https://sourceware.org/bugzilla/show_bug.cgi?id=21433
Bug ID: 21433
Summary: Runtime error in ar
Product: binutils
Version: 2.28
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: dungnguy at comp dot nus.edu.sg
Target Milestone: ---
Dear All,
This bug was found with AFLGo, a directed version of AFL/AFLFast. Thanks also
to Marcel Böhme and Van-Thuan Pham.
This bug was found on Ubuntu 14.04 64-bit & binutils was checked out from main
repository at git://sourceware.org/git/binutils-gdb.git. Its commit is
a49abe0bb18e04d3a4b692995fcfae70cd470775 (Tue Apr 25 00:00:36 2017).
binutils was built with ASAN using gcc-6.2 and clang-3.4. The configure command
was:
CC=clang CFLAGS="-DFORTIFY_SOURCE=2 -fstack-protector-all
-fsanitize=undefined,address -fno-omit-frame-pointer -g -Wno-error"
../configure --disable-shared --disable-gdb --disable-libdecnumber
--disable-readline --disable-sim
To reproduce:
ar -s
ASAN says:
../../binutils/bucomm.c:590:13: runtime error: null pointer passed as argument
1, which is declared to never be null
/usr/include/x86_64-linux-gnu/sys/stat.h:210:43: note: nonnull attribute
specified here
SUMMARY: AddressSanitizer: undefined-behavior ../../binutils/bucomm.c:590:13 in
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/ar: Warning:
could not locate '(null)'. reason: Bad address
VALGRIND says:
==171860== Syscall param stat(file_name) points to unaddressable byte(s)
==171860== at 0x51298B5: _xstat (xstat.c:35)
==171860== by 0x40845B: stat (stat.h:455)
==171860== by 0x40845B: get_file_size (bucomm.c:590)
==171860== by 0x406538: ranlib_only (ar.c:1433)
==171860== by 0x4038E6: main (ar.c:761)
==171860== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==171860==
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