segfault RHEL6

[tsigian]

RPM VERSION: sysdig-0.8.0-1.x86_64
KERNEL: 2.6.32-431.el6.x86_64
OS: Red Hat Enterprise Linux Server release 6.5 (Santiago)

WHAT I DID:
sudo gdb --args sysdig -G 15 -W 2 -w /tmp/UNIX/testTrialRead.scap

(gdb) run
Starting program: /usr/bin/sysdig -G 15 -W 2 -w /tmp/UNIX/testTrialRead.scap
[Thread debugging using libthread_db enabled]

Program received signal SIGSEGV, Segmentation fault.
0x0000003a14878fe4 in _int_malloc () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install sysdig-0.8.0-1.x86_64
(gdb)
(gdb) bt
#0 0x0000003a14878fe4 in _int_malloc () from /lib64/libc.so.6
#1 0x0000003a1487a6b1 in malloc () from /lib64/libc.so.6
#2 0x00000031b72bd09d in operator new(unsigned long) () from /usr/lib64/libstdc++.so.6
#3 0x00000031b729c3c9 in std::basic_string<char, std::char_traits, std::allocator >::Rep::S_create(unsigned long, unsigned long, std::allocator const&) () from /usr/lib64/libstdc++.so.6
#4 0x00000031b729d19b in std::basic_string<char, std::char_traits, std::allocator >::Rep::M_clone(std::allocator const&, unsigned long) () from /usr/lib64/libstdc++.so.6
#5 0x00000031b729d5ec in std::basic_string<char, std::char_traits, std::allocator >::reserve(unsigned long) () from /usr/lib64/libstdc++.so.6
#6 0x00000031b729dabf in std::basic_string<char, std::char_traits, std::allocator >::append(std::basic_string<char, std::char_traits, std::allocator > const&) () from /usr/lib64/libstdc++.so.6
#7 0x00000000005062d5 in sinsp_threadinfo::compute_program_hash() ()
#8 0x0000000000509630 in sinsp_thread_manager::add_thread(sinsp_threadinfo&, bool) ()
#9 0x00000000005034a7 in sinsp_parser::parse_clone_exit(sinsp_evt*) ()
#10 0x0000000000503f7b in sinsp_parser::process_event(sinsp_evt*) ()
#11 0x000000000050c530 in sinsp::next(sinsp_evt**) ()
#12 0x0000000000475ce6 in do_inspect(sinsp, unsigned long, int, bool, bool, bool, bool, sinsp_filter, std::vector<summary_table_entry, std::allocator<summary_table_entry> >, sinsp_evt_formatter) ()
#13 0x0000000000478e05 in sysdig_init(int, char**) ()
#14 0x0000000000461fd0 in main ()

[luca3m]

I wasn't able to replicate it. Does it happen on many hosts or only on a single one? Are you able to run valgrind and send us the output? Googling I found this kind of segfault on malloc may be due to heap corruption.

[tsigian]

Ran it with basic valgrind and didn't last more than few minutes/seconds, please find attached.
This is a HP Z800 Workstation with 12 cores and 32G RAM.

sudo_valgrind_sysdig_-G15_-W2_-w.txt

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.