Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 3 PID: 10255 Comm: syz-executor.3 Not tainted 6.10.0-rc5-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
RIP: 0010:iter_file_splice_write+0xa24/0x10b0 fs/splice.c:759
Code: 00 48 89 fa 48 c1 ea 03 80 3c 1a 00 0f 85 b1 04 00 00 4d 8b 65 10 49 c7 45 10 00 00 00 00 49 8d 7c 24 08 48 89 fa 48 c1 ea 03 <80> 3c 1a 00 0f 85 1a 05 00 00 49 8b 54 24 08 4c 89 ee 4c 89 ff 83
RSP: 0018:ffffc90004ad7920 EFLAGS: 00010202
RAX: 000000000001bbc6 RBX: dffffc0000000000 RCX: ffffc90002e91000
RDX: 0000000000000001 RSI: ffffffff820b049c RDI: 0000000000000008
RBP: 0000000000000010 R08: 0000000000000006 R09: 0000000000000000
R10: 7ffffffffffeffff R11: 0000000000000002 R12: 0000000000000000
R13: ffff88801d55d800 R14: 7ffffffffffeffff R15: ffff888011c2fc00
FS:  0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5e8ab40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f73d5784 CR3: 00000000555e8000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_splice_from fs/splice.c:941 [inline]
 direct_splice_actor+0x19b/0x6d0 fs/splice.c:1164
 splice_direct_to_actor+0x346/0xa40 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x17e/0x250 fs/splice.c:1233
 do_sendfile+0xb1e/0xe50 fs/read_write.c:1295
 __do_compat_sys_sendfile fs/read_write.c:1383 [inline]
 __se_compat_sys_sendfile fs/read_write.c:1366 [inline]
 __ia32_compat_sys_sendfile+0x1e7/0x230 fs/read_write.c:1366
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7298579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5e8a5ac EFLAGS: 00000292 ORIG_RAX: 00000000000000bb
RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 0000000000000008
RDX: 0000000000000000 RSI: 000000007ffff000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
RIP: 0010:iter_file_splice_write+0xa24/0x10b0 fs/splice.c:759
Code: 00 48 89 fa 48 c1 ea 03 80 3c 1a 00 0f 85 b1 04 00 00 4d 8b 65 10 49 c7 45 10 00 00 00 00 49 8d 7c 24 08 48 89 fa 48 c1 ea 03 <80> 3c 1a 00 0f 85 1a 05 00 00 49 8b 54 24 08 4c 89 ee 4c 89 ff 83
RSP: 0018:ffffc90004ad7920 EFLAGS: 00010202
RAX: 000000000001bbc6 RBX: dffffc0000000000 RCX: ffffc90002e91000
RDX: 0000000000000001 RSI: ffffffff820b049c RDI: 0000000000000008
RBP: 0000000000000010 R08: 0000000000000006 R09: 0000000000000000
R10: 7ffffffffffeffff R11: 0000000000000002 R12: 0000000000000000
R13: ffff88801d55d800 R14: 7ffffffffffeffff R15: ffff888011c2fc00
FS:  0000000000000000(0000) GS:ffff88802c000000(0063) knlGS:00000000f5e8ab40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000c000d5a000 CR3: 00000000555e8000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 48 89             	add    %cl,-0x77(%rax)
   3:	fa                   	cli
   4:	48 c1 ea 03          	shr    $0x3,%rdx
   8:	80 3c 1a 00          	cmpb   $0x0,(%rdx,%rbx,1)
   c:	0f 85 b1 04 00 00    	jne    0x4c3
  12:	4d 8b 65 10          	mov    0x10(%r13),%r12
  16:	49 c7 45 10 00 00 00 	movq   $0x0,0x10(%r13)
  1d:	00
  1e:	49 8d 7c 24 08       	lea    0x8(%r12),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 1a 00          	cmpb   $0x0,(%rdx,%rbx,1) <-- trapping instruction
  2e:	0f 85 1a 05 00 00    	jne    0x54e
  34:	49 8b 54 24 08       	mov    0x8(%r12),%rdx
  39:	4c 89 ee             	mov    %r13,%rsi
  3c:	4c 89 ff             	mov    %r15,%rdi
  3f:	83                   	.byte 0x83