Date: Tue, 20 Nov 2018 20:24:26 +0000 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)) Message-ID: <bug-233277-3630-0UuHlWYFnI@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-233277-3630@https.bugs.freebsd.org/bugzilla/> References: <bug-233277-3630@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D233277 --- Comment #3 from Alexander Motin <mav@FreeBSD.org> --- 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.=
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