Date: Thu, 19 Feb 2026 15:40:02 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 285853] hv_hid: kernel built with -O0 panics in hv_hid_probe() Message-ID: <bug-285853-27103-nsncm42nXR@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-285853-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285853 Zhenlei Huang <zlei@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kib@FreeBSD.org --- Comment #3 from Zhenlei Huang <zlei@FreeBSD.org> --- (In reply to Lexi Winter from comment #0) Some interesting finding. In x86-64 `00 00` is disassembled to `add %al,(%rax)`. So probably > (kgdb) disass hv_hid_probe > Dump of assembler code for function hv_hid_probe: > 0xffffffff83d11000 <+0>: add %al,(%rax) > 0xffffffff83d11002 <+2>: add %al,(%rax) > 0xffffffff83d11004 <+4>: add %al,(%rax) > 0xffffffff83d11006 <+6>: add %al,(%rax) > 0xffffffff83d11008 <+8>: add %al,(%rax) > 0xffffffff83d1100a <+10>: add %al,(%rax) > 0xffffffff83d1100c <+12>: add %al,(%rax) > 0xffffffff83d1100e <+14>: (bad) > 0xffffffff83d1100f <+15>: loopne 0xffffffff83d11038 <hv_hid_probe+56> hints a block of the address 0xffffffff83d11000 is filled with zeroes ? Emm, is it possible the CPU instruction cache is not flushed on loading the hv_hid.ko module ? CC Konstantin for better insights on that. -- You are receiving this mail because: You are the assignee for the bug.home | help
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