Unhandled fault after ICMP echo request

[mgalemin]

Pre conditions: Beagleboard-xM has IP address configured.

Execution: Send ICMP request from external host (i.e. ping the Beagleboard-xM).

Expected result: Beagleboard-xM responds to ICMP requests.

Result: Linux kernel throws "Unhandled fault" after receiving ICMP echo request. Please see full log below.

[root@buildroot ~]# [ 25.104858] Unhandled fault: alignment exception (0x001) at 0xde4d002a [ 25.111846] Internal error: : 1 [#1] SMP [ 25.115905] last sysfs file: [ 25.119018] Modules linked in: [ 25.122192] CPU: 0 Not tainted (2.6.39.1-mg00 #1) [ 25.127441] PC is at icmp_echo+0x58/0xb4 [ 25.131530] LR is at icmp_rcv+0x2f8/0x398 [ 25.135681] pc : [] lr : [] psr: 60000113 [ 25.135681] sp : c0629de8 ip : 00000001 fp : 00000000 [ 25.147644] r10: dec7f8c0 r9 : c1014f08 r8 : c1014f14 [ 25.153076] r7 : 00000008 r6 : de475080 r5 : de4d0016 r4 : dec7f8c0 [ 25.159851] r3 : 00000000 r2 : c0629df4 r1 : de4d002a r0 : dec7f8c0 [ 25.166625] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel [ 25.174224] Control: 10c5387d Table: 9e4e4019 DAC: 00000017 [ 25.180206] Process swapper (pid: 0, stack limit = 0xc06282f8) [ 25.186279] Stack: (0xc0629de8 to 0xc062a000) [ 25.190826] 9de0: 0201a8c0 a0000113 dec7f8c0 de475080 00000000 00000000 [ 25.199310] 9e00: 00000000 c06840c4 00000000 00000002 c1014f08 60000113 00000001 c00c67e4 [ 25.207824] 9e20: 00000001 00000000 00000000 c03dca28 00000000 00000000 fe020020 00000000 [ 25.216339] 9e40: dec7f8c0 c0406228 c0405f30 c04a2e78 de4d0016 dec7f8c0 00000008 c03dcb1c [ 25.224853] 9e60: 00000001 00000000 c03dca28 deffe000 00000000 de4d0016 dec7f8c0 c03dc998 [ 25.233337] 9e80: deffe000 00000001 c063ef98 deffe000 c063ea74 00000000 00000008 c03bc1bc [ 25.241851] 9ea0: 00000001 00000000 c03bbebc 00000000 00000040 c1014f14 00000000 dec7f8c0 [ 25.250366] 9ec0: c03bc2b4 c063ea94 00000001 c1014fb4 c1014f00 00000000 00000001 c03bc2c0 [ 25.258850] 9ee0: c03bc22c c1014fb4 c1014f00 c0628000 00000001 0000012c 00000040 c03bcbf8 [ 25.267364] 9f00: c062a04c ffff7698 00000000 00000001 c062a04c c0628000 00000100 00000009 [ 25.275878] 9f20: 413fc082 00000003 00000000 c009c120 c062db4c 00000448 00000000 c0628000 [ 25.284393] 9f40: 00000000 c1010120 c0641f3c 80000000 413fc082 00000000 00000000 c009c6b4 [ 25.292877] 9f60: 0000004d c005208c c0640710 ffffffff fa200000 c046335c 00000001 00000004 [ 25.301391] 9f80: c0629fb0 05e35d23 c063e47c c0036e6c c1010120 c0641f3c 80000000 413fc082 [ 25.309906] 9fa0: 00000000 00000000 00000000 c0629fc0 c00c70a8 c006e91c 20000013 ffffffff [ 25.318389] 9fc0: c063e47c c0036e6c c1010120 c005d1e8 00000000 c0008a44 c000849c 0000060a [ 25.326904] 9fe0: 80000100 c0036e6c 10c53c7d c063d8dc c0036e68 8000803c 00000000 00000000 [ 25.335418] from [ 25.343780] from [ 25.353546] from [ 25.363769] from [ 25.373626] from [ 25.383575] from [ 25.392913] from [ 25.401977] from [ 25.410461] from [ 25.418731] from [ 25.427124] Exception stack(0xc0629f78 to 0xc0629fc0) [ 25.432373] 9f60: 00000001 00000004 [ 25.440887] 9f80: c0629fb0 05e35d23 c063e47c c0036e6c c1010120 c0641f3c 80000000 413fc082 [ 25.449401] 9fa0: 00000000 00000000 00000000 c0629fc0 c00c70a8 c006e91c 20000013 ffffffff [ 25.457916] from [ 25.466796] from [ 25.475463] from [ 25.484069] from <8000803c> [ 25.491943] Code: e3530000 1a000012 e5941080 e28d200c (e8910003) [ 25.498321] ---[ end trace f2aad9aa0c3f80a2 ]--- [ 25.503143] Kernel panic - not syncing: Fatal exception in interrupt

[uolli]

Hi Max,

checking here - http://git.mansr.com/?p=linux-xm;a=commitdiff;h=d204c927d856cbe7d7fa90b0703d1ab5b7c6be80 for how to fix this issue, i have tested, it working.

Li

[mgalemin]

Fixed.