CVE-2022-50225

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

riscv:uprobe fix SR_SPIE set/clear handling

In riscv the process of uprobe going to clear spie before exec the origin insn,and set spie after that.But When access the page which origin insn has been placed a page fault may happen and irq was disabled in archuprobeprexol function,It cause a WARN as follows. There is no need to clear/set spie in archuprobepre/post/abortxol. We can just remove it.

[ 31.684157] BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1488 [ 31.684677] inatomic(): 0, irqsdisabled(): 1, nonblock: 0, pid: 76, name: work [ 31.684929] preemptcount: 0, expected: 0 [ 31.685969] CPU: 2 PID: 76 Comm: work Tainted: G [ 31.686542] Hardware name: riscv-virtio,qemu (DT) [ 31.686797] Call Trace: [ 31.687053] [<ffffffff80006442>] dumpbacktrace+0x30/0x38 [ 31.687699] [<ffffffff80812118>] showstack+0x40/0x4c [ 31.688141] [<ffffffff8081817a>] dumpstacklvl+0x44/0x5c [ 31.688396] [<ffffffff808181aa>] dump_stack+0x18/0x20 [ 31.688653] [<ffffffff8003e454>] __might_resched+0x114/0x122 [ 31.688948] [<ffffffff8003e4b2>] __mightsleep+0x50/0x7a [ 31.689435] [<ffffffff80822676>] downread+0x30/0x130 [ 31.689728] [<ffffffff8000b650>] dopagefault+0x166/x446 [ 31.689997] [<ffffffff80003c0c>] retfromexception+0x0/0xc