Date: Sun, 30 Jan 2011 18:59:24 +0000 From: Alexander Best <arundel@freebsd.org> To: Chagin Dmitry <dchagin@freebsd.org> Cc: oleg.ginzburg@nevosoft.ru, freebsd-emulation@freebsd.org Subject: Re: kern/145024: [linux] kernel crash by linux.ko module with nooptions COMPAT_FREEBSD32 Message-ID: <20110130185924.GA19604@freebsd.org> In-Reply-To: <20110130184157.GA11074@dchagin.static.corbina.ru> References: <201101301827.p0UIRrnk089915@freefall.freebsd.org> <20110130184157.GA11074@dchagin.static.corbina.ru>
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On Sun Jan 30 11, Chagin Dmitry wrote: > On Sun, Jan 30, 2011 at 06:27:53PM +0000, arundel@freebsd.org wrote: > > Old Synopsis: [linux] [panic] kernel crash by linux.ko module with nooptions COMPAT_FREEBSD32 > > New Synopsis: [linux] kernel crash by linux.ko module with nooptions COMPAT_FREEBSD32 > > > > State-Changed-From-To: open->analyzed > > State-Changed-By: arundel > > State-Changed-When: Sun Jan 30 18:13:13 UTC 2011 > > State-Changed-Why: > > We have two possibilities in order to fix this issue: > > > > 1) Add something like the following somewhere in sys/amd/linux32: > > > > #ifndef COMPAT_FREEBSD32 > > #error "linux emulation requires COMPAT_FREEBSD32 \ > > option for non 32 bit architectures" > > #endif > > > > 2) Find a way to avoid the freebsd32_exec_copyin_args() call in > > linux32_machdep.c. I believe this is the only place in the sys/amd/linux32 > > code that depends on sys/amd64/ia32 code. > > > > NB: I've removed the panic tag from this PR. I was able to reproduce the issue, > > however a panic didn't occur. The problem is that > > freebsd32_exec_copyin_args() wasn't compiled into the kernel and loading the > > linux kernel module thus fails. > > > > hi, close report, see r205014. i verified the issue with a recent HEAD just a few minutes ago. the point is that users should be informed, when they build the linuxulator on 64 bit architectures without the COMPAT_FREEBSD32, because that will give them a broken linuxulator. either that or remove the freebsd32_exec_copyin_args() call from the linuxulator to make it independent from COMPAT_FREEBSD32 code. cheers. alex > > -- > Have fun! > chd -- a13x
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