CVE-2024-44982

In the Linux kernel, the following vulnerability has been resolved:

drm/msm/dpu: cleanup FB if dpuformatpopulate_layout fails

If the dpuformatpopulatelayout() fails, then FB is prepared, but not cleaned up. This ends up leaking the pincount on the GEM object and causes a splat during DRM file closure:

msmobj->pincount WARNING: CPU: 2 PID: 569 at drivers/gpu/drm/msm/msmgem.c:121 updatelrulocked+0xc4/0xcc [...] Call trace: updatelrulocked+0xc4/0xcc putpages+0xac/0x100 msmgemfreeobject+0x138/0x180 drmgemobjectfree+0x1c/0x30 drmgemobjecthandleputunlocked+0x108/0x10c drmgemobjectreleasehandle+0x58/0x70 idrforeach+0x68/0xec drmgemrelease+0x28/0x40 drmfilefree+0x174/0x234 drmrelease+0xb0/0x160 _fput+0xc0/0x2c8 _fputsync+0x50/0x5c _arm64sysclose+0x38/0x7c invokesyscall+0x48/0x118 el0svccommon.constprop.0+0x40/0xe0 doel0svc+0x1c/0x28 el0svc+0x4c/0x120 el0t64synchandler+0x100/0x12c el0t64sync+0x190/0x194 irq event stamp: 129818 hardirqs last enabled at (129817): [<ffffa5f6d953fcc0>] consoleunlock+0x118/0x124 hardirqs last disabled at (129818): [<ffffa5f6da7dcf04>] el1dbg+0x24/0x8c softirqs last enabled at (129808): [<ffffa5f6d94afc18>] handlesoftirqs+0x4c8/0x4e8 softirqs last disabled at (129785): [<ffffa5f6d94105e4>] _dosoftirq+0x14/0x20

Patchwork: https://patchwork.freedesktop.org/patch/600714/