UBUNTU-CVE-2024-58094

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UBUNTU-CVE-2024-58094

Summary:

Details: 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.

References: https://ubuntu.com/security/CVE-2024-58094, https://www.cve.org/CVERecord?id=CVE-2024-58094, https://git.kernel.org/linus/b5799dd77054c1ec49b0088b006c9908e256843b, https://git.kernel.org/stable/c/b5799dd77054c1ec49b0088b006c9908e256843b, https://git.kernel.org/stable/c/f605bc3e162f5c6faa9bd3602ce496053d06a4bb, https://ubuntu.com/security/notices/USN-7594-1, https://ubuntu.com/security/notices/USN-7594-2, https://ubuntu.com/security/notices/USN-7594-3