Issue 45619 in oss-fuzz: elfutils:fuzz-elf-get-sections: Misaligned-address in elf_cvt_Verdef

Issue 45619 in oss-fuzz: elfutils:fuzz-elf-get-sections: Misaligned-address in elf_cvt_Verdef

[ClusterFuzz-External via monorail]

Status: New
Owner: ----
CC: elfut...@sourceware.org, evv...@gmail.com, izzeem@google.com 
Labels: ClusterFuzz Reproducible Stability-UndefinedBehaviorSanitizer Engine-libfuzzer OS-Linux Proj-elfutils Reported-2022-03-16
Type: Bug

New issue 45619 by ClusterFuzz-External: elfutils:fuzz-elf-get-sections: Misaligned-address in elf_cvt_Verdef
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=45619

Detailed Report: https://oss-fuzz.com/testcase?key=5857986591981568

Project: elfutils
Fuzzing Engine: libFuzzer
Fuzz Target: fuzz-elf-get-sections
Job Type: libfuzzer_ubsan_elfutils
Platform Id: linux

Crash Type: Misaligned-address
Crash Address: 
Crash State:
  elf_cvt_Verdef
  __libelf_set_data_list_rdlock
  __elf_getdata_rdlock
  
Sanitizer: undefined (UBSAN)

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_ubsan_elfutils&range=202203160607:202203161200

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5857986591981568

Issue filed automatically.

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Re: Issue 45619 in oss-fuzz: elfutils:fuzz-elf-get-sections: Misaligned-address in elf_cvt_Verdef

[Mark Wielaard]

Hi,

On Wed, Mar 16, 2022 at 02:58:26PM -0700, ClusterFuzz-External via monorail via Elfutils-devel wrote:
> Status: New
> Owner: ----
> CC: elfut...@sourceware.org, evv...@gmail.com, izzeem@google.com 
> Labels: ClusterFuzz Reproducible Stability-UndefinedBehaviorSanitizer Engine-libfuzzer OS-Linux Proj-elfutils Reported-2022-03-16
> Type: Bug
> 
> New issue 45619 by ClusterFuzz-External: elfutils:fuzz-elf-get-sections: Misaligned-address in elf_cvt_Verdef
> https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=45619
>
> Detailed Report: https://oss-fuzz.com/testcase?key=5857986591981568

Anyone any idea how to replicate this? The detailed report appears to
require some kind of login.

> Project: elfutils
> Fuzzing Engine: libFuzzer
> Fuzz Target: fuzz-elf-get-sections
> Job Type: libfuzzer_ubsan_elfutils
> Platform Id: linux

Where does this "fuzz-elf-get-sections" target come from?

> Crash Type: Misaligned-address
> Crash Address: 
> Crash State:
>   elf_cvt_Verdef
>   __libelf_set_data_list_rdlock
>   __elf_getdata_rdlock
>   
> Sanitizer: undefined (UBSAN)
> 
> Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_ubsan_elfutils&range=202203160607:202203161200
> 
> Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5857986591981568

This testcase seems to have no section headers, so it is unclear how
to get to the above crash state.

Cheers,

Mark

Issue 45619 in oss-fuzz: elfutils:fuzz-elf-get-sections: Misaligned-address in elf_cvt_Verdef

[ClusterFuzz-External via monorail]

Updates:
	Cc: da...@adalogics.com

Comment #1 on issue 45619 by ClusterFuzz-External: elfutils:fuzz-elf-get-sections: Misaligned-address in elf_cvt_Verdef
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=45619#c1

(No comment was entered for this change.)

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Issue 45619 in oss-fuzz: elfutils:fuzz-elf-get-sections: Misaligned-address in elf_cvt_Verdef

[ClusterFuzz-External via monorail]

Updates:
	Labels: ClusterFuzz-Verified
	Status: Verified

Comment #2 on issue 45619 by ClusterFuzz-External: elfutils:fuzz-elf-get-sections: Misaligned-address in elf_cvt_Verdef
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=45619#c2

ClusterFuzz testcase 5857986591981568 is verified as fixed in https://oss-fuzz.com/revisions?job=libfuzzer_ubsan_elfutils&range=202203161800:202203170000

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

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