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commit f47d859fcd19d6e8b483a0f594b630b1f6292a73 Author: Thomas Munro <[email protected]> AuthorDate: Fri Jul 15 01:23:29 2022 +1200 Don't clobber postmaster sigmask in dsm_impl_resize. Commit 4518c798 intended to block signals in regular backends that allocate DSM segments, but dsm_impl_resize() is also reached by dsm_postmaster_startup(). It's not OK to clobber the postmaster's signal mask, so only manipulate the signal mask when under the postmaster. Back-patch to all releases, like 4518c798. Discussion: https://postgr.es/m/CA%2BhUKGKNpK%3D2OMeea_AZwpLg7Bm4%3DgYWk7eDjZ5F6YbozfOf8w%40mail.gmail.com --- src/backend/storage/ipc/dsm_impl.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/src/backend/storage/ipc/dsm_impl.c b/src/backend/storage/ipc/dsm_impl.c index d13d6e8a41..873ed80e32 100644 --- a/src/backend/storage/ipc/dsm_impl.c +++ b/src/backend/storage/ipc/dsm_impl.c @@ -362,7 +362,8 @@ dsm_impl_posix_resize(int fd, off_t size) * allowed SIGUSR1 to interrupt us repeatedly (for example, due to recovery * conflicts), the retry loop might never succeed. */ - PG_SETMASK(&BlockSig); + if (IsUnderPostmaster) + PG_SETMASK(&BlockSig); /* Truncate (or extend) the file to the requested size. */ do @@ -402,9 +403,12 @@ dsm_impl_posix_resize(int fd, off_t size) } #endif /* HAVE_POSIX_FALLOCATE && __linux__ */ - save_errno = errno; - PG_SETMASK(&UnBlockSig); - errno = save_errno; + if (IsUnderPostmaster) + { + save_errno = errno; + PG_SETMASK(&UnBlockSig); + errno = save_errno; + } return rc; } --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
