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coredump: add support for new %F PIDFD specifier

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A new core_pattern specifier was added, %F, to provide a PIDFD
to the usermode helper process referring to the crashed process.
This removes all possible race conditions, ensuring only the
crashed process gets inspected by systemd-coredump.
This commit is contained in:
Luca Boccassi
2025-04-13 22:10:36 +01:00
committed by Zbigniew Jędrzejewski-Szmek
parent 13902e0253
commit 868d95577e
3 changed files with 70 additions and 3 deletions
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2
sysctl.d/50-coredump.conf.in
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@@ -13,7 +13,7 @@
# the core dump.
#
# See systemd-coredump(8) and core(5).
kernel.core_pattern=|{{LIBEXECDIR}}/systemd-coredump %P %u %g %s %t %c %h %d
kernel.core_pattern=|{{LIBEXECDIR}}/systemd-coredump %P %u %g %s %t %c %h %d %F
# Allow 16 coredumps to be dispatched in parallel by the kernel.
# We collect metadata from /proc/%P/, and thus need to make sure the crashed