Leaving pinentry input for a long time with age decryption crashes emacs

[sochotnicky]

I am not certain this belongs here but perhaps you'd be able to redirect.
I have a following confgi:

(use-package age
  :custom
  (age-program "rage")
  (age-default-identity '("~/.config/age/identity.age"))
  (age-default-recipient
   '( "age1yubikey1..."
     ;; Backup age key
     "age1...."))
  :config
  (age-file-enable))

Also have (pinentry-start). Emacs 30.2

When I start something that requests access to authinfo.age and leave pinentry request for a while (cutoff seems about 30 seconds), return and enter the pin emacs starts using 100% CPU and then crashes when I try to interrupt with ctrl-g. Traceback below (sorry no debuginfos, I can try to add that). I can try to prepare a mini reproducer if this helps as well. But maybe you'd have workaround idea to try?

Backtrace:nded  emacs -nw
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x16ca4f) [0x64aed888ea4f]                                                                                  7.97s       DuckDuckGo Enterprise Agreement ﴃ 
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x4aa6f) [0x64aed876ca6f]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x4b085) [0x64aed876d085]                                                                                                 DuckDuckGo Enterprise Agreement ﴃ 
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x4ad9d) [0x64aed876cd9d]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x16c0b9) [0x64aed888e0b9]
/nix/store/vr7ds8vwbl2fz7pr221d5y0f8n9a5wda-glibc-2.40-218/lib/libc.so.6(+0x419c0) [0x72c73e6419c0]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e2474) [0x64aed8904474]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1bb3d3) [0x64aed88dd3d3]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e3dce) [0x64aed8905dce]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e58a1) [0x64aed89078a1]
/home/sochotnicky/.config/doom-local/cache/eln/30.2-cfa4b70e/pinentry-08be12ee-9b56700b.eln(F70696e656e7472792d2d70726f636573732d66696c746572_pinentry__process_filter_0+0x26e) [0x72c72c5fcf8e]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5993) [0x64aed8907993]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5e40) [0x64aed8907e40]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e6110) [0x64aed8908110]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e12da) [0x64aed89032da]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x245659) [0x64aed8967659]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x24d9eb) [0x64aed896f9eb]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x24febd) [0x64aed8971ebd]
/home/sochotnicky/.config/doom-local/cache/eln/30.2-cfa4b70e/age-038a0cfb-cf9750f7.eln(F6167652d776169742d666f722d636f6d706c6574696f6e_age_wait_for_completion_0+0x9a) [0x72c72ad535aa]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5993) [0x64aed8907993]
/home/sochotnicky/.config/doom-local/cache/eln/30.2-cfa4b70e/age-038a0cfb-cf9750f7.eln(F6167652d646563727970742d66696c65_age_decrypt_file_0+0x133) [0x72c72ad54fb3]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5993) [0x64aed8907993]
/home/sochotnicky/.config/doom-local/cache/eln/30.2-cfa4b70e/age-038a0cfb-cf9750f7.eln(F6167652d66696c652d696e736572742d66696c652d636f6e74656e7473_age_file_insert_file_contents_0+0x8f0) [0x72c72ad58c90]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5993) [0x64aed8907993]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5e40) [0x64aed8907e40]
/home/sochotnicky/.config/doom-local/cache/eln/30.2-cfa4b70e/age-038a0cfb-cf9750f7.eln(F6167652d66696c652d68616e646c6572_age_file_handler_0+0xfa) [0x72c72ad57eda]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5993) [0x64aed8907993]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x18aba7) [0x64aed88acba7]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/lib/emacs/30.2/native-lisp/30.2-cfa4b70e/auth-source-49df7eef-cdb89bfd.eln(F617574682d736f757263652d6e657472632d7061727365_auth_source_netrc_parse_0+0x5a2) [0x72c72c3a8fe2]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5993) [0x64aed8907993]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5e40) [0x64aed8907e40]
/home/sochotnicky/.config/doom-local/cache/eln/30.2-cfa4b70e/ghub-2a136109-005390ba.eln(F617574682d736f757263652d6e657472632d70617273654068616e646c652d73796d6c696e6b_auth_source_netrc_parsehandle_symlink_0+0xc2) [0x72c729a92b82]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5993) [0x64aed8907993]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5e40) [0x64aed8907e40]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x234e46) [0x64aed8956e46]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5993) [0x64aed8907993]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/lib/emacs/30.2/native-lisp/30.2-cfa4b70e/auth-source-49df7eef-cdb89bfd.eln(F617574682d736f757263652d6e657472632d736561726368_auth_source_netrc_search_0+0x31e) [0x72c72c3aac7e]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5993) [0x64aed8907993]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5e40) [0x64aed8907e40]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/lib/emacs/30.2/native-lisp/30.2-cfa4b70e/auth-source-49df7eef-cdb89bfd.eln(F617574682d736f757263652d7365617263682d6261636b656e6473_auth_source_search_backends_0+0x20a) [0x72c72c3a726a]
/nix/store/d409x1if0yrgdpkfpwxxs16rsv7n1yhk-emacs-pgtk-30.2/bin/emacs(+0x1e5993) [0x64aed8907993]
...
zsh: IOT instruction (core dumped)  emacs -nw

When the problem happens I see GETPIN error (error "Selecting deleted buffer") while the CPU spins

[anticomputer]

hrmm interesting, I'll see if I can wrap that in some more defensive code so if the process or buffer does get yoked it doesn't cascade

[sochotnicky]

FWIW, I've attempted to create an automated reproducer but failed. I can reproduce with emacs -Q manually, but when I "orchestrate" things using tmux/emacs-client I can't get emacs to freeze 🤷

I've also tried adding some fixes to the code to handle disappearing pinentry-emacs better but it didn't actually resolve the underlying issue itself.