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Bug#629932: Happens to me with .39.1 , works with .38



Hi!
I am having this issue too.

what should be noted:  this is vanilla kernel, custom build,  ARM
architecture.
adding eth0 to bridge is sometimes lethal and sometimes not.
these messages were obtained from serial console.

doing "ip a" made the terminal stuck..
even though sshd listens, I can't connect to it anymore..
If I put more interfaces in the bridge, the bridge works as if nothing was
wrong


brctl addif br0 eth0
[  224.792297] Unable to handle kernel NULL pointer dereference at virtual
address 00000000
[  224.800842] pgd = eef2c000
[  224.803680] [00000000] *pgd=afaa9831, *pte=00000000, *ppte=00000000
[  224.810424] Internal error: Oops: 80000007 [#1] SMP
[  224.815551] last sysfs file:
/sys/devices/virtual/net/br0/bridge/forward_delay
[  224.823150] Modules linked in: bridge stp llc
[  224.827728] CPU: 0    Not tainted  (2.6.39.1-omap4 #4)
[  224.833129] PC is at 0x0
[  224.835876] LR is at br_change_mtu+0x60/0x78 [bridge]
[  224.841186] pc : [<00000000>]    lr : [<bf00e268>]    psr: 200f0013
[  224.841186] sp : ef259e60  ip : eef9b808  fp : 00000000
[  224.853271] r10: 00000001  r9 : ef258000  r8 : 00000000
[  224.858764] r7 : eef9b900  r6 : c17a2540  r5 : c17a2000  r4 : 000005d4
[  224.865631] r3 : 00000000  r2 : c17a2560  r1 : bf018985  r0 : c17a2994
[  224.872467] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment
user
[  224.879974] Control: 10c5387d  Table: aef2c04a  DAC: 00000015
[  224.886016] Process brctl (pid: 4285, stack limit = 0xef2582f8)
[  224.892242] Stack: (0xef259e60 to 0xef25a000)
[  224.896820] 9e60: c17a2000 c1515000 c17a2540 c0391174 c17a2000 bf00ff28
00000000 ef259ed8
[  224.905426] 9e80: c17a2000 000089a2 00000000 00000000 00000000 c03936d0
000089a2 bea89bbc
[  224.914031] 9ea0: c0c07c40 c0393d00 00000000 00000001 0000006c 00000000
00000000 00000000
[  224.922607] 9ec0: 00000000 00000002 00000000 ef67e314 ee8ae0a0 c00b08f0
00307262 00000000
[  224.931213] 9ee0: 00000000 00000000 00000002 bea89d78 40108450 bea89e7a
00000000 00000000
[  224.939819] 9f00: ef67e040 ef88a300 bea89bbc bea89bbc ef67e060 00000000
ef258000 00000000
[  224.948425] 9f20: 00000000 c011fbb0 00000000 ef820620 ef258000 c0666488
00000004 c004bf08
[  224.957000] 9f40: ef258000 00000000 00000000 c0129580 00000002 c1612300
00000000 ef958ee0
[  224.965606] 9f60: 00000004 c004bf08 00000000 ef88a300 bea89bbc 000089a2
00000003 00000000
[  224.974212] 9f80: ef258000 c011fc70 00000003 00000000 bea89e80 bea89e84
00000001 00000036
[  224.982818] 9fa0: c004bf08 c004bd40 bea89e80 bea89e84 00000003 000089a2
bea89bbc bea89bbc
[  224.991424] 9fc0: bea89e80 bea89e84 00000001 00000036 bea89d78 00000000
40118000 00000000
[  224.999999] 9fe0: 40271c30 bea89b94 0000b0c3 40271c3c 80000110 00000003
00000000 00000000
[  225.008636] [<bf00e268>] (br_change_mtu+0x60/0x78 [bridge]) from
[<c0391174>] (dev_set_mtu+0x40/0x78)
[  225.018371] [<c0391174>] (dev_set_mtu+0x40/0x78) from [<bf00ff28>]
(br_add_if+0x300/0x3d8 [bridge])
[  225.027893] [<bf00ff28>] (br_add_if+0x300/0x3d8 [bridge]) from [<c03936d0>]
(dev_ifsioc+0x294/0x2b8)
[  225.037506] [<c03936d0>] (dev_ifsioc+0x294/0x2b8) from [<c0393d00>]
(dev_ioctl+0x60c/0x704)
[  225.046295] [<c0393d00>] (dev_ioctl+0x60c/0x704) from [<c011fbb0>]
(do_vfs_ioctl+0x4e0/0x554)
[  225.055267] [<c011fbb0>] (do_vfs_ioctl+0x4e0/0x554) from [<c011fc70>]
(sys_ioctl+0x4c/0x6c)
[  225.064086] [<c011fc70>] (sys_ioctl+0x4c/0x6c) from [<c004bd40>]
(ret_fast_syscall+0x0/0x3c)
[  225.072967] Code: bad PC value
[  225.077423] ---[ end trace 4bf8acca703efac4 ]---
Segmentation fault
root@TPB:~# ls
this is root's home's content



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