diff options
Diffstat (limited to 'arch/um/kernel')
| -rw-r--r-- | arch/um/kernel/physmem.c | 1 | ||||
| -rw-r--r-- | arch/um/kernel/process.c | 2 | ||||
| -rw-r--r-- | arch/um/kernel/tlb.c | 9 | ||||
| -rw-r--r-- | arch/um/kernel/trap.c | 2 |
4 files changed, 11 insertions, 3 deletions
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c index f116db15d40..30fdd5d0067 100644 --- a/arch/um/kernel/physmem.c +++ b/arch/um/kernel/physmem.c @@ -103,6 +103,7 @@ void __init setup_physmem(unsigned long start, unsigned long reserve_end, */ os_seek_file(physmem_fd, __pa(&__syscall_stub_start)); os_write_file(physmem_fd, &__syscall_stub_start, PAGE_SIZE); + os_fsync_file(physmem_fd); bootmap_size = init_bootmem(pfn, pfn + delta); free_bootmem(__pa(reserve_end) + bootmap_size, diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index eecc4142764..f17bca8ed2c 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -359,7 +359,7 @@ int singlestepping(void * t) /* * Only x86 and x86_64 have an arch_align_stack(). * All other arches have "#define arch_align_stack(x) (x)" - * in their asm/system.h + * in their asm/exec.h * As this is included in UML from asm-um/system-generic.h, * we can use it to behave as the subarch does. */ diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c index 9472079471b..f1b3eb14b85 100644 --- a/arch/um/kernel/tlb.c +++ b/arch/um/kernel/tlb.c @@ -12,6 +12,7 @@ #include <mem_user.h> #include <os.h> #include <skas.h> +#include <kern_util.h> struct host_vm_change { struct host_vm_op { @@ -124,6 +125,9 @@ static int add_munmap(unsigned long addr, unsigned long len, struct host_vm_op *last; int ret = 0; + if ((addr >= STUB_START) && (addr < STUB_END)) + return -EINVAL; + if (hvc->index != 0) { last = &hvc->ops[hvc->index - 1]; if ((last->type == MUNMAP) && @@ -283,8 +287,11 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr, /* This is not an else because ret is modified above */ if (ret) { printk(KERN_ERR "fix_range_common: failed, killing current " - "process\n"); + "process: %d\n", task_tgid_vnr(current)); + /* We are under mmap_sem, release it such that current can terminate */ + up_write(¤t->mm->mmap_sem); force_sig(SIGKILL, current); + do_signal(); } } diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index 974b87474a9..5678c3571e7 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -206,7 +206,7 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, int is_write = FAULT_WRITE(fi); unsigned long address = FAULT_ADDRESS(fi); - if (regs) + if (!is_user && regs) current->thread.segv_regs = container_of(regs, struct pt_regs, regs); if (!is_user && (address >= start_vm) && (address < end_vm)) { |