Bug?

[Sascha Hauer]

Hi Wjatscheslaw,

On Wed, Jul 06, 2016 at 04:02:45PM +0200, Wjatscheslaw Stoljarski wrote:
> Hi,
> 
> overwriting a file in barebox, didn't work properly.

I have never seen this. Can you reproduce this any maybe even have a
command sequence that fails? A quick 'cp' from one file to another
existing file did not show this problem.

Sascha


> 
> ---------------------- 8< -------------------------
> unable to handle NULL pointer dereference at address 0x00000000
> pc : [<2ff20f86>]    lr : [<2ff20eff>]
> sp : 2ffef808  ip : 201383fc  fp : 00000000
> r10: 2003cc94  r9 : 20138665  r8 : 00000269
> r7 : 00000000  r6 : 1ff9a5d0  r5 : 00001fff  r4 : 00000269
> r3 : 00000000  r2 : 00001fff  r1 : 00000000  r0 : 201383fc
> Flags: Nzcv  IRQs off  FIQs off  Mode SVC_32
> [<2ff20f86>] (ramfs_read+0xba/0xc8) from [<2ff228d5>] (__read+0x41/0x58)
> [<2ff228d5>] (__read+0x41/0x58) from [<2ff22f6f>] (read+0x2b/0x48)
> [<2ff22f6f>] (read+0x2b/0x48) from [<2ff1ca31>] (copy_file+0x85/0x118)
> [<2ff1ca31>] (copy_file+0x85/0x118) from [<2ff14ead>] (do_cp+0x109/0x128)
> [<2ff14ead>] (do_cp+0x109/0x128) from [<2ff03209>] (execute_command+0x21/0x48)
> [<2ff03209>] (execute_command+0x21/0x48) from [<2ff07443>] (run_list_real+0x56b/0x638)
> [<2ff07443>] (run_list_real+0x56b/0x638) from [<2ff06da9>] (parse_stream_outer+0xd9/0x164)
> [<2ff06da9>] (parse_stream_outer+0xd9/0x164) from [<2ff076d1>] (run_shell+0x31/0x60)
> [<2ff076d1>] (run_shell+0x31/0x60) from [<2ff03209>] (execute_command+0x21/0x48)
> [<2ff03209>] (execute_command+0x21/0x48) from [<2ff07443>] (run_list_real+0x56b/0x638)
> [<2ff07443>] (run_list_real+0x56b/0x638) from [<2ff0715d>] (run_list_real+0x285/0x638)
> 
> [<2ff28519>] (unwind_backtrace+0x1/0x58) from [<2ff00cd1>] (panic+0x1d/0x2c)
> [<2ff00cd1>] (panic+0x1d/0x2c) from [<2ff289bd>] (do_exception+0xd/0x10)
> [<2ff289bd>] (do_exception+0xd/0x10) from [<2ff28a1d>] (do_data_abort+0x21/0x2c)
> [<2ff28a1d>] (do_data_abort+0x21/0x2c) from [<2ff28714>] (do_abort_6+0x48/0x54)
> ---------------------- 8< -------------------------
> 
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