[ZBX-25543] Agent2 Crash During Log Monitoring Due to Regular Expression Processing (regexp_sub_ex2) Created: 2024 Nov 14 Updated: 2025 Feb 07 Resolved: 2025 Feb 07 |
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| Status: | Closed |
| Project: | ZABBIX BUGS AND ISSUES |
| Component/s: | Agent (G) |
| Affects Version/s: | 6.0.35 |
| Fix Version/s: | 6.0.39rc1, 7.0.10rc1, 7.2.4rc1, 7.4.0alpha1 |
| Type: | Problem report | Priority: | Trivial |
| Reporter: | Kim Jongkwon | Assignee: | Vladislavs Sokurenko |
| Resolution: | Fixed | Votes: | 1 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | 11.5h | ||
| Original Estimate: | Not Specified | ||
| Attachments: |
0001-.G.-ZBX-25543-added-sanitizing-of-invalid-UTF-8-when.patch
0001-.G.-ZBX-25543-test-added-logging.patch
agent2_patched.log
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| Issue Links: |
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| Team: |  Team A |
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| Sprint: | S24-W50/51/52/1, S25-W2/3, S25-W4/5, S25-W6/7 | ||||||||||||
| Story Points: | 1 | ||||||||||||
| Description |
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I’m currently investigating this crash issue. I received a report of Zabbix Agent2 crashing with backtrace records, as shown below. [2024-11-06 10:01:20.750] 2024/11/05 19:22:51.133195 process_logrt() old file list: [2024-11-06 10:01:20.750] 2024/11/05 19:22:51.133200 nr:0 filename:'/var/log/xxx/log_file.log' mtime:1730802120 size:1292897198 processed_size:1478396 seq:1 copy_of:-1 incomplete:0 dev:64768 ino_hi:0 ino_lo:134912620 md5_block_size:512 first_block_md5:9b3958b59a53233463e8099a801f6b1c last_block_offset:1292896686 last_block_md5:f7c07268b383f942a7cf32d89a1551b1 [2024-11-06 10:01:20.750] 2024/11/05 19:22:51.133206 process_logrt() new file list: (mtime:1730802120 lastlogsize:1478396 start_idx:0) [2024-11-06 10:01:20.750] 2024/11/05 19:22:51.133212 nr:0 filename:'/var/log/xxx/log_file.log' mtime:1730802120 size:1292897198 processed_size:1478396 seq:0 copy_of:-1 incomplete:0 dev:64768 ino_hi:0 ino_lo:134912620 md5_block_size:512 first_block_md5:9b3958b59a53233463e8099a801f6b1c last_block_offset:1292896686 last_block_md5:f7c07268b383f942a7cf32d89a1551b1 [2024-11-06 10:01:20.761] 2024/11/05 19:22:51.133216 In process_log() filename:'/var/log/xxx/log_file.log' lastlogsize:1478396 mtime:1730802120 seek_offset:1478396 [2024-11-06 10:01:20.761] 2024/11/05 19:22:51.133358 itemid 115537: regexp runtime error: Error occurred while matching regular expression: UTF-8 error: isolated byte with 0x80 bit set [2024-11-06 10:01:20.761] 2024/11/05 19:22:51.134464 9: /usr/sbin/zabbix_agent2(zbx_backtrace+0x3c) [0xb22eec] [2024-11-06 10:01:20.761] 2024/11/05 19:22:51.134478 8: /usr/sbin/zabbix_agent2(zbx_log_fatal_info+0x475) [0xb23485] [2024-11-06 10:01:20.761] 2024/11/05 19:22:51.134482 7: /usr/sbin/zabbix_agent2() [0x9c6ad6] [2024-11-06 10:01:20.761] 2024/11/05 19:22:51.134489 6: /lib64/libpthread.so.0(+0x12ce0) [0x7f5150516ce0] [2024-11-06 10:01:20.761] 2024/11/05 19:22:51.134495 5: /lib64/libc.so.6(+0xc818e) [0x7f514fa8a18e] [2024-11-06 10:01:20.761] 2024/11/05 19:22:51.134498 4: /usr/sbin/zabbix_agent2(regexp_sub_ex2+0x86) [0xb29e56] [2024-11-06 10:01:20.761] 2024/11/05 19:22:51.134501 3: /usr/sbin/zabbix_agent2(process_log_check+0x17ad) [0xb3c7bd] [2024-11-06 10:01:20.773] 2024/11/05 19:22:51.134504 2: /usr/sbin/zabbix_agent2() [0x9c6bdc] [2024-11-06 10:01:20.773] 2024/11/05 19:22:51.134508 1: /usr/sbin/zabbix_agent2(_cgo_6e671d72c461_Cfunc_invoke_process_log_check+0x6c) [0x9c6d1e] [2024-11-06 10:01:20.773] 2024/11/05 19:22:51.134511 0: /usr/sbin/zabbix_agent2() [0x48e0e8] The information below indicates that the issue occurred during log and regular expression matching: regexp runtime error: Error occurred while matching regular expression: UTF-8 error: isolated byte with 0x80 bit set ZBX-25805 has been created for it. Zabbix Agent2 version was 6.0.27 $ zabbix_agent2 -V zabbix_agent2 (Zabbix) 6.0.27 I expected We are investigating further, including the log content and regular expressions. |
| Comments |
| Comment by Vladislavs Sokurenko [ 2025 Jan 29 ] |
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Fixed in pull request feature/ZBX-25543-6.0 |
| Comment by Vladislavs Sokurenko [ 2025 Feb 06 ] |
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Fixed in:
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