CVE-2022-50225

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> riscv:uprobe fix SR_SPIE set/clear handling<br /> <br /> In riscv the process of uprobe going to clear spie before exec<br /> the origin insn,and set spie after that.But When access the page<br /> which origin insn has been placed a page fault may happen and<br /> irq was disabled in arch_uprobe_pre_xol function,It cause a WARN<br /> as follows.<br /> There is no need to clear/set spie in arch_uprobe_pre/post/abort_xol.<br /> We can just remove it.<br /> <br /> [ 31.684157] BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1488<br /> [ 31.684677] in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 76, name: work<br /> [ 31.684929] preempt_count: 0, expected: 0<br /> [ 31.685969] CPU: 2 PID: 76 Comm: work Tainted: G<br /> [ 31.686542] Hardware name: riscv-virtio,qemu (DT)<br /> [ 31.686797] Call Trace:<br /> [ 31.687053] [] dump_backtrace+0x30/0x38<br /> [ 31.687699] [] show_stack+0x40/0x4c<br /> [ 31.688141] [] dump_stack_lvl+0x44/0x5c<br /> [ 31.688396] [] dump_stack+0x18/0x20<br /> [ 31.688653] [] __might_resched+0x114/0x122<br /> [ 31.688948] [] __might_sleep+0x50/0x7a<br /> [ 31.689435] [] down_read+0x30/0x130<br /> [ 31.689728] [] do_page_fault+0x166/x446<br /> [ 31.689997] [] ret_from_exception+0x0/0xc