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systemd/test/fuzz/fuzz-calendarspec/oss-fuzz-22208

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shared: fix integer overflow in calendarspec Fixes: oss-fuzz#22208 ``` test/fuzz/fuzz-calendarspec/oss-fuzz-22208... ../src/shared/calendarspec.c:666:48: runtime error: signed integer overflow: 2147000000 + 1000000 cannot be represented in type 'int' #0 0x7f0b9f6cc56a in prepend_component ../src/shared/calendarspec.c:666 #1 0x7f0b9f6cd03a in parse_chain ../src/shared/calendarspec.c:718 #2 0x7f0b9f6cea1c in parse_calendar_time ../src/shared/calendarspec.c:845 #3 0x7f0b9f6d1397 in calendar_spec_from_string ../src/shared/calendarspec.c:1084 #4 0x401570 in LLVMFuzzerTestOneInput ../src/fuzz/fuzz-calendarspec.c:17 #5 0x401ae0 in main ../src/fuzz/fuzz-main.c:39 #6 0x7f0b9e31b1a2 in __libc_start_main (/lib64/libc.so.6+0x271a2) #7 0x40122d in _start (/home/fsumsal/repos/systemd/build/fuzz-calendarspec+0x40122d) SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../src/shared/calendarspec.c:666:48 in ```
2020-05-15 13:02:43 +03:00
4:3:2147..2
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