Bad File Descriptors

Hello everybody!

I'm having some issues using net-snmp on freeBSD 11.1. NET-SNMP Version:
5.7.3.

I have some "pass" scripts on my snmpd.conf which call a shell script to
check some information from ipfw.

If I execute the shell script manually the time to response is almost
"instantaneous" if I try to do it a snmpget it takes 1 second or more, and
eventually timeout ...

Sometimes when the daemon keeps running for a long time, it consumes all
CPU and hang.

Using truss "truss -d -D -f -o truss_debug.tmp -p <SNMPD_PID>" I can see a
lot of "ERR # 9 'Bad file descriptor' " messages.

I have found this bug https://sourceforge.net/p/net-snmp/bugs/2596/, that
which is expected to be patched on my net-snmp version.

Can somebody help?

---

partial truss log below:

"
(...)
31737: 8.760443942 0.000050775 getsockname(8,{ AF_INET 0.0.0.0:161
},0x7fffffffe6b8) = 0 (0x0)
31737: 8.760959163 0.000068585 pipe2(0x7ffffffde9d8,0) = 0 (0x0)
31737: 8.761118820 0.000059085 pipe2(0x7ffffffde9d0,0) = 0 (0x0)
31737: 8.761325342 0.000057131 sigprocmask(SIG_BLOCK,{
SIGHUP|SIGINT|SIGQUIT|SIGILL|SIGTRAP|SIGABRT|SIGEMT|SIGFPE|SIGKILL|SIGBUS|SIGSEGV|SIGSYS|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2
},{ }) = 0 (0x0)
49714: 8.762116087 0.000000000 <new process>
31737: 8.762141649 0.000709589 fork()            = 49714 (0xc232)
49714: 8.762295510 0.000036108 thr_self(0x804616000) = 0 (0x0)
31737: 8.762325752 0.000043582 sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0)
31737: 8.762519911 0.000098616 close(9)          = 0 (0x0)
49714: 8.762549943 0.000038203 sysarch(AMD64_SET_FSBASE,0x7ffffffc1358) = 0
(0x0)
49714: 8.762716166 0.000080877 sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0)
31737: 8.762768128 0.000109651 close(12)         = 0 (0x0)
49714: 8.762878128 0.000029054 close(0)          = 0 (0x0)
31737: 8.762903411 0.000037854 close(10)         = 0 (0x0)
49714: 8.763153793 0.000065512 dup(0x9)          = 0 (0x0)
49714: 8.763300460 0.000054546 close(10)         = 0 (0x0)
49714: 8.763464238 0.000053917 close(1)          = 0 (0x0)
49714: 8.763605318 0.000049867 dup(0xc)          = 1 (0x1)
49714: 8.763740112 0.000048819 close(11)         = 0 (0x0)
49714: 8.763864011 0.000046515 close(2)          = 0 (0x0)
49714: 8.763985326 0.000046445 dup(0x1)          = 2 (0x2)
49714: 8.764134158 0.000047911 getdtablesize()   = 1886130 (0x1cc7b2)
49714: 8.764255961 0.000047073 close(1886129)    ERR#9 'Bad file descriptor'
49714: 8.764371200 0.000041276 close(1886128)    ERR#9 'Bad file descriptor'
49714: 8.764493283 0.000047422 close(1886127)    ERR#9 'Bad file descriptor'
49714: 8.764609709 0.000041276 close(1886126)    ERR#9 'Bad file descriptor'
49714: 8.764718243 0.000040369 close(1886125)    ERR#9 'Bad file descriptor'
49714: 8.764827125 0.000041276 close(1886124)    ERR#9 'Bad file descriptor'
49714: 8.764935869 0.000041346 close(1886123)    ERR#9 'Bad file descriptor'
49714: 8.765045729 0.000041276 close(1886122)    ERR#9 'Bad file descriptor'
49714: 8.765160549 0.000039949 close(1886121)    ERR#9 'Bad file descriptor'
49714: 8.765272435 0.000038343 close(1886120)    ERR#9 'Bad file descriptor'
49714: 8.765375940 0.000038343 close(1886119)    ERR#9 'Bad file descriptor'
49714: 8.765494321 0.000045397 close(1886118)    ERR#9 'Bad file descriptor'
(...)
"


-- 
[]'s

Lívio Zanol Puppim

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