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Description of problem:
when partnum >= 1185, part-get-gpt-type will give an error.
libguestfs: error: part_get_gpt_type: sgdisk /dev/sda -i 1185: *** Segmentation fault
Register dump:
RAX: 0000000000000000 RBX: 00000000019e6018 RCX: 0000000035383131
RDX: 0000000000353831 RSI: 0000000000000200 RDI: 00000000019e6018
RBP: 0000000000000000 R8 : 0000000000000000 R9 : 0000000000000002
...
but guestfish is still alive. It looks like a bug of sgdisk
Version-Release number of selected component (if applicable):
libguestfs-1.22.6-5.el7.x86_64
gdisk-0.8.6-1.el7.x86_64
How reproducible:
100%
Steps to Reproduce:
# guestfish -N fs part-disk /dev/sda gpt : part-get-gpt-type /dev/sda 1185
Actual result:
Gives a "Segmentation fault" error
Expect result:
Not return "Segmentation fault"
Additional info:
I tried "sgdisk /dev/sda -i 1185" in linux, it failed
# sgdisk /dev/sda -i 1185
***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format.
***************************************************************
Segmentation fault (core dumped)
Comment 1Richard W.M. Jones
2013-09-13 12:58:06 UTC
You were right that this is a bug in gdisk. Easily
reproducible on the command line:
$ sgdisk /dev/sda -i 1185
***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory.
***************************************************************
Segmentation fault (core dumped)
The stack trace is:
Program received signal SIGSEGV, Segmentation fault.
GPTPart::ShowDetails (this=0x851018, blockSize=512) at gptpart.cc:210
210 if (firstLBA != 0) {
(gdb) bt
#0 GPTPart::ShowDetails (this=0x851018, blockSize=512) at gptpart.cc:210
#1 0x000000000041015e in GPTData::ShowPartDetails (
this=this@entry=0x7fffffffc470, partNum=<optimized out>) at gpt.cc:1406
#2 0x00000000004193d1 in GPTDataCL::DoOptions (
this=this@entry=0x7fffffffc470, argc=argc@entry=4,
argv=argv@entry=0x7fffffffde48) at gptcl.cc:255
#3 0x0000000000402dd6 in main (argc=4, argv=0x7fffffffde48) at sgdisk.cc:20
This request was resolved in Red Hat Enterprise Linux 7.0.
Contact your manager or support representative in case you have further questions about the request.