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BUG: KASAN: wild-memory-access in instrument_copy_to_user include/linux/instrumented.h:118 [inline]
BUG: KASAN: wild-memory-access in copyout.part.0+0xd7/0x110 lib/iov_iter.c:189
Read of size 1824 at addr 108548c02e5a07f0 by task syz-fuzzer/8398

CPU: 1 PID: 8398 Comm: syz-fuzzer Not tainted 5.12.0-rc8-next-20210423-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 __kasan_report mm/kasan/report.c:423 [inline]
 kasan_report.cold+0x5f/0xd8 mm/kasan/report.c:436
 check_region_inline mm/kasan/generic.c:180 [inline]
 kasan_check_range+0x13d/0x180 mm/kasan/generic.c:186
 instrument_copy_to_user include/linux/instrumented.h:118 [inline]
 copyout.part.0+0xd7/0x110 lib/iov_iter.c:189
 copyout lib/iov_iter.c:658 [inline]
 _copy_to_iter+0x2b4/0x1850 lib/iov_iter.c:658
 copy_to_iter include/linux/uio.h:146 [inline]
 simple_copy_to_iter+0x4c/0x70 net/core/datagram.c:519
 __skb_datagram_iter+0x4a7/0x770 net/core/datagram.c:448
 skb_copy_datagram_iter+0x40/0x50 net/core/datagram.c:533
 skb_copy_datagram_msg include/linux/skbuff.h:3602 [inline]
 tcp_recvmsg_locked+0x1048/0x22f0 net/ipv4/tcp.c:2472
 tcp_recvmsg+0x134/0x550 net/ipv4/tcp.c:2550
 inet_recvmsg+0x11b/0x5e0 net/ipv4/af_inet.c:852
 sock_recvmsg_nosec net/socket.c:888 [inline]
 sock_recvmsg net/socket.c:906 [inline]
 sock_recvmsg net/socket.c:902 [inline]
 sock_read_iter+0x33c/0x470 net/socket.c:979
 call_read_iter include/linux/fs.h:2108 [inline]
 new_sync_read+0x5b7/0x6e0 fs/read_write.c:415
 vfs_read+0x35c/0x570 fs/read_write.c:496
 ksys_read+0x1ee/0x250 fs/read_write.c:634
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4af19b
Code: fb ff eb bd e8 a6 b6 fb ff e9 61 ff ff ff cc e8 9b 82 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
RSP: 002b:000000c0004b9828 EFLAGS: 00000212 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000000c00001e800 RCX: 00000000004af19b
RDX: 0000000000001000 RSI: 000000c0001ec000 RDI: 0000000000000006
RBP: 000000c0004b9878 R08: 0000000000000001 R09: 0000000000000002
R10: 0000000000001b62 R11: 0000000000000212 R12: 0000000000001b5e
R13: 0000000000000100 R14: 0000000000000002 R15: 0000000000000002
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