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Mar 6th, 2018
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  1. root@syzkaller:~# uname -a
  2. Linux nic 4.16.0-rc3 #1 SMP Sun Feb 25 23:14:06 CST 2018 x86_64 GNU/Linux
  3. root@syzkaller:~# ./crash
  4. [ 103.989170] ------------[ cut here ]------------
  5. [ 103.990229] kernel BUG at mm/hugetlb.c:741!
  6. [ 103.991243] invalid opcode: 0000 [#2] SMP KASAN PTI
  7. [ 103.992362] Modules linked in:
  8. [ 103.992965] CPU: 0 PID: 2757 Comm: crash Tainted: G D 4.16.0-rc3 #1
  9. [ 103.994473] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-20171110_100015-anatol 04/01/2014
  10. [ 103.996603] RIP: 0010:resv_map_release+0x17c/0x1f0
  11. [ 103.997672] RSP: 0018:ffff880069e27c70 EFLAGS: 00010293
  12. [ 103.998734] RAX: ffff880069294600 RBX: ffff88006ba6e238 RCX: ffffffff9173970c
  13. [ 104.000109] RDX: 0000000000000000 RSI: ffff88006cc0c5c0 RDI: ffff88006ba6e230
  14. [ 104.001642] RBP: ffff88006ba6e238 R08: ffff880069e27a08 R09: ffff8800675f9278
  15. [ 104.003190] R10: 000000007c76f3b9 R11: 0000000000000000 R12: ffff88006ba6e238
  16. [ 104.004776] R13: dffffc0000000000 R14: ffff88006ba6e238 R15: dead000000000100
  17. [ 104.006407] FS: 00007f30f272a700(0000) GS:ffff88006d000000(0000) knlGS:0000000000000000
  18. [ 104.008241] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  19. [ 104.009512] CR2: 00007f30f250e2e0 CR3: 000000006ce14000 CR4: 00000000000006f0
  20. [ 104.011065] Call Trace:
  21. [ 104.011630] hugetlbfs_evict_inode+0x74/0xa0
  22. [ 104.012573] ? hugetlbfs_setattr+0x490/0x490
  23. [ 104.013412] evict+0x28f/0x580
  24. [ 104.014085] iput+0x5ba/0x870
  25. [ 104.014776] dentry_unlink_inode+0x45d/0x560
  26. [ 104.015706] __dentry_kill+0x308/0x580
  27. [ 104.016525] ? dput.part.20+0x27/0x730
  28. [ 104.017343] dput.part.20+0x61d/0x730
  29. [ 104.018144] dput+0x1b/0x30
  30. [ 104.018774] __fput+0x46d/0x6e0
  31. [ 104.019477] task_work_run+0x121/0x1a0
  32. [ 104.020271] exit_to_usermode_loop+0x120/0x140
  33. [ 104.021219] do_syscall_64+0x4ce/0x640
  34. [ 104.021997] entry_SYSCALL_64_after_hwframe+0x42/0xb7
  35. [ 104.023053] RIP: 0033:0x7f30f2260b79
  36. [ 104.023597] RSP: 002b:00007ffd1747df28 EFLAGS: 00000217 ORIG_RAX: 00000000000000d8
  37. [ 104.025122] RAX: fffffffffffffff4 RBX: 0000000000000000 RCX: 00007f30f2260b79
  38. [ 104.026575] RDX: 0000000000000000 RSI: 0000000000600000 RDI: 0000000020a00000
  39. [ 104.028050] RBP: 00007ffd1747df40 R08: 0000000000000000 R09: 0000000000000000
  40. [ 104.029503] R10: 0020000000000000 R11: 0000000000000217 R12: 0000000000400400
  41. [ 104.030953] R13: 00007ffd1747e040 R14: 0000000000000000 R15: 0000000000000000
  42. [ 104.032461] Code: 8b 04 24 48 83 78 50 00 75 1c e8 30 92 e1 ff 48 8b 3c 24 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 09 da 01 00 e8 14 92 e1 ff <0f> 0b 4c 89 e7 e8 9a 22 02 00 e9 c2 fe ff ff e8 90 22 02 00 eb
  43. [ 104.036395] RIP: resv_map_release+0x17c/0x1f0 RSP: ffff880069e27c70
  44. [ 104.037764] ---[ end trace 33134e9aa744faba ]---
  45. Segmentation fault
  46. root@syzkaller:~#
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