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dd98bc353e
Simplify handling of USR2 signal. The SCLogInfo usage could lead to
dead locks as the SCLog API can do many complicated things including
memory allocations, syslog calls, libjansson message construction.
If an existing malloc call was interupted, it could lead to the
following dead lock:
0 __lll_lock_wait_private () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:97
1 0x0000003140c7d2df in _L_lock_10176 () from /lib64/libc.so.6
2 0x0000003140c7ab83 in __libc_malloc (bytes=211543457408) at malloc.c:3655
3 0x0000003140c80ec2 in __strdup (s=0x259ca40 "[%i] %t - (%f:%l) <%d> (%n) -- ") at strdup.c:43
4 0x000000000059dd4a in SCLogMessageGetBuffer (tval=0x7fff52b47360, color=1, type=SC_LOG_OP_TYPE_REGULAR, buffer=0x7fff52b47370 "", buffer_size=2048,
log_format=0x259ca40 "[%i] %t - (%f:%l) <%d> (%n) -- ", log_level=SC_LOG_INFO, file=0x63dd00 "suricata.c", line=287, function=0x640f50 "SignalHandlerSigusr2StartingUp", error_code=SC_OK,
message=0x7fff52b47bb0 "Live rule reload only possible after engine completely started.") at util-debug.c:307
5 0x000000000059e940 in SCLogMessage (log_level=SC_LOG_INFO, file=0x63dd00 "suricata.c", line=287, function=0x640f50 "SignalHandlerSigusr2StartingUp", error_code=SC_OK,
message=0x7fff52b47bb0 "Live rule reload only possible after engine completely started.") at util-debug.c:549
6 0x000000000057e374 in SignalHandlerSigusr2StartingUp (sig=12) at suricata.c:287
7 <signal handler called>
8 _int_malloc (av=0x3140f8fe80, bytes=<value optimized out>) at malloc.c:4751
9 0x0000003140c7ab1c in __libc_malloc (bytes=296) at malloc.c:3657
10 0x0000000000504d55 in FlowAlloc () at flow-util.c:60
11 0x00000000004fd909 in FlowInitConfig (quiet=0 '\000') at flow.c:454
12 0x0000000000584c8e in main (argc=6, argv=0x7fff52b4a3b8) at suricata.c:2300
This patch simply sets a variable and lets the main loop act on that.
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