RB532A bricked after attempted upgrade to 6.29.1

Hello!

In the last weekend (yes, on sunday!) i tried to upgrade a RB532A (mipsle) router to 6.29.1. There weren’t any problems with the upload. After i did the reboot, the router died.

Today i managed to connect to it via rs232 and tried netinstall, but this happened:

RouterBoard 532A

CPU frequency: 266 MHz
  Memory size:  64 MB

Press any key within 2 seconds to enter setup..
kernel not found
trying bootp protocol... OK
Got IP address: 192.168.0.3
resolved mac address F0:DE:F1:25:E5:ED
transfer started .......................... transfer ok, time=2.62s
setting up elf image... OK
jumping to kernel code
Oops[#1]:
Cpu 0
$ 0   : 00000000 00000001 00000000 00000001
$ 4   : 83e01200 00000004 803d0000 00010000
$ 8   : 73666873 83e0136c 00000000 83c0d4c0
$12   : 810825c4 810825c8 0001b900 ffffffff
$16   : 83e01200 803e2d30 8020c8d4 83ca9b10
$20   : 00008001 00000000 00000001 83ca9b00
$24   : 00000000 00000000
$28   : 83c20000 83c21cf0 fffffff3 8020c7d8
Hi    : 0000000b
Lo    : 00000000
epc   : 8020c7d0 squashfs_kill_sb+0x14/0x38
    Not tainted
ra    : 8020c7d8 squashfs_kill_sb+0x1c/0x38
Status: 1010fc03    KERNEL EXL IE
Cause : 90000008
BadVA : 00000000
PrId  : 0001800a (MIPS 4Kc)
Process swapper (pid: 1, threadinfo=83c20000, task=83c1c000, tls=00000000)
Stack : 80427518 80420000 83c0c7b8 00000000 83e01200 801b227c 83e01200 00008001
        8020c8d4 83ca9b10 00008001 83e01200 ffffffea 801b2e8c 000000d0 803d0000
        801b1fd0 80420000 80427518 83c0b6c0 803e2d30 803e2d30 83ca9b10 801b3a30
        83dde000 ffffffea 803e2d30 83ca9b00 83ca9b10 00008001 83c0b6c0 803e2d30
        83ca9b00 801ca630 01c0d8cc 801c99e0 83dde001 00000000 00008001 83ca9b10
        ...
Call Trace:
[<8020c7d0>] squashfs_kill_sb+0x14/0x38
[<801b227c>] deactivate_locked_super+0xb4/0xfc
[<801b2e8c>] mount_nodev+0x6c/0xc0
[<801b3a30>] mount_fs+0x20/0xe0
[<801ca630>] vfs_kern_mount+0x5c/0xd4
[<801caa84>] do_kern_mount+0x44/0xf4
[<801cc508>] do_mount+0x51c/0x670
[<801cc700>] sys_mount+0x94/0xe4
[<803f1cb8>] mount_block_root+0x140/0x2d4
[<803f2090>] prepare_namespace+0x1d0/0x214
[<803f1a50>] kernel_init+0x11c/0x124
[<80107c98>] kernel_thread_helper+0x10/0x18


Code: afb00010  8c820194  00808021 <0c06c65b> 8c440000  0c06c818  02002021  8fbf0014  8e040194
---[ end trace 98cbc720c26daf32 ]---
Kernel panic - not syncing: Attempted to kill init!
Rebooting in 1 seconds..

I already tried resetting the configuration and formating the nand.

Any clues?