From owner-freebsd-fs@freebsd.org Tue Nov 20 20:24:28 2018 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 4845C113CA9E for ; Tue, 20 Nov 2018 20:24:28 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id D4A9F81419 for ; Tue, 20 Nov 2018 20:24:27 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 9709E113CA9D; Tue, 20 Nov 2018 20:24:27 +0000 (UTC) Delivered-To: fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 718B7113CA9C for ; Tue, 20 Nov 2018 20:24:27 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0C8B581414 for ; Tue, 20 Nov 2018 20:24:27 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 3887D15DE0 for ; Tue, 20 Nov 2018 20:24:26 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id wAKKOQAB052752 for ; Tue, 20 Nov 2018 20:24:26 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id wAKKOQWp052751 for fs@FreeBSD.org; Tue, 20 Nov 2018 20:24:26 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 233277] Panic when receiving incremental ZFS send (solaris assert: db->db_buf == ((void *)0)) Date: Tue, 20 Nov 2018 20:24:26 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: mav@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: fs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-Rspamd-Queue-Id: D4A9F81419 X-Spamd-Result: default: False [0.37 / 15.00]; local_wl_from(0.00)[freebsd.org]; NEURAL_HAM_MEDIUM(-0.28)[-0.279,0]; ASN(0.00)[asn:10310, ipnet:2001:1900:2254::/48, country:US]; NEURAL_SPAM_SHORT(0.79)[0.786,0]; NEURAL_HAM_LONG(-0.14)[-0.138,0] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Nov 2018 20:24:28 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D233277 --- Comment #3 from Alexander Motin --- I've just reproduced it in clean environment. I suspect it is related to my recent patch fixing spill block loss on block size change (https://svnweb.freebsd.org/base?view=3Drevision&revision=3D340096). Here is the reproduction scenario: # zfs create ssd/zzz # dd if=3D/dev/zero of=3D/ssd/zzz/f bs=3D4k count=3D1 1+0 records in 1+0 records out 4096 bytes transferred in 0.001220 secs (3356604 bytes/sec) # dd if=3D/dev/random of=3D/ssd/zzz/f bs=3D4 count=3D1 conv=3Dnotrunc 1+0 records in 1+0 records out 4 bytes transferred in 0.002598 secs (1540 bytes/sec) # zfs snapshot ssd/zzz@a # zfs send -e ssd/zzz@a |zfs receive ssd/xxx # dd if=3D/dev/zero of=3D/ssd/zzz/f bs=3D16k count=3D1 conv=3Dnotrunc 1+0 records in 1+0 records out 16384 bytes transferred in 0.002887 secs (5674227 bytes/sec) # dd if=3D/dev/random of=3D/ssd/zzz/f bs=3D4 count=3D1 conv=3Dnotrunc 1+0 records in 1+0 records out 4 bytes transferred in 0.000199 secs (20141 bytes/sec) # zfs snapshot ssd/zzz@b # zfs send -e -i a ssd/zzz@b | zfs receive ssd/xxx panic: solaris assert: db->db_buf =3D=3D ((void *)0) (0xfffff80116233c00 = =3D=3D 0x0), file: /sources/FreeBSD/head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c, line: 1097 cpuid =3D 44 time =3D 1542744219 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe010bc1f= 800 vpanic() at vpanic+0x1a3/frame 0xfffffe010bc1f860 panic() at panic+0x43/frame 0xfffffe010bc1f8c0 assfail3() at assfail3+0x2c/frame 0xfffffe010bc1f8e0 dmu_buf_will_fill() at dmu_buf_will_fill+0x24b/frame 0xfffffe010bc1f920 dmu_buf_write_embedded() at dmu_buf_write_embedded+0xe0/frame 0xfffffe010bc1f970 dmu_write_embedded() at dmu_write_embedded+0xea/frame 0xfffffe010bc1f9d0 receive_writer_thread() at receive_writer_thread+0x513/frame 0xfffffe010bc1= fa70 fork_exit() at fork_exit+0x84/frame 0xfffffe010bc1fab0 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe010bc1fab0 --=20 You are receiving this mail because: You are the assignee for the bug.=