Devuan bug report logs - #113
auditctl segmentation fault

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Subject: bug#113: auditctl segmentation fault
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Package: auditd                          
Version: 1:2.4-1+b1 

Hi,
Jessie throws a seg fault when running a simple command like:

root@devuan:~# auditctl -s
enabled 1
flag 1
pid 8393
rate_limit 0
backlog_limit 320
lost 0
backlog 0
Segmentation fault


Running a strace it seems it cannot handle the response form the socket (too big?)

root@devuan:~# strace auditctl -s
execve("/sbin/auditctl", ["auditctl", "-s"], [/* 12 vars */]) = 0
brk(0)                                  = 0x5623724d5000
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3ed1135000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=35244, ...}) = 0
mmap(NULL, 35244, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f3ed112c000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libaudit.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20*\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=113024, ...}) = 0
mmap(NULL, 2249344, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f3ed0cf1000
mprotect(0x7f3ed0d0b000, 2093056, PROT_NONE) = 0
mmap(0x7f3ed0f0a000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19000) = 0x7f3ed0f0a000
mmap(0x7f3ed0f0d000, 37504, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f3ed0f0d000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libauparse.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\220(\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=88624, ...}) = 0
mmap(NULL, 2183984, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f3ed0adb000
mprotect(0x7f3ed0af0000, 2093056, PROT_NONE) = 0
mmap(0x7f3ed0cef000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14000) = 0x7f3ed0cef000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\34\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1738176, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3ed112b000
mmap(NULL, 3844640, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f3ed0730000
mprotect(0x7f3ed08d1000, 2097152, PROT_NONE) = 0
mmap(0x7f3ed0ad1000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1a1000) = 0x7f3ed0ad1000
mmap(0x7f3ed0ad7000, 14880, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f3ed0ad7000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3ed112a000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3ed1129000
arch_prctl(ARCH_SET_FS, 0x7f3ed112a700) = 0
mprotect(0x7f3ed0ad1000, 16384, PROT_READ) = 0
mprotect(0x7f3ed0f0a000, 8192, PROT_READ) = 0
mprotect(0x7f3ed0cef000, 4096, PROT_READ) = 0
mprotect(0x5623714e3000, 4096, PROT_READ) = 0
mprotect(0x7f3ed1137000, 4096, PROT_READ) = 0
munmap(0x7f3ed112c000, 35244)           = 0
geteuid()                               = 0
brk(0)                                  = 0x5623724d5000
brk(0x5623724f6000)                     = 0x5623724f6000
socket(PF_NETLINK, SOCK_RAW, NETLINK_AUDIT) = 3
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
sendto(3, "\20\0\0\0\350\3\5\0\1\0\0\0\0\0\0\0", 16, 0, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 16
poll([{fd=3, events=POLLIN}], 1, 500)   = 1 ([{fd=3, revents=POLLIN}])
recvfrom(3, "$\0\0\0\2\0\0\0\1\0\0\0f\"\0\0\0\0\0\0\20\0\0\0\350\3\5\0\1\0\0\0"..., 8988, MSG_PEEK|MSG_DONTWAIT, {sa_family=AF_NETLINK, pid=0, groups=00000000}, [12]) = 36
recvfrom(3, "$\0\0\0\2\0\0\0\1\0\0\0f\"\0\0\0\0\0\0\20\0\0\0\350\3\5\0\1\0\0\0"..., 8988, MSG_DONTWAIT, {sa_family=AF_NETLINK, pid=0, groups=00000000}, [12]) = 36
select(4, [3], NULL, NULL, {0, 100000}) = 1 (in [3], left {0, 99995})
recvfrom(3, "8\0\0\0\350\3\0\0\1\0\0\0f\"\0\0\0\0\0\0\1\0\0\0\1\0\0\0\311 \0\0"..., 8988, MSG_DONTWAIT, {sa_family=AF_NETLINK, pid=0, groups=00000000}, [12]) = 56
fstat(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3ed1134000
write(1, "enabled 1\n", 10enabled 1
)             = 10
write(1, "flag 1\n", 7flag 1
)                 = 7
write(1, "pid 8393\n", 9pid 8393
)               = 9
write(1, "rate_limit 0\n", 13rate_limit 0
)          = 13
write(1, "backlog_limit 320\n", 18backlog_limit 320
)     = 18
write(1, "lost 0\n", 7lost 0
)                 = 7
write(1, "backlog 0\n", 10backlog 0
)             = 10
sendto(3, " \0\0\0\373\3\5\0\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32, 0, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 32
poll([{fd=3, events=POLLIN}], 1, 500)   = 1 ([{fd=3, revents=POLLIN}])
recvfrom(3, "$\0\0\0\2\0\0\0\2\0\0\0f\"\0\0\0\0\0\0 \0\0\0\373\3\5\0\2\0\0\0"..., 8988, MSG_PEEK|MSG_DONTWAIT, {sa_family=AF_NETLINK, pid=0, groups=00000000}, [12]) = 36
recvfrom(3, "$\0\0\0\2\0\0\0\2\0\0\0f\"\0\0\0\0\0\0 \0\0\0\373\3\5\0\2\0\0\0"..., 8988, MSG_DONTWAIT, {sa_family=AF_NETLINK, pid=0, groups=00000000}, [12]) = 36
select(4, [3], NULL, NULL, {0, 100000}) = 1 (in [3], left {0, 99990})
recvfrom(3, " \0\0\0\373\3\0\0\2\0\0\0f\"\0\0\1\0\0\0\377\377\377\377\0\0\0\0\0\0\0\0", 8988, MSG_DONTWAIT, {sa_family=AF_NETLINK, pid=0, groups=00000000}, [12]) = 32
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x4} ---
+++ killed by SIGSEGV +++
Segmentation fault

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