hi, mounting the image at http://www.cccmz.de/~snakebyte/ext4.56.img.bz2 listing the directories and touching a files produces a null pointer dereference with -rc3 (verified with -rc2 and current -git). I tested this on different boxes with the same result root@whiterabbit:~/testing/fsfuzzer-0.6-lmh# mount -o loop cfs/ext4.56.img -t ext4dev /media/test/ root@whiterabbit:~/testing/fsfuzzer-0.6-lmh# ls /media/test lost+found root@whiterabbit:~/testing/fsfuzzer-0.6-lmh# touch /media/test/file Killed If the ls is [29436.010601] EXT4-fs (/dev/loop0): Update your userspace programs to mount using ext4 [29436.010803] EXT4-fs (/dev/loop0): ext4dev backwards compatibility will go away by 2.6.31 [29436.028613] EXT4-fs (loop0): no journal [29436.028833] EXT4-fs (loop0): delayed allocation enabled [29436.056982] EXT4-fs: mballoc enabled [29436.061698] EXT4-fs (loop0): mounted filesystem without journal [29436.189556] EXT4-fs error (device loop0): ext4_claim_inode: reserved inode or inode > inodes count - block_group = 0, inode=10 [29436.189835] EXT4-fs (loop0): Remounting filesystem read-only [29436.202154] BUG: unable to handle kernel NULL pointer dereference at (null) [29436.202335] IP: [<c025977d>] ext4_decode_error+0x6d/0x90 [29436.202540] *pde = 00000000 [29436.202643] Oops: 0000 [#1] PREEMPT [29436.202835] last sysfs file: /sys/block/hdc/size [29436.202920] Modules linked in: [29436.203057] [29436.203057] Pid: 5197, comm: touch Not tainted (2.6.31-rc3-23244-g6847e15 #29) System Name [29436.203057] EIP: 0060:[<c025977d>] EFLAGS: 00010282 CPU: 0 [29436.203057] EIP is at ext4_decode_error+0x6d/0x90 [29436.203057] EAX: 00000000 EBX: c6555d58 ECX: c0a70886 EDX: ffffffe2 [29436.203057] ESI: c08fd80e EDI: c282cce4 EBP: c6555d40 ESP: c6555d2c [29436.203057] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068 [29436.203057] Process touch (pid: 5197, ti=c6555000 task=c44d41a0 task.ti=c6555000) [29436.203057] Stack: [29436.203057] 00000001 00000000 c0154fa2 c44d41a0 c9826e10 c6555d74 c025a948 00000001 [29436.203057] <0> 0000045b c44d41a0 0000045b c282cd98 c0252430 c282cce4 c6555d74 bede78d2 [29436.203057] <0> c282cd98 ffffffe2 c6555d94 c0252563 c0caefe0 c08fdba0 c0caefe0 c6555d94 [29436.203057] Call Trace: [29436.203057] [<c0154fa2>] ? mark_held_locks+0x52/0x70 [29436.203057] [<c025a948>] ? __ext4_std_error+0x28/0x90 [29436.203057] [<c0252430>] ? ext4_delete_inode+0x0/0x230 [29436.203057] [<c0252563>] ? ext4_delete_inode+0x133/0x230 [29436.203057] [<c0252430>] ? ext4_delete_inode+0x0/0x230 [29436.203057] [<c01d2976>] ? generic_delete_inode+0x96/0x140 [29436.203057] [<c01d2b57>] ? generic_drop_inode+0x137/0x1b0 [29436.203057] [<c01d2197>] ? iput+0x47/0x50 [29436.203057] [<c024a904>] ? ext4_new_inode+0xa64/0xe70 [29436.203057] [<c01cfc0b>] ? d_rehash+0x3b/0x50 [29436.203057] [<c0255881>] ? ext4_create+0xb1/0x120 [29436.203057] [<c01c9096>] ? vfs_create+0xb6/0x170 [29436.203057] [<c01cbf18>] ? do_filp_open+0x5d8/0x820 [29436.203057] [<c08e2377>] ? _spin_unlock+0x27/0x50 [29436.203057] [<c01be6bf>] ? do_sys_open+0x4f/0x100 [29436.203057] [<c0102d9a>] ? sysenter_exit+0xf/0x1a [29436.203057] [<c01be7d9>] ? sys_open+0x29/0x40 [29436.203057] [<c0102d6b>] ? sysenter_do_call+0x12/0x32 [29436.203057] Code: 6a 82 35 00 89 d9 85 c0 78 33 8d 74 26 00 83 c4 10 89 c8 5b 5d c3 85 c0 74 16 8b 80 d0 02 00 00 b9 86 08 a7 c0 8b 80 30 01 00 00 <f6> 00 02 74 de 83 c4 10 b9 a3 08 a7 c0 5b 89 c8 5d c3 31 c9 eb [29436.203057] EIP: [<c025977d>] ext4_decode_error+0x6d/0x90 SS:ESP 0068:c6555d2c [29436.203057] CR2: 0000000000000000 [29436.284374] ---[ end trace a3b07131cd2de900 ]--- 0xc025977d is in ext4_decode_error (fs/ext4/super.c:347). 342 break; 343 case -ENOMEM: 344 errstr = "Out of memory"; 345 break; 346 case -EROFS: 347 if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) 348 errstr = "Journal has aborted"; 349 else 350 errstr = "Readonly filesystem"; 351 break; 0xc0252563 is in ext4_delete_inode (fs/ext4/inode.c:225). 220 /* 221 * If we're going to skip the normal cleanup, we still need to 222 * make sure that the in-core orphan linked list is properly 223 * cleaned up. 224 */ 225 ext4_orphan_del(NULL, inode); 226 goto no_delete; 227 } 228 229 if (IS_SYNC(inode)) Regards, Eric -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
