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[Bug 1869497] Re: x86_cpu_gdb_read_register segfaults when gdb requests
From: |
Philippe Mathieu-Daudé |
Subject: |
[Bug 1869497] Re: x86_cpu_gdb_read_register segfaults when gdb requests registers |
Date: |
Sat, 18 Apr 2020 13:39:55 -0000 |
Fixed in commit bbc40fefcee0d69d61ceaf8c0695d2ce43cdc87b.
** Changed in: qemu
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1869497
Title:
x86_cpu_gdb_read_register segfaults when gdb requests registers
Status in QEMU:
Fix Committed
Bug description:
When attempting to attach to the gdbstub, a segfault occurs.
I traced this down to a problem in a call to gdb_get_reg16 where the
mem_buf was being treated like a uint8_t* instead of a GByteArray.
The buffer passed to gdb_get_reg16 ends up passing an invalid
GByteArray pointer, which subsequentlycauses a segfault in memcpy.
I have a fix for this - just need to educate myself on how to submit a
patch.
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