x86-64 panics early in boot when built with KDEBUG_LEVEL 0
|Reported by:||anevilyak||Owned by:||xyzzy|
This only seems to occur with level 0 specifically ; levels 1 and 2 boot normally here.
A screenshot of the panic screen is attached, along with a readelf dump of the corresponding kernel image. As best as I can tell, the backtrace leading up to the page fault itself was:
9 ffffffff81004e10 (+ 192) ffffffff80133568 memcpy_generic 10 ffffffff81004ed0 (+ 64) ffffffff800fe02e _ZL15write_to_bufferP11ri 11 ffffffff81004f10 (+ 16) ffffffff800fe324 ring_buffer_write 12 ffffffff81004f20 (+ 48) ffffffff8008dfa6 syslog_write 13 ffffffff81004f50 (+ 128) ffffffff8008ed4f debug_init_post_settings 14 ffffffff81004fd0 (+ 32) ffffffff8005d0d3 _start
This seems somewhat puzzling though, since debug_init_post_settings doesn't in fact call syslog_write that I can see, so I may have done something wrong on that front. This panic is 100% reproducible, so please let me know if I can enable anything else to help get more information.