In the Linux kernel, the following vulnerability has been resolved:
ocfs2: fix data corruption by fallocate
When fallocate punches holes out of inode size, if original isize is in
the middle of last cluster, then the part from isize to the end of the
cluster will be zeroed with buffer write, at that time isize is not yet
updated to match the new size, if writeback is kicked in, it will invoke
ocfs2_writepage()->block_write_full_page() where the pages out of inode
size will be dropped. That will cause file corruption. Fix this by
zero out eof blocks when extending the inode size.
Running the following command with qemu-image 4.2.1 can get a corrupted
coverted image file easily.
qemu-img convert -p -t none -T none -f qcow2 $qcow_image \
-O qcow2 -o compat=1.1 $qcow_image.conv
The usage of fallocate in qemu is like this, it first punches holes out
of inode size, then extend the inode size.
fallocate(11, FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE, 2276196352, 65536) = 0
fallocate(11, 0, 2276196352, 65536) = 0
v1: https://www.spinics.net/lists/linux-fsdevel/msg193999.html
v2: https://lore.kernel.org/linux-fsdevel/20210525093034.GB4112@quack2.suse.cz/T/
References
Configurations
Configuration 1 (hide)
|
History
04 Apr 2025, 14:39
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/0a31dd6fd2f4e7db538fb6eb1f06973d81f8dd3b - Patch | |
| References | () https://git.kernel.org/stable/c/33e03adafb29eedae1bae9cdb50c1385279fcf65 - Patch | |
| References | () https://git.kernel.org/stable/c/624fa7baa3788dc9e57840ba5b94bc22b03cda57 - Patch | |
| References | () https://git.kernel.org/stable/c/6bba4471f0cc1296fe3c2089b9e52442d3074b2e - Patch | |
| References | () https://git.kernel.org/stable/c/a1700479524bb9cb5e8ae720236a6fabd003acae - Patch | |
| References | () https://git.kernel.org/stable/c/c8d5faee46242c3f33b8a71a4d7d52214785bfcc - Patch | |
| References | () https://git.kernel.org/stable/c/cc2edb99ea606a45182b5ea38cc8f4e583aa0774 - Patch | |
| References | () https://git.kernel.org/stable/c/cec4e857ffaa8c447f51cd8ab4e72350077b6770 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:* |
|
| CWE | NVD-CWE-noinfo | |
| First Time |
Linux linux Kernel
Linux |
21 Nov 2024, 06:35
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/0a31dd6fd2f4e7db538fb6eb1f06973d81f8dd3b - | |
| References | () https://git.kernel.org/stable/c/33e03adafb29eedae1bae9cdb50c1385279fcf65 - | |
| References | () https://git.kernel.org/stable/c/624fa7baa3788dc9e57840ba5b94bc22b03cda57 - | |
| References | () https://git.kernel.org/stable/c/6bba4471f0cc1296fe3c2089b9e52442d3074b2e - | |
| References | () https://git.kernel.org/stable/c/a1700479524bb9cb5e8ae720236a6fabd003acae - | |
| References | () https://git.kernel.org/stable/c/c8d5faee46242c3f33b8a71a4d7d52214785bfcc - | |
| References | () https://git.kernel.org/stable/c/cc2edb99ea606a45182b5ea38cc8f4e583aa0774 - | |
| References | () https://git.kernel.org/stable/c/cec4e857ffaa8c447f51cd8ab4e72350077b6770 - |
05 Nov 2024, 17:35
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| Summary |
|
15 Mar 2024, 21:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-03-15 21:15
Updated : 2025-04-04 14:39
NVD link : CVE-2021-47114
Mitre link : CVE-2021-47114
CVE.ORG link : CVE-2021-47114
JSON object : View
Products Affected
linux
- linux_kernel
CWE