CVE-2026-23128

En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:<br /> <br /> arm64: Establecer __nocfi en swsusp_arch_resume()<br /> <br /> Se informa de un DABT[1] en un sistema basado en Android al reanudar desde la hibernación. Esto ocurre porque swsusp_arch_suspend_exit() está marcado con SYM_CODE_*() y no tiene un hash CFI, pero swsusp_arch_resume() intentará verificar el hash CFI al llamar a una copia de swsusp_arch_suspend_exit().<br /> <br /> Dado que existe un requisito de que el punto de entrada a swsusp_arch_suspend_exit() es el primer byte de la sección .hibernate_exit.text, no podemos solucionar esto marcando swsusp_arch_suspend_exit() con SYM_FUNC_*(). La solución más sencilla por ahora es deshabilitar la verificación CFI en swsusp_arch_resume().<br /> <br /> Marcar swsusp_arch_resume() como __nocfi para deshabilitar la verificación CFI.<br /> <br /> [1]<br /> [ 22.991934][ T1] Unable to handle kernel paging request at virtual address 0000000109170ffc<br /> [ 22.991934][ T1] Mem abort info:<br /> [ 22.991934][ T1] ESR = 0x0000000096000007<br /> [ 22.991934][ T1] EC = 0x25: DABT (current EL), IL = 32 bits<br /> [ 22.991934][ T1] SET = 0, FnV = 0<br /> [ 22.991934][ T1] EA = 0, S1PTW = 0<br /> [ 22.991934][ T1] FSC = 0x07: level 3 translation fault<br /> [ 22.991934][ T1] Data abort info:<br /> [ 22.991934][ T1] ISV = 0, ISS = 0x00000007, ISS2 = 0x00000000<br /> [ 22.991934][ T1] CM = 0, WnR = 0, TnD = 0, TagAccess = 0<br /> [ 22.991934][ T1] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0<br /> [ 22.991934][ T1] [0000000109170ffc] user address but active_mm is swapper<br /> [ 22.991934][ T1] Internal error: Oops: 0000000096000007 [#1] PREEMPT SMP<br /> [ 22.991934][ T1] Dumping ftrace buffer:<br /> [ 22.991934][ T1] (ftrace buffer empty)<br /> [ 22.991934][ T1] Modules linked in:<br /> [ 22.991934][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.6.98-android15-8-g0b1d2aee7fc3-dirty-4k #1 688c7060a825a3ac418fe53881730b355915a419<br /> [ 22.991934][ T1] Hardware name: Unisoc UMS9360-base Board (DT)<br /> [ 22.991934][ T1] pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)<br /> [ 22.991934][ T1] pc : swsusp_arch_resume+0x2ac/0x344<br /> [ 22.991934][ T1] lr : swsusp_arch_resume+0x294/0x344<br /> [ 22.991934][ T1] sp : ffffffc08006b960<br /> [ 22.991934][ T1] x29: ffffffc08006b9c0 x28: 0000000000000000 x27: 0000000000000000<br /> [ 22.991934][ T1] x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000820<br /> [ 22.991934][ T1] x23: ffffffd0817e3000 x22: ffffffd0817e3000 x21: 0000000000000000<br /> [ 22.991934][ T1] x20: ffffff8089171000 x19: ffffffd08252c8c8 x18: ffffffc080061058<br /> [ 22.991934][ T1] x17: 00000000529c6ef0 x16: 00000000529c6ef0 x15: 0000000000000004<br /> [ 22.991934][ T1] x14: ffffff8178c88000 x13: 0000000000000006 x12: 0000000000000000<br /> [ 22.991934][ T1] x11: 0000000000000015 x10: 0000000000000001 x9 : ffffffd082533000<br /> [ 22.991934][ T1] x8 : 0000000109171000 x7 : 205b5d3433393139 x6 : 392e32322020205b<br /> [ 22.991934][ T1] x5 : 000000010916f000 x4 : 000000008164b000 x3 : ffffff808a4e0530<br /> [ 22.991934][ T1] x2 : ffffffd08058e784 x1 : 0000000082326000 x0 : 000000010a283000<br /> [ 22.991934][ T1] Call trace:<br /> [ 22.991934][ T1] swsusp_arch_resume+0x2ac/0x344<br /> [ 22.991934][ T1] hibernation_restore+0x158/0x18c<br /> [ 22.991934][ T1] load_image_and_restore+0xb0/0xec<br /> [ 22.991934][ T1] software_resume+0xf4/0x19c<br /> [ 22.991934][ T1] software_resume_initcall+0x34/0x78<br /> [ 22.991934][ T1] do_one_initcall+0xe8/0x370<br /> [ 22.991934][ T1] do_initcall_level+0xc8/0x19c<br /> [ 22.991934][ T1] do_initcalls+0x70/0xc0<br /> [ 22.991934][ T1] do_basic_setup+0x1c/0x28<br /> [ 22.991934][ T1] kernel_init_freeable+0xe0/0x148<br /> [ 22.991934][ T1] kernel_init+0x20/0x1a8<br /> [ 22.991934][ T1] ret_from_fork+0x10/0x20<br /> [ 22.991934][ T1] Code: a9400a61 f94013e0 f9438923 f9400a64 (b85fc110)<br /> <br /> [catalin.marinas@arm.com: commit log updated by Mark Rutland]