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panic in Caddy plugin #433

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knadh opened this issue Jan 3, 2024 · 6 comments · Fixed by #434
Closed

panic in Caddy plugin #433

knadh opened this issue Jan 3, 2024 · 6 comments · Fixed by #434

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@knadh
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knadh commented Jan 3, 2024

Hi @darkweak. The following configuration runs fine and after an arbitrary time handling traffic, panics and crashes Caddy. I'm using the latest build created with xcaddy build --with github.com/darkweak/souin/plugins/caddy --with github.com/darkweak/souin

$ ./caddy --version
v2.7.6 h1:w0NymbG2m9PcvKWsrXO6EEkY9Ru4FJK8uQbYcev1p3A=
{
    order cache before rewrite
    cache {
        allowed_http_verbs GET
        ttl 86400s
        cache_name mysite
        badger {
            path /var/lib/caddy/cache
        }
        regex {
            exclude /tl/*
            exclude /atl/*
        }
    }
}

http://mysite.com {
    cache

    ### Static file downloads
    handle_path /files* {
        root * /home/site/www/files
        file_server
    }

    @r1 path_regexp params /old/path/(.*)/?
    redir @r1 /new/path/{re.params.1} permanent
    redir /open /p/open permanent
    redir /open/ /p/open permanent

    reverse_proxy /tl/* localhost:8123
    reverse_proxy /atl/* localhost:8123

    reverse_proxy localhost:9000

    encode gzip
    tls {
        on_demand
    }
}

fatal error: concurrent map writes
goroutine 11034729 [running]:
github.com/caddyserver/caddy/v2.(*Replacer).Set(...)
        github.com/caddyserver/caddy/v2@v2.7.6/replacer.go:68
github.com/caddyserver/caddy/v2/modules/caddyhttp/reverseproxy.(*Handler).ServeHTTP.func1()
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/reverseproxy/reverseproxy.go:433 +0x139
github.com/caddyserver/caddy/v2/modules/caddyhttp/reverseproxy.(*Handler).ServeHTTP(0xc00020cf00, {0x25ba230, 0xc01e9613b0}, 0xc0219fdd00, {0x25ab900, 0x22f9340})
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/reverseproxy/reverseproxy.go:454 +0x44c
github.com/caddyserver/caddy/v2/modules/caddyhttp.wrapMiddleware.func1.1({0x25ba230?, 0xc01e9613b0?}, 0x25ab900?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/routes.go:331 +0x3a
github.com/caddyserver/caddy/v2/modules/caddyhttp.HandlerFunc.ServeHTTP(0x25ab900?, {0x25ba230?, 0xc01e9613b0?}, 0xc00067f300?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/caddyhttp.go:58 +0x29
github.com/caddyserver/caddy/v2/modules/caddyhttp.RouteList.Compile.wrapRoute.func1.1({0x25ba230, 0xc01e9613b0}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/routes.go:300 +0x2c9
github.com/caddyserver/caddy/v2/modules/caddyhttp.HandlerFunc.ServeHTTP(0x25c08c0?, {0x25ba230?, 0xc01e9613b0?}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/caddyhttp.go:58 +0x29
github.com/caddyserver/caddy/v2/modules/caddyhttp.RouteList.Compile.wrapRoute.func1.1({0x25ba230, 0xc01e9613b0}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/routes.go:268 +0x264
github.com/caddyserver/caddy/v2/modules/caddyhttp.HandlerFunc.ServeHTTP(0x25c08c0?, {0x25ba230?, 0xc01e9613b0?}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/caddyhttp.go:58 +0x29
github.com/caddyserver/caddy/v2/modules/caddyhttp.RouteList.Compile.wrapRoute.func1.1({0x25ba230, 0xc01e9613b0}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/routes.go:268 +0x264
github.com/caddyserver/caddy/v2/modules/caddyhttp.HandlerFunc.ServeHTTP(0x25c08c0?, {0x25ba230?, 0xc01e9613b0?}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/caddyhttp.go:58 +0x29
github.com/caddyserver/caddy/v2/modules/caddyhttp.RouteList.Compile.wrapRoute.func1.1({0x25ba230, 0xc01e9613b0}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/routes.go:268 +0x264
github.com/caddyserver/caddy/v2/modules/caddyhttp.HandlerFunc.ServeHTTP(0x25c08c0?, {0x25ba230?, 0xc01e9613b0?}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/caddyhttp.go:58 +0x29
github.com/caddyserver/caddy/v2/modules/caddyhttp.RouteList.Compile.wrapRoute.func1.1({0x25ba230, 0xc01e9613b0}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/routes.go:268 +0x264
github.com/caddyserver/caddy/v2/modules/caddyhttp.HandlerFunc.ServeHTTP(0x25c08c0?, {0x25ba230?, 0xc01e9613b0?}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/caddyhttp.go:58 +0x29
github.com/caddyserver/caddy/v2/modules/caddyhttp.RouteList.Compile.wrapRoute.func1.1({0x25ba230, 0xc01e9613b0}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/routes.go:268 +0x264
github.com/caddyserver/caddy/v2/modules/caddyhttp.HandlerFunc.ServeHTTP(0x25c08c0?, {0x25ba230?, 0xc01e9613b0?}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/caddyhttp.go:58 +0x29
github.com/caddyserver/caddy/v2/modules/caddyhttp.RouteList.Compile.wrapRoute.func1.1({0x25ba230, 0xc01e9613b0}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/routes.go:268 +0x264
github.com/caddyserver/caddy/v2/modules/caddyhttp.HandlerFunc.ServeHTTP(0x25c08c0?, {0x25ba230?, 0xc01e9613b0?}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/caddyhttp.go:58 +0x29
github.com/caddyserver/caddy/v2/modules/caddyhttp.RouteList.Compile.wrapRoute.func1.1({0x25ba230, 0xc01e9613b0}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/routes.go:268 +0x264
github.com/caddyserver/caddy/v2/modules/caddyhttp.HandlerFunc.ServeHTTP(0x25c08c0?, {0x25ba230?, 0xc01e9613b0?}, 0xe?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/caddyhttp.go:58 +0x29
github.com/caddyserver/caddy/v2/modules/caddyhttp.RouteList.Compile.wrapRoute.func1.1({0x25ba230, 0xc01e9613b0}, 0xc01e061040?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/routes.go:268 +0x264
github.com/caddyserver/caddy/v2/modules/caddyhttp.HandlerFunc.ServeHTTP(0xc02106e410?, {0x25ba230?, 0xc01e9613b0?}, 0x4?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/caddyhttp.go:58 +0x29
github.com/caddyserver/caddy/v2/modules/caddyhttp/encode.(*Encode).ServeHTTP(0xc00036a180, {0x25b9c80, 0xc0203e6940}, 0xc0219fdd00, {0x25ab900, 0xc01b19d020})
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/encode/encode.go:138 +0x283
github.com/caddyserver/caddy/v2/modules/caddyhttp.wrapMiddleware.func1.1({0x25b9c80?, 0xc0203e6940?}, 0x0?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/routes.go:331 +0x3a
github.com/caddyserver/caddy/v2/modules/caddyhttp.HandlerFunc.ServeHTTP(0x82?, {0x25b9c80?, 0xc0203e6940?}, 0xc01ee4aa70?)
        github.com/caddyserver/caddy/v2@v2.7.6/modules/caddyhttp/caddyhttp.go:58 +0x29
github.com/darkweak/souin/plugins/caddy.(*SouinCaddyMiddleware).ServeHTTP.func1({0x25b9c80?, 0xc0203e6940?}, 0x4e61c5?)
        github.com/darkweak/souin/plugins/caddy@v0.0.0-20231130105936-40a16bffcd67/httpcache.go:85 +0x33
github.com/darkweak/souin/pkg/middleware.(*SouinBaseHandler).Upstream.func1()
        github.com/darkweak/souin@v1.6.44/pkg/middleware/middleware.go:300 +0x7f
golang.org/x/sync/singleflight.(*Group).doCall.func2(0xc017dc3cc6, 0xc01e961360, 0x7fc8ebf965b8?)
        golang.org/x/sync@v0.5.0/singleflight/singleflight.go:198 +0x64
golang.org/x/sync/singleflight.(*Group).doCall(0x1d47580?, 0xc00055c7e0?, {0xc01bf79180?, 0x35?}, 0x40e65a?)
        golang.org/x/sync@v0.5.0/singleflight/singleflight.go:200 +0x96
golang.org/x/sync/singleflight.(*Group).Do(0xc0006b4138, {0xc01bf79180, 0x35}, 0x15?)
        golang.org/x/sync@v0.5.0/singleflight/singleflight.go:113 +0x15a
github.com/darkweak/souin/pkg/middleware.(*SouinBaseHandler).Upstream(0xc0006b4000, 0xc0203e6940, 0xc0214a2500, 0xc01b19d1a0, 0xc015b15230, {0xc01bf79180, 0x35})
        github.com/darkweak/souin@v1.6.44/pkg/middleware/middleware.go:298 +0x246
github.com/darkweak/souin/pkg/middleware.(*SouinBaseHandler).ServeHTTP.func4()
        github.com/darkweak/souin@v1.6.44/pkg/middleware/middleware.go:623 +0x38
created by github.com/darkweak/souin/pkg/middleware.(*SouinBaseHandler).ServeHTTP in goroutine 11034627
        github.com/darkweak/souin@v1.6.44/pkg/middleware/middleware.go:622 +0x114d
goroutine 1 [select (no cases), 397 minutes]:
github.com/caddyserver/caddy/v2/cmd.cmdRun({0x0?})
        github.com/caddyserver/caddy/v2@v2.7.6/cmd/commandfuncs.go:283 +0xc18
github.com/caddyserver/caddy/v2/cmd.init.1.func2.WrapCommandFuncForCobra.func1(0xc000005500, {0x20635a8?, 0x4?, 0x2063584?})
        github.com/caddyserver/caddy/v2@v2.7.6/cmd/cobra.go:137 +0x2f
github.com/spf13/cobra.(*Command).execute(0xc000005500, {0xc000559350, 0x3, 0x3})
        github.com/spf13/cobra@v1.7.0/command.go:940 +0x87c
github.com/spf13/cobra.(*Command).ExecuteC(0x3667120)
        github.com/spf13/cobra@v1.7.0/command.go:1068 +0x3a5
github.com/spf13/cobra.(*Command).Execute(...)
        github.com/spf13/cobra@v1.7.0/command.go:992
github.com/caddyserver/caddy/v2/cmd.Main()
        github.com/caddyserver/caddy/v2@v2.7.6/cmd/main.go:66 +0x5b
main.main()
        caddy/main.go:12 +0xf
goroutine 8 [select]:
github.com/golang/glog.(*fileSink).flushDaemon(0x3689038)
        github.com/golang/glog@v1.1.2/glog_file.go:351 +0xb9
created by github.com/golang/glog.init.1 in goroutine 1
        github.com/golang/glog@v1.1.2/glog_file.go:166 +0x135
goroutine 13 [select, 397 minutes]:
github.com/caddyserver/certmagic.(*RingBufferRateLimiter).permit(0xc000142500)
        github.com/caddyserver/certmagic@v0.20.0/ratelimiter.go:217 +0x86
github.com/caddyserver/certmagic.(*RingBufferRateLimiter).loop(0xc000142500)
        github.com/caddyserver/certmagic@v0.20.0/ratelimiter.go:89 +0x8b
created by github.com/caddyserver/certmagic.NewRateLimiter in goroutine 1
        github.com/caddyserver/certmagic@v0.20.0/ratelimiter.go:45 +0x13c
goroutine 14 [chan receive, 397 minutes]:
github.com/caddyserver/caddy/v2.trapSignalsCrossPlatform.func1()
        github.com/caddyserver/caddy/v2@v2.7.6/sigtrap.go:43 +0xd8
created by github.com/caddyserver/caddy/v2.trapSignalsCrossPlatform in goroutine 1
        github.com/caddyserver/caddy/v2@v2.7.6/sigtrap.go:38 +0x1a
goroutine 15 [chan receive, 397 minutes]:
github.com/caddyserver/caddy/v2.trapSignalsPosix.func1()
        github.com/caddyserver/caddy/v2@v2.7.6/sigtrap_posix.go:35 +0xfa
created by github.com/caddyserver/caddy/v2.trapSignalsPosix in goroutine 1
        github.com/caddyserver/caddy/v2@v2.7.6/sigtrap_posix.go:31 +0x1a
goroutine 19 [syscall, 397 minutes]:
os/signal.signal_recv()
        runtime/sigqueue.go:152 +0x29
os/signal.loop()
        os/signal/signal_unix.go:23 +0x13
created by os/signal.Notify.func1.1 in goroutine 14
        os/signal/signal.go:151 +0x1f
goroutine 20 [select]:
github.com/dgraph-io/badger/v3.(*DB).updateSize(0xc00070cd80, 0xc0005420f0)
        github.com/dgraph-io/badger/v3@v3.2103.5/db.go:1171 +0x145
created by github.com/dgraph-io/badger/v3.Open in goroutine 1
        github.com/dgraph-io/badger/v3@v3.2103.5/db.go:331 +0xe56
goroutine 36 [IO wait, 397 minutes]:
internal/poll.runtime_pollWait(0x7fc8a53c5f10, 0x72)
        runtime/netpoll.go:343 +0x85
internal/poll.(*pollDesc).wait(0xc000634b00?, 0x4161e5?, 0x0)
        internal/poll/fd_poll_runtime.go:84 +0x27
internal/poll.(*pollDesc).waitRead(...)
        internal/poll/fd_poll_runtime.go:89
internal/poll.(*FD).Accept(0xc000634b00)
        internal/poll/fd_unix.go:611 +0x2ac
net.(*netFD).accept(0xc000634b00)
        net/fd_unix.go:172 +0x29
net.(*TCPListener).accept(0xc00053d8e0)
        net/tcpsock_posix.go:152 +0x1e
net.(*TCPListener).Accept(0xc00053d8e0)
        net/tcpsock.go:315 +0x30
net/http.(*Server).Serve(0xc000364960, {0x7fc8a5131258, 0xc00053d900})
        net/http/server.go:3056 +0x364
github.com/caddyserver/caddy/v2.replaceLocalAdminServer.func2()
        github.com/caddyserver/caddy/v2@v2.7.6/admin.go:449 +0xc8
created by github.com/caddyserver/caddy/v2.replaceLocalAdminServer in goroutine 1
        github.com/caddyserver/caddy/v2@v2.7.6/admin.go:445 +0x4a6
goroutine 37 [select, 9 minutes]:
github.com/caddyserver/certmagic.(*Cache).maintainAssets(0xc000634b80, 0x0)
        github.com/caddyserver/certmagic@v0.20.0/maintain.go:69 +0x305
created by github.com/caddyserver/certmagic.NewCache in goroutine 1
        github.com/caddyserver/certmagic@v0.20.0/cache.go:127 +0x1f6
goroutine 38 [select]:
github.com/dgraph-io/badger/v3/y.(*WaterMark).process(0xc00056a2d0, 0xc00056a2a0)
        github.com/dgraph-io/badger/v3@v3.2103.5/y/watermark.go:214 +0x285
created by github.com/dgraph-io/badger/v3/y.(*WaterMark).Init in goroutine 1
        github.com/dgraph-io/badger/v3@v3.2103.5/y/watermark.go:72 +0xa7
goroutine 39 [select]:
github.com/dgraph-io/badger/v3/y.(*WaterMark).process(0xc00056a300, 0xc00056a2a0)
        github.com/dgraph-io/badger/v3@v3.2103.5/y/watermark.go:214 +0x285
created by github.com/dgraph-io/badger/v3/y.(*WaterMark).Init in goroutine 1
        github.com/dgraph-io/badger/v3@v3.2103.5/y/watermark.go:72 +0xa7
goroutine 40 [select]:
github.com/dgraph-io/ristretto/z.(*AllocatorPool).freeupAllocators(0xc000028120)
        github.com/dgraph-io/ristretto@v0.1.1/z/allocator.go:385 +0x11f
created by github.com/dgraph-io/ristretto/z.NewAllocatorPool in goroutine 1
        github.com/dgraph-io/ristretto@v0.1.1/z/allocator.go:324 +0xb9
goroutine 41 [select, 397 minutes]:
github.com/dgraph-io/ristretto.(*defaultPolicy).processItems(0xc00035e1c0)
        github.com/dgraph-io/ristretto@v0.1.1/policy.go:102 +0x85
created by github.com/dgraph-io/ristretto.newDefaultPolicy in goroutine 1
        github.com/dgraph-io/ristretto@v0.1.1/policy.go:86 +0x139
goroutine 42 [select]:
github.com/dgraph-io/ristretto.(*Cache).processItems(0xc000700b80)
        github.com/dgraph-io/ristretto@v0.1.1/cache.go:452 +0x149
created by github.com/dgraph-io/ristretto.NewCache in goroutine 1
        github.com/dgraph-io/ristretto@v0.1.1/cache.go:207 +0x645
goroutine 43 [select]:
github.com/dgraph-io/badger/v3.(*DB).monitorCache(0xc00070cd80, 0xc000519b90)
        github.com/dgraph-io/badger/v3@v3.2103.5/db.go:469 +0x170
created by github.com/dgraph-io/badger/v3.Open in goroutine 1
        github.com/dgraph-io/badger/v3@v3.2103.5/db.go:311 +0xc49
goroutine 44 [select]:
github.com/dgraph-io/badger/v3.(*levelsController).runCompactor(0xc00027e5b0, 0x0, 0xc000519bc0)
        github.com/dgraph-io/badger/v3@v3.2103.5/levels.go:508 +0x2e9
created by github.com/dgraph-io/badger/v3.(*levelsController).startCompact in goroutine 1
        github.com/dgraph-io/badger/v3@v3.2103.5/levels.go:354 +0x4b
goroutine 45 [select]:
github.com/dgraph-io/badger/v3.(*levelsController).runCompactor(0xc00027e5b0, 0x1, 0xc000519bc0)
        github.com/dgraph-io/badger/v3@v3.2103.5/levels.go:508 +0x2e9
created by github.com/dgraph-io/badger/v3.(*levelsController).startCompact in goroutine 1
        github.com/dgraph-io/badger/v3@v3.2103.5/levels.go:354 +0x4b
goroutine 46 [select]:
github.com/dgraph-io/badger/v3.(*levelsController).runCompactor(0xc00027e5b0, 0x2, 0xc000519bc0)
        github.com/dgraph-io/badger/v3@v3.2103.5/levels.go:508 +0x2e9
created by github.com/dgraph-io/badger/v3.(*levelsController).startCompact in goroutine 1
        github.com/dgraph-io/badger/v3@v3.2103.5/levels.go:354 +0x4b
goroutine 47 [select]:
github.com/dgraph-io/badger/v3.(*levelsController).runCompactor(0xc00027e5b0, 0x3, 0xc000519bc0)
        github.com/dgraph-io/badger/v3@v3.2103.5/levels.go:508 +0x2e9
created by github.com/dgraph-io/badger/v3.(*levelsController).startCompact in goroutine 1
        github.com/dgraph-io/badger/v3@v3.2103.5/levels.go:354 +0x4b
goroutine 48 [chan receive, 397 minutes]:
github.com/dgraph-io/badger/v3.(*DB).flushMemtable(0xc00070cd80, 0xc00056a2a0?)
        github.com/dgraph-io/badger/v3@v3.2103.5/db.go:1078 +0xa5
github.com/dgraph-io/badger/v3.Open.func5()
....
@darkweak
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darkweak commented Jan 3, 2024

Hi @knadh thank you for your issue. The panic comes from the singleflight package, I have to check why that happens, which "map" is concurrently accessed/written. That's a high priority bugfix.

It would be great to have a reproducible test case 🙂

@knadh
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knadh commented Jan 3, 2024 •
edited
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This is from a site that receives few a thousand requests per minute. Have been unable to pinpoint what triggers this, unfortunately. Sometimes it's a few seconds between crashes, sometimes it's half an hour. I've disabled caching altogether.

@darkweak
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darkweak commented Jan 3, 2024

I will use the stress tests to debug that then.

@darkweak darkweak mentioned this issue Jan 4, 2024
Merged
@adammakowskidev
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adammakowskidev commented Jan 4, 2024 •
edited
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@knadh
try changing to nutsdb or redis, crash caddy should not occur. I tested under heavy load.

With this config

cache {
        nuts {
            path /tmp/nuts-path
        }
    }

@rask
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rask commented Jun 12, 2024

I saw similar errors relating to souin and singleflight just now, and this crashed my Caddy. Small site, literally mostly just me browsing it while developing and writing. I'll keep monitoring in case this crash pops up again.

@darkweak
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@rask can you open a new issue with the logs you got and some context please? 🙏

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fix(chore): race condition and panic in singleflight process darkweak/souin
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@rask @knadh @darkweak @adammakowskidev