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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Peter Barfuss 𒀱‏ @bofh453 Mar 6

      *listening to music, which abruptly stops* wtf? Program received signal SIGILL, Illegal instruction. (gdb) bt #0 decode_ics.constprop.28 () #1 aac_decode_frame () #2 avcodec_decode_audio3 () (gdb) x/i $pc => 0x8b8faa <decode_ics.constprop.28+4074>:rex.RB (bad) WTF???

      1 reply 0 retweets 13 likes
    2. Kieran Kunhya‏ @kierank_ Mar 6
      Replying to @bofh453

      AVX512 CPU?

      1 reply 0 retweets 0 likes
    3. Peter Barfuss 𒀱‏ @bofh453 Mar 6
      Replying to @kierank_

      nope, Haswell. also the bizarre thing is this was a copy of mpv that was run with --loop=inf & running fine for like the past hour before suddenly going SIGILL & now deterministically failing on nonsense opcodes? something tells me I'll have a headache in an hour.

      1 reply 0 retweets 6 likes
    4. Peter Barfuss 𒀱‏ @bofh453 Mar 6
      Replying to @bofh453 @kierank_

      So I had a spare copy of http://libavcodec.so  in my git tree & it's *almost* identical to the one in my /usr/lib/, here's the difference:

      1 reply 2 retweets 14 likes
    5. Peter Barfuss 𒀱‏ @bofh453 Mar 6
      Replying to @bofh453 @kierank_

      The one in my /usr/lib/: 8b8fa5: 47 0f b7 34 54 movzx r14d,WORD PTR [r12+r10*2] 8b8faa: 45 0f b5 rex.RB (bad) 8b8fad: d6 (bad) 8b8fae: 45 89 d1 mov r9d,r10d

      2 replies 1 retweet 13 likes
    6. Peter Barfuss 𒀱‏ @bofh453 Mar 6
      Replying to @bofh453 @kierank_

      The one in my git tree: 8b8fa5: 47 0f b7 34 54 movzx r14d,WORD PTR [r12+r10*2] 8b8faa: 45 0f b7 d6 movzx r10d,r14w 8b8fae: 45 89 d1 mov r9d,r10d

      2 replies 1 retweet 13 likes
    7. Peter Barfuss 𒀱‏ @bofh453 Mar 6
      Replying to @bofh453 @kierank_

      At this point I'm seriously considering the cause is my harddrive is haunted.

      2 replies 1 retweet 12 likes
    8. Paul Khuong‏ @pkhuong Mar 6
      Replying to @bofh453 @kierank_

      single bit flip… are you ECCed? (:

      1 reply 0 retweets 8 likes
    9. Peter Barfuss 𒀱‏ @bofh453 Mar 6
      Replying to @pkhuong @kierank_

      Amusingly despite being an ECCvangelist I'm not since GLHF finding ECC SODIMMs (seriously, if there's a source for those that's reasonably priced, do link me), so yeah it's quite likely that. I got cosmic ray'd or somesuch.

      1 reply 1 retweet 21 likes
      Rich Felker‏ @RichFelker Apr 1
      Replying to @bofh453 @pkhuong @kierank_

      I'm skeptical because it seems it's always on Windows this happens. Seems at least as likely the kernel has on out-of-bounds *p|=flagbit...

      12:57 PM - 1 Apr 2018
      • 5 Likes
      • Chris Woods pub unsafe { Esteban Küber; } Jon Stephenson Real AI
      1 reply 0 retweets 5 likes
        1. Real AI‏ @Luiz0x29A Apr 1
          Replying to @RichFelker @bofh453 and

          do Windows crash more or it just have more asserts ? ... to be fair most of the problems on windoes is always third party software like drivers

          0 replies 0 retweets 1 like
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