dmesg

[560717.513222] EXT4-fs (sdc1): mounted filesystem with ordered data mode. Opts: (null)
[562910.917018] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
[562910.917169] IP: [<ffffffff811eddf2>] ext4_ext_remove_space+0x821/0xb7a
[562910.917292] PGD 2679067 PUD 26d7067 PMD 0
[562910.917375] Oops: 0000 [#1] SMP
[562910.917439] CPU 0
[562910.917474] Modules linked in: ata_generic pata_acpi radeon ttm drm_kms_helper drm i2c_algo_bit tg3 pata_atiixp shpchp pt3_drv(O) sp5100_tco i2c_piix4 i2c_core pcspkr amd64_edac_mod edac_core edac_mce_amd k10temp
[562910.917884]
[562910.917914] Pid: 1939, comm: rm Tainted: G        W  O 3.4.9-gentoo #8 HP ProLiant MicroServer
[562910.918067] RIP: 0010:[<ffffffff811eddf2>]  [<ffffffff811eddf2>] ext4_ext_remove_space+0x821/0xb7a
[562910.918226] RSP: 0018:ffff880003c3bca8  EFLAGS: 00010246
[562910.918315] RAX: 0000000000000000 RBX: ffff880005673330 RCX: 0000000000000001
[562910.918437] RDX: 0000000000000001 RSI: 0000000000000002 RDI: 000000000390b100
[562910.918557] RBP: ffff880003c3bd98 R08: 000000000390b100 R09: ffff880005673300
[562910.918677] R10: ffffffff811ee034 R11: ffff880003c3bc88 R12: 0000000000000000
[562910.918800] R13: ffff880005673300 R14: ffff880002d734b8 R15: 0000000000000000
[562910.918920] FS:  00007fc06f68b700(0000) GS:ffff880077c00000(0000) knlGS:0000000018832840
[562910.919054] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[562910.919152] CR2: 0000000000000028 CR3: 0000000001729000 CR4: 00000000000007f0
[562910.919272] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[562910.919392] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[562910.919512] Process rm (pid: 1939, threadinfo ffff880003c3a000, task ffff88006e12dbc0)
[562910.919642] Stack:
[562910.919678]  ffff880003c3bcb8 ffffffff811c977b ffff880003c3bd18 ffffffff811cd031
[562910.919820]  ffff880003c3bd48 ffff880000000017 ffff8800730fb000 00000000fffffff5
[562910.919962]  00000001ffffffff 00000000039134b8 ffff8800730fb000 ffff88004d24d00c
[562910.920104] Call Trace:
[562910.920153]  [<ffffffff811c977b>] ? brelse+0xe/0x10
[562910.920239]  [<ffffffff811cd031>] ? ext4_mark_iloc_dirty+0x495/0x4f2
[562910.920347]  [<ffffffff811efa7d>] ext4_ext_truncate+0xe7/0x168
[562910.920447]  [<ffffffff811cb36c>] ext4_truncate+0x89/0xd7
[562910.920541]  [<ffffffff811ceb7c>] ext4_evict_inode+0x1df/0x2d5
[562910.920641]  [<ffffffff8113514a>] evict+0x92/0x149
[562910.920723]  [<ffffffff8113538f>] iput+0x18e/0x196
[562910.920805]  [<ffffffff8112d29e>] do_unlinkat+0x107/0x15b
[562910.920899]  [<ffffffff8112550f>] ? sys_newfstatat+0x29/0x34
[562910.920996]  [<ffffffff8112dc62>] sys_unlinkat+0x24/0x26
[562910.921088]  [<ffffffff8166e239>] system_call_fastpath+0x16/0x1b
[562910.921188] Code: e0 ff ff 48 63 5d b8 48 6b db 30 48 03 5d b0 e9 fa 00 00 00 48 63 55 b8 48 6b da 30 48 03 5d b0 48 83 7b 20 00 75 0c 48 8b 43 28 <48> 8b 40 28 48 89 43 20 48 8b 43 18 48 85 c0 75 20 48 8b 43 20
[562910.921808] RIP  [<ffffffff811eddf2>] ext4_ext_remove_space+0x821/0xb7a
[562910.921925]  RSP <ffff880003c3bca8>
[562910.921985] CR2: 0000000000000028
[562910.967708] ---[ end trace b5b0689c94d9f4db ]---