CVE-2025-40242
gfs2: Fix unlikely race in gdlm_put_lock
In the Linux kernel, the following vulnerability has been resolved:
gfs2: Fix unlikely race in gdlm_put_lock
In gdlm_put_lock(), there is a small window of time in which the
DFL_UNMOUNT flag has been set but the lockspace hasn't been released,
yet. In that window, dlm may still call gdlm_ast() and gdlm_bast().
To prevent it from dereferencing freed glock objects, only free the
glock if the lockspace has actually been released.
Affected products
Linux · LinuxWant to know if your infrastructure is exposed to this?
Talk to TrueHacking →References
https://git.kernel.org/stable/c/279bde3bbb0ac0bad5c729dfa85983d75a5d7641https://git.kernel.org/stable/c/28c4d9bc0708956c1a736a9e49fee71b65deee81https://git.kernel.org/stable/c/4913592a3358f6ec366b8346b733d5e2360b08e1https://git.kernel.org/stable/c/5fdc1474e678eea1700aa266c0b7c2c96f81dd0dhttps://git.kernel.org/stable/c/64c61b4ac645222fa7b724cef616c1f862a72a40