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Fix crash on subscribe under certain unlikely conditions.

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Closes #2885.
Closes #2881.

Thanks to everybody on those issues.
This commit is contained in:
Roger A. Light 2023-09-12 23:09:24 +01:00
parent 1ed275b1d4
commit f09ea91e11
4 changed files with 35 additions and 2 deletions
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8
ChangeLog.txt
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@ -1,3 +1,11 @@
2.0.18 - 2023-09-12
===================
Broker:
- Fix crash on subscribe under certain unlikely conditions. Closes #2885.
Closes #2881.
2.0.17 - 2023-08-22
===================

9
config.mk
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@ -120,6 +120,9 @@ WITH_JEMALLOC:=no
# probably of no particular interest to end users.
WITH_XTREPORT=no
# Build using clang and with address sanitiser enabled
WITH_ASAN=no
# =============================================================================
# End of user configuration
# =============================================================================
@ -152,6 +155,12 @@ else
CFLAGS?=-Wall -ggdb -O2 -Wconversion -Wextra
endif
ifeq ($(WITH_ASAN),yes)
CC:=clang
CFLAGS+=-fsanitize=address
LDFLAGS+=-fsanitize=address
endif
STATIC_LIB_DEPS:=
APP_CPPFLAGS=$(CPPFLAGS) -I. -I../../ -I../../include -I../../src -I../../lib

2
src/subs.c
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@ -389,7 +389,6 @@ static int sub__remove_normal(struct mosquitto *context, struct mosquitto__subhi
if(context->subs[i] && context->subs[i]->hier == subhier){
mosquitto__free(context->subs[i]);
context->subs[i] = NULL;
context->sub_count--;
break;
}
}
@ -430,7 +429,6 @@ static int sub__remove_shared(struct mosquitto *context, struct mosquitto__subhi
mosquitto__free(context->subs[i]);
context->subs[i] = NULL;
context->sub_count--;
break;
}
}

18
test/broker/data/REGRESSION.json Normal file
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@ -0,0 +1,18 @@
[
{
"group": "REGRESSIONS",
"tests": [
{ "name": "subscribe-unsubscribe-crash part 1", "ver":4, "expect_disconnect":false, "msgs": [
{"type":"send", "payload":"82 26 1234 0009 64 72 61 73 68 2F 31 2F 23 00 0009 65 72 61 73 68 2F 32 2F 23 00 0009 63 72 61 73 68 2F 33 2F 23 00"},
{"type":"recv", "payload":"90 05 1234 00 00 00"},
{"type":"send", "payload":"A2 0D 1234 0009 64 72 61 73 68 2F 31 2F 23"},
{"type":"recv", "payload":"B0 02 1234"}
], "comment": "Must be used with part 2 immediately after",
"comment2": "Requires WITH_ASAN=yes"},
{ "name": "subscribe-unsubscribe-crash part 2", "ver":4, "expect_disconnect":false, "msgs": [
{"type":"send", "payload":"82 0E 1234 0009 63 72 61 73 68 2F 33 2F 23 00"},
{"type":"recv", "payload":"90 03 1234 00"}
], "comment": "https://github.com/eclipse/mosquitto/issues/2885"}
]
}
]