syzbot

general protection fault, probably for non-canonical address 0xfbd59c0000000040: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0xdead000000000200-0xdead000000000207]
CPU: 0 PID: 26255 Comm: syz-executor.2 Not tainted 5.15.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__block_write_begin_int+0xdf/0x1810 fs/buffer.c:1977
Code: c1 e8 03 42 80 3c 28 00 41 89 ec 0f 85 4e 16 00 00 48 8b 04 24 48 8b 58 18 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 1e 16 00 00 48 8b 03 48 89 44 24 48 48 8b 04 24
RSP: 0018:ffffc9000b07f408 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: dead000000000200 RCX: ffffc9000e399000
RDX: 1bd5a00000000040 RSI: ffffffff81daa509 RDI: ffffea00022b8058
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff819e65be R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000001000 R15: 0000000000001000
FS:  00007f8e2c71d700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fccd365f018 CR3: 0000000064587000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __block_write_begin fs/buffer.c:2060 [inline]
 block_write_begin+0x58/0x2e0 fs/buffer.c:2120
 generic_perform_write+0x202/0x510 mm/filemap.c:3770
 __generic_file_write_iter+0x24e/0x640 mm/filemap.c:3897
 blkdev_write_iter+0x29c/0x550 block/fops.c:519
 call_write_iter include/linux/fs.h:2163 [inline]
 do_iter_readv_writev+0x472/0x750 fs/read_write.c:729
 do_iter_write+0x188/0x710 fs/read_write.c:855
 vfs_iter_write+0x70/0xa0 fs/read_write.c:896
 iter_file_splice_write+0x723/0xc70 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x110/0x180 fs/splice.c:936
 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891
 do_splice_direct+0x1b3/0x280 fs/splice.c:979
 do_sendfile+0xae9/0x1240 fs/read_write.c:1249
 __do_sys_sendfile64 fs/read_write.c:1314 [inline]
 __se_sys_sendfile64 fs/read_write.c:1300 [inline]
 __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1300
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f8e2f1a7a39
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8e2c71d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f8e2f2aaf60 RCX: 00007f8e2f1a7a39
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000007
RBP: 00007f8e2f201c5f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000080006 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e2f7deb2f R14: 00007f8e2c71d300 R15: 0000000000022000
Modules linked in:
---[ end trace ec68533ab295bec1 ]---
RIP: 0010:__block_write_begin_int+0xdf/0x1810 fs/buffer.c:1977
Code: c1 e8 03 42 80 3c 28 00 41 89 ec 0f 85 4e 16 00 00 48 8b 04 24 48 8b 58 18 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 1e 16 00 00 48 8b 03 48 89 44 24 48 48 8b 04 24
RSP: 0018:ffffc9000b07f408 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: dead000000000200 RCX: ffffc9000e399000
RDX: 1bd5a00000000040 RSI: ffffffff81daa509 RDI: ffffea00022b8058
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff819e65be R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000001000 R15: 0000000000001000
FS:  00007f8e2c71d700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff5cdfcf010 CR3: 0000000064587000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c1 e8 03             	shr    $0x3,%eax
   3:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
   8:	41 89 ec             	mov    %ebp,%r12d
   b:	0f 85 4e 16 00 00    	jne    0x165f
  11:	48 8b 04 24          	mov    (%rsp),%rax
  15:	48 8b 58 18          	mov    0x18(%rax),%rbx
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 da             	mov    %rbx,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 1e 16 00 00    	jne    0x1652
  34:	48 8b 03             	mov    (%rbx),%rax
  37:	48 89 44 24 48       	mov    %rax,0x48(%rsp)
  3c:	48 8b 04 24          	mov    (%rsp),%rax