Technical Tip: The httpsd daemon keeps crashing due to a memory leak, causing an impact on the REST API services and GUI admin access

[caunon]

Description	This article describes the situation where the httpsd daemon with FortiGate firmware v7.4.5 build2702 keeps crashing. It causes an impact on the REST API services and GUI admin access.
Scope	FortiGate v7.4.5.
Solution	The httpsd daemon keeps crashing after upgrading FortiOS to v7.4.5 build2702. Run the CLI command, and it shows the logs as below: diagnose debug crashlog read 15409: 2025-11-15 05:45:19 <02589> firmware FortiGate-VM64-AZURE v7.4.5,build2702b2702,240916 (GA.M) 15410: 2025-11-15 05:45:19 (Release) 15411: 2025-11-15 05:45:19 <02589> application httpsd 15412: 2025-11-15 05:45:19 <02589> *** signal 11 (Segmentation fault) received *** 15413: 2025-11-15 05:45:19 <02589> Register dump: 15414: 2025-11-15 05:45:19 <02589> RAX: 00000000109116b8   RBX: 0000000010254210 15415: 2025-11-15 05:45:19 <02589> RCX: 0000000000002000   RDX: 0000000000000000 15416: 2025-11-15 05:45:19 <02589> R08: 0000000000000007   R09: 0000000000000000 15417: 2025-11-15 05:45:19 <02589> R10: 0000000000000001   R11: 0000000000000000 15418: 2025-11-15 05:45:19 <02589> R12: 0000000010792e10   R13: 00007ffc8599abd0 15419: 2025-11-15 05:45:19 <02589> R14: 0000000010981560   R15: 00000000109ec4c0 15420: 2025-11-15 05:45:19 <02589> RSI: 00000000109117d0   RDI: 00000000109117d0 15421: 2025-11-15 05:45:19 <02589> RBP: 0000000000012890   RSP: 00007ffc8599a8c0 15422: 2025-11-15 05:45:19 <02589> RIP: 00007f1a98e5f08e   EFLAGS: 0000000000010202 15423: 2025-11-15 05:45:19 <02589> CS:  0033   FS: 0000   GS: 0000 15424: 2025-11-15 05:45:19 <02589> Trap: 000000000000000e   Error: 0000000000000006 15425: 2025-11-15 05:45:19 <02589> OldMask: 0000000000000000 15426: 2025-11-15 05:45:19 <02589> CR2: 0000000000000020 15427: 2025-11-15 05:45:19 <02589> stack: 0x7ffc8599a8c0 - 0x7ffc8599bb50 15428: 2025-11-15 05:45:19 <02589> Backtrace: 15429: 2025-11-15 05:45:19 <02589> [0x7f1a98e5f08e] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15430: 2025-11-15 05:45:19 (lh_table_delete_entry+0x0000006e) liboffset 0000c08e 15431: 2025-11-15 05:45:19 <02589> [0x7f1a98e57cd8] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15432: 2025-11-15 05:45:19 liboffset 00004cd8 15433: 2025-11-15 05:45:19 <02589> [0x7f1a98e585de] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15434: 2025-11-15 05:45:19 (json_object_put+0x0000005e) liboffset 000055de 15435: 2025-11-15 05:45:19 <02589> [0x7f1a98e5ec89] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15436: 2025-11-15 05:45:19 (lh_table_free+0x00000029) liboffset 0000bc89 15437: 2025-11-15 05:45:19 <02589> [0x7f1a98e5843d] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15438: 2025-11-15 05:45:19 liboffset 0000543d 15439: 2025-11-15 05:45:19 <02589> [0x7f1a98e585de] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15440: 2025-11-15 05:45:19 (json_object_put+0x0000005e) liboffset 000055de 15441: 2025-11-15 05:45:19 <02589> [0x7f1a98e5ec89] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15442: 2025-11-15 05:45:19 (lh_table_free+0x00000029) liboffset 0000bc89 15443: 2025-11-15 05:45:19 <02589> [0x7f1a98e5843d] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15444: 2025-11-15 05:45:19 liboffset 0000543d 15445: 2025-11-15 05:45:19 <02589> [0x7f1a98e585de] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15446: 2025-11-15 05:45:19 (json_object_put+0x0000005e) liboffset 000055de 15447: 2025-11-15 05:45:19 <02589> [0x7f1a98e5ec89] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15448: 2025-11-15 05:45:19 (lh_table_free+0x00000029) liboffset 0000bc89 15449: 2025-11-15 05:45:19 <02589> [0x7f1a98e5843d] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15450: 2025-11-15 05:45:19 liboffset 0000543d 15451: 2025-11-15 05:45:19 <02589> [0x7f1a98e585de] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15452: 2025-11-15 05:45:19 (json_object_put+0x0000005e) liboffset 000055de 15453: 2025-11-15 05:45:19 <02589> [0x7f1a98e5ec89] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15454: 2025-11-15 05:45:19 (lh_table_free+0x00000029) liboffset 0000bc89 15455: 2025-11-15 05:45:19 <02589> [0x7f1a98e5843d] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15456: 2025-11-15 05:45:19 liboffset 0000543d 15457: 2025-11-15 05:45:19 <02589> [0x7f1a98e585de] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15458: 2025-11-15 05:45:19 (json_object_put+0x0000005e) liboffset 000055de 15459: 2025-11-15 05:45:19 <02589> [0x7f1a98e5ec89] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15460: 2025-11-15 05:45:19 (lh_table_free+0x00000029) liboffset 0000bc89 15461: 2025-11-15 05:45:19 <02589> [0x7f1a98e5843d] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15462: 2025-11-15 05:45:19 liboffset 0000543d 15463: 2025-11-15 05:45:19 <02589> [0x7f1a98e585de] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15464: 2025-11-15 05:45:19 (json_object_put+0x0000005e) liboffset 000055de 15465: 2025-11-15 05:45:19 <02589> [0x7f1a98e5ec89] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15466: 2025-11-15 05:45:19 (lh_table_free+0x00000029) liboffset 0000bc89 15467: 2025-11-15 05:45:19 <02589> [0x7f1a98e5843d] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15468: 2025-11-15 05:45:19 liboffset 0000543d 15469: 2025-11-15 05:45:19 <02589> [0x7f1a98e585de] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15470: 2025-11-15 05:45:19 (json_object_put+0x0000005e) liboffset 000055de 15471: 2025-11-15 05:45:19 <02589> [0x7f1a98e58640] => /usr/lib/x86_64-linux-gnu/libjson-c.so.5 15472: 2025-11-15 05:45:19 (json_object_put_no_assert+0x00000010) liboffset 00005640 15473: 2025-11-15 05:45:19 <02589> [0x00e61c6e] => /bin/httpsd 15474: 2025-11-15 05:45:19 <02589> [0x00e6ed15] => /bin/httpsd 15475: 2025-11-15 05:45:19 <02589> [0x00e05619] => /bin/httpsd 15476: 2025-11-15 05:45:19 <02589> [0x010319da] => /bin/httpsd (ap_run_handler+0x0000004a) 15477: 2025-11-15 05:45:19 <02589> [0x01032236] => /bin/httpsd (ap_invoke_handler+0x000000c6) 15478: 2025-11-15 05:45:19 <02589> [0x0107a119] => /bin/httpsd 15479: 2025-11-15 05:45:19 <02589> [0x0107a361] => /bin/httpsd (ap_process_request+0x00000021) 15480: 2025-11-15 05:45:19 <02589> [0x0107248f] => /bin/httpsd 15481: 2025-11-15 05:45:19 <02589> [0x0103623a] => /bin/httpsd (ap_run_process_connection+0x0000004a) 15482: 2025-11-15 05:45:19 <02589> [0x0104bf07] => /bin/httpsd 15483: 2025-11-15 05:45:19 <02589> [0x0104c1d6] => /bin/httpsd 15484: 2025-11-15 05:45:19 <02589> [0x0104c3c4] => /bin/httpsd 15485: 2025-11-15 05:45:19 <02589> [0x0104c9fd] => /bin/httpsd 15486: 2025-11-15 05:45:19 <02589> [0x01047ca1] => /bin/httpsd (ap_run_mpm+0x00000061) 15487: 2025-11-15 05:45:19 <02589> [0x010477d6] => /bin/httpsd 15488: 2025-11-15 05:45:19 <02589> [0x0045111f] => /bin/httpsd 15489: 2025-11-15 05:45:19 <02589> [0x004569f8] => /bin/httpsd 15490: 2025-11-15 05:45:19 <02589> [0x004571ea] => /bin/httpsd 15491: 2025-11-15 05:45:19 <02589> [0x00459a9f] => /bin/httpsd 15492: 2025-11-15 05:45:19 <02589> [0x0045a407] => /bin/httpsd 15493: 2025-11-15 05:45:19 <02589> [0x7f1a9a6ede1b] => /usr/lib/x86_64-linux-gnu/libc.so.6 15494: 2025-11-15 05:45:19 (__libc_start_main+0x000000eb) liboffset 00023e1b 15495: 2025-11-15 05:45:19 <02589> [0x0044c21a] => /bin/httpsd 15496: 2025-11-15 05:45:19 <02589> fortidev 6.0.2.0008 To fix: For a permanent fix, it is necessary to upgrade FortiGate firmware version to v7.4.9, v7.6.3, and above.