New subject: [Bug 1171321] nftables crashes when trying to add rule to nonexistent chain

7 May 2020


      http://bugzilla.opensuse.org/show_bug.cgi?id=1171321
Bug ID: 1171321
           Summary: nftables crashes when trying to add rule to
                    nonexistant chain
    Classification: openSUSE
           Product: openSUSE Tumbleweed
           Version: Current
          Hardware: Other
                OS: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Basesystem
          Assignee: jengelh@inai.de
          Reporter: mrueckert@suse.com
        QA Contact: qa-bugs@suse.de
          Found By: ---
           Blocker: ---
Core was generated by `nft add rule inet traffic-filter input tcp dport { 22,
80, 443 } accept'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  erec_print (octx=octx@entry=0x55776a4222c0, erec=erec@entry=0x55776a425780,
debug_mask=debug_mask@entry=0) at ../../src/erec.c:95
95        switch (indesc->type) {
(gdb) bt
#0  erec_print (octx=octx@entry=0x55776a4222c0, erec=erec@entry=0x55776a425780,
debug_mask=debug_mask@entry=0) at ../../src/erec.c:95
#1  0x00007f0eadab847a in erec_print_list (octx=octx@entry=0x55776a4222c0,
list=list@entry=0x7ffd930c3ff0, debug_mask=0) at ../../src/erec.c:190
#2  0x00007f0eadac2915 in nft_run_cmd_from_buffer (nft=0x55776a4222a0,
buf=<optimized out>) at ../../src/libnftables.c:459
#3  0x0000557769ea68a3 in main (argc=14, argv=<optimized out>) at
../../src/main.c:453
(gdb) l
90        char *pbuf = NULL;
91        unsigned int i, end;
92        FILE *f;
93        int l;
94    
95        switch (indesc->type) {
96        case INDESC_BUFFER:
97        case INDESC_CLI:
98            line = indesc->data;
99            *strchrnul(line, '\n') = '\0';
(gdb) p indesc
$1 = (const struct input_descriptor *) 0x0
(gdb) quit
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[Bug 1171321] New: nftables crashes when trying to add rule to nonexistant chain