Date: Mon, 25 Jul 2022 23:27:40 +0000 From: bugzilla-noreply@freebsd.org To: riscv@FreeBSD.org Subject: [Bug 265439] copyin() repeatedly traps on some illegal user addresses on RISC-V Message-ID: <bug-265439-40250-VFdHzo0teK@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-265439-40250@https.bugs.freebsd.org/bugzilla/> References: <bug-265439-40250@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D265439 Jessica Clarke <jrtc27@freebsd.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|New |Open CC| |jrtc27@freebsd.org Assignee|riscv@FreeBSD.org |markj@FreeBSD.org --- Comment #1 from Jessica Clarke <jrtc27@freebsd.org> --- This is a regression in 31218f3209ac ("riscv: Add support for enabling SV48 mode"), right? We do check VIRT_IS_VALID in page_fault_handler and will SIG= SEGV the process or panic the kernel depending on which mode faulted, and copyin= etc will check the address is for userspace before using it, but they check VM_MAX(_)USER_ADDRESS which is now the SV48 version even when SV39 is in us= e. --=20 You are receiving this mail because: You are the assignee for the bug.=
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