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kernel BUG at include/linux/highmem.h:202!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 19795 Comm: syz-executor.0 Not tainted 5.10.0-rc4-next-20201117-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:zero_user_segments include/linux/highmem.h:202 [inline]
RIP: 0010:zero_user include/linux/highmem.h:223 [inline]
RIP: 0010:truncate_inode_partial_page+0x5aa/0x720 mm/truncate.c:264
Code: bc 01 00 00 00 e8 e6 f8 ff ff e9 e7 fe ff ff e8 2c 12 d8 ff 48 c7 c6 00 44 54 89 48 89 ef e8 dd b5 08 00 0f 0b e8 16 12 d8 ff <0f> 0b e8 0f 12 d8 ff 48 c7 c6 80 44 54 89 48 89 ef e8 c0 b5 08 00
RSP: 0018:ffffc900017df9e8 EFLAGS: 00010216
RAX: 000000000000018f RBX: 0000000000002cbd RCX: ffffc90002269000
RDX: 0000000000040000 RSI: ffffffff819882ca RDI: 0000000000000005
RBP: ffffea0002000000 R08: 0000000000000000 R09: ffffea0002000007
R10: 0000000000001000 R11: 0000000000000000 R12: 0000000000002cbd
R13: 0000000000002cbd R14: 0000000000000000 R15: ffffea0002000008
FS:  00007f2233c48700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ff23000 CR3: 0000000025305000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 shmem_undo_range+0x6fd/0x18f0 mm/shmem.c:921
 shmem_truncate_range mm/shmem.c:999 [inline]
 shmem_fallocate+0x9f6/0xe00 mm/shmem.c:2699
 vfs_fallocate+0x48d/0xd70 fs/open.c:309
 ksys_fallocate fs/open.c:332 [inline]
 __do_sys_fallocate fs/open.c:340 [inline]
 __se_sys_fallocate fs/open.c:338 [inline]
 __x64_sys_fallocate+0xcf/0x140 fs/open.c:338
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45deb9
Code: 0d 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2233c47c78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000002f40 RCX: 000000000045deb9
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 000000000118bf68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000002cbd R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007fff5f2add9f R14: 00007f2233c489c0 R15: 000000000118bf2c
Modules linked in:
---[ end trace a09c6a107079a4ff ]---
RIP: 0010:zero_user_segments include/linux/highmem.h:202 [inline]
RIP: 0010:zero_user include/linux/highmem.h:223 [inline]
RIP: 0010:truncate_inode_partial_page+0x5aa/0x720 mm/truncate.c:264
Code: bc 01 00 00 00 e8 e6 f8 ff ff e9 e7 fe ff ff e8 2c 12 d8 ff 48 c7 c6 00 44 54 89 48 89 ef e8 dd b5 08 00 0f 0b e8 16 12 d8 ff <0f> 0b e8 0f 12 d8 ff 48 c7 c6 80 44 54 89 48 89 ef e8 c0 b5 08 00
RSP: 0018:ffffc900017df9e8 EFLAGS: 00010216
RAX: 000000000000018f RBX: 0000000000002cbd RCX: ffffc90002269000
RDX: 0000000000040000 RSI: ffffffff819882ca RDI: 0000000000000005
RBP: ffffea0002000000 R08: 0000000000000000 R09: ffffea0002000007
R10: 0000000000001000 R11: 0000000000000000 R12: 0000000000002cbd
R13: 0000000000002cbd R14: 0000000000000000 R15: ffffea0002000008
FS:  00007f2233c48700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ff23000 CR3: 0000000025305000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400