Issue 45636 in oss-fuzz: elfutils:fuzz-libdwfl: Crash in read_long_names

Issue 45636 in oss-fuzz: elfutils:fuzz-libdwfl: Crash in read_long_names

[ClusterFuzz-External via monorail]

Status: New
Owner: ----
CC: elfut...@sourceware.org, da...@adalogics.com, evv...@gmail.com, izzeem@google.com 
Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible Stability-AFL OS-Linux Engine-afl Security_Severity-Medium Proj-elfutils Reported-2022-03-17
Type: Bug-Security

New issue 45636 by ClusterFuzz-External: elfutils:fuzz-libdwfl: Crash in read_long_names
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=45636

Detailed Report: https://oss-fuzz.com/testcase?key=5787862593830912

Project: elfutils
Fuzzing Engine: afl
Fuzz Target: fuzz-libdwfl
Job Type: afl_asan_elfutils
Platform Id: linux

Crash Type: UNKNOWN
Crash Address: 0x7fdae5ef5000
Crash State:
  read_long_names
  __libelf_next_arhdr_wrlock
  dup_elf
  
Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed: https://oss-fuzz.com/revisions?job=afl_asan_elfutils&range=202203161800:202203170000

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5787862593830912

Issue filed automatically.

See https://google.github.io/oss-fuzz/advanced-topics/reproducing for instructions to reproduce this bug locally.
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Issue 45636 in oss-fuzz: elfutils:fuzz-libdwfl: Crash in read_long_names

[da… via monorail]

Comment #1 on issue 45636 by da...@adalogics.com: elfutils:fuzz-libdwfl: Crash in read_long_names
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=45636#c1

ASAN report
=================================================================
==746==ERROR: AddressSanitizer: unknown-crash on address 0x7f1a9af3d000 at pc 0x00000048a379 bp 0x7ffeb1d3c230 sp 0x7ffeb1d3b9e8
READ of size 985 at 0x7f1a9af3d000 thread T0
SCARINESS: 16 (multi-byte-read-unknown-crash)
    #0 0x48a378 in __interceptor_atol /src/llvm-project/compiler-rt/lib/asan/asan_interceptors.cpp:522:3
    #1 0x5b4615 in read_long_names /src/elfutils/libelf/elf_begin.c:766:13
    #2 0x5b2aa4 in __libelf_next_arhdr_wrlock /src/elfutils/libelf/elf_begin.c:912:8
    #3 0x5b6d7d in dup_elf /src/elfutils/libelf/elf_begin.c:1061:10
    #4 0x5b5028 in lock_dup_elf /src/elfutils/libelf/elf_begin.c:1119:10
    #5 0x5b4e36 in elf_begin /src/elfutils/libelf/elf_begin.c:0
    #6 0x4db735 in process_archive /src/elfutils/libdwfl/offline.c:251:17
    #7 0x4db181 in process_file /src/elfutils/libdwfl/offline.c:125:14
    #8 0x4daf3b in __libdwfl_report_offline /src/elfutils/libdwfl/offline.c:287:22
    #9 0x4db2a2 in dwfl_report_offline /src/elfutils/libdwfl/offline.c:316:10
    #10 0x4d842f in LLVMFuzzerTestOneInput /src/fuzz-libdwfl.c:47:22
    #11 0x4d8225 in ExecuteFilesOnyByOne aflplusplus/utils/aflpp_driver/aflpp_driver.c:191:7
    #12 0x4d8095 in main aflplusplus/utils/aflpp_driver/aflpp_driver.c:0
    #13 0x7f1a9bd060b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/libc-start.c:308:16
    #14 0x41e58d in _start
Address 0x7f1a9af3d000 is a wild pointer inside of access range of size 0x0000000003d9.
SUMMARY: AddressSanitizer: unknown-crash (/mnt/scratch0/clusterfuzz/bot/builds/clusterfuzz-builds-afl_elfutils_b7ca3a6bcc40cef461446d759ca780e6ea3657cd/revisions/fuzz-libdwfl+0x48a378)
Shadow bytes around the buggy address:
  0x0fe3d35df9b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0fe3d35df9c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0fe3d35df9d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0fe3d35df9e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0fe3d35df9f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0fe3d35dfa00:[fe]fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
  0x0fe3d35dfa10: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
  0x0fe3d35dfa20: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
  0x0fe3d35dfa30: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
  0x0fe3d35dfa40: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
  0x0fe3d35dfa50: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
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
==746==ABORTING

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Issue 45636 in oss-fuzz: elfutils:fuzz-libdwfl: Crash in read_long_names

[da… via monorail]

Comment #2 on issue 45636 by da...@adalogics.com: elfutils:fuzz-libdwfl: Crash in read_long_names
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=45636#c2

(No comment was entered for this change.)

Attachments:
	clusterfuzz-testcase-minimized-fuzz-libdwfl-5787862593830912  8.0 KB

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Issue 45636 in oss-fuzz: elfutils:fuzz-libdwfl: Crash in read_long_names

[evv… via monorail]

Comment #3 on issue 45636 by evv...@gmail.com: elfutils:fuzz-libdwfl: Crash in read_long_names
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=45636#c3

It seems to be a duplicate of https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=45628. Any idea why OSS-Fuzz keeps reporting it?

It can't be reproduced with libfuzzer either: https://github.com/google/oss-fuzz/pull/7403

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Issue 45636 in oss-fuzz: elfutils:fuzz-libdwfl: Crash in read_long_names

[ClusterFuzz-External via monorail]

Updates:
	Labels: ClusterFuzz-Verified
	Status: Verified

Comment #4 on issue 45636 by ClusterFuzz-External: elfutils:fuzz-libdwfl: Crash in read_long_names
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=45636#c4

ClusterFuzz testcase 5787862593830912 is verified as fixed in https://oss-fuzz.com/revisions?job=afl_asan_elfutils&range=202203210605:202203211200

If this is incorrect, please file a bug on https://github.com/google/oss-fuzz/issues/new

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