Riskcovery

CVE-2024-36920

scsi: mpi3mr: Avoid memcpy field-spanning write WARNING

State
Published
Severity
Not scored
Published
May 30, 2024
Updated
May 11, 2026
Reserved
May 30, 2024

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

scsi: mpi3mr: Avoid memcpy field-spanning write WARNING

When the "storcli2 show" command is executed for eHBA-9600, mpi3mr driver prints this WARNING message:

memcpy: detected field-spanning write (size 128) of single field "bsg_reply_buf->reply_buf" at drivers/scsi/mpi3mr/mpi3mr_app.c:1658 (size 1) WARNING: CPU: 0 PID: 12760 at drivers/scsi/mpi3mr/mpi3mr_app.c:1658 mpi3mr_bsg_request+0x6b12/0x7f10 [mpi3mr]

The cause of the WARN is 128 bytes memcpy to the 1 byte size array "__u8 replay_buf[1]" in the struct mpi3mr_bsg_in_reply_buf. The array is intended to be a flexible length array, so the WARN is a false positive.

To suppress the WARN, remove the constant number '1' from the array declaration and clarify that it has flexible length. Also, adjust the memory allocation size to match the change.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • c4f7ac64616ee513f9ac4ae6c4d8c3cccb6974df to before 5f0266044dc611563539705bff0b3e1545fbb6aaAffected
  • c4f7ac64616ee513f9ac4ae6c4d8c3cccb6974df to before f09318244c6cafd10aca741b9c01e0a2c362d43aAffected
  • c4f7ac64616ee513f9ac4ae6c4d8c3cccb6974df to before 4d2772324f43cf5674ac3dbe3f74a7e656396716Affected
  • c4f7ac64616ee513f9ac4ae6c4d8c3cccb6974df to before 429846b4b6ce9853e0d803a2357bb2e55083adf0Affected
LinuxLinux
  • 5.14Affected
  • before 5.14Not affected
  • 6.1.91 through 6.1.*Not affected
  • 6.6.31 through 6.6.*Not affected
  • 6.8.10 through 6.8.*Not affected
  • 6.9 and laterNot affected

References

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