HAProxy known bugs for version v2.9.4 (maintenance branch 2.9) :  177 

This version (2.9.4) is a release belonging to maintenance branch 2.9 whose latest version is 2.9.9. If your version is not the last one in the maintenance branch, you are missing fixes for known bugs, and by not updating you are needlessly taking the responsibility for the risk of unexpected service outages and exposing your web site to possible security issues.

The HAProxy development team takes a great care of maintaining stable versions so that all users can apply bug fixes without having to take the risk of upgrading to a new branch. In turn users are expected to apply the fixes when the development team estimates that they were worth being backported to stable branches.

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Other versions in the same branch

This branch contains the following releases :

2024-06-142.9.9 ⇐ last
2024-01-312.9.4 ⇐ yours

Known bugs affecting this version, and already fixed in the maintenance branch

These fixes have already been queued for a more recent 2.9 version. Some of them might have already been released in a more recent version than yours, and other ones might still be pending in the maintenance branch for a future release. The list may be empty if you're already on the latest version and no new fix was backported.

Bugs are almost always tagged with a severity (some people forget the severity tag when the bug is minor). The following severities are used :

Total known bugs in this version by category :

177 0 11 60 106

Click on the subjects below to get the full description of the bug :

Merge dateSubject - Severity (minor, medium, major, critical)
2024-07-03BUG/MEDIUM: quic: fix possible exit from qc_check_dcid() without unlocking
2024-07-03BUG/MINOR: quic: fix race-condition on trace for CID retrieval
2024-07-03BUG/MINOR: quic: fix race condition in qc_check_dcid()
2024-07-03BUG/MEDIUM: quic: fix race-condition in quic_get_cid_tid()
2024-07-03BUG/MEDIUM: h3: ensure the ":scheme" pseudo header is totally valid
2024-07-03BUG/MEDIUM: h3: ensure the ":method" pseudo header is totally valid
2024-07-02BUG/MEDIUM: stick-table: Decrement the ref count inside lock to kill a session
2024-07-02BUG/MINOR: hlua: report proper context upon error in hlua_cli_io_handler_fct()
2024-07-02BUG/MINOR: quic: fix BUG_ON() on Tx pkt alloc failure
2024-07-02BUG/MINOR: mux-quic: fix crash on qcs SD alloc failure
2024-07-02BUG/MINOR: h3: fix crash on STOP_SENDING receive after GOAWAY emission
2024-07-02BUG/MEDIUM: proxy: fix email-alert invalid free
2024-06-14BUG/MAJOR: mux-h1: Prevent any UAF on H1 connection after draining a request
2024-06-14BUG/MINOR: proxy: fix header_unique_id leak on deinit()
2024-06-14BUG/MINOR: proxy: fix source interface and usesrc leaks on deinit()
2024-06-14BUG/MINOR: proxy: fix dyncookie_key leak on deinit()
2024-06-14BUG/MINOR: proxy: fix check_{command,path} leak on deinit()
2024-06-14BUG/MINOR: proxy: fix email-alert leak on deinit()
2024-06-14BUG/MINOR: proxy: fix log_tag leak on deinit()
2024-06-14BUG/MINOR: proxy: fix server_id_hdr_name leak on deinit()
2024-06-14BUG/MINOR: quic: fix computed length of emitted STREAM frames
2024-06-11BUG/MEDIUM: ssl: bad auth selection with TLS1.2 and WolfSSL
2024-06-06BUG/MEDIUM: stick-tables: Fix locking of updt_lock when trashing oldest entries
2024-06-06BUG/MEDIUM: ssl: wrong priority whem limiting ECDSA ciphers in ECDSA+RSA configuration
2024-06-06BUG/MINOR: hlua: fix leak in hlua_ckch_set() error path
2024-06-06BUG/MINOR: hlua: prevent LJMP in hlua_traceback()
2024-06-06BUG/MINOR: hlua: fix unsafe hlua_pusherror() usage
2024-06-06BUG/MINOR: hlua: don't use lua_pushfstring() when we don't expect LJMP
2024-06-06BUG/MINOR: quic: prevent crash on qc_kill_conn()
2024-06-06BUG/MEDIUM: h1-htx: Don't state interim responses are bodyless
2024-06-06BUG/MINOR: hlua: use CertCache.set() from various hlua contexts
2024-06-06BUG/MINOR: tools: fix possible null-deref in env_expand() on out-of-memory
2024-06-06BUG/MINOR: tcpcheck: report correct error in tcp-check rule parser
2024-06-06BUG/MINOR: cfgparse: remove the correct option on httpcheck send-state warning
2024-06-06BUG/MINOR: activity: fix Delta_calls and Delta_bytes count
2024-06-06BUG/MINOR: ssl/ocsp: init callback func ptr as NULL
2024-06-06BUG/MINOR: server: Don't reset resolver options on a new default-server line
2024-06-06BUG/MINOR: http-htx: Support default path during scheme based normalization
2024-06-06BUG/MINOR: quic: adjust restriction for stateless reset emission
2024-06-06BUG/MEDIUM: stick-tables: make sure never to create two same remote entries
2024-06-06BUG/MEDIUM: stick-tables: Fix race with peers when killing a sticky session
2024-06-06BUG/MEDIUM: stick-tables: Fix race with peers when trashing oldest entries
2024-06-06BUG/MEDIUM: mux-quic: Create sedesc in same time of the QUIC stream
2024-06-06BUG/MEDIUM: quic_tls: prevent LibreSSL < 4.0 from negotiating CHACHA20_POLY1305
2024-06-06BUG/MAJOR: quic: Crash with TLS_AES_128_CCM_SHA256 (libressl only)
2024-06-06BUG/MINOR: rhttp: fix task_wakeup state
2024-06-06BUG/MINOR: rhttp: prevent listener suspend
2024-06-06BUG/MEDIUM: rhttp: fix preconnect on single-thread
2024-06-06BUG/MINOR: server: free PROXY v2 TLVs on srv drop
2024-06-06BUG/MINOR: connection: parse PROXY TLV for LOCAL mode
2024-06-06BUG/MINOR: http-ana: Don't crush stream termination condition on internal error
2024-06-06BUG/MINOR: stats: Don't state the 303 redirect response is chunked
2024-06-06BUG/MEDIUM: fd: prevent memory waste in fdtab array
2024-06-06BUG/MEDIUM: h1: Reject CONNECT request if the target has a scheme
2024-06-06BUG/MINOR: h1: Check authority for non-CONNECT methods only if a scheme is found
2024-06-06BUG/MEDIUM: stick-tables: properly mark stktable_data as packed
2024-06-06BUG/MEDIUM: htx: mark htx_sl as packed since it may be realigned
2024-06-06BUG/MINOR: qpack: fix error code reported on QPACK decoding failure
2024-06-06BUG/MINOR: mux-quic: fix error code on shutdown for non HTTP/3
2024-06-06BUG/MINOR: log: smp_rgs array issues with inherited global log directives
2024-06-06BUG/MINOR: cfgparse: use curproxy global var from config post validation
2024-06-06BUG/MINOR: acl: support built-in ACLs with acl() sample
2024-06-06BUG/MINOR: haproxy: only tid 0 must not sleep if got signal
2024-06-06BUG/MINOR: mworker: reintroduce way to disable seamless reload with -x /dev/null
2024-06-06BUG/MINOR: h1: fix detection of upper bytes in the URI
2024-06-06BUG/MINOR: backend: use cum_sess counters instead of cum_conn
2024-06-06BUG/MINOR: fd: my_closefrom() on Linux could skip contiguous series of sockets
2024-06-06BUG/MINOR: sock: handle a weird condition with connect()
2024-06-06BUG/MINOR: stconn: Fix sc_mux_strm() return value
2024-04-29BUG/MEDIUM: cache: Vary not working properly on anything other than accept-encoding
2024-04-18BUG/MINOR: server: fix slowstart behavior
2024-04-18BUG/MEDIUM: peers: Fix exit condition when max-updates-at-once is reached
2024-04-18BUG/MEDIUM: spoe: Always retry when an applet fails to send a frame
2024-04-18BUG/MEDIUM: applet: Fix applet API to put input data in a buffer
2024-04-18BUG/MEDIUM: evports: do not clear returned events list on signal
2024-04-18BUG/MEDIUM: stconn: Don't forward channel data if input data must be filtered
2024-04-18BUG/MEDIUM: grpc: Fix several unaligned 32/64 bits accesses
2024-04-18BUG/MAJOR: stick-tables: fix race with peers in entry expiration
2024-04-18BUG/MEDIUM: peers/trace: fix crash when listing event types
2024-04-18BUG/MINOR: debug: make sure DEBUG_STRICT=0 does work as documented
2024-04-18BUG/MINOR: http-ana: Fix TX_L7_RETRY and TX_D_L7_RETRY values
2024-04-18BUG/MEDIUM: http-ana: Deliver 502 on keep-alive for fressh server connection
2024-04-18BUG/MINOR: log: invalid snprintf() usage in sess_build_logline()
2024-04-18BUG/MINOR: tools/log: invalid encode_{chunk,string} usage
2024-04-18BUG/MINOR: log: fix lf_text_len() truncate inconsistency
2024-04-18BUG/MINOR: listener: always assign distinct IDs to shards
2024-04-18BUG/MEDIUM: quic: don't blindly rely on unaligned accesses
2024-04-08BUG/MINOR: cli: Report an error to user if command or payload is too big
2024-04-08BUG/MAJOR: connection: fix server used_conns with H2 + reuse safe
2024-04-08BUG/MEDIUM: http_ana: ignore NTLM for reuse aggressive/always and no H1
2024-04-08BUG/MAJOR: server: do not delete srv referenced by session
2024-04-08BUG/MEDIUM: ssl: Fix crash when calling "update ssl ocsp-response" when an update is ongoing
2024-04-08BUG/MAJOR: ocsp: Separate refcount per instance and per store
2024-04-08BUG/MEDIUM: quic: fix connection freeze on post handshake
2024-04-08BUG/MEDIUM: server: fix dynamic servers initial settings
2024-04-05BUG/MINOR: init: relax LSTCHK_NETADM checks for non root
2024-04-05BUG/MINOR: proxy: fix logformat expression leak in use_backend rules
2024-04-03BUG/MEDIUM: stick-table: use the update lock when reading tables from peers
2024-04-03BUG/MEDIUM: stconn: Don't forward shutdown to SE if iobuf is not empty
2024-04-03BUG/MINOR: backend: properly handle redispatch 0
2024-04-03BUG/MEDIUM: stick-tables: fix a small remaining race in expiration task
2024-04-03BUG/MINOR: log/balance: detect if user tries to use unsupported algo
2024-03-29BUG/MINOR: server: ignore 'enabled' for dynamic servers
2024-03-29BUG/MINOR: server: fix persistence cookie for dynamic servers
2024-03-29BUG/MINOR: ssl: Detect more 'ocsp-update' incompatibilities
2024-03-29BUG/MINOR: ssl: Wrong ocsp-update "incompatibility" error message
2024-03-26BUG/MINOR: server: 'source' interface ignored from 'default-server' directive
2024-03-26BUG/MEDIUM: mux-fcgi: Properly handle EOM flag on end-of-trailers HTX block
2024-03-26BUG/MINOR: mux-quic: close all QCS before freeing QCC tasklet
2024-03-26BUG/MEDIUM: ssl: Fix crash in ocsp-update log function
2024-03-26BUG/MINOR: session: ensure conn owner is set after insert into session
2024-03-26BUG/MEDIUM: spoe: Return an invalid frame on recv if size is too small
2024-03-26BUG/MINOR: spoe: Be sure to be able to quickly close IDLE applets on soft-stop
2024-03-26BUG/MEDIUM: spoe: Don't rely on stream's expiration to detect processing timeout
2024-03-26BUG/MINOR: listener: Don't schedule frontend without task in listener_release()
2024-03-26BUG/MINOR: listener: Wake proxy's mngmt task up if necessary on session release
2024-03-26BUG/MEDIUM: hlua: streams don't support mixing lua-load with lua-load-per-thread (2nd try)
2024-03-26DEBUG: lua: precisely identify if stream is stuck inside lua or not
2024-03-26BUG/MINOR: hlua: fix missing lock in hlua_filter_delete()
2024-03-26BUG/MINOR: hlua: missing lock in hlua_filter_new()
2024-03-26BUG/MINOR: hlua: segfault when loading the same filter from different contexts
2024-03-26CI: github: add -DDEBUG_LIST to the default builds
2024-03-26BUG/MINOR: ssl: fix possible ctx memory leak in sample_conv_aes_gcm()
2024-03-26BUG/MEDIUM: quic: fix handshake freeze under high traffic
2024-03-26BUG/MINOR: cfgparse: report proper location for log-format-sd errors
2024-03-26BUG/MINOR: ssl/cli: typo in new ssl crl-file CLI description
2024-03-26BUG/MINOR: sink: fix a race condition in the TCP log forwarding code
2024-03-26BUG/MINOR: hlua: don't call ha_alert() in hlua_event_subscribe()
2024-03-26BUG/MAJOR: hlua: improper lock usage with hlua_ctx_resume()
2024-03-26BUG/MEDIUM: hlua: improper lock usage with SET_SAFE_LJMP()
2024-03-26BUG/MINOR: hlua: improper lock usage in hlua_filter_new()
2024-03-26BUG/MINOR: hlua: improper lock usage in hlua_filter_callback()
2024-03-26BUG/MINOR: hlua: fix possible crash in hlua_filter_new() under load
2024-03-26BUG/MINOR: hlua: don't use lua_tostring() from unprotected contexts
2024-03-26BUG/MINOR: hlua: fix unsafe lua_tostring() usage with empty stack
2024-03-26BUG/MINOR: tools: seed the statistical PRNG slightly better
2024-03-26BUG/MINOR: hlua: Fix log level to the right value when set via TXN:set_loglevel
2024-03-26BUG/MINOR: config/quic: Alert about PROXY protocol use on a QUIC listener
2024-03-26BUG/MINOR: mux-h1: Properly report when mux is blocked during a nego
2024-03-26BUG/MINOR: ssl/cli: duplicate cleaning code in cli_parse_del_crtlist
2024-03-26BUG/MINOR: ist: only store NUL byte on succeeded alloc
2024-03-26BUG/MINOR: quic: fix output of show quic
2024-03-26BUG/MEDIUM: cli: Warn if pipelined commands are delimited by a \n
2024-03-26BUG/MAJOR: server: fix stream crash due to deleted server
2024-03-26BUG/MINOR: stats: drop srv refcount on early release
2024-03-26BUG/MINOR: ist: allocate nul byte on istdup
2024-03-26BUG/MEDIUM: quic: fix transient send error with listener socket
2024-03-26BUG/MEDIUM: hlua: Don't loop if a lua socket does not consume received data
2024-03-26BUG/MEDIUM: hlua: Be able to garbage collect uninitialized lua sockets
2024-03-26BUG/MEDIUM: applet: Immediately free appctx on early error
2024-03-26BUG/MINOR: qpack: reject invalid dynamic table capacity
2024-03-26BUG/MINOR: qpack: reject invalid increment count decoding
2024-03-26BUG/MINOR: quic: reject HANDSHAKE_DONE as server
2024-03-26BUG/MINOR: quic: reject unknown frame type
2024-03-12BUG/MINOR: mux-h2: count rejected DATA frames against the connection's flow control
2024-02-26BUG/MAJOR: ssl/ocsp: crash with ocsp when old process exit or using ocsp CLI
2024-02-22BUG/MAJOR: promex: fix crash on deleted server
2024-02-15BUG/MEDIUM: mux-h2: Don't report error on SE for closed H2 streams
2024-02-15BUG/MEDIUM: mux-h2: Don't report error on SE if error is only pending on H2C
2024-02-15BUG/MEDIUM: mux-h2: Only Report H2C error on read error if demux buffer is empty
2024-02-15BUG/MEDIUM: mux-h2: Switch pending error to error if demux buffer is empty
2024-02-14BUG/MAJOR: stconn: Check support for zero-copy forwarding on both sides
2024-02-14BUG/MEDIUM: stconn: Don't check pending shutdown to wake an applet up
2024-02-14BUG/MEDIUM: stconn: Allow expiration update when READ/WRITE event is pending
2024-02-14BUG/MEDIUM: quic: Wrong K CUBIC calculation.
2024-02-14BUG/MEDIUM: ssl: Fix crash when calling "update ssl ocsp-response" when an update is ongoing
2024-02-14BUG/MEDIUM: pool: fix rare risk of deadlock in pool_flush()
2024-02-14BUG/MEDIUM: cli: fix once for all the problem of missing trailing LFs
2024-02-14BUG/MINOR: vars/cli: fix missing LF after "get var" output
2024-02-14BUG/MINOR: ssl: Reenable ocsp auto-update after an "add ssl crt-list"
2024-02-14BUG/MINOR: ssl: Destroy ckch instances before the store during deinit
2024-02-14BUG/MEDIUM: ocsp: Separate refcount per instance and per store
2024-02-14BUG/MINOR: ssl: Clear the ckch instance when deleting a crt-list line
2024-02-14BUG/MINOR: ssl: Duplicate ocsp update mode when dup'ing ckch
2024-02-07MINOR: debug: make BUG_ON() catch build errors even without DEBUG_STRICT
2024-02-07BUG/MINOR: quic: fix possible integer wrap around in cubic window calculation
2024-02-07BUG/MINOR: ssl: Fix error message after ssl_sock_load_ocsp call
2024-02-07BUILD: quic: Variable name typo inside a BUG_ON().
2024-02-07BUG/MINOR: quic: Wrong ack ranges handling when reaching the limit.
2024-02-07BUG/MINOR: diag: run the final diags before quitting when using -c
2024-02-07BUG/MINOR: diag: always show the version before dumping a diag warning

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