[Git][NTPsec/ntpsec][master] ntpd/ntp_sandbox.c: allow readv() for glibc nscd getaddrinfo() provider

[Hal Murray (@hal.murray)]

Hal Murray pushed to branch master at NTPsec / ntpsec


Commits:
a49d53b7 by Maciej S. Szmigiero at 2022-06-11T15:16:15+02:00
ntpd/ntp_sandbox.c: allow readv() for glibc nscd getaddrinfo() provider

Otherwise, ntpd crashes from time to time with the following stack trace:
#0  0x00007f5763bfac4d in readv () from /lib64/libc.so.6
#1  0x00007f5763c48b4c in __readvall () from /lib64/libc.so.6
#2  0x00007f5763c467ed in nscd_gethst_r () from /lib64/libc.so.6
#3  0x00007f5763c46c0d in __nscd_gethostbyname2_r () from /lib64/libc.so.6
#4  0x00007f5763c15a2a in gethostbyname2_r () from /lib64/libc.so.6
#5  0x00007f5763bed3ca in gaih_inet.constprop () from /lib64/libc.so.6
#6  0x00007f5763bee225 in getaddrinfo () from /lib64/libc.so.6
#7  0x000055fcf0ad6544 in open_TCP_socket ()
#8  0x000055fcf0ad79b4 in nts_probe ()
#9  0x000055fcf0ac37c4 in dns_lookup ()
#10 0x00007f5763b8205a in start_thread () from /lib64/libc.so.6
#11 0x00007f5763c05d1c in clone3 () from /lib64/libc.so.6

Signed-off-by: Maciej S. Szmigiero <mail at maciej.szmigiero.name>

- - - - -


1 changed file:

- ntpd/ntp_sandbox.c


Changes:

=====================================
ntpd/ntp_sandbox.c
=====================================
@@ -357,6 +357,7 @@ int scmp_sc[] = {
 	SCMP_SYS(poll),
 	SCMP_SYS(pselect6),
 	SCMP_SYS(read),
+	SCMP_SYS(readv),	/* nscd getaddrinfo() provider */
 	SCMP_SYS(recvfrom),    /* Comment this out for testing.
 				* It will die on the first reply.
 				* (Or maybe sooner if a request arrives.)



View it on GitLab: https://gitlab.com/NTPsec/ntpsec/-/commit/a49d53b7fe1dafecc09dbe1e1d2743e4d517620c

-- 
View it on GitLab: https://gitlab.com/NTPsec/ntpsec/-/commit/a49d53b7fe1dafecc09dbe1e1d2743e4d517620c
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