From owner-freebsd-hackers@freebsd.org Thu May 7 07:46:40 2020 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id BCF3913ACA6 for ; Thu, 7 May 2020 07:46:40 +0000 (UTC) (envelope-from marklmi@yahoo.com) Received: from sonic315-8.consmr.mail.gq1.yahoo.com (sonic315-8.consmr.mail.gq1.yahoo.com [98.137.65.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 49HlsC2BLqz3FJP for ; Thu, 7 May 2020 07:46:39 +0000 (UTC) (envelope-from marklmi@yahoo.com) X-YMail-OSG: OPNsNFcVM1lg_qAnMTDQTK3p6D7_v8d4a1hkBTBFATb9D8EdW0fAtSiyXqJ_CmM cC.GFKzJu6vWWOjImpl4nGd10z5jcwXRE4L_Zr3b.DPcoxvN6IhM_G._7lnBVJjz9648dLc9jexF 88y8_cXMAv5Hzl3H3sk14v8aqNLLWqPcjXLWmL_sWASxHG4ypnCqrDY8f9ErNDPy8rMrXjYFm.oV zXp1g3oynvSj3CPH5lvDZSbW_FHh_u5SSBuZAwBwEJPOZKXJ5n6d7fWQnWds0zoPMhLx37njt4RB 2tylxDS5OVSvqRO.LFRvLdQFynLF7QyAfwfpcidUu0Eu9WQkqdsrcFB7VjEeB_.xFFVkjwe.USmE flW3X0xWiZtx9qIUdwx7br59WvcMQzmeg_cWGFm_Y68hz6scsIONmz5l5LuvvYoCi65qNuB3PkQ4 ZxJP0quX2TFsJ7EYkvOSBrVISRtgGRj4yyV_7CIVm7doZz14jL1K04qtx22O26ym4aHszXrgNXVI C9Khdn6yqiWdJFIIjV6Ftz5PpuM_D8KaMqQSHKtDeD1Fd6fbQJXb.YMLHyjFvHEYVvNKMXfhamFM rEUizUep4d4jwJemX6RVG1C1SCbdO3VQlkq3Ege.fTMTHhrbmlEBCWXLJQQ6vQ1_AkheZFBKl5Ja QTVSXsuCnRIgrf4Sfj.pb5UDAjIlHLx2hpVQo.H.xFz3CpHrQU.46Oog8HYvLCZW.qlacrf3V.3P 9fWbk5tD5wYtkkIhtTcMt05EZGZOUyafwcOZnqsT7KsYbvk_lTTJsA5.AOpU7LykWndBZ2iw_YBZ 7Zx7b8c8Hlmdh0Xk0iTih77k2jSBxhDtFptkEGRzzAnx9FbN1TjURg24VkSnHmjFuYaK6kugFAr7 aln_UFbHTq3Z1JzdzISv3qZDhAzS8WCQmau2ctWHqezQvvKcXeOMDsRaYanFPtCYClbeUNd7MBgx 7jurHTue0kNeQl5nCWrUkNFemFYCXwL8jGGg06parSo9RXv2cYNafsr7FXBr1L3L9Dv6rECpnhU7 nWdtoPD6ayz6WNkjXadg0Pa9.dkTj7WPeguLP_X04u3ne1Epb.aH3bM6nmu8XhyVi0uBNMdocGW2 Qc_Ew2E6OQacImCkp8xkF4HtOmqhEwRWoyI7IGBz6vaRQBwtH5MnK3a1u3Sl0kQFew9qCBeQQTC9 QURNKJRimayT2l55hHSo32SmQ1PKeNDunnJ2s_dGsgPM.3WGHWw8P5fTftVy4aUP61vaVjKZkxnV wOPcZwnnyaqFpUt52YMNRy_r3WCIXGXmdywPo5HqjeESQSKOrZJl4wtI8SCgTC7C31F58Si.Y4Hi KV8U06tHi8ewwIHnLchtdcpMxYLBdZ3_EcO5IKJYqubtNJuvwUQfLxEA2n3cQM33BgnZ_dVYCGvA MFCn73Vdfk6ZK9f5X.lo- Received: from sonic.gate.mail.ne1.yahoo.com by sonic315.consmr.mail.gq1.yahoo.com with HTTP; Thu, 7 May 2020 07:46:37 +0000 Received: by smtp403.mail.bf1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 2d65ee9bbf6f83b7a0d0434cbd6c20e4; Thu, 07 May 2020 07:46:32 +0000 (UTC) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.80.23.2.2\)) Subject: Re: svn commit: r360233 - in head: contrib/jemalloc . . . : This partially breaks a 2-socket 32-bit powerpc (old PowerMac G4) based on head -r360311 From: Mark Millard In-Reply-To: <8AAB0462-3FA8-490C-8D8D-7C15B1C9E2DE@yahoo.com> Date: Thu, 7 May 2020 00:46:30 -0700 Cc: Brandon Bergren , Justin Hibbits Content-Transfer-Encoding: quoted-printable Message-Id: <18E62746-80DB-4195-977D-4FF32D0129EE@yahoo.com> References: <8479DD58-44F6-446A-9CA5-D01F0F7C1B38@yahoo.com> <17ACDA02-D7EF-4F26-874A-BB3E935CD072@yahoo.com> <695E6836-F860-4557-B7DE-CC1EDB347F18@yahoo.com> <121B9B09-141B-4DC3-918B-1E7CFB99E779@yahoo.com> <8AAB0462-3FA8-490C-8D8D-7C15B1C9E2DE@yahoo.com> To: "vangyzen@freebsd.org" , svn-src-head@freebsd.org, FreeBSD Current , FreeBSD Hackers , FreeBSD PowerPC ML X-Mailer: Apple Mail (2.3608.80.23.2.2) X-Rspamd-Queue-Id: 49HlsC2BLqz3FJP X-Spamd-Bar: -- X-Spamd-Result: default: False [-2.15 / 15.00]; TO_DN_EQ_ADDR_SOME(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ptr:yahoo.com]; FREEMAIL_FROM(0.00)[yahoo.com]; MV_CASE(0.50)[]; DKIM_TRACE(0.00)[yahoo.com:+]; DMARC_POLICY_ALLOW(-0.50)[yahoo.com,reject]; RCPT_COUNT_SEVEN(0.00)[7]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; FREEMAIL_ENVFROM(0.00)[yahoo.com]; ASN(0.00)[asn:36647, ipnet:98.137.64.0/21, country:US]; MID_RHS_MATCH_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[yahoo.com.dwl.dnswl.org : 127.0.5.0]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.72)[-0.716,0]; R_DKIM_ALLOW(-0.20)[yahoo.com:s=s2048]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-0.93)[-0.929,0]; MIME_GOOD(-0.10)[text/plain]; IP_SCORE(0.00)[ip: (4.75), ipnet: 98.137.64.0/21(0.83), asn: 36647(0.66), country: US(-0.05)]; IP_SCORE_FREEMAIL(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[32.65.137.98.list.dnswl.org : 127.0.5.0]; RWL_MAILSPIKE_POSSIBLE(0.00)[32.65.137.98.rep.mailspike.net : 127.0.0.17]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 May 2020 07:46:40 -0000 [__je_sz_size2index_tab seems messed up in 2 of the asserting contexts: first 384 are zero in both. More before that is also messed up (all zero). I show the details later below.] On 2020-May-6, at 16:57, Mark Millard wrote: > [This explores process crashes that happen during system > shutdown, in a context not having MALLOC_PRODUCTION=3D . > So assert failures are reported as the stopping points.] >=20 > It looks like shutdown -p now, shutdown -r now, and the > like can lead some processes to assert during their exit > attempt, including a sshd failure (that I've not seen > before), rpcbind, and nfsd. I show information about the > observed asserts for those below. >=20 >=20 > sshd hit an assert, failing slab =3D=3D extent_slab_get(extent) : >=20 > (gdb) bt=20 > #0 thr_kill () at thr_kill.S:4 > #1 0x50927170 in __raise (s=3D6) at /usr/src/lib/libc/gen/raise.c:52 > #2 0x50886cc0 in abort () at /usr/src/lib/libc/stdlib/abort.c:67 > #3 0x508834b0 in arena_dalloc (tsdn=3D, ptr=3D, tcache=3D, alloc_ctx=3D, = slow_path=3D) > at = /usr/src/contrib/jemalloc/include/jemalloc/internal/arena_inlines_b.h:315 > #4 idalloctm (tsdn=3D0x500dd040, ptr=3D0x5008a180, tcache=3D0x500dd160,= alloc_ctx=3D, is_internal=3D, = slow_path=3D) > at = /usr/src/contrib/jemalloc/include/jemalloc/internal/jemalloc_internal_inli= nes_c.h:118 > #5 0x5087b0a4 in ifree (tsd=3D0x500dd040, ptr=3D0x5008a180, = tcache=3D0x500dd160, slow_path=3D) at = jemalloc_jemalloc.c:2590 > #6 0x5087acac in __je_free_default (ptr=3D0x5008a180) at = jemalloc_jemalloc.c:2784 > #7 0x5087b294 in __free (ptr=3D0x5008a180) at = jemalloc_jemalloc.c:2852 > #8 0x10029464 in server_accept_loop (config_s=3D, = sock_in=3D, sock_out=3D, = newsock=3D) at /usr/src/crypto/openssh/sshd.c:1185 > #9 main (ac=3D, av=3D0xffffde3c) at = /usr/src/crypto/openssh/sshd.c:2009 >=20 > . . . > (gdb) up > #2 0x50886cc0 in abort () at /usr/src/lib/libc/stdlib/abort.c:67 > 67 (void)raise(SIGABRT); > (gdb) up > #3 0x508834b0 in arena_dalloc (tsdn=3D, ptr=3D, tcache=3D, alloc_ctx=3D, = slow_path=3D) > at = /usr/src/contrib/jemalloc/include/jemalloc/internal/arena_inlines_b.h:315 > 315 assert(slab =3D=3D extent_slab_get(extent)); >=20 > (gdb) list > 310 rtree_ctx =3D tsd_rtree_ctx(tsdn_tsd(tsdn)); > 311 extent_t *extent =3D rtree_extent_read(tsdn, = &extents_rtree, > 312 rtree_ctx, (uintptr_t)ptr, true); > 313 assert(szind =3D=3D extent_szind_get(extent)); > 314 assert(szind < SC_NSIZES); > 315 assert(slab =3D=3D extent_slab_get(extent)); > 316 } > 317=09 > 318 if (likely(slab)) { > 319 /* Small allocation. */ >=20 > More fully: >=20 > 285 JEMALLOC_ALWAYS_INLINE void > 286 arena_dalloc(tsdn_t *tsdn, void *ptr, tcache_t *tcache, > 287 alloc_ctx_t *alloc_ctx, bool slow_path) { > 288 assert(!tsdn_null(tsdn) || tcache =3D=3D NULL); > 289 assert(ptr !=3D NULL); > 290=09 > 291 if (unlikely(tcache =3D=3D NULL)) { > 292 arena_dalloc_no_tcache(tsdn, ptr); > 293 return; > 294 } > 295=09 > 296 szind_t szind; > 297 bool slab; > 298 rtree_ctx_t *rtree_ctx; > 299 if (alloc_ctx !=3D NULL) { > 300 szind =3D alloc_ctx->szind; > 301 slab =3D alloc_ctx->slab; > 302 assert(szind !=3D SC_NSIZES); > 303 } else { > 304 rtree_ctx =3D tsd_rtree_ctx(tsdn_tsd(tsdn)); > 305 rtree_szind_slab_read(tsdn, &extents_rtree, = rtree_ctx, > 306 (uintptr_t)ptr, true, &szind, &slab); > 307 } > 308=09 > 309 if (config_debug) { > 310 rtree_ctx =3D tsd_rtree_ctx(tsdn_tsd(tsdn)); > 311 extent_t *extent =3D rtree_extent_read(tsdn, = &extents_rtree, > 312 rtree_ctx, (uintptr_t)ptr, true); > 313 assert(szind =3D=3D extent_szind_get(extent)); > 314 assert(szind < SC_NSIZES); > 315 assert(slab =3D=3D extent_slab_get(extent)); > 316 } > 317=09 > 318 if (likely(slab)) { > 319 /* Small allocation. */ > 320 tcache_dalloc_small(tsdn_tsd(tsdn), tcache, ptr, = szind, > 321 slow_path); > 322 } else { > 323 arena_dalloc_large(tsdn, ptr, tcache, szind, = slow_path); > 324 } > 325 } The following are only shown for contrast with the later cases of lots of zeros showing up where below shows non-zero values (taken from sshd.core, which failed differently): (gdb) x/4x __je_arenas+16368/4 0x50981ab0 <__je_arenas+16368>: 0x00000000 0x00000000 = 0x00000000 0x00000009 (gdb) print/x __je_arenas_lock=20 $1 =3D {{{prof_data =3D {tot_wait_time =3D {ns =3D 0x0}, max_wait_time =3D= {ns =3D 0x0}, n_wait_times =3D 0x0, n_spin_acquired =3D 0x0, max_n_thds = =3D 0x0, n_waiting_thds =3D {repr =3D 0x0}, n_owner_switches =3D 0x0,=20 prev_owner =3D 0x0, n_lock_ops =3D 0x0}, lock =3D 0x5008bf00, = postponed_next =3D 0x50974070, locked =3D {repr =3D 0x0}}}, witness =3D = {name =3D 0x50760b04, rank =3D 0x3, comp =3D 0x0, opaque =3D 0x0, link =3D= { qre_next =3D 0x50981b10, qre_prev =3D 0x50981b10}}, lock_order =3D = 0x0} (gdb) print/x __je_narenas_auto $2 =3D 0x8 (gdb) print/x malloc_conf $3 =3D 0x0 (gdb) print/x __je_ncpus $4 =3D 0x2 (gdb) print/x __je_manual_arena_base $5 =3D 0x9 (gdb) print/x __je_sz_pind2sz_tab=20 $6 =3D {0x1000, 0x2000, 0x3000, 0x4000, 0x5000, 0x6000, 0x7000, 0x8000, = 0xa000, 0xc000, 0xe000, 0x10000, 0x14000, 0x18000, 0x1c000, 0x20000, = 0x28000, 0x30000, 0x38000, 0x40000, 0x50000, 0x60000,=20 0x70000, 0x80000, 0xa0000, 0xc0000, 0xe0000, 0x100000, 0x140000, = 0x180000, 0x1c0000, 0x200000, 0x280000, 0x300000, 0x380000, 0x400000, = 0x500000, 0x600000, 0x700000, 0x800000, 0xa00000, 0xc00000,=20 0xe00000, 0x1000000, 0x1400000, 0x1800000, 0x1c00000, 0x2000000, = 0x2800000, 0x3000000, 0x3800000, 0x4000000, 0x5000000, 0x6000000, = 0x7000000, 0x8000000, 0xa000000, 0xc000000, 0xe000000,=20 0x10000000, 0x14000000, 0x18000000, 0x1c000000, 0x20000000, = 0x28000000, 0x30000000, 0x38000000, 0x40000000, 0x50000000, 0x60000000, = 0x70000000, 0x70001000} (gdb) print/x __je_sz_index2size_tab $7 =3D {0x8, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70, 0x80, 0xa0, 0xc0, = 0xe0, 0x100, 0x140, 0x180, 0x1c0, 0x200, 0x280, 0x300, 0x380, 0x400, = 0x500, 0x600, 0x700, 0x800, 0xa00, 0xc00, 0xe00, 0x1000,=20 0x1400, 0x1800, 0x1c00, 0x2000, 0x2800, 0x3000, 0x3800, 0x4000, = 0x5000, 0x6000, 0x7000, 0x8000, 0xa000, 0xc000, 0xe000, 0x10000, = 0x14000, 0x18000, 0x1c000, 0x20000, 0x28000, 0x30000, 0x38000,=20 0x40000, 0x50000, 0x60000, 0x70000, 0x80000, 0xa0000, 0xc0000, = 0xe0000, 0x100000, 0x140000, 0x180000, 0x1c0000, 0x200000, 0x280000, = 0x300000, 0x380000, 0x400000, 0x500000, 0x600000, 0x700000,=20 0x800000, 0xa00000, 0xc00000, 0xe00000, 0x1000000, 0x1400000, = 0x1800000, 0x1c00000, 0x2000000, 0x2800000, 0x3000000, 0x3800000, = 0x4000000, 0x5000000, 0x6000000, 0x7000000, 0x8000000, 0xa000000,=20 0xc000000, 0xe000000, 0x10000000, 0x14000000, 0x18000000, 0x1c000000, = 0x20000000, 0x28000000, 0x30000000, 0x38000000, 0x40000000, 0x50000000, = 0x60000000, 0x70000000} (gdb) print/x __je_sz_size2index_tab $2 =3D {0x0, 0x0, 0x1, 0x2, 0x2, 0x3, 0x3, 0x4, 0x4, 0x5, 0x5, 0x6, 0x6, = 0x7, 0x7, 0x8, 0x8, 0x9, 0x9, 0x9, 0x9, 0xa, 0xa, 0xa, 0xa, 0xb, 0xb, = 0xb, 0xb, 0xc, 0xc, 0xc, 0xc, 0xd, 0xd, 0xd, 0xd, 0xd,=20 0xd, 0xd, 0xd, 0xe, 0xe, 0xe, 0xe, 0xe, 0xe, 0xe, 0xe, 0xf, 0xf, 0xf, = 0xf, 0xf, 0xf, 0xf, 0xf, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, = 0x11 , 0x12 ,=20 0x13 , 0x14 , 0x15 , 0x16 , 0x17 , 0x18 , 0x19 ,=20 0x1a , 0x1b , 0x1c } > rpcbind hit an assert, failing ret =3D=3D sz_size2index_compute(size) = : >=20 > (gdb) bt > #0 thr_kill () at thr_kill.S:4 > #1 0x502f2170 in __raise (s=3D6) at /usr/src/lib/libc/gen/raise.c:52 > #2 0x50251d04 in abort () at /usr/src/lib/libc/stdlib/abort.c:79 > #3 0x5024f260 in sz_size2index_lookup (size=3D) at = /usr/src/contrib/jemalloc/include/jemalloc/internal/sz.h:159 > #4 sz_size2index (size=3D) at = /usr/src/contrib/jemalloc/include/jemalloc/internal/sz.h:166 > #5 imalloc_body (sopts=3D0xffffb360, dopts=3D0xffffb340, = tsd=3D0x5009a018) at jemalloc_jemalloc.c:2066 > #6 0x50244874 in imalloc (sopts=3D0xffffb360, dopts=3D0xffffb340) at = /usr/src/contrib/jemalloc/include/jemalloc/internal/tsd.h:331 > #7 0x50244fe8 in __calloc (num=3D1, size=3D96) at = jemalloc_jemalloc.c:2498 > #8 0x50265690 in svc_xprt_alloc () at /usr/src/lib/libc/rpc/svc.c:541 > #9 0x502635f4 in makefd_xprt (fd=3D14, sendsize=3D9000, = recvsize=3D9000) at /usr/src/lib/libc/rpc/svc_vc.c:250 > #10 0x502644b4 in rendezvous_request (xprt=3D0x5004c000, = msg=3D) at /usr/src/lib/libc/rpc/svc_vc.c:315 > #11 0x50265a98 in svc_getreq_common (fd=3D) at = /usr/src/lib/libc/rpc/svc.c:640 > #12 0x50265d1c in svc_getreq_poll (pfdp=3D, = pollretval=3D1) at /usr/src/lib/libc/rpc/svc.c:739 > #13 0x10018568 in my_svc_run () at = /usr/src/usr.sbin/rpcbind/rpcb_svc_com.c:1167 > #14 0x10014ad8 in main (argc=3D, argv=3D) at /usr/src/usr.sbin/rpcbind/rpcbind.c:250 > (gdb) up 3 > #3 0x5024f260 in sz_size2index_lookup (size=3D) at = /usr/src/contrib/jemalloc/include/jemalloc/internal/sz.h:159 > 159 assert(ret =3D=3D sz_size2index_compute(size)); > (gdb) print ret > $1 =3D 0 >=20 > 154 JEMALLOC_ALWAYS_INLINE szind_t > 155 sz_size2index_lookup(size_t size) { > 156 assert(size <=3D SC_LOOKUP_MAXCLASS); > 157 szind_t ret =3D (sz_size2index_tab[(size + (ZU(1) << = SC_LG_TINY_MIN) - 1) > 158 >> SC_LG_TINY_MIN]); > 159 assert(ret =3D=3D sz_size2index_compute(size)); > 160 return ret; > 161 } gdb reports for sz_size2index_tab (really JEMALLOC_N(sz_size2index_tab), i.e., __je_sz_size2index_tab): (gdb) print/x __je_sz_size2index_tab $1 =3D {0x0 , 0x1a, 0x1b , 0x1c = } Also: (gdb) x/4x __je_arenas+16368/4 0x5034cab0 <__je_arenas+16368>: 0x00000000 0x00000000 = 0x00000000 0x00000000 (gdb) print/x __je_arenas_lock = =20 $8 =3D {{{prof_data =3D {tot_wait_time =3D {ns =3D 0x0}, max_wait_time =3D= {ns =3D 0x0}, n_wait_times =3D 0x0, n_spin_acquired =3D 0x0, max_n_thds = =3D 0x0, n_waiting_thds =3D {repr =3D 0x0}, n_owner_switches =3D 0x0,=20 prev_owner =3D 0x0, n_lock_ops =3D 0x0}, lock =3D 0x0, = postponed_next =3D 0x0, locked =3D {repr =3D 0x0}}}, witness =3D {name =3D= 0x0, rank =3D 0x0, comp =3D 0x0, opaque =3D 0x0, link =3D {qre_next =3D = 0x0,=20 qre_prev =3D 0x0}}, lock_order =3D 0x0} (gdb) print/x __je_narenas_auto $9 =3D 0x0 (gdb) print/x malloc_conf =20 $10 =3D 0x0 (gdb) print/x __je_ncpus=20 $11 =3D 0x0 (gdb) print/x __je_manual_arena_base $12 =3D 0x0 (gdb) print/x __je_sz_pind2sz_tab =20 $13 =3D {0x0 } (gdb) print/x __je_sz_index2size_tab $14 =3D {0x0 } > nfsd hit an assert, failing ret =3D=3D sz_size2index_compute(size) [Correction: That should have referenced sz_index2size_lookup(index).] > (also, but a different caller of sz_size2index): [Correction: The "also" comment should be ignored: sz_index2size_lookup(index) is referenced below.] >=20 > (gdb) bt > #0 thr_kill () at thr_kill.S:4 > #1 0x502b2170 in __raise (s=3D6) at /usr/src/lib/libc/gen/raise.c:52 > #2 0x50211cc0 in abort () at /usr/src/lib/libc/stdlib/abort.c:67 > #3 0x50206104 in sz_index2size_lookup (index=3D) at = /usr/src/contrib/jemalloc/include/jemalloc/internal/sz.h:200 > #4 sz_index2size (index=3D) at = /usr/src/contrib/jemalloc/include/jemalloc/internal/sz.h:207 > #5 ifree (tsd=3D0x50094018, ptr=3D0x50041028, tcache=3D0x50094138, = slow_path=3D) at jemalloc_jemalloc.c:2583 > #6 0x50205cac in __je_free_default (ptr=3D0x50041028) at = jemalloc_jemalloc.c:2784 > #7 0x50206294 in __free (ptr=3D0x50041028) at = jemalloc_jemalloc.c:2852 > #8 0x50287ec8 in ns_src_free (src=3D0x50329004, = srclistsize=3D) at /usr/src/lib/libc/net/nsdispatch.c:452 > #9 ns_dbt_free (dbt=3D0x50329000) at = /usr/src/lib/libc/net/nsdispatch.c:436 > #10 vector_free (vec=3D0x50329000, count=3D, esize=3D12, = free_elem=3D) at /usr/src/lib/libc/net/nsdispatch.c:253 > #11 nss_atexit () at /usr/src/lib/libc/net/nsdispatch.c:578 > #12 0x5028d958 in __cxa_finalize (dso=3D0x0) at = /usr/src/lib/libc/stdlib/atexit.c:240 > #13 0x502117f8 in exit (status=3D0) at = /usr/src/lib/libc/stdlib/exit.c:74 > #14 0x10013f9c in child_cleanup (signo=3D) at = /usr/src/usr.sbin/nfsd/nfsd.c:969 > #15 > #16 0x00000000 in ?? () >=20 > (gdb) up 3 > #3 0x50206104 in sz_index2size_lookup (index=3D) at = /usr/src/contrib/jemalloc/include/jemalloc/internal/sz.h:200 > 200 assert(ret =3D=3D sz_index2size_compute(index)); >=20 > (ret is optimized out.) >=20 > 197 JEMALLOC_ALWAYS_INLINE size_t > 198 sz_index2size_lookup(szind_t index) { > 199 size_t ret =3D (size_t)sz_index2size_tab[index]; > 200 assert(ret =3D=3D sz_index2size_compute(index)); > 201 return ret; > 202 } (gdb) print/x __je_sz_index2size_tab $3 =3D {0x0 } Also: (gdb) x/4x __je_arenas+16368/4 0x5030cab0 <__je_arenas+16368>: 0x00000000 0x00000000 = 0x00000000 0x00000000 (gdb) print/x __je_arenas_lock = =20 $8 =3D {{{prof_data =3D {tot_wait_time =3D {ns =3D 0x0}, max_wait_time =3D= {ns =3D 0x0}, n_wait_times =3D 0x0, n_spin_acquired =3D 0x0, max_n_thds = =3D 0x0, n_waiting_thds =3D {repr =3D 0x0}, n_owner_switches =3D 0x0,=20 prev_owner =3D 0x0, n_lock_ops =3D 0x0}, lock =3D 0x0, = postponed_next =3D 0x0, locked =3D {repr =3D 0x0}}}, witness =3D {name =3D= 0x0, rank =3D 0x0, comp =3D 0x0, opaque =3D 0x0, link =3D {qre_next =3D = 0x0,=20 qre_prev =3D 0x0}}, lock_order =3D 0x0} (gdb) print/x __je_narenas_auto $9 =3D 0x0 (gdb) print/x malloc_conf =20 $10 =3D 0x0 (gdb) print/x __je_ncpus=20 $11 =3D 0x0 (gdb) print/x __je_manual_arena_base $12 =3D 0x0 (gdb) print/x __je_sz_pind2sz_tab =20 $13 =3D {0x0 } (gdb) print/x __je_sz_size2index_tab $1 =3D {0x0 , 0x1a, 0x1b , 0x1c = } > Booting and immediately trying something like: >=20 > service nfsd stop >=20 > did not lead to a failure. But may be after > a while it would and be less drastic than a > reboot or power down. More detail: So, for rpcbind and nfds at some point a large part of __je_sz_size2index_tab is being stomped on, as is all of __je_sz_index2size_tab and more. For rpcbind, the following area is zero but in a live process is not all-zero (I show the partially non-zero live-process context instead of the all-zero .core file content): 0x5034cab0 <__je_arenas+16368>: 0x00000000 0x00000000 = 0x00000000 0x00000009 0x5034cac0 <__je_arenas_lock>: 0x00000000 0x00000000 = 0x00000000 0x00000000 0x5034cad0 <__je_arenas_lock+16>: 0x00000000 0x00000000 = 0x00000000 0x00000000 0x5034cae0 <__je_arenas_lock+32>: 0x00000000 0x00000000 = 0x00000000 0x00000000 0x5034caf0 <__je_arenas_lock+48>: 0x00000000 0x00000000 = 0x00000000 0x00000000 0x5034cb00 <__je_arenas_lock+64>: 0x00000000 0x5033f070 = 0x00000000 0x00000000 0x5034cb10 <__je_arenas_lock+80>: 0x5012bb04 0x00000003 = 0x00000000 0x00000000 0x5034cb20 <__je_arenas_lock+96>: 0x5034cb10 0x5034cb10 = 0x00000000 0x00000000 Then the memory in the crash continues to be zero until: 0x5034d000 <__je_sz_size2index_tab+384>: 0x1a1b1b1b = 0x1b1b1b1b 0x1b1b1b1b 0x1b1b1b1b Notice the interesting page boundary for where non-zero is first available again! Between __je_arenas_lock and __je_sz_size2index_tab are: 0x5034cb30 __je_narenas_auto 0x5034cb38 malloc_conf 0x5034cb3c __je_ncpus 0x5034cb40 __je_manual_arena_base 0x5034cb80 __je_sz_pind2sz_tab 0x5034ccc0 __je_sz_index2size_tab 0x5034ce80 __je_sz_size2index_tab For nfsd, it is similar (again showing the partially non-zero live process context instead of the all-zeros from the .core file): 0x5030cab0 <__je_arenas+16368>: 0x00000000 0x00000000 = 0x00000000 0x00000009 0x5030cac0 <__je_arenas_lock>: 0x00000000 0x00000000 = 0x00000000 0x00000000 0x5030cad0 <__je_arenas_lock+16>: 0x00000000 0x00000000 = 0x00000000 0x00000000 0x5030cae0 <__je_arenas_lock+32>: 0x00000000 0x00000000 = 0x00000000 0x00000000 0x5030caf0 <__je_arenas_lock+48>: 0x00000000 0x00000000 = 0x00000000 0x00000000 0x5030cb00 <__je_arenas_lock+64>: 0x00000000 0x502ff070 = 0x00000000 0x00000000 0x5030cb10 <__je_arenas_lock+80>: 0x500ebb04 0x00000003 = 0x00000000 0x00000000 0x5030cb20 <__je_arenas_lock+96>: 0x5030cb10 0x5030cb10 = 0x00000000 0x00000000 Then the memory in the crash continues to be zero until: 0x5030d000 <__je_sz_size2index_tab+384>: 0x1a1b1b1b = 0x1b1b1b1b 0x1b1b1b1b 0x1b1b1b1b Notice the interesting page boundary for where non-zero is first available again! Between __je_arenas_lock and __je_sz_size2index_tab are: 0x5030cb30 __je_narenas_auto 0x5030cb38 malloc_conf 0x5030cb3c __je_ncpus 0x5030cb40 __je_manual_arena_base 0x5030cb80 __je_sz_pind2sz_tab 0x5030ccc0 __je_sz_index2size_tab 0x5030ce80 __je_sz_size2index_tab Note: because __je_arenas is normally mostly zero for these contexts, I can not tell where the memory trashing started, only where it replaced non-zero values with zeros. =3D=3D=3D Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)