mirror of
https://github.com/haproxy/haproxy.git
synced 2026-02-20 00:10:41 -05:00
HAProxy - Load balancer
dc8a20b317
This bug could be reproduced with -dMfail and dectected by libasan as follows:
$ ASAN_OPTIONS=disable_coredump=0:unmap_shadow_on_exit=1:abort_on_error=f quic-freeze.cfg -dMfail -dMno-cache -dM0x55
=================================================================
==82989==ERROR: AddressSanitizer: stack-use-after-scope on address 0x7ffc 0x560790cc4749 bp 0x7fff8e0e8e30 sp 0x7fff8e0e8e28
WRITE of size 8 at 0x7fff8e0ea338 thread T0
#0 0x560790cc4748 in qc_frm_free src/quic_frame.c:1222
#1 0x560790cc5260 in qc_release_frm src/quic_frame.c:1261
#2 0x560790d1de99 in qc_treat_acked_tx_frm src/quic_rx.c:312
#3 0x560790d1e708 in qc_ackrng_pkts src/quic_rx.c:370
#4 0x560790d22a1d in qc_parse_ack_frm src/quic_rx.c:694
#5 0x560790d25daa in qc_parse_pkt_frms src/quic_rx.c:988
#6 0x560790d2a509 in qc_treat_rx_pkts src/quic_rx.c:1373
#7 0x560790c72d45 in quic_conn_io_cb src/quic_conn.c:906
#8 0x560791207847 in run_tasks_from_lists src/task.c:596
#9 0x5607912095f0 in process_runnable_tasks src/task.c:876
#10 0x560791135564 in run_poll_loop src/haproxy.c:2966
#11 0x5607911363af in run_thread_poll_loop src/haproxy.c:3165
#12 0x56079113938c in main src/haproxy.c:3862
#13 0x7f92606edd09 in __libc_start_main ../csu/libc-start.c:308
#14 0x560790bcd529 in _start (/home/flecaille/src/haproxy/haproxy+0x
Address 0x7fff8e0ea338 is located in stack of thread T0 at offset 1032 i
#0 0x560790d29b52 in qc_treat_rx_pkts src/quic_rx.c:1341
This frame has 2 object(s):
[32, 48) 'ar' (line 1380)
[64, 1088) '_msg' (line 1368) <== Memory access at offset 1032 is inable
HINT: this may be a false positive if your program uses some custom stacnism, swapcontext or vfork
(longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-use-after-scope src/quic_frame.c:1222 i
Shadow bytes around the buggy address:
0x100071c15410: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
0x100071c15420: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
0x100071c15430: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
0x100071c15440: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
0x100071c15450: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
=>0x100071c15460: f8 f8 f8 f8 f8 f8 f8[f8]f8 f8 f8 f8 f8 f8 f3 f3
0x100071c15470: f3 f3 f3 f3 f3 f3 f3 f3 f3 f3 f3 f3 f3 f3 00 00
0x100071c15480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x100071c15490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x100071c154a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x100071c154b0: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 04 f3 f3 f3
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==82989==ABORTING
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
Aborted (core dumped)
Note that a coredump could not always be produced with all compilers. This was
always the case with clang 11.
When allocating frames to be retransmitted from qc_dgrams_retransmit(), if they
could not be sent for any reason, they could remain attached to a local list to
qc_dgrams_retransmit() and trigger a crash with libasan when releasing the
original frames they were duplicated from.
To fix this, always release the frames which could not be sent during
retransmissions calling qc_free_frm_list() where needed.
Must be backported as far as 2.6.
|
||
|---|---|---|
| .github | ||
| addons | ||
| admin | ||
| dev | ||
| doc | ||
| examples | ||
| include | ||
| reg-tests | ||
| scripts | ||
| src | ||
| tests | ||
| .cirrus.yml | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .travis.yml | ||
| BRANCHES | ||
| BSDmakefile | ||
| CHANGELOG | ||
| CONTRIBUTING | ||
| INSTALL | ||
| LICENSE | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
| SUBVERS | ||
| VERDATE | ||
| VERSION | ||
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)