• Michał Kępień
    @michal started a thread
    Last updated by Michal Nowak
    • I am aware of the dnstap issue and I have an idea for a fix.

      As for verify, it looks weird, I do not think I have seen that failure mode yet. Does it fail reliably or intermittently?

    • It fails fairly reliably. I let it run in infinite loop and in ~15th iteration (in about 2 minutes) it fails like this:

      genzones.sh: line 67:   981 Bus error               (core dumped) $KEYGEN -a rsasha256 ${zone} > kg1.out$n 2>&1

      The core dump notice is not always visible in terminal, but coredumpctl(1) gathers them reliably, so I gathered 10 cores from bin/dnssec/dnssec-keygen and few from bin/dnssec/dnssec-signzone.

      dmesg:

      traps: dnssec-keygen[981] trap stack segment ip:7fb63473d335 sp:7ffdf49db438 error:0 in libcrypto.so.1.1.1c[7fb6346e7000+1a5000]

      Sometimes the test passed even though dnssec-keygen dumped core.

      Upon investigation the culprit seems to be deepen in the stack, likely in libcrypto.so.1.1 of openssl-1.1.1c-2.fc30.x86_64:

      (gdb) info threads
        Id   Target Id                       Frame 
      * 1    Thread 0x7fb63406a840 (LWP 981) bn_sqr8x_internal () at crypto/bn/x86_64-mont5.s:1759
      (gdb) bt
      #0  bn_sqr8x_internal () at crypto/bn/x86_64-mont5.s:1759
      #1  0x00007fb63473cce5 in bn_power5 () at crypto/bn/x86_64-mont5.s:1171
      #2  0x00007fb63472a871 in BN_mod_exp_mont_consttime (rr=rr@entry=0xff0790, a=<optimized out>, a@entry=0xff0790, p=p@entry=0xff0778, m=m@entry=0xff27c0, ctx=ctx@entry=0xff06e0, in_mont=in_mont@entry=0xfef0c0) at crypto/bn/bn_exp.c:1007
      #3  0x00007fb63472aa5b in BN_mod_exp_mont (rr=rr@entry=0xff0790, a=a@entry=0xff0790, p=p@entry=0xff0778, m=m@entry=0xff27c0, ctx=ctx@entry=0xff06e0, in_mont=in_mont@entry=0xfef0c0) at crypto/bn/bn_exp.c:310
      #4  0x00007fb634732596 in witness (mont=0xfef0c0, ctx=0xff06e0, k=4, a1_odd=0xff0778, a1=0xff0748, a=0xff27c0, w=0xff0790) at crypto/bn/bn_prime.c:248
      #5  BN_is_prime_fasttest_ex (cb=0xfeca70, do_trial_division=<optimized out>, ctx_passed=0xff06e0, checks=<optimized out>, a=0xff27c0) at crypto/bn/bn_prime.c:222
      #6  BN_is_prime_fasttest_ex (a=0xff27c0, checks=<optimized out>, ctx_passed=0xff06e0, do_trial_division=<optimized out>, cb=0xfeca70) at crypto/bn/bn_prime.c:150
      #7  0x00007fb634732c51 in BN_generate_prime_ex (ret=ret@entry=0xff27c0, bits=bits@entry=1024, safe=safe@entry=0, add=add@entry=0x0, rem=rem@entry=0x0, cb=cb@entry=0xfeca70) at crypto/bn/bn_prime.c:103
      #8  0x00007fb634828244 in rsa_builtin_keygen (cb=0xfeca70, e_value=<optimized out>, primes=2, bits=<optimized out>, rsa=<optimized out>) at crypto/rsa/rsa_gen.c:523
      #9  RSA_generate_multi_prime_key (rsa=<optimized out>, bits=<optimized out>, primes=2, e_value=<optimized out>, cb=0xfeca70) at crypto/rsa/rsa_gen.c:153
      #10 0x00000000004caeb0 in opensslrsa_generate (key=0x7fb63402e010, exp=0, callback=0x423620 <progress>) at opensslrsa_link.c:501
      #11 0x00000000004c039d in dst_key_generate (name=name@entry=0x7ffdf49dbcb0, alg=8, bits=bits@entry=2048, param=param@entry=0, flags=flags@entry=256, protocol=protocol@entry=3, rdclass=1, mctx=0xfc93a0, keyp=0x7ffdf49dbb20, 
          callback=0x423620 <progress>) at dst_api.c:871
      #12 0x0000000000422734 in main (argc=<optimized out>, argv=<optimized out>) at dnssec-keygen.c:787
      (gdb) bt full
      #0  bn_sqr8x_internal () at crypto/bn/x86_64-mont5.s:1759
      No locals.
      #1  0x00007fb63473cce5 in bn_power5 () at crypto/bn/x86_64-mont5.s:1171
      No locals.
      #2  0x00007fb63472a871 in BN_mod_exp_mont_consttime (rr=rr@entry=0xff0790, a=<optimized out>, a@entry=0xff0790, p=p@entry=0xff0778, m=m@entry=0xff27c0, ctx=ctx@entry=0xff06e0, in_mont=in_mont@entry=0xfef0c0) at crypto/bn/bn_exp.c:1007
              n0 = 0xfef110
              np = <optimized out>
              i = <optimized out>
              bits = 870
              ret = 0
              window = <optimized out>
              wvalue = <optimized out>
              wmask = 15
              window0 = 4
              top = 16
              mont = <optimized out>
              numPowers = <optimized out>
              powerbufFree = 0xffabb0 ""
              powerbufLen = <optimized out>
              powerbuf = <optimized out>
              tmp = {d = 0xffbbc0, top = 16, dmax = 16, neg = 0, flags = 2}
              am = {d = 0xffbc40, top = 16, dmax = 16, neg = 0, flags = 2}
      #3  0x00007fb63472aa5b in BN_mod_exp_mont (rr=rr@entry=0xff0790, a=a@entry=0xff0790, p=p@entry=0xff0778, m=m@entry=0xff27c0, ctx=ctx@entry=0xff06e0, in_mont=in_mont@entry=0xfef0c0) at crypto/bn/bn_exp.c:310
              i = <optimized out>
              j = <optimized out>
              bits = <optimized out>
              wstart = <optimized out>
              wend = <optimized out>
              window = <optimized out>
              wvalue = <optimized out>
              d = <optimized out>
              r = <optimized out>
              aa = <optimized out>
              val = <optimized out>
      #4  0x00007fb634732596 in witness (mont=0xfef0c0, ctx=0xff06e0, k=4, a1_odd=0xff0778, a1=0xff0748, a=0xff27c0, w=0xff0790) at crypto/bn/bn_prime.c:248
      No locals.
      #5  BN_is_prime_fasttest_ex (cb=0xfeca70, do_trial_division=<optimized out>, ctx_passed=0xff06e0, checks=<optimized out>, a=0xff27c0) at crypto/bn/bn_prime.c:222
              j = <optimized out>
              ctx = <optimized out>
              A1_odd = 0xff0778
              check = 0xff0790
              ret = <optimized out>
              k = 4
              A3 = 0xff0760
              mont = 0xfef0c0
              i = 0
              A1 = 0xff0748
              i = <optimized out>
              j = <optimized out>
              ret = <optimized out>
              k = <optimized out>
              ctx = <optimized out>
              A1 = <optimized out>
              A1_odd = <optimized out>
              A3 = <optimized out>
              check = <optimized out>
              mont = <optimized out>
              mod = <optimized out>
      #6  BN_is_prime_fasttest_ex (a=0xff27c0, checks=<optimized out>, ctx_passed=0xff06e0, do_trial_division=<optimized out>, cb=0xfeca70) at crypto/bn/bn_prime.c:150
              i = <optimized out>
              j = <optimized out>
              k = <optimized out>
              A1 = <optimized out>
              A1_odd = <optimized out>
              A3 = <optimized out>
              check = <optimized out>
              mod = <optimized out>
      #7  0x00007fb634732c51 in BN_generate_prime_ex (ret=ret@entry=0xff27c0, bits=bits@entry=1024, safe=safe@entry=0, add=add@entry=0x0, rem=rem@entry=0x0, cb=cb@entry=0xfeca70) at crypto/bn/bn_prime.c:103
              t = 0xff0730
              found = 0
              i = <optimized out>
              j = <optimized out>
              c1 = <optimized out>
              ctx = <optimized out>
              mods = 0xff6b90
              checks = 5
      #8  0x00007fb634828244 in rsa_builtin_keygen (cb=0xfeca70, e_value=<optimized out>, primes=2, bits=<optimized out>, rsa=<optimized out>) at crypto/rsa/rsa_gen.c:523
              retries = 0
              pinfo = 0x0
              prime = 0xff27c0
              ok = -1
              bitse = <optimized out>
              quo = <optimized out>
              bitst = <optimized out>
              r0 = 0xfee710
              r1 = 0xfee728
              tmp = <optimized out>
              n = 0
              i = <optimized out>
              rmd = <optimized out>
              ctx = 0xff0230
              error = <optimized out>
              r2 = 0xfee740
              bitsr = {1024, 1024, 0, 0, 0}
              adj = 0
              prime_infos = 0x0
              r0 = <optimized out>
              r1 = <optimized out>
              r2 = <optimized out>
              tmp = <optimized out>
              prime = <optimized out>
              ok = <optimized out>
              n = <optimized out>
              bitsr = <optimized out>
              bitse = <optimized out>
              i = <optimized out>
              quo = <optimized out>
              rmd = <optimized out>
              adj = <optimized out>
              retries = <optimized out>
              pinfo = <optimized out>
              prime_infos = <optimized out>
              ctx = <optimized out>
              bitst = <optimized out>
              error = <optimized out>
              j = <optimized out>
              prev_prime = <optimized out>
              pr0 = <optimized out>
              d = <optimized out>
              p = <optimized out>
      #9  RSA_generate_multi_prime_key (rsa=<optimized out>, bits=<optimized out>, primes=2, e_value=<optimized out>, cb=0xfeca70) at crypto/rsa/rsa_gen.c:153
      No locals.
      #10 0x00000000004caeb0 in opensslrsa_generate (key=0x7fb63402e010, exp=0, callback=0x423620 <progress>) at opensslrsa_link.c:501
              ret = 131073
              u = <optimized out>
              rsa = 0xfeca90
              e = 0xfec700
              cb = 0xfeca70
              pkey = 0xff0d70
      #11 0x00000000004c039d in dst_key_generate (name=name@entry=0x7ffdf49dbcb0, alg=8, bits=bits@entry=2048, param=param@entry=0, flags=flags@entry=256, protocol=protocol@entry=3, rdclass=1, mctx=0xfc93a0, keyp=0x7ffdf49dbb20, callback=0x423620 <progress>) at dst_api.c:871
              key = 0x7fb63402e010
              ret = <optimized out>
      #12 0x0000000000422734 in main (argc=<optimized out>, argv=<optimized out>) at dnssec-keygen.c:787
              algname = <optimized out>
              nametype = <optimized out>
              type = <optimized out>
              classname = <optimized out>
              endp = 0x7fb634ad116b <_dl_map_object_deps+1083> "H\203\275x\373\377\377"
              key = 0x0
              fname = {name = {magic = 1145983854, ndata = 0x7ffdf49dbdc0 "\aksk+zsk\006optout", length = 16, labels = 3, attributes = 1, offsets = 0x7ffdf49dbd00 "", buffer = 0x7ffdf49dbd80, link = {prev = 0xffffffffffffffff, next = 0xffffffffffffffff}, list = {head = 0x0, tail = 0x0}}, offsets = "\000\b\017", '\000' <repeats 21 times>, "\\Ь4\266\177\000\000\r\216\036\202\000\000\000\000\360\366\256\064\266\177\000\000\000\000\000\000\000\000\000\000`\277\235\364\375\177\000\000\220\241\236\364\375\177\000\000\235Ԭ4\266\177\000\000\004\000\000\000\000\000\000\000\230\242\236\364\375\177\000\000\360\366\256\064\266\177\000\000\370\275\235\364\375\177\000\000\364\275\235\364\375\177\000\000\000\000\000\000\000\000\000", buffer = {magic = 1114990113, base = 0x7ffdf49dbdc0, length = 255, used = 16, current = 0, active = 0, link = {prev = 0xffffffffffffffff, next = 0xffffffffffffffff}, mctx = 0x0, autore = false}, data = "\aksk+zsk\006optout\000\300\263e4\266\177\000\000h\276\235\364\375\177\000\000d\276\235\364\375\177\000\000\326Ѭ4\266\177", '\000' <repeats 18 times>, "h\275/4\266\177\000\000\020\340.4\266\177\000\000\327\070\254\064\266\177\000\000\207\360\226|\000\000\000\000\302[\362\001\000\000\000\000d\276\235\364\375\177\000\000+\t\000\000\375\177\000\000\060\277\235\364\375\177\000\000H5\254\064\266\177\000\000 \277\235\364\375\177\000\000\240\254\022\064\266\177\000\000\025", '\000' <repeats 23 times>, "X\277\235\364\375\177\000\000\207\360\226|", '\000' <repeats 12 times>, "\327"...}
              name = 0x7ffdf49dbcb0
              flags = <optimized out>
              kskflag = 0
              revflag = 0
              alg = 8 '\b'
              conflict = false
              null_key = false
              oldstyle = false
              mctx = 0xfc93a0
              ch = <optimized out>
              generator = <optimized out>
              param = 0
              protocol = 3
              size = <optimized out>
              signatory = 0
              ret = <optimized out>
              r = {base = 0x7ffdf49dcb90 "rsasha256", length = 9}
              filename = '\000' <repeats 16 times>, "\200\273\235\364\375\177\000\000\220\274\235\364\375\177\000\000\000\271\235\364\375\177\000\000\002", '\000' <repeats 11 times>, "\025\000\000\000\000\271\235\364\375\177", '\000' <repeats 19 times>, "\271\235\364\375\177\000\000P\361\256\064\266\177\000\000P\274\235\364\375\177\000\000\000\000\000\000\000\000\000\000\360\253\022\064\266\177\000\000\020\376\006\064\266\177", '\000' <repeats 34 times>, "\200\246\022\064\266\177\000\000\000\000\000\000\000\000\000\000\020\376\006\064\266\177\000\000\237\006\a4\266\177\000\000\300\263e4\266\177\000\000\000\000\000\000\000\000\000\000"...
              directory = 0x5da1f9 "."
              predecessor = <optimized out>
              prevkey = 0x0
              buf = {magic = 1114990113, base = 0x7ffdf49dbbb0, length = 254, used = 0, current = 0, active = 0, link = {prev = 0xffffffffffffffff, next = 0xffffffffffffffff}, mctx = 0x0, autore = false}
              log = 0xff2b00
              engine = <optimized out>
              rdclass = 1
              options = 100663296
              dbits = 0
              ttl = 0
              use_nsec3 = <optimized out>
              publish = 0
              activate = 0
              revokekey = 0
              inactive = 0
              deltime = 0
              now = 1567598963
              prepub = 0
              setpub = false
              setact = false
              setrev = false
              setinact = false
              setdel = false
              setttl = false
              unsetpub = false
              unsetact = false
              unsetrev = false
              unsetinact = false
              unsetdel = false
              genonly = false
              show_progress = true
              c = <optimized out>
              syncadd = 0
              syncdel = 0
              setsyncadd = false
              setsyncdel = false
              __res = <optimized out>
              __c = <optimized out>
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    يحدث العفن في الحمامات بسبب الرطوبة والماء الزائد، ويجب تنظيفه بشكل مستمر؛ لضمان عدم تراكمه على جدران الحمام، وفيما يأتي خطوات التخلّص من العفن: استخدام خل التفاح لتنظيف الأسطح المختلفة في الحمام، ويتم التنظيف به من خلال صبّ الخل بشكلٍ مباشرٍ على الأسطح، أو من خلال وضعه في زجاجة رذاذ دون تخفيفه، وبالرغم من رائحة الخل القوية والمزعجة إلا أنّه فعال جداً في إزالة العفن من الحمام. التنظيف بالبوراكس، وهو من المواد الفعالة لإزالة العفن، ويتمّ التنظيف به بعد خلط كوب منه مع أربعة لترات من الماء، وصبّ المحلول في عبوة رذاذ ورشه على الأسطح المتعفّنة، ثم فركها بفرشاة أو قطعة قماش. تجفيف الأسطح التي تم تنظيفها من العفن في الحمام بقطعة قماش نظيفة وجافة؛ وذلك لمنع عودة العفن من جديد، ولمنع الانزلاقات في الحمام.

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