Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm: fix race between partial drm_dev_register() failure and ioctl If drm_dev_register() fails after registering a minor (e.g. render minor registered, primary minor fails), userspace could have opened the first minor and entered a drm_dev_enter() critical section. Since the unplugged flag was never set, the ioctl proceeds while the error path tears down device resources. Fix this by introducing drm_dev_synchronize_unplug(), which sets the unplugged flag and waits for the SRCU barrier, ensuring all in-flight drm_dev_enter() critical sections complete before cleanup proceeds; call it on the error path of drm_dev_register().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected bee330f3d67273a68dcb99f59480d59553c008b2 before 26d9162213952927cd59c0d94b7e0e992b347bec; affected bee330f3d67273a68dcb99f59480d59553c008b2 before 24d28d15c0f7f7d4a1c229f8730314f0f8758810; affected bee330f3d67273a68dcb99f59480d59553c008b2 before 6729990df9e70623bf53f855b521ae71ca9cb278; affected bee330f3d67273a68dcb99f59480d59553c008b2 before a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c; affected bee330f3d67273a68dcb99f59480d59553c008b2 before 19dbfe4d586aecfed121cb3fa62281761d9d341f; affected bee330f3d67273a68dcb99f59480d59553c008b2 before 79d09cfe90304ff4f195e47d569800f5e0f8b854; affected bee330f3d67273a68dcb99f59480d59553c008b2 before 2d1215a72159d00001e08dee162e27718934bee9; affected bee330f3d67273a68dcb99f59480d59553c008b2 before eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e |
| Linux / Linux | affected 4.18; unaffected 0 before 4.18; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/26d9162213952927cd59c0d94b7e0e992b347bec
- https://git.kernel.org/stable/c/24d28d15c0f7f7d4a1c229f8730314f0f8758810
- https://git.kernel.org/stable/c/6729990df9e70623bf53f855b521ae71ca9cb278
- https://git.kernel.org/stable/c/a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c
- https://git.kernel.org/stable/c/19dbfe4d586aecfed121cb3fa62281761d9d341f
- https://git.kernel.org/stable/c/79d09cfe90304ff4f195e47d569800f5e0f8b854
- https://git.kernel.org/stable/c/2d1215a72159d00001e08dee162e27718934bee9
- https://git.kernel.org/stable/c/eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e