riscv: fix locking violation in page fault handler
When a user mode process accesses an address in the vmalloc area
do_page_fault tries to unlock the mmap semaphore when it isn't locked.
Signed-off-by: Andreas Schwab <schwab@suse.de>
[Palmer: Duplicated code instead of a goto]
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c
index 26293bc..cec8be9 100644
--- a/arch/riscv/mm/fault.c
+++ b/arch/riscv/mm/fault.c
@@ -229,8 +229,9 @@
pte_t *pte_k;
int index;
+ /* User mode accesses just cause a SIGSEGV */
if (user_mode(regs))
- goto bad_area;
+ return do_trap(regs, SIGSEGV, code, addr, tsk);
/*
* Synchronize this task's top level page-table
