[Fixed] Periodical SIGSEGV in php-fpm while using webapp with KC 8.4.0~596 (utf-16.so)

umgfoin

Hello community,
current KC 8.4.0~596 breaks webapp-functionality with php-fpm:
When accessing an email-item in webapp (e.g. loading preview-pane) php-fpm asserts after mmapping utf-16.so .
Downgrading core to 8.4.0-553 resolves the issue.

CentOS 6.9
PHP-FPM: PHP 5.6.30
WebApp: 3.4.0.659-465.1

strace:

stat("/etc/krb5.conf", {st_mode=S_IFREG|0644, st_size=449, ...}) = 0
open("/etc/krb5.conf", O_RDONLY)        = 8
fcntl(8, F_SETFD, FD_CLOEXEC)           = 0
fstat(8, {st_mode=S_IFREG|0644, st_size=449, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8f89464000
read(8, "[logging]\n default = FILE:/var/l"..., 4096) = 449
read(8, "", 4096)                       = 0
close(8)                                = 0
munmap(0x7f8f89464000, 4096)            = 0
open("/dev/urandom", O_RDONLY)          = 8
fcntl(8, F_SETFD, FD_CLOEXEC)           = 0
fstat(8, {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9), ...}) = 0
read(8, "\331ip\245\254\275\20\345M\346\243\366\2006' X\374B\fZ\367h\252V\243z\16\262D\4U"..., 64) = 64
close(8)                                = 0
socket(PF_LOCAL, SOCK_STREAM, 0)        = 8
connect(8, {sa_family=AF_LOCAL, sun_path="/var/run/kopano/server.sock"}, 110) = 0
sendto(8, "POST /var/run/kopano/server.sock"..., 1274, 0, NULL, 0) = 1274
recvfrom(8, "HTTP/1.1 200 OK\r\nServer: gSOAP/2"..., 65536, 0, NULL, NULL) = 124
recvfrom(8, "306\r\n<?xml version=\"1.0\" encodin"..., 65536, 0, NULL, NULL) = 786
shutdown(8, SHUT_RDWR)                  = 0
close(8)                                = 0
open("/usr/lib64/gconv/UTF-16.so", O_RDONLY) = 8
read(8, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\5\0\0\0\0\0\0"..., 832) = 832
fstat(8, {st_mode=S_IFREG|0755, st_size=17112, ...}) = 0
mmap(NULL, 2109496, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 8, 0) = 0x7f8f89261000
mprotect(0x7f8f89263000, 2097152, PROT_NONE) = 0
mmap(0x7f8f89463000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 8, 0x2000) = 0x7f8f89463000
close(8)                                = 0
mprotect(0x7f8f89463000, 4096, PROT_READ) = 0
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0} ---
+++ killed by SIGSEGV +++

++umgfoin.

Ihon

Looks like my error, but with php 7 and is also extended to z-push
I published the error in WebApp

Thanks

Ihon

umgfoin

Reference to Ihon’s post

Sebastian

@jengelh could you have a look at this?

umgfoin

Same problem with package core-8.4.0~636_135.1-RHEL_6_PHP_56-x86_64

++umgfoin.

Joost

Hello community,

Thank you for reporting the issue.

We were also able to reproduce it on our test systems and have created a fix in version 8.4.0-644.

Please upgrade your systems to this version (it’s just been published to the community) and let us know if the problem has been resolved.

Kind regards,

Joost

Ihon

Hi Joost,

thank you!
It is working again :-)

Thank you all

Ihon

umgfoin

@Joost said in [Bugreport] Periodical SIGSEGV in php-fpm while using webapp with KC 8.4.0~596 (utf-16.so):

Please upgrade your systems to this version (it’s just been published to the community) and let us know if the problem has been resolved.

Hi Joost,
thanks - build 8.4.0-644 fixes above issues on CentOS 6.9.

I ran into one problem while applying the update (yum update *.rpm):

php-xapian-1.2.21-5.1.x86_64.rpm postulates dependencies on php5 although it should depend on php56 (for the RHEL6 packages).
rpm -U php-xapian-1.2.21-5.1.x86_64.rpm --nodeps was a workaround, but I think this package still needs fine-tuning.

++umgfoin.