Bug 272401 – iOS 17.4: WebContent crash-loops in iOS Simulator when trying to open any website

• Status: RESOLVED
• Resolution: DUPLICATE
• Component: WebKit Process Model

[Alexey Proskuryakov]

When I try to open any website in MobileSafari in simulator, WebContent just crash-loops.

1. build-webkit --ios-simulator --release
2. run-safari --ios-simulator --release
3. Try opening apple.com

There is no crash log generated, and I don't see anything obvious in the system log - there are some lines about the process being launched, and then a process close notification right away.

default	08:31:12.889637-0700	MobileSafari	0x115018c40 - [PID=9362] WebProcessProxy::didFinishLaunching:
default	08:31:12.889683-0700	MobileSafari	0x115018d08 - [PID=9362] ProcessThrottler::didConnectToProcess
default	08:31:12.889693-0700	MobileSafari	0x115018d08 - [PID=9362] ProcessThrottler::setThrottleState: Updating process assertion type to 3 (foregroundActivities=1, backgroundActivities=3)
default	08:31:12.889709-0700	MobileSafari	AssertionCapability::AssertionCapability: taking assertion Foreground
default	08:31:12.889961-0700	MobileSafari	0x600001709100 - WKProcessAssertionBackgroundTaskManager: beginBackgroundTaskWithName
default	08:31:12.889991-0700	MobileSafari	WKProcessAssertionBackgroundTaskManager: Took a FinishTaskInterruptable assertion for own process
default	08:31:12.890003-0700	MobileSafari	0x115018c40 - [PID=9362] WebProcessProxy::didChangeThrottleState: type=2
default	08:31:12.890048-0700	MobileSafari	0x115018c40 - [PID=9362] WebProcessProxy::didChangeThrottleState(Foreground) Taking foreground assertion for network process
default	08:31:12.890072-0700	MobileSafari	0x1150c4c40 - ProcessAssertion::acquireSync Trying to take RBS assertion 'WebProcess Foreground Assertion' for process with PID=9362
default	08:31:12.890140-0700	MobileSafari	0x1150e1b40 - NetworkProcessProxy::NetworkProcessProxy
default	08:31:12.890261-0700	runningboardd	Invalidating assertion 611-1565-27908 (target:[xpcservice<com.apple.WebKit.WebContent([app<com.apple.mobilesafari((null))>:1565])>:9362]) from originator [app<com.apple.mobilesafari((null))>:1565]
default	08:31:12.890405-0700	runningboardd	Acquiring assertion targeting [app<com.apple.mobilesafari((null))>:1565] from originator [app<com.apple.mobilesafari((null))>:1565] with description <RBSAssertionDescriptor| "WebKit UIProcess background task" ID:611-1565-27911 target:1565 attributes:[
	<RBSDomainAttribute| domain:"com.apple.common" name:"FinishTaskInterruptable" sourceEnvironment:"(null)">
	]>
default	08:31:12.890453-0700	runningboardd	Assertion 611-1565-27911 (target:[app<com.apple.mobilesafari((null))>:1565]) will be created as inactive as start-time-defining assertions exist
default	08:31:12.890932-0700	runningboardd	Acquiring assertion targeting [xpcservice<com.apple.WebKit.WebContent([app<com.apple.mobilesafari((null))>:1565])>:9362](WebProcess9362) from originator [app<com.apple.mobilesafari((null))>:1565] with description <RBSAssertionDescriptor| "Browser Engine helper assertion targeting pid 9362" ID:611-1565-27912 target:9362<WebProcess9362> attributes:[
	<RBSDomainAttribute| domain:"com.apple.webkit" name:"Foreground" sourceEnvironment:"(null)">
	]>
default	08:31:12.891227-0700	runningboardd	Assertion 611-1565-27912 (target:[xpcservice<com.apple.WebKit.WebContent([app<com.apple.mobilesafari((null))>:1565])>:9362](WebProcess9362)) will be created as active
default	08:31:12.890614-0700	MobileSafari	0x1150b1710 - [PID=0, throttler=0x1150e1c08] ProcessThrottler::Activity::Activity: Starting foreground activity / 'Networking for foreground view(s)'
default	08:31:12.891432-0700	containermanagerd_system	[0x104604780] activating connection: mach=false listener=false peer=true name=com.apple.containermanagerd.system.peer[9362].0x104604780
default	08:31:12.890696-0700	MobileSafari	0x1150e1b40 - NetworkProcessProxy::sendXPCEndpointToProcess(0x115018c40) state = 1 has connection = 1 XPC endpoint message = 0x0
default	08:31:12.891880-0700	containermanagerd_system	stat [/Users/ap/Library/Developer/CoreSimulator/Devices/C60B4B1C-1B8C-4E6F-B796-2E22FEBB4FCF/data/Containers/Shared/SystemGroup/systemgroup.com.apple.nsurlstoragedresources/.com.apple.mobile_container_manager.metadata.plist]: exists: 1, isDirectory: 0, fsNode: <MCMFSNode: 0x600000220800; inode = 820985, device = 16777235, ctime = 1712641863, isDirectory = NO, isSymlink = NO>
default	08:31:12.892124-0700	containermanagerd_system	Query result: count = 1, error = (null)
default	08:31:12.891294-0700	MobileSafari	0x1150c4c40 - ProcessAssertion() Successfully granted capability
default	08:31:12.891433-0700	runningboardd	Calculated state for xpcservice<com.apple.WebKit.WebContent([app<com.apple.mobilesafari((null))>:1565])>: running-active (role: UserInteractiveFocal) (endowments: (null))
default	08:31:12.892149-0700	containermanagerd_system	[501] command=39, client=<com.apple.WebKit.WebContent, u=<501/20/501/2/501>, uid=501, pid=9362, sandboxed=0, platform=7 (1/1/1) [(null)], cs cached>, error=(null)
default	08:31:12.891541-0700	runningboardd	[xpcservice<com.apple.WebKit.WebContent([app<com.apple.mobilesafari((null))>:1565])>:9362] Set darwin role to: UserInteractiveFocal
default	08:31:12.891590-0700	runningboardd	9362 Set Darwin GPU to "allow"
default	08:31:12.892232-0700	runningboardd	Configuring RB job for extension: `Optional("com.apple.WebKit.Networking")`
default	08:31:12.892918-0700	runningboardd	Executing launch request for xpcservice<com.apple.WebKit.Networking([app<com.apple.mobilesafari((null))>:1565])> (Launching extension com.apple.WebKit.Networking(A878254C-0F46-452C-ACFD-D93195E58239 for host 1565)
default	08:31:12.892945-0700	runningboardd	Checking PreventLaunch: global:0 exPath:(null) predicates:(null) allow:(null)
default	08:31:12.892967-0700	runningboardd	Creating and launching job for: xpcservice<com.apple.WebKit.Networking([app<com.apple.mobilesafari((null))>:1565])>
default	08:31:12.893038-0700	runningboardd	'F9FACA47-3768-4D55-A133-B20F8BEA2F5A' Submitting extension overlay (host PID 1565, path /Library/Developer/CoreSimulator/Volumes/iOS_21E213/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 17.4.simruntime/Contents/Resources/RuntimeRoot/System/Library/ExtensionKit/Extensions/NetworkingExtension.appex/com.apple.WebKit.Networking):
<dictionary: 0x600002629d40> { count = 2, transaction: 0, voucher = 0x0, contents =
	"XPCService" => <dictionary: 0x60000262a3a0> { count = 13, transaction: 0, voucher = 0x0, contents =
		"_ManagedBy" => <string: 0x600000c4df50> { length = 22, contents = "com.apple.runningboard" }
		"RunLoopType" => <string: 0x600000c4c810> { length = 9, contents = "NSRunLoop" }
		"_SandboxProfile" => <string: 0x600000c4e220> { length = 27, contents = "com.apple.WebKit.Networking" }
		"_AdditionalSubServices" => <dictionary: 0x600002629200> { count = 1, transaction: 0, voucher = 0x0, contents =
			"apple-extension-service" => <bool: 0x1e484cec0>: true
		}
		"_ProcessType" => <string: 0x600000c4fcc0> { length = 3, contents = "App" }
		"_AdditionalProperties" => <dictionary: 0x6000026294a0> { count = 1, transaction: 0, voucher = 0x0, contents =
			"RunningBoard" => <dictionary: 0x6000026287e0> { count = 5, transaction: 0, voucher = 0x0, contents =
				"Managed" => <bool: 0x1e484cec0>: true
				"RunningBoardLaunchedIdentity" => <dictionary: 0x6000026299e0> { count = 7, transaction: 0, voucher = 0x0, contents =
					"u" => <uuid: 0x600000c4fba0> F9FACA47-3768-4D55-A133-B20F8BEA2F5A
					"TYPE" => <int64: 0xb1629c9faaf12017>: 4
					"v" => <data: 0x6000017a2600>: { length = 189 bytes, contents = 0x62706c6973743030d30102030405065c6c735265636f7264... }
					"h" => <int64: 0xb1629c9faaf110df>: 1565
					"i" => <string: 0x600000c4d9b0> { length = 27, contents = "com.apple.WebKit.Networking" }
					"r" => <int64: 0xb1629c9faaf12027>: 2
					"H" => <dictionary: 0x60000262af40> { count = 2, transaction: 0, voucher = 0x0, contents =
						"TYPE" => <int64: 0xb1629c9faaf12027>: 2
						"EAI" => <string: 0x600000c4f7b0> { length = 22, contents = "com.apple.mobilesafari" }
					}
				}
				"Backoff" => <bool: 0x1e484cec0>: true
				"RunningBoardLaunched" => <bool: 0x1e484cec0>: true
				"LaunchRequestEndpointIdentifiers" => <dictionary: 0x600002629ce0> { count = 2, transaction: 0, voucher = 0x0, contents =
					"com.apple.WebKit.Networking" => <bool: 0x1e484cec0>: true
					"com.apple.frontboard.workspace-service" => <string: 0x600000c4da70> { length = 27, contents = "com.apple.WebKit.Networking" }
				}
			}
		}
		"EnvironmentVariables" => <dictionary: 0x60000262a520> { count = 2, transaction: 0, voucher = 0x0, contents =
			"EXTENSION_KIT_EXTENSION_TYPE" => <string: 0x600000c4de90> { length = 1, contents = "8" }
			"BSServiceDomains" => <string: 0x600000c4ee20> { length = 46, contents = "{"XPCService":{"Services":{"MainService":{}}}}" }
		}
		"_OmitSandboxParameters" => <bool: 0x1e484cec0>: true
		"_AbandonCoalition" => <bool: 0x1e484cee0>: false
		"_MultipleInstances" => <bool: 0x1e484cec0>: true
		"ServiceType" => <string: 0x600000c4fab0> { length = 11, contents = "Application" }
		"ProgramArguments" => <array: 0x600000c4dcb0> { count = 1, capacity = 8, contents =
			0: <string: 0x600000c4c750> { length = 245, contents = "/Library/Developer/CoreSimulator/Volumes/iOS_21E213/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 17.4.simruntime/Contents/Resources/RuntimeRoot/System/Library/ExtensionKit/Extensions/NetworkingExtension.appex/com.apple.WebKit.Networking" }
		}
		"_ManagedBy_Services" => <array: 0x600000c4f960> { count = 1, capacity = 8, contents =
			0: <string: 0x600000c4f9f0> { length = 27, contents = "com.apple.WebKit.Networking" }
		}
	}
	"CFBundlePackageType" => <string: 0x600000c4d6b0> { length = 4, contents = "XPC!" }
}
default	08:31:12.893271-0700	runningboardd	<OSLaunchdJob | handle=4C146184-C3BE-4D87-8B88-B4052528C076>: submitExtension created a job
default	08:31:12.893412-0700	runningboardd	<OSLaunchdJob | handle=4C146184-C3BE-4D87-8B88-B4052528C076>: createInstance created a job <OSLaunchdJob | handle=B037E901-50BE-4C87-848E-53BDFE6CA6CF>
default	08:31:12.895172-0700	MobileSafari	[0x102837d50] Re-initialization successful; calling out to event handler with XPC_ERROR_CONNECTION_INTERRUPTED
error	08:31:12.895186-0700	MobileSafari	0x115018c40 - [PID=9362] WebProcessProxy::didClose: (web process 0 crash)
default	08:31:12.895226-0700	containermanagerd_system	[0x104604780] invalidated after getting a no-senders notification - client is gone
error	08:31:12.895206-0700	MobileSafari	0x115018c40 - [PID=9362] WebProcessProxy::processDidTerminateOrFailedToLaunch: reason=Crash
default	08:31:12.895219-0700	MobileSafari	0x1150b0450 - [PID=9362, throttler=0x115018d08] ProcessThrottler::Activity::invalidate: Ending background activity / 'WebProcess initialization'
default	08:31:12.895230-0700	MobileSafari	0x115018c40 - [PID=9362] WebProcessProxy::shutDown:
default	08:31:12.895240-0700	MobileSafari	AssertionCapability::AssertionCapability: taking assertion Background
default	08:31:12.895268-0700	MobileSafari	0x115018c40 - [PID=9362] WebProcessProxy::processWillShutDown:
default	08:31:12.895268-0700	MobileSafari	0x1150c5180 - ProcessAssertion::acquireSync Trying to take RBS assertion 'XPCConnectionTerminationWatchdog' for process with PID=9362
default	08:31:12.895602-0700	runningboardd	Acquiring assertion targeting [xpcservice<com.apple.WebKit.WebContent([app<com.apple.mobilesafari((null))>:1565])>:9362](WebProcess9362) from originator [app<com.apple.mobilesafari((null))>:1565] with description <RBSAssertionDescriptor| "Browser Engine helper assertion targeting pid 9362" ID:611-1565-27913 target:9362<WebProcess9362> attributes:[
	<RBSDomainAttribute| domain:"com.apple.webkit" name:"Background" sourceEnvironment:"(null)">
	]>
default	08:31:12.895291-0700	MobileSafari	0x115018d08 - [PID=9362] ProcessThrottler::didDisconnectFromProcess:
default	08:31:12.895672-0700	runningboardd	Failed to get cs_flags, error=3
default	08:31:12.895303-0700	MobileSafari	0x1150c4c40 - ~ProcessAssertion: Releasing process assertion 'WebProcess Foreground Assertion' for process with PID=9362
default	08:31:12.895723-0700	runningboardd	SecTaskLoadEntitlements failed error=3 cs_flags=ffffffff, pid=9362
default	08:31:12.895850-0700	runningboardd	SecTaskCopyDebugDescription: com.apple.WebKit[9362]/0#-1 LF=3
default	08:31:12.895906-0700	runningboardd	Failed to get cs_flags, error=3
default	08:31:12.895952-0700	runningboardd	SecTaskLoadEntitlements failed error=3 cs_flags=ffffffff, pid=9362
default	08:31:12.896090-0700	runningboardd	SecTaskCopyDebugDescription: com.apple.WebKit[9362]/0#-1 LF=3
default	08:31:12.896178-0700	runningboardd	Failed to get cs_flags, error=3
default	08:31:12.896245-0700	runningboardd	SecTaskLoadEntitlements failed error=3 cs_flags=ffffffff, pid=9362
default	08:31:12.896332-0700	runningboardd	SecTaskCopyDebugDescription: com.apple.WebKit[9362]/0#-1 LF=3
default	08:31:12.896409-0700	runningboardd	Failed to get cs_flags, error=3

[Alexey Proskuryakov]

Maybe this has something to do with bug 271664 and using a hardened runtime for the extension (thus unable to use locally built WebKit), but that's a long shot - I don't see log messages that I'd expect in that case.

[Radar WebKit Bug Importer]

<rdar://problem/126137753>

[Per Arne Vollan]

*** Bug 271664 has been marked as a duplicate of this bug. ***

[Per Arne Vollan]

Pull request: https://github.com/WebKit/WebKit/pull/27080

[Alexey Proskuryakov]

*** This bug has been marked as a duplicate of bug 272400 ***