BUG #15943: Valgrind-detected error in SlruPhysicalWritePage - Mailing list pgsql-bugs
From | PG Bug reporting form |
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Subject | BUG #15943: Valgrind-detected error in SlruPhysicalWritePage |
Date | |
Msg-id | 15943-c7232c75bb276d6c@postgresql.org Whole thread Raw |
Responses |
Re: BUG #15943: Valgrind-detected error in SlruPhysicalWritePage
(Andres Freund <andres@anarazel.de>)
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List | pgsql-bugs |
The following bug has been logged on the website: Bug reference: 15943 Logged by: Alexander Lakhin Email address: exclusion@gmail.com PostgreSQL version: 12beta2 Operating system: Ubuntu 18.04 Description: When running under valgrind (sitting on the master branch): printf "SELECT pg_notify('notify_async1',NULL); %.0s" `seq 2048` | psql I get the following error: ==00:00:00:12.885 19648== Syscall param write(buf) points to uninitialised byte(s) ==00:00:00:12.885 19648== at 0x5054281: write (write.c:27) ==00:00:00:12.885 19648== by 0x2687F0: SlruPhysicalWritePage (slru.c:851) ==00:00:00:12.885 19648== by 0x268E95: SlruInternalWritePage (slru.c:543) ==00:00:00:12.885 19648== by 0x2690F1: SlruSelectLRUPage (slru.c:1095) ==00:00:00:12.885 19648== by 0x269777: SimpleLruZeroPage (slru.c:269) ==00:00:00:12.885 19648== by 0x31DABA: asyncQueueAddEntries (async.c:1379) ==00:00:00:12.885 19648== by 0x31F130: PreCommit_Notify (async.c:845) ==00:00:00:12.885 19648== by 0x273C19: CommitTransaction (xact.c:2128) ==00:00:00:12.885 19648== by 0x274A10: CommitTransactionCommand (xact.c:2921) ==00:00:00:12.885 19648== by 0x53BD7D: finish_xact_command (postgres.c:2597) ==00:00:00:12.885 19648== by 0x53E2F3: exec_simple_query (postgres.c:1256) ==00:00:00:12.885 19648== by 0x540545: PostgresMain (postgres.c:4256) ==00:00:00:12.885 19648== Address 0xf4f95bf is in a rw- anonymous segment ==00:00:00:12.885 19648== Uninitialised value was created by a stack allocation ==00:00:00:12.885 19648== at 0x31D967: asyncQueueAddEntries (async.c:1306) Increasing the count to 8192 produces another one, slightly different stack: ==00:00:00:29.999 19648== Syscall param write(buf) points to uninitialised byte(s) ==00:00:00:29.999 19648== at 0x5054281: write (write.c:27) ==00:00:00:29.999 19648== by 0x2687F0: SlruPhysicalWritePage (slru.c:851) ==00:00:00:29.999 19648== by 0x268E95: SlruInternalWritePage (slru.c:543) ==00:00:00:29.999 19648== by 0x26A1BD: SimpleLruTruncate (slru.c:1234) ==00:00:00:29.999 19648== by 0x31D5A5: asyncQueueAdvanceTail (async.c:2022) ==00:00:00:29.999 19648== by 0x31F231: ProcessCompletedNotifies (async.c:1132) ==00:00:00:29.999 19648== by 0x5403D1: PostgresMain (postgres.c:4176) ==00:00:00:29.999 19648== by 0x4B16D9: BackendRun (postmaster.c:4431) ==00:00:00:29.999 19648== by 0x4B481B: BackendStartup (postmaster.c:4122) ==00:00:00:29.999 19648== by 0x4B4B32: ServerLoop (postmaster.c:1704) ==00:00:00:29.999 19648== by 0x4B5F70: PostmasterMain (postmaster.c:1377) ==00:00:00:29.999 19648== by 0x406428: main (main.c:228) ==00:00:00:29.999 19648== Address 0xf4fb5bf is in a rw- anonymous segment ==00:00:00:29.999 19648== Uninitialised value was created by a stack allocation ==00:00:00:29.999 19648== at 0x31D967: asyncQueueAddEntries (async.c:1306) (It's also reproduced on REL_12_BETA3, REL9_6_15.)
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