Date: Wed, 16 Dec 2015 12:16:42 +0100 From: Oliver Pinter <oliver.pinter@hardenedbsd.org> To: Shawn Webb <shawn.webb@hardenedbsd.org> Cc: Fabian Keil <freebsd-listen@fabiankeil.de>, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: fork_findpid() - Fatal trap 12: page fault while in kernel mode Message-ID: <CAPQ4ffu3TZJGq=%2BJLmwPvds-y6p904-GdPZJ=uQ-vWb8poU=qQ@mail.gmail.com> In-Reply-To: <20151215192016.GC73098@mutt-hardenedbsd> References: <20151215174238.2d7cc3bb@fabiankeil.de> <20151215192016.GC73098@mutt-hardenedbsd>
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Hi! Is this with latest 11-CURRENT or 10-STABLE? Or contains the ad578c311ef commit? On Tuesday, December 15, 2015, Shawn Webb <shawn.webb@hardenedbsd.org> wrote: > On Tue, Dec 15, 2015 at 05:42:38PM +0100, Fabian Keil wrote: > > I've seen the following panic a couple of times in the last three > > months, usually while poudriere was running and with sh being the > > current process. > > > > This one is from a system based on r290926 running with > > kern.randompid=9001 and forking frequently (>1000 forks/second) > > due to poudriere and afl-fuzz: > > > > Fatal trap 12: page fault while in kernel mode > > cpuid = 1; apic id = 04 > > fault virtual address = 0x618b00a8 > > fault code = supervisor read data, page not present > > instruction pointer = 0x20:0xffffffff80909158 > > stack pointer = 0x28:0xfffffe011e03b940 > > frame pointer = 0x28:0xfffffe011e03b960 > > code segment = base 0x0, limit 0xfffff, type 0x1b > > = DPL 0, pres 1, long 1, def32 0, gran 1 > > processor eflags = interrupt enabled, resume, IOPL = 0 > > current process = 71325 (sh) > > trap number = 12 > > panic: page fault > > cpuid = 1 > > KDB: stack backtrace: > > [...] > > Uptime: 13d20h43m20s > > [...] > > Hey Fabien, > > I'm glad you've seen this, too. We've observed this in HardenedBSD, > especially when running Poudriere and Jenkins. I think Oliver Pinter > might have a potential patch to fix this. I've CC'd him on this thread. > > Thanks, > > -- > Shawn Webb > HardenedBSD > > GPG Key ID: 0x6A84658F52456EEE > GPG Key Fingerprint: 2ABA B6BD EF6A F486 BE89 3D9E 6A84 658F 5245 6EEE >
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