* Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> [230620 08:26]:
> Hello Liam,
>
> On (23/06/12 16:39), Liam R. Howlett wrote:
> [..]
> > @@ -2450,17 +2452,17 @@ do_vmi_align_munmap(struct vma_iterator *vmi, struct vm_area_struct *vma,
> > #if defined(CONFIG_DEBUG_VM_MAPLE_TREE)
> > /* Make sure no VMAs are about to be lost. */
> > {
> > - MA_STATE(test, &mt_detach, start, end - 1);
> > + MA_STATE(test, &mt_detach, 0, 0);
> > struct vm_area_struct *vma_mas, *vma_test;
> > int test_count = 0;
> >
> > vma_iter_set(vmi, start);
> > rcu_read_lock();
> > - vma_test = mas_find(&test, end - 1);
> > + vma_test = mas_find(&test, count - 1);
> > for_each_vma_range(*vmi, vma_mas, end) {
> > BUG_ON(vma_mas != vma_test);
> > test_count++;
> > - vma_test = mas_next(&test, end - 1);
> > + vma_test = mas_next(&test, count - 1);
> > }
> > rcu_read_unlock();
> > BUG_ON(count != test_count);
>
> Something isn't quite working, I'm hitting BUG_ON(vma_mas != vma_test)
Is this with next by any chance? There's a merge conflict which I'll
have to fix, but I won't be getting to it in time so the patches will
not make this merge window.
>
> [ 8.156437] ------------[ cut here ]------------
> [ 8.160473] kernel BUG at mm/mmap.c:2439!
> [ 8.163894] invalid opcode: 0000 [#1] PREEMPT SMP PTI
>
> RIP: 0010:do_vmi_align_munmap+0x489/0x8a0
>
> [ 8.207867] Call Trace:
> [ 8.208463] <TASK>
> [ 8.209018] ? die+0x32/0x80
> [ 8.209709] ? do_trap+0xd2/0x100
> [ 8.210520] ? do_vmi_align_munmap+0x489/0x8a0
> [ 8.211576] ? do_vmi_align_munmap+0x489/0x8a0
> [ 8.212639] ? do_error_trap+0x94/0x110
> [ 8.213549] ? do_vmi_align_munmap+0x489/0x8a0
> [ 8.214581] ? exc_invalid_op+0x49/0x60
> [ 8.215494] ? do_vmi_align_munmap+0x489/0x8a0
> [ 8.216576] ? asm_exc_invalid_op+0x16/0x20
> [ 8.217562] ? do_vmi_align_munmap+0x489/0x8a0
> [ 8.218626] do_vmi_munmap+0xc7/0x120
> [ 8.219494] __vm_munmap+0xaa/0x1c0
> [ 8.220370] __x64_sys_munmap+0x17/0x20
> [ 8.221275] do_syscall_64+0x34/0x80
> [ 8.222165] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> [ 8.223359] RIP: 0033:0x7fdb0e2fca97
> [ 8.224224] Code: ff ff ff ff c3 66 0f 1f 44 00 00 f7 d8 89 05 20 28 01 00 48 c7 c0 ff ff ff ff c3 0f 1f 84 00 00 00 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d f9 27 01 00 f7 d8 89 01 48 83
> [ 8.228432] RSP: 002b:00007ffd15458348 EFLAGS: 00000202 ORIG_RAX: 000000000000000b
> [ 8.230175] RAX: ffffffffffffffda RBX: 0000562081a347b0 RCX: 00007fdb0e2fca97
> [ 8.231833] RDX: 0000000000000002 RSI: 0000000000004010 RDI: 00007fdb0e2d5000
> [ 8.233513] RBP: 00007ffd154584d0 R08: 0000000000000000 R09: 0000562081a3fd30
> [ 8.235178] R10: 0000562081a3fd18 R11: 0000000000000202 R12: 00007ffd15458388
> [ 8.236861] R13: 00007ffd15458438 R14: 00007ffd15458370 R15: 0000562081a347b0
