Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

read past end of argv array in zpool_do_import() #12339

Merged
merged 1 commit into from
Jul 26, 2021

Conversation

ahrens
Copy link
Member

@ahrens ahrens commented Jul 8, 2021

Motivation and Context

zpool_do_import() passes argv[0], (optionally) argv[1], and
pool_specified to import_pools(). If pool_specified==FALSE, the
argv[] arguments are not used. However, these values may be off the
end of the argv[] array, so loading them could dereference unmapped
memory. This error is reported by the asan build:

=================================================================
==6003==ERROR: AddressSanitizer: heap-buffer-overflow
READ of size 8 at 0x6030000004a8 thread T0
    #0 0x562a078b50eb in zpool_do_import zpool_main.c:3796
    #1 0x562a078858c5 in main zpool_main.c:10709
    #2 0x7f5115231bf6 in __libc_start_main
    #3 0x562a07885eb9 in _start

0x6030000004a8 is located 0 bytes to the right of 24-byte region
allocated by thread T0 here:
    #0 0x7f5116ac6b40 in __interceptor_malloc
    #1 0x562a07885770 in main zpool_main.c:10699
    #2 0x7f5115231bf6 in __libc_start_main

Description

This commit passes NULL for these arguments if they are off the end of the
argv[] array.

How Has This Been Tested?

run zpool import on --with-asan build

Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Performance enhancement (non-breaking change which improves efficiency)
  • Code cleanup (non-breaking change which makes code smaller or more readable)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • Library ABI change (libzfs, libzfs_core, libnvpair, libuutil and libzfsbootenv)
  • Documentation (a change to man pages or other documentation)

Checklist:

`zpool_do_import()` passes `argv[0]`, (optionally) `argv[1]`, and
`pool_specified` to `import_pools()`.  If `pool_specified==FALSE`, the
`argv[]` arguments are not used.  However, these values may be off the
end of the `argv[]` array, so loading them could dereference unmapped
memory.  This error is reported by the asan build:

```
=================================================================
==6003==ERROR: AddressSanitizer: heap-buffer-overflow
READ of size 8 at 0x6030000004a8 thread T0
    #0 0x562a078b50eb in zpool_do_import zpool_main.c:3796
    #1 0x562a078858c5 in main zpool_main.c:10709
    #2 0x7f5115231bf6 in __libc_start_main
    #3 0x562a07885eb9 in _start

0x6030000004a8 is located 0 bytes to the right of 24-byte region
allocated by thread T0 here:
    #0 0x7f5116ac6b40 in __interceptor_malloc
    #1 0x562a07885770 in main zpool_main.c:10699
    #2 0x7f5115231bf6 in __libc_start_main
```

This commit passes NULL for these arguments if they are off the end of the
`argv[]` array.

Signed-off-by: Matthew Ahrens <[email protected]>
Copy link
Contributor

@allanjude allanjude left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Reviewed By: Allan Jude [email protected]

@jwk404 jwk404 added the Status: Code Review Needed Ready for review and testing label Jul 12, 2021
@jwk404 jwk404 added Status: Accepted Ready to integrate (reviewed, tested) and removed Status: Code Review Needed Ready for review and testing labels Jul 12, 2021
@jwk404
Copy link
Contributor

jwk404 commented Jul 13, 2021

@ahrens could you please reformat your commit message to not exceed 71 characters in a line? Once checkstyle passes, we can merge this.

@behlendorf behlendorf merged commit d8381f5 into openzfs:master Jul 26, 2021
@behlendorf
Copy link
Contributor

Merged, I updated the commit message to not exceed 71 characters when merging.

@ahrens ahrens deleted the zpool_do_import branch July 26, 2021 21:00
behlendorf pushed a commit to behlendorf/zfs that referenced this pull request Aug 23, 2021
`zpool_do_import()` passes `argv[0]`, (optionally) `argv[1]`, and
`pool_specified` to `import_pools()`.  If `pool_specified==FALSE`, the
`argv[]` arguments are not used.  However, these values may be off the
end of the `argv[]` array, so loading them could dereference unmapped
memory.  This error is reported by the asan build:

```
=================================================================
==6003==ERROR: AddressSanitizer: heap-buffer-overflow
READ of size 8 at 0x6030000004a8 thread T0
    #0 0x562a078b50eb in zpool_do_import zpool_main.c:3796
    #1 0x562a078858c5 in main zpool_main.c:10709
    #2 0x7f5115231bf6 in __libc_start_main
    #3 0x562a07885eb9 in _start

0x6030000004a8 is located 0 bytes to the right of 24-byte region
allocated by thread T0 here:
    #0 0x7f5116ac6b40 in __interceptor_malloc
    #1 0x562a07885770 in main zpool_main.c:10699
    #2 0x7f5115231bf6 in __libc_start_main
```

This commit passes NULL for these arguments if they are off the end
of the `argv[]` array.

Reviewed-by: George Wilson <[email protected]>
Reviewed-by: John Kennedy <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Allan Jude <[email protected]>
Signed-off-by: Matthew Ahrens <[email protected]>
Closes openzfs#12339
behlendorf pushed a commit to behlendorf/zfs that referenced this pull request Aug 24, 2021
`zpool_do_import()` passes `argv[0]`, (optionally) `argv[1]`, and
`pool_specified` to `import_pools()`.  If `pool_specified==FALSE`, the
`argv[]` arguments are not used.  However, these values may be off the
end of the `argv[]` array, so loading them could dereference unmapped
memory.  This error is reported by the asan build:

```
=================================================================
==6003==ERROR: AddressSanitizer: heap-buffer-overflow
READ of size 8 at 0x6030000004a8 thread T0
    #0 0x562a078b50eb in zpool_do_import zpool_main.c:3796
    #1 0x562a078858c5 in main zpool_main.c:10709
    #2 0x7f5115231bf6 in __libc_start_main
    #3 0x562a07885eb9 in _start

0x6030000004a8 is located 0 bytes to the right of 24-byte region
allocated by thread T0 here:
    #0 0x7f5116ac6b40 in __interceptor_malloc
    #1 0x562a07885770 in main zpool_main.c:10699
    #2 0x7f5115231bf6 in __libc_start_main
```

This commit passes NULL for these arguments if they are off the end
of the `argv[]` array.

Reviewed-by: George Wilson <[email protected]>
Reviewed-by: John Kennedy <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Allan Jude <[email protected]>
Signed-off-by: Matthew Ahrens <[email protected]>
Closes openzfs#12339
behlendorf pushed a commit to behlendorf/zfs that referenced this pull request Aug 24, 2021
`zpool_do_import()` passes `argv[0]`, (optionally) `argv[1]`, and
`pool_specified` to `import_pools()`.  If `pool_specified==FALSE`, the
`argv[]` arguments are not used.  However, these values may be off the
end of the `argv[]` array, so loading them could dereference unmapped
memory.  This error is reported by the asan build:

```
=================================================================
==6003==ERROR: AddressSanitizer: heap-buffer-overflow
READ of size 8 at 0x6030000004a8 thread T0
    #0 0x562a078b50eb in zpool_do_import zpool_main.c:3796
    #1 0x562a078858c5 in main zpool_main.c:10709
    #2 0x7f5115231bf6 in __libc_start_main
    #3 0x562a07885eb9 in _start

0x6030000004a8 is located 0 bytes to the right of 24-byte region
allocated by thread T0 here:
    #0 0x7f5116ac6b40 in __interceptor_malloc
    #1 0x562a07885770 in main zpool_main.c:10699
    #2 0x7f5115231bf6 in __libc_start_main
```

This commit passes NULL for these arguments if they are off the end
of the `argv[]` array.

Reviewed-by: George Wilson <[email protected]>
Reviewed-by: John Kennedy <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Allan Jude <[email protected]>
Signed-off-by: Matthew Ahrens <[email protected]>
Closes openzfs#12339
behlendorf pushed a commit to behlendorf/zfs that referenced this pull request Aug 24, 2021
`zpool_do_import()` passes `argv[0]`, (optionally) `argv[1]`, and
`pool_specified` to `import_pools()`.  If `pool_specified==FALSE`, the
`argv[]` arguments are not used.  However, these values may be off the
end of the `argv[]` array, so loading them could dereference unmapped
memory.  This error is reported by the asan build:

```
=================================================================
==6003==ERROR: AddressSanitizer: heap-buffer-overflow
READ of size 8 at 0x6030000004a8 thread T0
    #0 0x562a078b50eb in zpool_do_import zpool_main.c:3796
    #1 0x562a078858c5 in main zpool_main.c:10709
    #2 0x7f5115231bf6 in __libc_start_main
    #3 0x562a07885eb9 in _start

0x6030000004a8 is located 0 bytes to the right of 24-byte region
allocated by thread T0 here:
    #0 0x7f5116ac6b40 in __interceptor_malloc
    #1 0x562a07885770 in main zpool_main.c:10699
    #2 0x7f5115231bf6 in __libc_start_main
```

This commit passes NULL for these arguments if they are off the end
of the `argv[]` array.

Reviewed-by: George Wilson <[email protected]>
Reviewed-by: John Kennedy <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Allan Jude <[email protected]>
Signed-off-by: Matthew Ahrens <[email protected]>
Closes openzfs#12339
behlendorf pushed a commit that referenced this pull request Aug 31, 2021
`zpool_do_import()` passes `argv[0]`, (optionally) `argv[1]`, and
`pool_specified` to `import_pools()`.  If `pool_specified==FALSE`, the
`argv[]` arguments are not used.  However, these values may be off the
end of the `argv[]` array, so loading them could dereference unmapped
memory.  This error is reported by the asan build:

```
=================================================================
==6003==ERROR: AddressSanitizer: heap-buffer-overflow
READ of size 8 at 0x6030000004a8 thread T0
    #0 0x562a078b50eb in zpool_do_import zpool_main.c:3796
    #1 0x562a078858c5 in main zpool_main.c:10709
    #2 0x7f5115231bf6 in __libc_start_main
    #3 0x562a07885eb9 in _start

0x6030000004a8 is located 0 bytes to the right of 24-byte region
allocated by thread T0 here:
    #0 0x7f5116ac6b40 in __interceptor_malloc
    #1 0x562a07885770 in main zpool_main.c:10699
    #2 0x7f5115231bf6 in __libc_start_main
```

This commit passes NULL for these arguments if they are off the end
of the `argv[]` array.

Reviewed-by: George Wilson <[email protected]>
Reviewed-by: John Kennedy <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Allan Jude <[email protected]>
Signed-off-by: Matthew Ahrens <[email protected]>
Closes #12339
tonyhutter pushed a commit to tonyhutter/zfs that referenced this pull request Sep 15, 2021
`zpool_do_import()` passes `argv[0]`, (optionally) `argv[1]`, and
`pool_specified` to `import_pools()`.  If `pool_specified==FALSE`, the
`argv[]` arguments are not used.  However, these values may be off the
end of the `argv[]` array, so loading them could dereference unmapped
memory.  This error is reported by the asan build:

```
=================================================================
==6003==ERROR: AddressSanitizer: heap-buffer-overflow
READ of size 8 at 0x6030000004a8 thread T0
    #0 0x562a078b50eb in zpool_do_import zpool_main.c:3796
    #1 0x562a078858c5 in main zpool_main.c:10709
    #2 0x7f5115231bf6 in __libc_start_main
    #3 0x562a07885eb9 in _start

0x6030000004a8 is located 0 bytes to the right of 24-byte region
allocated by thread T0 here:
    #0 0x7f5116ac6b40 in __interceptor_malloc
    #1 0x562a07885770 in main zpool_main.c:10699
    #2 0x7f5115231bf6 in __libc_start_main
```

This commit passes NULL for these arguments if they are off the end
of the `argv[]` array.

Reviewed-by: George Wilson <[email protected]>
Reviewed-by: John Kennedy <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Allan Jude <[email protected]>
Signed-off-by: Matthew Ahrens <[email protected]>
Closes openzfs#12339
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
Status: Accepted Ready to integrate (reviewed, tested)
Projects
None yet
Development

Successfully merging this pull request may close these issues.

None yet

5 participants