ERROR: LeakSanitizer: detected memory leaks in quickjs

[Qbtly]

Version

3b45d155c77bbdfe9177b1e03db830d2aff0b2a8

Build platform

Ubuntu 22.04.3

Build steps

CONFIG_ASAN=y make qjs

Test case

//poc1
v1 = '';
v2 = v1.padEnd(2147483620, 0);

//poc2
v1 = '';
v2 = v1.padEnd(2147483620, '0');

Execution steps

./qjs poc.js

Output

//poc1
RangeError: invalid string length
    at padEnd (native)
    at <eval> (/js/poc.js:2)

=================================================================
==3597854==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 18 byte(s) in 1 object(s) allocated from:
    #0 0x56350e75811e in __interceptor_malloc (/quickjs/qjs+0xd211e) (BuildId: 4466830005a83e88bca3c9bb84fc0eb15d5a5115)
    #1 0x56350e879072 in js_def_malloc /quickjs/quickjs.c:1728:11
    #2 0x56350e7aeb02 in js_malloc_rt /quickjs/quickjs.c:1315:12
    #3 0x56350e7aeb02 in js_alloc_string_rt /quickjs/quickjs.c:1894:11
    #4 0x56350e7aeb02 in js_alloc_string /quickjs/quickjs.c:1912:9
    #5 0x56350e7aeb02 in js_new_string8 /quickjs/quickjs.c:3491:11
    #6 0x56350e7aeb02 in JS_NewStringLen /quickjs/quickjs.c:3902:16
    #7 0x56350e7ec17e in JS_NewString /quickjs/quickjs.c:3977:12
    #8 0x56350e7ec17e in JS_ToStringInternal /quickjs/quickjs.c:11739:16
    #9 0x56350ea253ef in JS_ToString /quickjs/quickjs.c:11745:12
    #10 0x56350ea253ef in js_string_pad /quickjs/quickjs.c:42395:13
    #11 0x56350e797cfe in js_call_c_function /quickjs/quickjs.c:16027:19
    #12 0x56350e7f0053 in JS_CallInternal /quickjs/quickjs.c:16209:16
    #13 0x56350e7ff4ad in JS_CallInternal /quickjs/quickjs.c:16616:27
    #14 0x56350e82ba38 in JS_CallFree /quickjs/quickjs.c:18695:19
    #15 0x56350e82ba38 in JS_EvalFunctionInternal /quickjs/quickjs.c:34351:19
    #16 0x56350e855f41 in __JS_EvalInternal /quickjs/quickjs.c:34486:19
    #17 0x56350e82d4e1 in JS_EvalInternal /quickjs/quickjs.c:34504:12
    #18 0x56350e82d4e1 in JS_EvalThis /quickjs/quickjs.c:34535:11
    #19 0x56350e82d4e1 in JS_Eval /quickjs/quickjs.c:34543:12
    #20 0x56350e794143 in eval_buf /quickjs/qjs.c:71:15
    #21 0x56350e7944ae in eval_file /quickjs/qjs.c:103:11
    #22 0x56350e79346f in main /quickjs/qjs.c:516:17
    #23 0x7f3e421d1d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16

SUMMARY: AddressSanitizer: 18 byte(s) leaked in 1 allocation(s).

//poc2
'RangeError: invalid string length
    at padEnd (native)
    at <eval> (/js/poc.js:2)

=================================================================
==3691592==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 18 byte(s) in 1 object(s) allocated from:
    #0 0x56155185c546 in __interceptor_realloc (/quickjs/qjs+0xd2546) (BuildId: 4466830005a83e88bca3c9bb84fc0eb15d5a5115)
    #1 0x56155197d3dd in js_def_realloc /quickjs/quickjs.c:1766:11
    #2 0x5615518b9afb in js_realloc_rt /quickjs/quickjs.c:1325:12
    #3 0x5615518b9afb in string_buffer_end /quickjs/quickjs.c:3867:15
    #4 0x5615519fd232 in js_parse_string /quickjs/quickjs.c:20447:24
    #5 0x561551a51d63 in next_token /quickjs/quickjs.c:20719:13
    #6 0x561551a8d80c in js_parse_expect /quickjs/quickjs.c:20239:12
    #7 0x561551a8d80c in js_parse_postfix_expr /quickjs/quickjs.c:24859:21
    #8 0x561551aa8f85 in js_parse_unary /quickjs/quickjs.c:25267:13
    #9 0x561551aa8141 in js_parse_expr_binary /quickjs/quickjs.c:25331:16
    #10 0x561551aa817e in js_parse_expr_binary /quickjs/quickjs.c:25355:13
    #11 0x561551aa817e in js_parse_expr_binary /quickjs/quickjs.c:25355:13
    #12 0x561551aa817e in js_parse_expr_binary /quickjs/quickjs.c:25355:13
    #13 0x561551aa817e in js_parse_expr_binary /quickjs/quickjs.c:25355:13
    #14 0x561551aa817e in js_parse_expr_binary /quickjs/quickjs.c:25355:13
    #15 0x561551aa817e in js_parse_expr_binary /quickjs/quickjs.c:25355:13
    #16 0x561551aa817e in js_parse_expr_binary /quickjs/quickjs.c:25355:13
    #17 0x561551aa817e in js_parse_expr_binary /quickjs/quickjs.c:25355:13
    #18 0x561551aa74ff in js_parse_logical_and_or /quickjs/quickjs.c:25500:13
    #19 0x561551aa751d in js_parse_logical_and_or /quickjs/quickjs.c:25503:13
    #20 0x561551aa0603 in js_parse_coalesce_expr /quickjs/quickjs.c:25540:9
    #21 0x561551aa0603 in js_parse_cond_expr /quickjs/quickjs.c:25568:9
    #22 0x561551aa0603 in js_parse_assign_expr2 /quickjs/quickjs.c:25781:9
    #23 0x561551aa1323 in js_parse_assign_expr2 /quickjs/quickjs.c:25792:13
    #24 0x561551a9fc3b in js_parse_expr2 /quickjs/quickjs.c:25888:13
    #25 0x561551a5ecc8 in js_parse_expr /quickjs/quickjs.c:25910:12
    #26 0x561551a5ecc8 in js_parse_statement_or_decl /quickjs/quickjs.c:27219:13
    #27 0x561551a555cf in js_parse_source_element /quickjs/quickjs.c:29418:13
    #28 0x561551959913 in js_parse_program /quickjs/quickjs.c:34298:13
    #29 0x561551959913 in __JS_EvalInternal /quickjs/quickjs.c:34461:11
    #30 0x5615519314e1 in JS_EvalInternal /quickjs/quickjs.c:34504:12
    #31 0x5615519314e1 in JS_EvalThis /quickjs/quickjs.c:34535:11
    #32 0x5615519314e1 in JS_Eval /quickjs/quickjs.c:34543:12
    #33 0x561551898143 in eval_buf /quickjs/qjs.c:71:15
    #34 0x5615518984ae in eval_file /quickjs/qjs.c:103:11
    #35 0x56155189746f in main /quickjs/qjs.c:516:17
    #36 0x7fe555791d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16

SUMMARY: AddressSanitizer: 18 byte(s) leaked in 1 allocation(s).