Loading...

XML

Word

Printable

Details

Type: Bug
Resolution: Fixed
Priority: Critical
Fix Version/s: 3.0.1
Affects Version/s: 2.8.2
Component/s: SyncGateway
Security Level: Public
Labels:
None

Sprint:
CBG Sprint 95
Story Points:
1

Description

A race condition has been discovered in GetRoles() caused by the nil check, and the user.roles write being done at the same time when replicating 2 documents (with channels) with a custom sync function, and using users with explicit channels.

This needs to be fixed to make sure this function does not race. This can be done by adding a lock on the userImp struct and then using a read lock, and upgrading it when needed.

WARNING: DATA RACE

Read at 0x00c00097c0d0 by goroutine 117:

  github.com/couchbase/sync_gateway/auth.(*userImpl).GetRoles()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/auth/user.go:458 +0x5b

  github.com/couchbase/sync_gateway/auth.(*userImpl).InheritedChannels()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/auth/user.go:507 +0x90

  github.com/couchbase/sync_gateway/db.makeUserCtx()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:2239 +0x141

  github.com/couchbase/sync_gateway/db.(*Database).getChannelsAndAccess()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:2191 +0x330

  github.com/couchbase/sync_gateway/db.(*Database).runSyncFn()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:1422 +0x8b

  github.com/couchbase/sync_gateway/db.(*Database).documentUpdateFunc()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:1667 +0x425

  github.com/couchbase/sync_gateway/db.(*Database).updateAndReturnDoc.func1()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:1767 +0x504

  github.com/couchbaselabs/walrus.(*WalrusBucket).Update.func1()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbaselabs/walrus/crud.go:583 +0x55

  github.com/couchbaselabs/walrus.(*WalrusBucket).WriteUpdate()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbaselabs/walrus/crud.go:560 +0x1dc

  github.com/couchbaselabs/walrus.(*WalrusBucket).Update()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbaselabs/walrus/crud.go:586 +0x84

  github.com/couchbase/sync_gateway/base.(*LeakyBucket).Update()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/base/leaky_bucket.go:160 +0x201

  github.com/couchbase/sync_gateway/base.(*LoggingBucket).Update()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/base/logging_bucket.go:91 +0x1d2

  github.com/couchbase/sync_gateway/db.(*Database).updateAndReturnDoc()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:1755 +0xa2a

  github.com/couchbase/sync_gateway/db.(*Database).PutExistingRevWithConflictResolution()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:939 +0x528

  github.com/couchbase/sync_gateway/db.(*Database).PutExistingRev()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:923 +0x2564

  github.com/couchbase/sync_gateway/db.(*blipHandler).handleRev()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/blip_handler.go:943 +0x1a36

  github.com/couchbase/sync_gateway/db.userBlipHandler.func1()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/blip_handler.go:84 +0x7b

  github.com/couchbase/sync_gateway/db.(*BlipSyncContext).register.func1()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/blip_sync_context.go:169 +0x2fa

  github.com/couchbase/go-blip.(*Context).dispatchRequest()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/context.go:228 +0x275

  github.com/couchbase/go-blip.(*receiver).getPendingRequest.func1()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/receiver.go:266 +0x75

  github.com/couchbase/go-blip.(*Message).asyncRead.func1()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/message.go:371 +0x121

Previous write at 0x00c00097c0d0 by goroutine 115:

  github.com/couchbase/sync_gateway/auth.(*userImpl).GetRoles()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/auth/user.go:471 +0x385

  github.com/couchbase/sync_gateway/auth.(*userImpl).InheritedChannels()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/auth/user.go:507 +0x90

  github.com/couchbase/sync_gateway/db.makeUserCtx()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:2239 +0x141

  github.com/couchbase/sync_gateway/db.(*Database).getChannelsAndAccess()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:2191 +0x330

  github.com/couchbase/sync_gateway/db.(*Database).runSyncFn()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:1422 +0x8b

  github.com/couchbase/sync_gateway/db.(*Database).documentUpdateFunc()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:1667 +0x425

  github.com/couchbase/sync_gateway/db.(*Database).updateAndReturnDoc.func1()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:1767 +0x504

  github.com/couchbaselabs/walrus.(*WalrusBucket).Update.func1()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbaselabs/walrus/crud.go:583 +0x55

  github.com/couchbaselabs/walrus.(*WalrusBucket).WriteUpdate()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbaselabs/walrus/crud.go:560 +0x1dc

  github.com/couchbaselabs/walrus.(*WalrusBucket).Update()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbaselabs/walrus/crud.go:586 +0x84

  github.com/couchbase/sync_gateway/base.(*LeakyBucket).Update()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/base/leaky_bucket.go:160 +0x201

  github.com/couchbase/sync_gateway/base.(*LoggingBucket).Update()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/base/logging_bucket.go:91 +0x1d2

  github.com/couchbase/sync_gateway/db.(*Database).updateAndReturnDoc()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:1755 +0xa2a

  github.com/couchbase/sync_gateway/db.(*Database).PutExistingRevWithConflictResolution()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:939 +0x528

  github.com/couchbase/sync_gateway/db.(*Database).PutExistingRev()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/crud.go:923 +0x2564

  github.com/couchbase/sync_gateway/db.(*blipHandler).handleRev()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/blip_handler.go:943 +0x1a36

  github.com/couchbase/sync_gateway/db.userBlipHandler.func1()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/blip_handler.go:84 +0x7b

  github.com/couchbase/sync_gateway/db.(*BlipSyncContext).register.func1()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/sync_gateway/db/blip_sync_context.go:169 +0x2fa

  github.com/couchbase/go-blip.(*Context).dispatchRequest()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/context.go:228 +0x275

  github.com/couchbase/go-blip.(*receiver).getPendingRequest.func1()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/receiver.go:266 +0x75

  github.com/couchbase/go-blip.(*Message).asyncRead.func1()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/message.go:371 +0x121

Goroutine 117 (running) created at:

  github.com/couchbase/go-blip.(*Message).asyncRead()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/message.go:357 +0x344

  github.com/couchbase/go-blip.(*receiver).getPendingRequest()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/receiver.go:265 +0x545

  github.com/couchbase/go-blip.(*receiver).processFrame()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/receiver.go:220 +0x1ab

  github.com/couchbase/go-blip.(*receiver).handleIncomingFrame()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/receiver.go:209 +0xca4

  github.com/couchbase/go-blip.(*receiver).parseLoop()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/receiver.go:103 +0x1cc

  github.com/couchbase/go-blip.(*receiver).receiveLoop- dwrap- 13()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/receiver.go:60 +0x39

Goroutine 115 (running) created at:

  github.com/couchbase/go-blip.(*Message).asyncRead()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/message.go:357 +0x344

  github.com/couchbase/go-blip.(*receiver).getPendingRequest()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/receiver.go:265 +0x545

  github.com/couchbase/go-blip.(*receiver).processFrame()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/receiver.go:220 +0x1ab

  github.com/couchbase/go-blip.(*receiver).handleIncomingFrame()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/receiver.go:209 +0xca4

  github.com/couchbase/go-blip.(*receiver).parseLoop()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/receiver.go:103 +0x1cc

  github.com/couchbase/go-blip.(*receiver).receiveLoop- dwrap- 13()

      /Users/isaaclambat/dev/sync-gateway/master/godeps/src/github.com/couchbase/go-blip/receiver.go:60 +0x39

==================

Attachments

Issue Links

Clones

CBG-1864 Fix race condition caused when getting user roles

Closed

Activity

People

Assignee:: Isaac Lambat

Reporter:: Isaac Lambat

Votes:: 0 Vote for this issue

Watchers:: 1 Start watching this issue

Dates

Created:: 21/Mar/22 10:49 AM

Updated:: 15/Apr/22 8:33 AM

Resolved:: 28/Mar/22 6:28 AM

[3.0.1 backport] Fix race condition caused when getting user roles