signal: factor out the kernel reserved si_code check

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The check that prevents userspace from sending siginfo with si_code values
reserved to the kernel is duplicated across do_rt_sigqueueinfo(),
do_rt_tgsigqueueinfo() and do_pidfd_send_signal().  Move the check into a
helper so the rule lives in one place.

Link: https://lore.kernel.org/20260806133013.4341-1-include@grrlz.net
Signed-off-by: Bradley Morgan <include@grrlz.net>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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Bradley Morgan 2026-08-06 13:30:13 +00:00 • committed by Andrew Morton

parent a63308ab42

commit 9b836cd566

1 changed files with 14 additions and 11 deletions

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kernel/signal.c

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