Re: Linux 4.12-rc6

[Dave Jones]

On Mon, Jun 19, 2017 at 11:04:15PM +0800, Linus Torvalds wrote:
 
 > And things look fairly normal. Two thirds drivers (rdma stands out,
 > but there's also networking drivers, gpu, hid etc), with the rest
 > being the usual mixture of architecture updates (s390, mips, powerpc,
 > arm, xtemsa) and filesystem (some more ufs work, but also ceph,
 > configfs and xfs), mm, networking and tooling (perf) updates.

 ..

 > Hugh Dickins (1):
 >       mm: larger stack guard gap, between vmas

This seems to be buggered.

002331 00000396712307 0 2 kernel BUG at mm/mmap.c:1963!
002332 00000396712414 0 4 invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC
002333 00000396712541 0 4 CPU: 0 PID: 4572 Comm: trinity-c41 Not tainted 4.12.0-rc6-think+ #1 
002335 00000396712819 0 4 task: ffff8804efca37c0 task.stack: ffffc90001de4000
002336 00000396712959 0 4 RIP: 0010:unmapped_area_topdown+0xa5/0x170
002337 00000396713077 0 4 RSP: 0018:ffffc90001de7d10 EFLAGS: 00010206
002338 00000396713204 0 4 RAX: 00007f7d543d6000 RBX: 00007f7d545d7000 RCX: 0000000000000000
002339 00000396713374 0 4 RDX: 00007f7d543d6000 RSI: 0000000000201000 RDI: ffffc90001de7d50
002340 00000396713542 0 4 RBP: ffffc90001de7d38 R08: 00007f7d54673000 R09: ffff8804f3524e40
002341 00000396713709 0 4 R10: 00007f7d57977000 R11: 0000000000001000 R12: 0000000000100000
002342 00000396713876 0 4 R13: 0000000000202000 R14: 0000000000000000 R15: fffffffffff64000
002343 00000396714041 0 4 FS:  00007f7d57b66700(0000) GS:ffff880507800000(0000) knlGS:0000000000000000
002344 00000396714228 0 4 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
002345 00000396714361 0 4 CR2: 0000562d11923398 CR3: 00000004f38fa000 CR4: 00000000001407f0
002346 00000396714527 0 4 DR0: 00007f7d54a00000 DR1: 0000000000000000 DR2: 0000000000000000
002347 00000396714693 0 4 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
002348 00000396714858 0 4 Call Trace:
002349 00000396714920 0 4  arch_get_unmapped_area_topdown+0x1df/0x230
002350 00000396715045 0 4  get_unmapped_area+0x87/0x120
002351 00000396715138 0 4  do_mmap+0x131/0x430
002352 00000396715218 0 4  vm_mmap_pgoff+0xb9/0x100
002353 00000396715304 0 4  SyS_mmap_pgoff+0x111/0x240
002354 00000396715396 0 4  SyS_mmap+0x1b/0x30
002355 00000396715469 0 4  do_syscall_64+0x66/0x190
002356 00000396715555 0 4  entry_SYSCALL64_slow_path+0x25/0x25
002357 00000396715662 0 4 RIP: 0033:0x7f7d5748f43a
002358 00000396715745 0 4 RSP: 002b:00007fff1df1ee08 EFLAGS: 00000246
002359 00000396715867 0 4 ORIG_RAX: 0000000000000009
002360 00000396715955 0 4 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f7d5748f43a
002361 00000396716118 0 4 RDX: 0000000000000003 RSI: 0000000000201000 RDI: 0000000000000000
002362 00000396716282 0 4 RBP: ffffffffffffffff R08: ffffffffffffffff R09: 0000000000000000
002363 00000396716444 0 4 R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000000000
002364 00000396716608 0 4 R13: 0000000000201000 R14: 0000000000000022 R15: 0000000000000000
002365 00000396716773 0 4 Code: 
002366 00000396716821 0 4 41 
002367 00000396716864 0 4 5e 
002368 00000396716905 0 4 41 
002369 00000396716946 0 4 5f 
002370 00000396716988 0 4 5d 
002371 00000396717031 0 4 c3 
002372 00000396717073 0 4 48 
002373 00000396717115 0 4 39 
002374 00000396717157 0 4 d8 
002375 00000396717199 0 4 48 
002376 00000396717240 0 4 0f 
002377 00000396717281 0 4 47 
002378 00000396717322 0 4 c3 
002379 00000396717364 0 4 48 
002380 00000396717406 0 4 29 
002381 00000396717446 0 4 d0 
002382 00000396717488 0 4 48 
002383 00000396717531 0 4 89 
002384 00000396717572 0 4 c2 
002385 00000396717614 0 4 48 
002386 00000396717655 0 4 2b 
002387 00000396717698 0 4 57 
002388 00000396717740 0 4 28 
002389 00000396717783 0 4 48 
002390 00000396717824 0 4 21 
002391 00000396717866 0 4 d1 
002392 00000396717907 0 4 48 
002393 00000396717949 0 4 29 
002394 00000396717991 0 4 c8 
002395 00000396724995 0 4 49 
002396 00000396732015 0 4 39 
002397 00000396738940 0 4 c3 
002398 00000396745778 0 4 0f 
002399 00000396752557 0 4 87 
002400 00000396759235 0 4 b9 
002401 00000396765848 0 4 00 
002402 00000396772375 0 4 00 
002403 00000396778850 0 4 00 
002404 00000396785258 0 4 49 
002405 00000396791610 0 4 39 
002406 00000396797894 0 4 c0 
002407 00000396804063 0 4 76 
002408 00000396810171 0 4 d0 
002409 00000396816203 0 4 <0f> 
002410 00000396822145 0 4 0b 
002411 00000396827995 0 4 4c 
002412 00000396833761 0 4 8b 
002413 00000396839447 0 4 25 
002414 00000396845083 0 4 12 
002415 00000396850686 0 4 3b 
002416 00000396856194 0 4 e6 
002417 00000396861646 0 4 00 
002418 00000396867062 0 4 4e 
002419 00000396872403 0 4 8d 
002420 00000396877681 0 4 2c 
002421 00000396882901 0 4 1e 
002422 00000396888058 0 4 49 
002423 00000396893130 0 4 83 
002424 00000396898193 0 4 e9 
002425 00000396903159 0 4 20 
002426 00000396907926 0 4 45 
002427 00000396912488 0 4 31 
002428 00000396916874 0 4 f6 
002429 00000396921024 0 4 4d 
002430 00000396924964 0 1 RIP: unmapped_area_topdown+0xa5/0x170 RSP: ffffc90001de7d10



That's this...

1963:	VM_BUG_ON(gap_end < gap_start);