https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87681
Bug ID: 87681 Summary: Recursive Stack Overflow within function d_name, d_encoding, and d_local_name in cp-demangle.c, as demonstrated by "nm -C" Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: demangler Assignee: unassigned at gcc dot gnu.org Reporter: N1705695H at e dot ntu.edu.sg Target Milestone: --- Created attachment 44876 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44876&action=edit POC An issue was discovered in cp-demangle.c in GNU libiberty, as distributed in GNU Binutils 2.31. Stack Exhaustion occurs in the C++ demangling functions provided by libiberty, and there is a stack consumption problem caused by recursive stack frames: d_name, d_encoding, and d_local_name. Please use the "./nm -C $POC" to reproduce the bug. This result can trigger different Stack Overflow, you can try several times. To reproduce this bug. You need to build bintuils-2.31 with ASAN. Here is the compile Option. Another approach is to set the break Point and debug it, then see the back trace. > CC=clang LDFLAGS="-ldl" CFLAGS="-DFORTIFY_SOURCE=2 -fstack-protector-all > -fsanitize=undefined,address -fno-omit-frame-pointer -g -O0 -Wno-error" > ./configure --disable-shared --disable-gdb --disable-libdecnumber > --disable-sim The ASAN dumps the stack trace as follows: > AddressSanitizer:DEADLYSIGNAL > ================================================================= > ==18186==ERROR: AddressSanitizer: stack-overflow on address 0x7ffeca00cf98 > (pc 0x0000008e8b7a bp 0x7ffeca00d080 sp 0x7ffeca00cfa0 T0) > #0 0x8e8b79 in d_name binutils-2.31/libiberty/./cp-demangle.c:1411:28 > #1 0x8dcc1d in d_encoding binutils-2.31/libiberty/./cp-demangle.c:1312:12 > #2 0x8ea4d3 in d_local_name > binutils-2.31/libiberty/./cp-demangle.c:3590:14 > #3 0x8e8b7e in d_name binutils-2.31/libiberty/./cp-demangle.c:1411:14 > #4 0x8dcc1d in d_encoding binutils-2.31/libiberty/./cp-demangle.c:1312:12 > #5 0x8ea4d3 in d_local_name > binutils-2.31/libiberty/./cp-demangle.c:3590:14 > #6 0x8e8b7e in d_name binutils-2.31/libiberty/./cp-demangle.c:1411:14 > #7 0x8dcc1d in d_encoding binutils-2.31/libiberty/./cp-demangle.c:1312:12 > #8 0x8ea4d3 in d_local_name > binutils-2.31/libiberty/./cp-demangle.c:3590:14 > #9 0x8e8b7e in d_name binutils-2.31/libiberty/./cp-demangle.c:1411:14 > #10 0x8dcc1d in d_encoding binutils-2.31/libiberty/./cp-demangle.c:1312:12 > #11 0x8ea4d3 in d_local_name > binutils-2.31/libiberty/./cp-demangle.c:3590:14 > #12 0x8e8b7e in d_name binutils-2.31/libiberty/./cp-demangle.c:1411:14 > #13 0x8dcc1d in d_encoding binutils-2.31/libiberty/./cp-demangle.c:1312:12 > #14 0x8ea4d3 in d_local_name > binutils-2.31/libiberty/./cp-demangle.c:3590:14 > #15 0x8e8b7e in d_name binutils-2.31/libiberty/./cp-demangle.c:1411:14 > #16 0x8dcc1d in d_encoding binutils-2.31/libiberty/./cp-demangle.c:1312:12 > #17 0x8ea4d3 in d_local_name > binutils-2.31/libiberty/./cp-demangle.c:3590:14 > ... > #246 0x8e8b7e in d_name binutils-2.31/libiberty/./cp-demangle.c:1411:14 > #247 0x8dcc1d in d_encoding > binutils-2.31/libiberty/./cp-demangle.c:1312:12 > #248 0x8ea4d3 in d_local_name > binutils-2.31/libiberty/./cp-demangle.c:3590:14 > #249 0x8e8b7e in d_name binutils-2.31/libiberty/./cp-demangle.c:1411:14 > SUMMARY: AddressSanitizer: stack-overflow > binutils-2.31/libiberty/./cp-demangle.c:1411:28 in d_name > ==19901==ABORTING > 00000000 AAborted