Acquire ControlFileLock in relevant SQL functions. Commit dc7d70ea added functions that read the control file, but didn't acquire ControlFileLock. With unlucky timing, file systems that have weak interlocking like ext4 and ntfs could expose partially overwritten contents, and the checksum would fail.
Back-patch to all supported releases. Reviewed-by: David Steele <[email protected]> Reviewed-by: Anton A. Melnikov <[email protected]> Reviewed-by: Michael Paquier <[email protected]> Discussion: https://postgr.es/m/20221123014224.xisi44byq3cf5psi%40awork3.anarazel.de Branch ------ REL_15_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/606be8a35d9726b6c0468428b6262e58d9e308af Modified Files -------------- src/backend/utils/misc/pg_controldata.c | 9 +++++++++ 1 file changed, 9 insertions(+)
