Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 UID: 0 PID: 502 Comm: syz.2.26 Not tainted 6.16.0-syzkaller-09928-gcbbf0a759ff9 #0 PREEMPT  b493ee12b7606d6b7e40f76a9fccfd4e0abdd857
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:pipe_buf_release include/linux/pipe_fs_i.h:282 [inline]
RIP: 0010:iter_file_splice_write+0xabc/0x1180 fs/splice.c:754
Code: 00 74 08 4c 89 f7 e8 e3 0c e7 ff 49 8b 1e 49 c7 06 00 00 00 00 48 83 c3 08 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df <42> 80 3c 30 00 4c 8b 64 24 38 74 08 48 89 df e8 b0 0c e7 ff 4c 8b
RSP: 0018:ffffc90000e1f820 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88811e021140
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 7ffffffffffffffa
RBP: ffffc90000e1fa40 R08: ffff88812d71b81f R09: 1ffff11025ae3703
R10: 0000000000000000 R11: ffffffff81e6b900 R12: dffffc0000000000
R13: 7ffffffffffffffa R14: dffffc0000000000 R15: ffff88811c8c8828
FS:  00007fec10de26c0(0000) GS:ffff88826e7a9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001900 CR3: 000000011db12000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 do_splice_from fs/splice.c:935 [inline]
 direct_splice_actor+0x23c/0x480 fs/splice.c:1158
 splice_direct_to_actor+0x4fa/0xbc0 fs/splice.c:1102
 do_splice_direct_actor fs/splice.c:1201 [inline]
 do_splice_direct+0x181/0x270 fs/splice.c:1227
 do_sendfile+0x4f6/0x940 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64 fs/read_write.c:1417 [inline]
 __x64_sys_sendfile64+0x192/0x1f0 fs/read_write.c:1417
 x64_sys_call+0x2b51/0x2fd0 arch/x86/include/generated/asm/syscalls_64.h:41
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x62/0x160 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fec0ff8e9a9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fec10de2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fec101b5fa0 RCX: 00007fec0ff8e9a9
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000007
RBP: 00007fec10010d69 R08: 0000000000000000 R09: 0000000000000000
R10: 000000007ffff000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fec101b5fa0 R15: 00007ffd9eaf9658
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pipe_buf_release include/linux/pipe_fs_i.h:282 [inline]
RIP: 0010:iter_file_splice_write+0xabc/0x1180 fs/splice.c:754
Code: 00 74 08 4c 89 f7 e8 e3 0c e7 ff 49 8b 1e 49 c7 06 00 00 00 00 48 83 c3 08 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df <42> 80 3c 30 00 4c 8b 64 24 38 74 08 48 89 df e8 b0 0c e7 ff 4c 8b
RSP: 0018:ffffc90000e1f820 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88811e021140
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 7ffffffffffffffa
RBP: ffffc90000e1fa40 R08: ffff88812d71b81f R09: 1ffff11025ae3703
R10: 0000000000000000 R11: ffffffff81e6b900 R12: dffffc0000000000
R13: 7ffffffffffffffa R14: dffffc0000000000 R15: ffff88811c8c8828
FS:  00007fec10de26c0(0000) GS:ffff88826e8a9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0072f2000 CR3: 000000011db12000 CR4: 00000000003526b0
----------------
Code disassembly (best guess):
   0:	00 74 08 4c          	add    %dh,0x4c(%rax,%rcx,1)
   4:	89 f7                	mov    %esi,%edi
   6:	e8 e3 0c e7 ff       	call   0xffe70cee
   b:	49 8b 1e             	mov    (%r14),%rbx
   e:	49 c7 06 00 00 00 00 	movq   $0x0,(%r14)
  15:	48 83 c3 08          	add    $0x8,%rbx
  19:	48 89 d8             	mov    %rbx,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	49 be 00 00 00 00 00 	movabs $0xdffffc0000000000,%r14
  27:	fc ff df
* 2a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1) <-- trapping instruction
  2f:	4c 8b 64 24 38       	mov    0x38(%rsp),%r12
  34:	74 08                	je     0x3e
  36:	48 89 df             	mov    %rbx,%rdi
  39:	e8 b0 0c e7 ff       	call   0xffe70cee
  3e:	4c                   	rex.WR
  3f:	8b                   	.byte 0x8b