CVE-2024-58094

Summary

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

jfs: add check read-only before truncation in jfs_truncate_nolock()

Added a check for "read-only" mode in the jfs_truncate_nolock function to avoid errors related to writing to a read-only filesystem.

Call stack:

block_write_begin() { jfs_write_failed() { jfs_truncate() { jfs_truncate_nolock() { txEnd() { … log = JFS_SBI(tblk->sb)->log; // (log == NULL)

If the isReadOnly(ip) condition is triggered in jfs_truncate_nolock, the function execution will stop, and no further data modification will occur. Instead, the xtTruncate function will be called with the "COMMIT_WMAP" flag, preventing modifications in "read-only" mode.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/f605bc3e162f5c6faa9bd3602ce496053d06a4bb
• https://git.kernel.org/stable/c/b5799dd77054c1ec49b0088b006c9908e256843b

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