https://sourceware.org/bugzilla/show_bug.cgi?id=21135
Bug ID: 21135 Summary: readelf segfault - invalid read Product: binutils Version: 2.29 (HEAD) Status: UNCONFIRMED Severity: normal Priority: P2 Component: binutils Assignee: unassigned at sourceware dot org Reporter: thuanpv at comp dot nus.edu.sg Target Milestone: --- Created attachment 9802 --> https://sourceware.org/bugzilla/attachment.cgi?id=9802&action=edit Crashing input Dear all, This bug was found with AFLGo, a directed version of AFL/AFLFast. Thanks also to Marcel Böhme. We found several inputs causing readelf to crash. we will report all of them one by one. This bug was found on Ubuntu 14.04 64-bit & binutils was checkout from main repository at git://sourceware.org/git/binutils-gdb.git. Its commit is 53f7e8ea7fad1fcff1b58f4cbd74e192e0bcbc1d (Fri Feb 10 00:00:16 2017) To reproduce: Download the attached file - bug_1 readelf -zR3 bug_1 Valgrind says: ==54145== Command: /home/ubuntu/thesis/subjects/binutils-newest/build-normal/binutils/readelf -zR3 bug_1 ==54145== readelf: Warning: Section 1 has an out of range sh_info value of 61440 readelf: Warning: Section 3 has an out of range sh_link value of 1179648 readelf: Warning: Section 4 has an out of range sh_link value of 4278190955 readelf: Warning: Section 5 has an out of range sh_link value of 1310720 readelf: Warning: Section 6 has an out of range sh_link value of 1953068403 readelf: Warning: Section 7 has an out of range sh_link value of 117442048 readelf: Error: Reading 0x180064 bytes extends past end of file for string table readelf: Error: Section 3 has invalid sh_entsize of 0600000000000000 readelf: Error: (Using the expected size of 24 for the rest of this dump) Hex dump of section '<no-name>': ==54145== Invalid read of size 1 ==54145== at 0x40E9A0: dump_section_as_bytes (readelf.c:12786) ==54145== by 0x42334D: process_section_contents (readelf.c:13085) ==54145== by 0x42334D: process_object (readelf.c:16780) ==54145== by 0x402111: process_file (readelf.c:17154) ==54145== by 0x402111: main (readelf.c:17225) ==54145== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==54145== ==54145== ==54145== Process terminating with default action of signal 11 (SIGSEGV) ==54145== Access not within mapped region at address 0x0 ==54145== at 0x40E9A0: dump_section_as_bytes (readelf.c:12786) ==54145== by 0x42334D: process_section_contents (readelf.c:13085) ==54145== by 0x42334D: process_object (readelf.c:16780) ==54145== by 0x402111: process_file (readelf.c:17154) ==54145== by 0x402111: main (readelf.c:17225) ASAN says: ==57956==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x00000055efcf sp 0x7fff2de971a0 bp 0x7fff2de97af0 T0) #0 0x55efce in dump_section_as_bytes /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:12786 #1 0x4e1531 in process_section_contents /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:13085 #2 0x48d610 in process_object /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:16780 #3 0x488365 in process_file /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:17154 #4 0x4855c3 in main /home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/../../binutils/readelf.c:17225 #5 0x7f62892d3f44 (/lib/x86_64-linux-gnu/libc.so.6+0x21f44) #6 0x47ddfc in _start (/home/ubuntu/thesis/subjects/binutils-newest/build-asan/binutils/readelf+0x47ddfc) -- You are receiving this mail because: You are on the CC list for the bug. _______________________________________________ bug-binutils mailing list bug-binutils@gnu.org https://lists.gnu.org/mailman/listinfo/bug-binutils