CVE-2024-35920

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> media: mediatek: vcodec: adding lock to protect decoder context list<br /> <br /> Add a lock for the ctx_list, to avoid accessing a NULL pointer<br /> within the &amp;#39;vpu_dec_ipi_handler&amp;#39; function when the ctx_list has<br /> been deleted due to an unexpected behavior on the SCP IP block.<br /> <br /> Hardware name: Google juniper sku16 board (DT)<br /> pstate: 20400005 (nzCv daif +PAN -UAO -TCO BTYPE=--)<br /> pc : vpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec]<br /> lr : scp_ipi_handler+0xd0/0x194 [mtk_scp]<br /> sp : ffffffc0131dbbd0<br /> x29: ffffffc0131dbbd0 x28: 0000000000000000<br /> x27: ffffff9bb277f348 x26: ffffff9bb242ad00<br /> x25: ffffffd2d440d3b8 x24: ffffffd2a13ff1d4<br /> x23: ffffff9bb7fe85a0 x22: ffffffc0133fbdb0<br /> x21: 0000000000000010 x20: ffffff9b050ea328<br /> x19: ffffffc0131dbc08 x18: 0000000000001000<br /> x17: 0000000000000000 x16: ffffffd2d461c6e0<br /> x15: 0000000000000242 x14: 000000000000018f<br /> x13: 000000000000004d x12: 0000000000000000<br /> x11: 0000000000000001 x10: fffffffffffffff0<br /> x9 : ffffff9bb6e793a8 x8 : 0000000000000000<br /> x7 : 0000000000000000 x6 : 000000000000003f<br /> x5 : 0000000000000040 x4 : fffffffffffffff0<br /> x3 : 0000000000000020 x2 : ffffff9bb6e79080<br /> x1 : 0000000000000010 x0 : ffffffc0131dbc08<br /> Call trace:<br /> vpu_dec_ipi_handler+0x58/0x1f8 [mtk_vcodec_dec (HASH:6c3f 2)]<br /> scp_ipi_handler+0xd0/0x194 [mtk_scp (HASH:7046 3)]<br /> mt8183_scp_irq_handler+0x44/0x88 [mtk_scp (HASH:7046 3)]<br /> scp_irq_handler+0x48/0x90 [mtk_scp (HASH:7046 3)]<br /> irq_thread_fn+0x38/0x94<br /> irq_thread+0x100/0x1c0<br /> kthread+0x140/0x1fc<br /> ret_from_fork+0x10/0x30<br /> Code: 54000088 f94ca50a eb14015f 54000060 (f9400108)<br /> ---[ end trace ace43ce36cbd5c93 ]---<br /> Kernel panic - not syncing: Oops: Fatal exception<br /> SMP: stopping secondary CPUs<br /> Kernel Offset: 0x12c4000000 from 0xffffffc010000000<br /> PHYS_OFFSET: 0xffffffe580000000<br /> CPU features: 0x08240002,2188200c<br /> Memory Limit: none