CVE-2024-58094

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.