Yipeng Zou 3dbe582940 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 arch_uprobe_pre_xol function,It cause a WARN as follows. There is no need to clear/set spie in arch_uprobe_pre/post/abort_xol. We can just remove it. [ 31.684157] BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1488 [ 31.684677] in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 76, name: work [ 31.684929] preempt_count: 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>] dump_backtrace+0x30/0x38 [ 31.687699] [<ffffffff80812118>] show_stack+0x40/0x4c [ 31.688141] [<ffffffff8081817a>] dump_stack_lvl+0x44/0x5c [ 31.688396] [<ffffffff808181aa>] dump_stack+0x18/0x20 [ 31.688653] [<ffffffff8003e454>] __might_resched+0x114/0x122 [ 31.688948] [<ffffffff8003e4b2>] __might_sleep+0x50/0x7a [ 31.689435] [<ffffffff80822676>] down_read+0x30/0x130 [ 31.689728] [<ffffffff8000b650>] do_page_fault+0x166/x446 [ 31.689997] [<ffffffff80003c0c>] ret_from_exception+0x0/0xc Fixes: 74784081aa ("riscv: Add uprobes supported") Signed-off-by: Yipeng Zou <zouyipeng@huawei.com> Reviewed-by: Guo Ren <guoren@kernel.org> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20220721065820.245755-1-zouyipeng@huawei.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2022-08-11 14:14:52 -07:00
..
decode-insn.c	riscv: kprobes: implement the branch instructions	2021-07-21 23:22:34 -07:00
decode-insn.h
ftrace.c	ftrace: disable preemption when recursion locked	2021-10-27 11:21:49 -04:00
kprobes_trampoline.S	kprobes: treewide: Make it harder to refer kretprobe_trampoline directly	2021-09-30 21:24:06 -04:00
kprobes.c	kprobes: treewide: Make it harder to refer kretprobe_trampoline directly	2021-09-30 21:24:06 -04:00
Makefile	riscv: Add uprobes supported	2021-01-14 15:09:08 -08:00
simulate-insn.c	riscv: kprobes: implement the branch instructions	2021-07-21 23:22:34 -07:00
simulate-insn.h
uprobes.c	riscv:uprobe fix SR_SPIE set/clear handling	2022-08-11 14:14:52 -07:00