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Fix shared memory calculation size of PgAioCtl

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The shared memory size was calculated based on an offset of io_handles,
which is itself a pointer included in the structure.  We tend to
overestimate the shared memory size overall, so this was unlikely an
issue in practice, but let's be correct and use the full size of the
structure in the calculation, so as the pointer for io_handles is
included.

Oversight in da7226993f.

Author: Madhukar Prasad <madhukarprasad@google.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com>
Discussion: https://postgr.es/m/CAKi+wrbC2dTzh_vKJoAZXV5wqTbhY0n4wRNpCjJ=e36aoo0kFw@mail.gmail.com
Backpatch-through: 18
This commit is contained in:
Michael Paquier
2025-09-17 09:33:32 +09:00
parent ac06ea8f7b
commit 158c48303e
1 changed files with 1 additions and 5 deletions
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6
src/backend/storage/aio/aio_init.c
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@@ -30,12 +30,8 @@
static Size static Size
AioCtlShmemSize(void) AioCtlShmemSize(void)
{ {
Size sz;
/* pgaio_ctl itself */ /* pgaio_ctl itself */
sz = offsetof(PgAioCtl, io_handles); return sizeof(PgAioCtl);
return sz;
} }
static uint32 static uint32