1439119 - e10s: Process handle leak

Status: RESOLVED INCOMPLETE

(Core :: General, defect)

Description

[Kacper Michajłow [:kasper93]]

STR:

1. Open more tabs to spawn additional Firefox child processes.
2. Close the tabs until at least one child process is closed.
3. One outstanding handle to every closed process will remain not closed.

I did a quick look at it and it seems that not closed handles originate from.

Handle = 0x0000000000001118 - OPEN
Thread ID = 0x00000000000040a0, Process ID = 0x000000000000363c

0x00007ff8642005f4: ntdll!NtDuplicateObject+0x0000000000000014
0x00007ff86066af7b: KERNELBASE!DuplicateHandle+0x000000000000004b
0x00007ff6b6d808f1: firefox!base::win::`anonymous namespace'::CheckAndDuplicateHandle+0x0000000000000055
0x00007ff6b6d8096b: firefox!base::win::ScopedProcessInformation::DuplicateFrom+0x000000000000001b
0x00007ff6b6d9a8ca: firefox!sandbox::TargetProcess::Create+0x00000000000001ea
0x00007ff6b6d8246b: firefox!sandbox::BrokerServicesBase::SpawnTarget+0x000000000000059b
0x00007ff808a5f2a7: xul!mozilla::SandboxBroker::LaunchApp+0x0000000000000303
0x00007ff808c90532: xul!mozilla::ipc::GeckoChildProcessHost::PerformAsyncLaunchInternal+0x00000000000007fe
0x00007ff808c8fcb2: xul!mozilla::ipc::GeckoChildProcessHost::PerformAsyncLaunch+0x000000000000028e
0x00007ff808c913af: xul!mozilla::ipc::GeckoChildProcessHost::RunPerformAsyncLaunch+0x000000000000003f
0x00007ff808c91125: +0x000000000000002d
0x00007ff807ec500b: xul!MessageLoop::DoWork+0x000000000000015f
0x00007ff80863a476: xul!base::MessagePumpForIO::DoRunLoop+0x000000000000001a
0x00007ff80863a44b: xul!base::MessagePumpWin::Run+0x000000000000003f

I don't have time today to look further so I figured I will create bug report so I won't forget to look at it later.

Comment 1

[Andrei Purice]

Hey Kacper,
Does this issue still reproduce for you or should we close it?

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

In the process of migrating remaining bugs to the new severity system, the severity for this bug cannot be automatically determined. Please retriage this bug using the new severity system.

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

A needinfo is requested from the reporter, however, the reporter is inactive on Bugzilla. Closing the bug as incomplete.

For more information, please visit BugBot documentation.