks, Reporting this here too as per the "How do I report bugs and issues?" section on the wiki.
I managed to trigger the following BUG_ON() whilst running 'apt purge':- [ 85.635305] kernel BUG at fs/btrfs/ctree.c:3163! [ 85.635350] invalid opcode: 0000 [#1] SMP [ 85.635398] Modules linked in: nf_nat_irc nf_nat_ftp nf_conntrack_irc nf_conntrack_ftp ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat xt_NFLOG xt_limit xt_helper xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack iptable_filter ip_tables x_tables nfnetlink_log nfnetlink bridge stp llc dummy crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd psmouse serio_raw virtio_rng rng_core autofs4 [ 85.635717] CPU: 0 PID: 1365 Comm: apt Not tainted 3.19.5-dt1 #1 [ 85.635795] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5.1-0-g8936dbb-20141113_115728-nilsson.home.kraxel.org 04/01/2014 [ 85.635897] task: ffff88002c607530 ti: ffff880028240000 task.ti: ffff880028240000 [ 85.635952] RIP: 0010:[<ffffffff812552e1>] [<ffffffff812552e1>] btrfs_set_item_key_safe+0x171/0x180 [ 85.636021] RSP: 0018:ffff880028243a28 EFLAGS: 00010246 [ 85.636071] RAX: 0000000000000000 RBX: ffff88002b291920 RCX: 00000000001a0000 [ 85.636129] RDX: 0000000000000000 RSI: ffff880028243b4e RDI: ffff880028243a47 [ 85.636189] RBP: ffff880028243a36 R08: ffff88002b04f858 R09: ffff880000000000 [ 85.636244] R10: 0000160000000000 R11: 0000000000001000 R12: ffff880028202000 [ 85.636297] R13: 000000000000004f R14: ffff88002b04f7b8 R15: ffff880028243b4e [ 85.636349] FS: 00007fb76c086740(0000) GS:ffff88002fc00000(0000) knlGS:0000000000000000 [ 85.636407] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.636455] CR2: 00007fb769471594 CR3: 0000000028344000 CR4: 00000000001406f0 [ 85.636511] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.636564] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.636603] Stack: [ 85.636642] ffff88002800e8c0 39ca880028202000 006c00000000000b ca00000000001a00 [ 85.636699] 6c00000000000b39 00000000001a0000 0000000000001000 ffff88002b04f7b8 [ 85.636757] ffff88002b291920 000000000019e000 00000000001a0000 0000000001800000 [ 85.636844] Call Trace: [ 85.636867] [<ffffffff8128efb1>] ? __btrfs_drop_extents+0xbe1/0xdb0 [ 85.636867] [<ffffffff8112782e>] ? set_page_dirty+0xe/0x60 [ 85.636867] [<ffffffff812b56a4>] ? btrfs_log_changed_extents+0x284/0x5c0 [ 85.636867] [<ffffffff812590c2>] ? btrfs_insert_empty_items+0x72/0xc0 [ 85.636867] [<ffffffff812ba08d>] ? btrfs_log_inode+0x78d/0x810 [ 85.636867] [<ffffffff812ba3a9>] ? btrfs_log_inode_parent+0x1f9/0x570 [ 85.636867] [<ffffffff811801e5>] ? __sb_start_write+0x45/0xe0 [ 85.636867] [<ffffffff812bb5eb>] ? btrfs_log_dentry_safe+0x5b/0x80 [ 85.636867] [<ffffffff81290b73>] ? btrfs_sync_file+0x1d3/0x310 [ 85.636867] [<ffffffff8115365e>] ? SyS_msync+0x1fe/0x260 [ 85.636867] [<ffffffff8165988d>] ? system_call_fastpath+0x16/0x1b [ 85.636867] Code: 7c 24 1f 4c 89 fe 48 89 44 24 28 0f b6 44 24 16 88 44 24 27 48 8b 44 24 0e 48 89 44 24 1f e8 07 f3 ff ff 85 c0 0f 8f 41 ff ff ff <0f> 0b 0f 1f 44 00 00 0f 0b 66 0f 1f 44 00 00 0f 1f 44 00 00 41 00 0f 0b 66 0f 1f 44 00 00 0f 1f 44 00 00 41 [ 85.636867] RIP [<ffffffff812552e1>] btrfs_set_item_key_safe+0x171/0x180 [ 85.636867] RSP <ffff880028243a28> [ 85.637872] ---[ end trace 409d47a41cf477bf ]--- A few seconds later the system froze. A single corrupt, temporary file was left behind according to a manual btrfsck run, which I zapped. I've tried to reproduce but can't, and a very quick scan of Google returns a single match, so this may be hard to hit. Note: this is vanilla 3.19.5 running on a KVM guest. And just in case it's helpful: (#) root@apple:~ >>> mount |grep vda3 /dev/vda3 on / type btrfs (rw,nodiratime,relatime,compress=lzo,space_cache) -- Best, Francis -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
