------------[ cut here ]------------
WARNING: CPU: 1 PID: 13880 at lib/iov_iter.c:1158 iov_iter_pipe+0x247/0x350 lib/iov_iter.c:1158
Modules linked in:
CPU: 1 PID: 13880 Comm: syz-executor.1 Not tainted 5.14.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:iov_iter_pipe+0x247/0x350 lib/iov_iter.c:1158
Code: 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 60 0f 85 0d 01 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 99 b8 7b fd <0f> 0b e9 c6 fe ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 54 fe ff
RSP: 0018:ffffc900049cf860 EFLAGS: 00010246
RAX: ffffffff84046c17 RBX: 0000000000000010 RCX: 0000000000040000
RDX: ffffc9001809d000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc900049cf910 R08: ffffffff84046ad6 R09: ffffed100c0d350f
R10: ffffed100c0d350f R11: 0000000000000000 R12: 0000000000000010
R13: ffffc900049cf980 R14: 1ffff11002d18826 R15: ffff8880168c413c
FS:  00007f8bce2c5700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000171c848 CR3: 0000000055ebe000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 generic_file_splice_read+0xa4/0x780 fs/splice.c:307
 do_splice_to fs/splice.c:796 [inline]
 splice_direct_to_actor+0x45f/0xd00 fs/splice.c:870
 do_splice_direct+0x282/0x3e0 fs/splice.c:979
 do_sendfile+0x885/0x1200 fs/read_write.c:1260
 __do_sys_sendfile64 fs/read_write.c:1325 [inline]
 __se_sys_sendfile64+0x145/0x1a0 fs/read_write.c:1311
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665e9
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:00007f8bce2c5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000009
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000800100020001 R11: 0000000000000246 R12: 000000000056c038
R13: 00007ffc968cb4cf R14: 00007f8bce2c5300 R15: 0000000000022000