general protection fault in anon_vma_interval_tree

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	general protection fault in anon_vma_interval_tree_verify mm				1	1843d	1841d	0/28	auto-closed as invalid on 2020/04/11 05:34
general protection fault, probably for non-canonical address 0xe0edfcee00e0ee21: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0x0770077007077108-0x077007700707710f]
CPU: 1 PID: 21020 Comm: syz-executor.0 Not tainted 5.9.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vma_start_pgoff mm/interval_tree.c:15 [inline]
RIP: 0010:avc_start_pgoff mm/interval_tree.c:63 [inline]
RIP: 0010:anon_vma_interval_tree_verify+0x67/0x170 mm/interval_tree.c:108
Code: df 48 c1 ea 03 80 3c 02 00 0f 85 ff 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 2b 48 8d bd 98 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d0 00 00 00 4c 8b a5 98 00 00 00 4c 89 ef 4c 89
RSP: 0018:ffffc90015ce7a50 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888000107d20 RCX: ffffc90007849000
RDX: 00ee00ee00e0ee21 RSI: ffffffff81a4befe RDI: 0770077007077108
RBP: 0770077007077070 R08: 0000000000000001 R09: ffff888099669017
R10: 000000000000014b R11: 0000000000000000 R12: ffff8880942744d8
R13: 0000000000700700 R14: ffff888014ff0c00 R15: ffff888000107d20
FS:  00007f0e333ce700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30930000 CR3: 00000002106c4000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 validate_mm+0xfe/0x800 mm/mmap.c:404
 __vma_adjust+0xc67/0x23e0 mm/mmap.c:979
 vma_adjust include/linux/mm.h:2489 [inline]
 __split_vma+0x471/0x560 mm/mmap.c:2724
 __do_munmap+0xe9b/0x1170 mm/mmap.c:2823
 do_munmap mm/mmap.c:2877 [inline]
 mmap_region+0x257/0x1780 mm/mmap.c:1716
 do_mmap+0xcf9/0x11d0 mm/mmap.c:1545
 vm_mmap_pgoff+0x195/0x200 mm/util.c:506
 ksys_mmap_pgoff+0x444/0x580 mm/mmap.c:1596
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5f9
Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0e333cdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000020d80 RCX: 000000000045d5f9
RDX: 00000000007ffffe RSI: 0000000000600000 RDI: 0000000020000000
RBP: 000000000118cf98 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 000000000118cf4c
R13: 000000000169fb6f R14: 00007f0e333ce9c0 R15: 000000000118cf4c
Modules linked in:
---[ end trace e7cadfbcfd00b4a1 ]---
RIP: 0010:vma_start_pgoff mm/interval_tree.c:15 [inline]
RIP: 0010:avc_start_pgoff mm/interval_tree.c:63 [inline]
RIP: 0010:anon_vma_interval_tree_verify+0x67/0x170 mm/interval_tree.c:108
Code: df 48 c1 ea 03 80 3c 02 00 0f 85 ff 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 2b 48 8d bd 98 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d0 00 00 00 4c 8b a5 98 00 00 00 4c 89 ef 4c 89
RSP: 0018:ffffc90015ce7a50 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888000107d20 RCX: ffffc90007849000
RDX: 00ee00ee00e0ee21 RSI: ffffffff81a4befe RDI: 0770077007077108
RBP: 0770077007077070 R08: 0000000000000001 R09: ffff888099669017
R10: 000000000000014b R11: 0000000000000000 R12: ffff8880942744d8
R13: 0000000000700700 R14: ffff888014ff0c00 R15: ffff888000107d20
FS:  00007f0e333ce700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30930000 CR3: 00000002106c4000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400