From nobody Mon Mar 23 03:53:51 2026 X-Original-To: current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4ffK6H5ndlz6WWx0 for ; Mon, 23 Mar 2026 03:53:59 +0000 (UTC) (envelope-from bzeeb-lists@lists.zabbadoz.net) Received: from mx-01.divo.sbone.de (mx-01.divo.sbone.de [IPv6:2003:a:140a:2200:6:594:fffe:19]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature ECDSA (prime256v1) client-digest SHA256) (Client CN "mx-01.divo.sbone.de", Issuer "E7" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4ffK6G6qmqz3Cjc for ; Mon, 23 Mar 2026 03:53:58 +0000 (UTC) (envelope-from bzeeb-lists@lists.zabbadoz.net) Authentication-Results: mx1.freebsd.org; dkim=pass header.d=zabbadoz.net header.s=20240622 header.b=d4L4IEsa; dmarc=pass (policy=none) header.from=zabbadoz.net; spf=pass (mx1.freebsd.org: domain of bzeeb-lists@lists.zabbadoz.net designates 2003:a:140a:2200:6:594:fffe:19 as permitted sender) smtp.mailfrom=bzeeb-lists@lists.zabbadoz.net Received: from mail.sbone.de (mail.sbone.de [IPv6:fde9:577b:c1a9:4902:0:7404:2:1025]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by mx-01.divo.sbone.de (Postfix) with ESMTPS id 12456A64805 for ; Mon, 23 Mar 2026 03:53:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=zabbadoz.net; s=20240622; t=1774238012; bh=ilP38VYc6UAgm+E/HTEenpXHk008yg32SSPaqLUoUEw=; h=Date:From:To:Subject; b=d4L4IEsa2SeH2++Uw4r3HA3tpVELXvIaoGn+giXzV4w4tAIJa5z2QHKRnFrjyI/qB 9Xc8xMIjL7po3nyYotYP080/EIIUsJRr9ALqxivJqIThV7CUfUO0JS9HCEs+c3Tdcc czNsXjeqsVHqj6PrKAPrHsp3c2AeAFDL32TbDaAPabNyglFyosQPfMUuIx8BOU/zkL byT6FrTe4mOCzVx7UqBBbhRkDrwM1nmAxdRNbHIe/DXMTv2gAoYHfnN0HNDclC1gT4 dQLjljJfRLyJ7X3R95EXpeGJhKLITjYDB1zxboYkzdVCWBDKc/xPMdxzVf9FTsj+yy RDPctPMtl8IcPiLsMwGRhECcekQvqaidjmLay/P9dMyuAmV74Keg26bWqnnS+7vfJH 5+JSNrwaSUzA6DbNTzISK8ARuUV7bpA7S3L359EEswjONZs55cMu6fanvyUfaTXBV/ 6wwJtpMqnC4RlYNnH7MbDnrLX1v5XWkI9/Tn82JXwq3VGRSDpUT1hlXSJ9ddnVx1h/ G2eWkwgtPSTAAT6dXWslUkmmUFejCmSyvn1AjXmlrMzRQl8VLOuENsq8UXDavBPYvQ 7WzVKrvl+p71MF/bv9bzif4IuEtjBm8GYSwVktmL4FGF/EgIeEtRn9EW12ixFHe4hR 9zs9Ra/7IxYVIx0NzpCKOWsM= Received: from content-filter.t4-02.sbone.de (content-filter.t4-02.sbone.de [IPv6:fde9:577b:c1a9:4902:0:7404:2:2742]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.sbone.de (Postfix) with ESMTPS id 76B222D029E9 for ; Mon, 23 Mar 2026 03:53:52 +0000 (UTC) X-Virus-Scanned: amavisd-new at sbone.de Received: from mail.sbone.de ([IPv6:fde9:577b:c1a9:4902:0:7404:2:1025]) by content-filter.t4-02.sbone.de (content-filter.t4-02.sbone.de [IPv6:fde9:577b:c1a9:4902:0:7404:2:2742]) (amavisd-new, port 10024) with ESMTP id zqPO4ub4DYhu for ; Mon, 23 Mar 2026 03:53:51 +0000 (UTC) Received: from nv.t4-02.sbone.de (nv.t4-02.sbone.de [IPv6:fde9:577b:c1a9:4902:0:7404:2:22]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.sbone.de (Postfix) with ESMTPSA id 6FAA62D029D8 for ; Mon, 23 Mar 2026 03:53:51 +0000 (UTC) Date: Mon, 23 Mar 2026 03:53:51 +0000 (UTC) From: "Bjoern A. Zeeb" To: current@freebsd.org Subject: kern_sig.c pfault with non-sleepable locks held Message-ID: X-OpenPGP-Key-Id: 0x14003F198FEFA3E77207EE8D2B58B8F83CCF1842 List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset=US-ASCII X-Spamd-Result: default: False [-4.00 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-0.999]; DMARC_POLICY_ALLOW(-0.50)[zabbadoz.net,none]; R_DKIM_ALLOW(-0.20)[zabbadoz.net:s=20240622]; R_SPF_ALLOW(-0.20)[+ip6:2003:a:140a:2200:6:594:fffe:19:c]; MIME_GOOD(-0.10)[text/plain]; MISSING_XM_UA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:3320, ipnet:2003::/19, country:DE]; RCVD_COUNT_THREE(0.00)[4]; RCPT_COUNT_ONE(0.00)[1]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; MLMMJ_DEST(0.00)[current@freebsd.org]; TO_DN_NONE(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[current@freebsd.org]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_TLS_LAST(0.00)[]; DKIM_TRACE(0.00)[zabbadoz.net:+] X-Rspamd-Queue-Id: 4ffK6G6qmqz3Cjc X-Spamd-Bar: --- Hi, this is at main 8cc1c0f35ec8 . I'll update later and see if I can repro this. It's been a long time since I've seen something like this... I cannot help much more as bhyve stopped with a triple fault on this. Kernel page fault with the following non-sleepable locks held: exclusive sleep mutex sigacts (sigacts) r = 0 (0xfffff800370b1ca8) locked @ /sys/kern/kern_sig.c:311 exclusive sleep mutex process lock (process lock) r = 0 (0xfffffe00a3162bd8) locked @ /sys/kern/kern_sig.c:308 stack backtrace: #0 0xffffffff80c2e51c at witness_debugger+0x6c #1 0xffffffff80c2fe29 at witness_warn+0x4c9 #2 0xffffffff8109bcec at trap_pfault+0x8c #3 0xffffffff8106a6b8 at calltrap+0x8 #4 0xffffffff8106d6b7 at end_exceptions+0x167 #5 0xffffffff80bb896b at postsig+0x28b #6 0xffffffff80bbcdab at ast_sig+0x1bb #7 0xffffffff80c22d08 at ast_handler+0xe8 #8 0xffffffff80c22c10 at ast+0x20 #9 0xffffffff8106d1a6 at doreti_ast+0x1c Fatal trap 12: page fault while in kernel mode cpuid = 3; apic id = 03 fault virtual address = 0xfffffe00b0aa9000 fault code = supervisor read data, page not present instruction pointer = 0x20:0xffffffff810979d5 stack pointer = 0:0xfffffe00b0aa88f0 frame pointer = 0:0xfffffe00b0aa88f0 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 = 2326 (iperf3) rdi: fffffe00b0aa8a38 rsi: fffffe00b0aa9000 rdx: 000000000000003b rcx: 0000000000000010 r8: fffffffffffffa38 r9: fffffe00b0aa8950 rax: fffffe00b0aa8978 rbx: fffffe00b0aa8f40 rbp: fffffe00b0aa88f0 r10: 0000000000000000 r11: fffffe00b0aa8d78 r12: 0000000000000000 r13: fffffe00b0aa8de8 r14: 0000000000000004 r15: fffff800047ef780 trap number = 12 Fatal trap 9: general protection fault while in kernel mode Fatal trap 9: general protection fault while in kernel mode (gdb) l *0xffffffff810979d5 0xffffffff810979d5 is at /sys/amd64/amd64/support.S:537. 532 ENTRY(memmove_std) 533 MEMMOVE erms=0 overlap=1 begin=MEMMOVE_BEGIN end=MEMMOVE_END 534 END(memmove_std) 535 536 ENTRY(memmove_erms) 537 MEMMOVE erms=1 overlap=1 begin=MEMMOVE_BEGIN end=MEMMOVE_END 538 END(memmove_erms) 539 540 /* 541 * memcpy(dst, src, len) -- Bjoern A. Zeeb r15:7