tailscale/util
Nick Khyl f0db47338e
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cmd/tailscaled,util/syspolicy/source,util/winutil/gp: disallow acquiring the GP lock during service startup
In v1.78, we started acquiring the GP lock when reading policy settings. This led to a deadlock during
Tailscale installation via Group Policy Software Installation because the GP engine holds the write lock
for the duration of policy processing, which in turn waits for the installation to complete, which in turn
waits for the service to enter the running state.

In this PR, we prevent the acquisition of GP locks (aka EnterCriticalPolicySection) during service startup
and update the Windows Registry-based util/syspolicy/source.PlatformPolicyStore to handle this failure
gracefully. The GP lock is somewhat optional; it’s safe to read policy settings without it, but acquiring
the lock is recommended when reading multiple values to prevent the Group Policy engine from modifying
settings mid-read and to avoid inconsistent results.

Fixes #14416

Signed-off-by: Nick Khyl <nickk@tailscale.com>
2025-01-23 15:06:47 -06:00
..
cache util/cache: fix missing interface methods (#11275) 2024-02-27 23:03:49 -05:00
cibuild
clientmetric wgengine: instrument with usermetrics 2024-10-14 11:34:31 +02:00
cloudenv all: use math/rand/v2 more 2024-06-05 15:24:04 -07:00
cmpver util/cmpver: add Less/LessEq helper funcs 2024-03-05 16:57:04 +00:00
codegen util/codegen: treat unique.Handle as an opaque value type 2024-11-11 12:39:19 -08:00
cstruct all: use Go 1.21's binary.NativeEndian 2025-01-13 08:31:00 -08:00
ctxkey all: use reflect.TypeFor now available in Go 1.22 (#11078) 2024-02-08 17:34:22 -08:00
deephash util/deephash: fix test regression on 32-bit 2024-06-19 12:25:53 -07:00
dirwalk
dnsname util/dnsname: use vizerror for all errors 2024-12-12 10:29:36 -05:00
execqueue control/controlclient,util/execqueue: extract execqueue into a package 2024-01-18 12:08:13 -08:00
expvarx all: use Go 1.22 range-over-int 2024-04-16 15:32:38 -07:00
goroutines ipn/ipnlocal, util/goroutines: track goroutines for tests, shutdown 2025-01-06 12:35:44 -08:00
groupmember util/groupmember: fail earlier if group doesn't exist, use slices.Contains 2023-11-01 19:23:16 -07:00
hashx all: use Go 1.22 range-over-int 2024-04-16 15:32:38 -07:00
httphdr util/httphdr: add new package for parsing HTTP headers (#9797) 2023-10-13 15:38:22 -07:00
httpm util/httpm: don't run test if .git doesn't exist 2023-11-22 12:09:59 -05:00
jsonutil all: use Go 1.22 range-over-int 2024-04-16 15:32:38 -07:00
limiter all: add test for package comments, fix, add comments as needed 2024-07-10 09:57:00 -07:00
lineiter types/result, util/lineiter: add package for a result type, use it 2024-11-05 10:27:52 -08:00
lineread
linuxfw all: use Go 1.21's binary.NativeEndian 2025-01-13 08:31:00 -08:00
lru util/slicesx: add MapKeys and MapValues from golang.org/x/exp/maps 2025-01-03 10:48:31 -08:00
mak
multierr all: use Go 1.22 range-over-int 2024-04-16 15:32:38 -07:00
must
nocasemaps all: use Go 1.22 range-over-int 2024-04-16 15:32:38 -07:00
osdiag all: add test for package comments, fix, add comments as needed 2024-07-10 09:57:00 -07:00
osshare all: add test for package comments, fix, add comments as needed 2024-07-10 09:57:00 -07:00
osuser util/osuser: turn wasm check into a const expression 2024-07-29 19:39:55 -07:00
pidowner types/result, util/lineiter: add package for a result type, use it 2024-11-05 10:27:52 -08:00
pool util/pool: add package for storing and using a pool of items 2024-05-24 14:11:19 -04:00
precompress
progresstracking ipn/localapi: add support for multipart POST to file-put 2024-03-27 08:53:52 -05:00
quarantine
race all: use Go 1.22 range-over-int 2024-04-16 15:32:38 -07:00
racebuild
rands wgengine/magicsock: use math/rands/v2 2024-06-05 15:57:27 -07:00
reload all: use math/rand/v2 more 2024-06-05 15:24:04 -07:00
ringbuffer all: use Go 1.22 range-over-int 2024-04-16 15:32:38 -07:00
set all: use iterators over slice views more 2024-11-11 13:22:34 -08:00
singleflight util/singleflight: add DoChanContext 2024-06-10 18:38:27 -04:00
slicesx util/slicesx: add AppendNonzero 2025-01-22 10:20:56 -08:00
stringsx util/stringsx: add package for extra string functions, like CompareFold 2024-12-23 07:43:56 -08:00
syspolicy cmd/tailscaled,util/syspolicy/source,util/winutil/gp: disallow acquiring the GP lock during service startup 2025-01-23 15:06:47 -06:00
sysresources
systemd
testenv util/testenv: add new package to hold InTest 2023-08-08 19:51:44 -06:00
topk all: use Go 1.22 range-over-int 2024-04-16 15:32:38 -07:00
truncate util/truncate: support []byte as well (#11614) 2024-04-04 14:38:16 -07:00
usermetric cmd/checkmetrics: add command for checking metrics against kb 2024-12-02 10:30:46 +01:00
vizerror util/vizerror: add WrapWithMessage 2024-10-09 12:59:25 -05:00
winutil cmd/tailscaled,util/syspolicy/source,util/winutil/gp: disallow acquiring the GP lock during service startup 2025-01-23 15:06:47 -06:00
zstdframe all: use Go 1.22 range-over-int 2024-04-16 15:32:38 -07:00