Description
In the Linux kernel, the following vulnerability has been resolved: drm/lima: call drm_mm_init() with a valid allocation range lima_vm_create() is currently run before va_start and va_end are set up, meaning they are both 0. lima_vm_create() runs drm_mm_init() with them as arguments for the allocator, and if DRM_DEBUG_MM is enabled the DRM_MM_BUG_ON check in drm_mm_init then fires, as seen here on exynos4412-odroid-u2: [ 1.736297] ------------[ cut here ]------------ [ 1.740370] kernel BUG at drivers/gpu/drm/drm_mm.c:931! [ 1.745574] Internal error: Oops - BUG: 0 [#1] SMP ARM [ 1.750697] Modules linked in: [ 1.753734] CPU: 0 UID: 0 PID: 41 Comm: kworker/u16:1 Not tainted 7.0.10-postmarketos-exynos4 #11 PREEMPT [ 1.763372] Hardware name: Samsung Exynos (Flattened Device Tree) [ 1.769446] Workqueue: events_unbound deferred_probe_work_func [ 1.775261] PC is at drm_mm_init+0x9c/0xa4 [ 1.779339] LR is at lima_vm_create+0x144/0x17c [ ... ] Fix the issue by moving the lima_vm_create() call after va_start and va_end are set up.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
a1d2a6339961efc078208dc3b2f006e9e9a8e119 to < af1f276d50c9d7ebcd25770f358ca503a89d96d7affecteda1d2a6339961efc078208dc3b2f006e9e9a8e119 to < fd6bc5f1d6b54047b06b82bab25a7e21e4b1c95aaffecteda1d2a6339961efc078208dc3b2f006e9e9a8e119 to < ad4e908096dff97646f77b04e2e2825225e215f7affecteda1d2a6339961efc078208dc3b2f006e9e9a8e119 to < 788917ba77f5d69bd368c1d176ecceda346a2951affecteda1d2a6339961efc078208dc3b2f006e9e9a8e119 to < 79a3331ee436c8b1454f897d539606c9b5ebdf9faffecteda1d2a6339961efc078208dc3b2f006e9e9a8e119 to < e2a7cee341986cb5b544a8286edc7fb0494c592eaffecteda1d2a6339961efc078208dc3b2f006e9e9a8e119 to < e0773ad25a34a49aece176721c466cf214e02222affecteda1d2a6339961efc078208dc3b2f006e9e9a8e119 to < 3b3bce4a692ac60d9f4a341e6b597dd1fd0a28f9affected
Linux Linux
Default version status: affected
5.2affected0 to < 5.2unaffected5.10.270 to ≤ 5.10.*unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/af1f276d50c9d7ebcd25770f358ca503a89d96d7 ↗
- https://git.kernel.org/stable/c/fd6bc5f1d6b54047b06b82bab25a7e21e4b1c95a ↗
- https://git.kernel.org/stable/c/ad4e908096dff97646f77b04e2e2825225e215f7 ↗
- https://git.kernel.org/stable/c/788917ba77f5d69bd368c1d176ecceda346a2951 ↗
- https://git.kernel.org/stable/c/79a3331ee436c8b1454f897d539606c9b5ebdf9f ↗
- https://git.kernel.org/stable/c/e2a7cee341986cb5b544a8286edc7fb0494c592e ↗
- https://git.kernel.org/stable/c/e0773ad25a34a49aece176721c466cf214e02222 ↗
- https://git.kernel.org/stable/c/3b3bce4a692ac60d9f4a341e6b597dd1fd0a28f9 ↗