https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78746
Dominique d'Humieres <dominiq at lps dot ens.fr> changed: What |Removed |Added ---------------------------------------------------------------------------- Target|arm aarch64 | Status|UNCONFIRMED |NEW Last reconfirmed| |2016-12-09 Ever confirmed|0 |1 --- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- Confirmed on x86 as well: see https://gcc.gnu.org/ml/gcc-testresults/2016-12/msg01049.html. They are all heap-use-after-free: [Book15] f90/bug% gfcg /opt/gcc/work/gcc/testsuite/gfortran.dg/charlen_15.f90 ================================================================= ==52586==ERROR: AddressSanitizer: heap-use-after-free on address 0x604000001110 at pc 0x0001001ea062 bp 0x7fff5fbfe5b0 sp 0x7fff5fbfe5a8 READ of size 8 at 0x604000001110 thread T0 #0 0x1001ea061 in mio_expr(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001ea061) #1 0x1001eb55a in mio_charlen(gfc_charlen**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001eb55a) #2 0x1001ebb2b in mio_typespec(gfc_typespec*) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001ebb2b) #3 0x1001e9f6e in mio_expr(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001e9f6e) #4 0x1001edb45 in mio_component(gfc_component*, int) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001edb45) #5 0x1001ede9e in mio_component_list(gfc_component**, int) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001ede9e) #6 0x1001f2045 in mio_symbol(gfc_symbol*) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001f2045) #7 0x1001f2c7c in write_symbol(int, gfc_symbol*) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001f2c7c) #8 0x1001fbc3c in write_symbol0(gfc_symtree*) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001fbc3c) #9 0x1001fb8d4 in write_symbol0(gfc_symtree*) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001fb8d4) #10 0x1001fc21d in write_module() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001fc21d) #11 0x1001fc697 in dump_module(char const*, int) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001fc697) #12 0x1001fcdd4 in gfc_dump_module(char const*, int) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001fcdd4) #13 0x1002a824f in gfc_parse_file() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1002a824f) #14 0x100405ab7 in gfc_be_parse_file() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x100405ab7) #15 0x104b3dc50 in compile_file() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x104b3dc50) #16 0x104b466e9 in do_compile() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x104b466e9) #17 0x106c28c4e in toplev::main(int, char**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x106c28c4e) #18 0x106c2df67 in main (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x106c2df67) #19 0x7fffe8d83254 in start (/usr/lib/system/libdyld.dylib+0x5254) 0x604000001110 is located 0 bytes inside of 48-byte region [0x604000001110,0x604000001140) freed by thread T0 here: #0 0x152bf48b0 in wrap_free.part.0 (/opt/gcc/gcc7a/lib/libasan.4.dylib+0x638b0) #1 0x10031c473 in resolve_structure_cons(gfc_expr*, int) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x10031c473) #2 0x10035169b in resolve_values(gfc_symbol*) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x10035169b) #3 0x1003ad64e in do_traverse_symtree(gfc_symtree*, void (*)(gfc_symtree*), void (*)(gfc_symbol*)) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1003ad64e) #4 0x1003c60c3 in gfc_traverse_ns(gfc_namespace*, void (*)(gfc_symbol*)) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1003c60c3) #5 0x1003567a1 in resolve_types(gfc_namespace*) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1003567a1) #6 0x1003052d7 in gfc_resolve(gfc_namespace*) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1003052d7) #7 0x1002a7e8d in gfc_parse_file() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1002a7e8d) #8 0x100405ab7 in gfc_be_parse_file() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x100405ab7) #9 0x104b3dc50 in compile_file() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x104b3dc50) #10 0x104b466e9 in do_compile() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x104b466e9) #11 0x106c28c4e in toplev::main(int, char**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x106c28c4e) #12 0x106c2df67 in main (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x106c2df67) #13 0x7fffe8d83254 in start (/usr/lib/system/libdyld.dylib+0x5254) previously allocated by thread T0 here: #0 0x152bf3f30 in wrap_calloc (/opt/gcc/gcc7a/lib/libasan.4.dylib+0x62f30) #1 0x1069e7b07 in xcalloc (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1069e7b07) #2 0x1003c32dd in gfc_new_charlen(gfc_namespace*, gfc_charlen*) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1003c32dd) #3 0x100086558 in gfc_match_char_spec(gfc_typespec*) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x100086558) #4 0x1001b3da7 in gfc_match_type_spec(gfc_typespec*) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001b3da7) #5 0x100019611 (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x100019611) #6 0x1001c923a in match_primary(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001c923a) #7 0x1001c952b in match_level_1(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001c952b) #8 0x1001c9904 in match_mult_operand(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001c9904) #9 0x1001ca1e0 in match_add_operand(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001ca1e0) #10 0x1001cac48 in match_level_2(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001cac48) #11 0x1001cb1bc in match_level_3(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001cb1bc) #12 0x1001cb6a4 in match_level_4(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001cb6a4) #13 0x1001cc6b9 in match_and_operand(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001cc6b9) #14 0x1001cc9b3 in match_or_operand(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001cc9b3) #15 0x1001cce6a in match_equiv_operand(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001cce6a) #16 0x1001cd327 in match_level_5(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001cd327) #17 0x1001c8d10 in gfc_match_expr(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001c8d10) #18 0x1000f1600 in gfc_match_init_expr(gfc_expr**) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1000f1600) #19 0x1000a71a3 in variable_decl(int) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1000a71a3) #20 0x1000a7bd3 in gfc_match_data_decl() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1000a7bd3) #21 0x10028bdb8 in match_word(char const*, match (*)(), locus*) (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x10028bdb8) #22 0x10029728e in decode_statement() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x10029728e) #23 0x100299861 in next_free() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x100299861) #27 0x1002a70ba in parse_module() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1002a70ba) #28 0x1002a806c in gfc_parse_file() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1002a806c) #29 0x100405ab7 in gfc_be_parse_file() (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x100405ab7) SUMMARY: AddressSanitizer: heap-use-after-free (/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin16.1.0/7.0.0/f951+0x1001ea061) in mio_expr(gfc_expr**) Shadow bytes around the buggy address: 0x1c08000001d0: fa fa 00 00 00 00 00 00 fa fa 00 00 00 00 00 00 0x1c08000001e0: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fd 0x1c08000001f0: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fa 0x1c0800000200: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fa 0x1c0800000210: fa fa fd fd fd fd fd fa fa fa 00 00 00 00 00 00 =>0x1c0800000220: fa fa[fd]fd fd fd fd fd fa fa 00 00 00 00 00 00 0x1c0800000230: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fd 0x1c0800000240: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fd 0x1c0800000250: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fd 0x1c0800000260: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fd 0x1c0800000270: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==52586==ABORTING f951: internal compiler error: Abort trap: 6 gfcg: internal compiler error: Abort trap: 6 (program f951) Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions.