CVE-2026-98522

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

drm/imagination: Propagate map failures correctly from pvr mmu map sgl()

Map failure from pvr mmu map sgl() interface was not returned correctly to pvr mmu map() interface. This resulted in pvr mmu map() interface to continue instead of returning an error to caller. Fix it by returning a proper error code from pvr mmu map sgl() interface.

Call stack for crash: [ 1179.286237] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 [ 1179.295067] Mem abort info: [ 1179.297877] ESR = 0x0000000096000004 [ 1179.301656] EC = 0x25: DABT (current EL), IL = 32 bits [ 1179.306987] SET = 0, FnV = 0 [ 1179.310048] EA = 0, S1PTW = 0 [ 1179.313198] FSC = 0x04: level 0 translation fault [ 1179.318096] Data abort info: [ 1179.320993] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 [ 1179.326483] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 1179.331546] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 1179.336895] user pgtable: 4k pages, 48-bit VAs, pgdp=000000009822a000 [ 1179.343402] [0000000000000008] pgd=0000000000000000, p4d=0000000000000000 [ 1179.350243] Internal error: Oops: 0000000096000004 [#2] SMP [ 1179.355908] Modules linked in: powervr gpu sched drm shmem helper drm gpuvm drm exec xhci plat hcd xhci hcd dwc3 usbcore usb common snd soc simple card snd soc simple card utils dwc3 am62 at24 sa2ul sha512 libsha512 sha256 authenc sch fq codel fuse dm mod ipv6 [ 1179.378992] CPU: 1 UID: 1000 PID: 680 Comm: deqp-vk Tainted: G D 6.17.0 #1 PREEMPT [ 1179.388120] Tainted: [D]=DIE [ 1179.390994] Hardware name: Texas Instruments AM625 SK (DT) [ 1179.396467] pstate: 00000005 (nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 1179.403415] pc : pvr mmu op context unmap curr page+0x6c/0x134 [powervr] [ 1179.410140] lr : pvr mmu op context unmap curr page+0x58/0x134 [powervr] [ 1179.416848] sp : ffff8000839ab8c0 [ 1179.420153] x29: ffff8000839ab8c0 x28: 0000000000000001 x27: 000000008f386000 [ 1179.427283] x26: ffff000016d1df98 x25: 0000000000247000 x24: 00000000000001e6 [ 1179.434413] x23: 0000000000000002 x22: 000000000000ffff x21: 0000000000000247 [ 1179.441540] x20: 0000000000000245 x19: ffff000016d1df60 x18: 0000000000000002 [ 1179.448668] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000001 [ 1179.455793] x14: 0000000000060810 x13: ffff80007fffffff x12: ffff000004190480 [ 1179.462921] x11: ffff8000853f7000 x10: ffff8000811ae000 x9 : ffff0000041900b8 [ 1179.470051] x8 : 0000000000000000 x7 : 00000000990c4001 x6 : 0000000000000007 [ 1179.477177] x5 : ffff000016d1df60 x4 : 0000000000000000 x3 : ffff00000a7d8000 [ 1179.484306] x2 : 00000000000001ff x1 : 0000000000000000 x0 : 0000000000000000 [ 1179.491433] Call trace: [ 1179.493872] pvr mmu op context unmap curr page+0x6c/0x134 [powervr] (P) [ 1179.500582] pvr mmu map+0x31c/0x388 [powervr] [ 1179.505027] pvr vm gpuva map+0x40/0x88 [powervr] [ 1179.509732] drm gpuvm sm map+0x250/0x44c [drm gpuvm] [ 1179.514952] drm gpuvm sm map+0x48/0x5c [drm gpuvm] [ 1179.519822] pvr vm bind op exec+0x64/0x70 [powervr] [ 1179.524785] pvr vm map+0x1f8/0x2a8 [powervr] [ 1179.529142] pvr ioctl vm map+0x12c/0x188 [powervr] [ 1179.534018] drm ioctl kernel+0xb8/0x128 [ 1179.537941] drm ioctl+0x21c/0x4ec [ 1179.541337] arm64 sys ioctl+0xac/0x108 [ 1179.545344] invoke syscall+0x44/0x100 [ 1179.549091] el0 svc common.constprop.0+0x40/0xe0 [ 1179.553790] do el0 svc+0x1c/0x28 [ 1179.557106] el0 svc+0x34/0xf0 [ 1179.560159] el0t 64 sync handler+0xd0/0xe4 [ 1179.564334] el0t 64 sync+0x198/0x19c [ 1179.567996] Code: 54000300 35000360 f9402261 79409a62 (f9400421) [ 1179.574081] ---[ end trace 0000000000000000 ]---