Hello! I think I found a bug for you, guys. The situation was as following. At first, I set up LVM with a single lv (with nilfs) for root. Everything worked fine. Then I decided to create a separate home partition. I shrank the root a bit, created another nilfs logical volume for home. Then I shrank root/expanded home a couple of times. In the end I got the bug, when tried to mount the home. I'm pretty much confident (say 90%) that I didn't mess things up by shrinking a partition before resizing the appropriate filesystem. Now every time I try to mount home I get the following: [ 1367.830334] BUG: unable to handle kernel NULL pointer dereference at 00000048 [ 1367.831581] IP: [<d0d7a08e>] nilfs_load_super_block+0x17e/0x280 [nilfs2] [ 1367.832098] *pde = 00000000 [ 1367.832596] Oops: 0000 [#1] PREEMPT SMP [ 1367.833098] Modules linked in: ext2 mbcache snd_intel8x0 e1000 ppdev snd_ac97_codec ac97_bus snd_pcm snd_page_alloc vboxvideo(O) snd_timer drm snd agpgart parport_pc soundcore parport i2c_piix4 i2c_core serio_raw psmouse pcspkr evdev joydev processor ac button vboxsf(O) vboxguest(O) nilfs2 dm_mod sr_mod cdrom sd_mod usbhid hid ahci libahci libata ohci_hcd scsi_mod usbcore usb_common [ 1367.833562] [ 1367.833562] Pid: 710, comm: mount.nilfs2 Tainted: G O 3.2.6-2-ARCH #1 innotek GmbH VirtualBox [ 1367.833562] EIP: 0060:[<d0d7a08e>] EFLAGS: 00010202 CPU: 0 [ 1367.833562] EIP is at nilfs_load_super_block+0x17e/0x280 [nilfs2] [ 1367.833562] EAX: c9cb6400 EBX: ce845e00 ECX: 00000000 EDX: 00000000 [ 1367.833562] ESI: 00000001 EDI: 00000000 EBP: ca9bbe08 ESP: ca9bbdcc [ 1367.833562] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 1367.833562] Process mount.nilfs2 (pid: 710, ti=ca9ba000 task=cf054d20 task.ti=ca9ba000) [ 1367.833562] Stack: [ 1367.833562] 00000400 ce845e1c 0013f800 00000000 00000000 00000000 cc7d6c00 00000400 [ 1367.833562] 00000001 00000001 00000001 00000001 ce845e00 ca9bbe30 cc7d6c00 ca9bbe40 [ 1367.833562] d0d7a87b ca9bbe30 00000114 000080d0 00000200 00034460 cc7d6db0 00000000 [ 1367.833562] Call Trace: [ 1367.833562] [<d0d7a87b>] init_nilfs+0x4b/0x2e0 [nilfs2] [ 1367.833562] [<d0d6f707>] nilfs_mount+0x447/0x5b0 [nilfs2] [ 1367.833562] [<c01f33a4>] ? pcpu_alloc+0x714/0x810 [ 1367.833562] [<c02d2add>] ? ida_get_new_above+0x1ad/0x230 [ 1367.833562] [<c02d2add>] ? ida_get_new_above+0x1ad/0x230 [ 1367.833562] [<c0226636>] mount_fs+0x36/0x180 [ 1367.833562] [<c01f34af>] ? __alloc_percpu+0xf/0x20 [ 1367.833562] [<c023d961>] vfs_kern_mount+0x51/0xa0 [ 1367.833562] [<c023ddae>] do_kern_mount+0x3e/0xe0 [ 1367.833562] [<c023f189>] do_mount+0x169/0x700 [ 1367.833562] [<c01eeb29>] ? strndup_user+0x49/0x70 [ 1367.833562] [<c023fa9b>] sys_mount+0x6b/0xa0 [ 1367.833562] [<c04abd1f>] sysenter_do_call+0x12/0x28 [ 1367.833562] Code: 53 18 8b 43 20 89 4b 18 8b 4b 24 89 53 1c 89 43 24 89 4b 20 8b 43 20 c7 43 2c 00 00 00 00 23 75 e8 8b 50 68 89 53 28 8b 54 b3 20 <8b> 72 48 8b 7a 4c 8b 55 08 89 b3 84 00 00 00 89 bb 88 00 00 00 [ 1367.833562] EIP: [<d0d7a08e>] nilfs_load_super_block+0x17e/0x280 [nilfs2] SS:ESP 0068:ca9bbdcc [ 1367.833562] CR2: 0000000000000048 [ 1367.855410] ---[ end trace 0b5fed15fa08cff2 ]--- The kernel is the standard archlinux "stocK" kernel run within virtualbox: Linux arch1 3.2.6-2-ARCH #1 SMP PREEMPT Thu Feb 16 10:23:00 UTC 2012 i686 Intel(R) Core(TM) i5 CPU 650 @ 3.20GHz GenuineIntel GNU/Linux I can provide the partition superblock, if necessary. Cheers! -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
