diff options
| -rw-r--r-- | arch/um/kernel/trap.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index 8e4daf44e980..34b633ec852f 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -219,6 +219,11 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, show_regs(container_of(regs, struct pt_regs, regs)); panic("Segfault with no mm"); } + else if (!is_user && address < TASK_SIZE) { + show_regs(container_of(regs, struct pt_regs, regs)); + panic("Kernel tried to access user memory at addr 0x%lx, ip 0x%lx", + address, ip); + } if (SEGV_IS_FIXABLE(&fi)) err = handle_page_fault(address, ip, is_write, is_user, |