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BUG: KMSAN: kernel-infoleak in kmsan_copy_to_user+0x81/0x90 mm/kmsan/kmsan_hooks.c:253
CPU: 1 PID: 15134 Comm: syz-executor.1 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
 kmsan_internal_check_memory+0x238/0x3d0 mm/kmsan/kmsan.c:423
 kmsan_copy_to_user+0x81/0x90 mm/kmsan/kmsan_hooks.c:253
 instrument_copy_to_user include/linux/instrumented.h:91 [inline]
 _copy_to_user+0x18e/0x260 lib/usercopy.c:33
 copy_to_user include/linux/uaccess.h:170 [inline]
 move_addr_to_user+0x3de/0x670 net/socket.c:237
 __sys_getpeername+0x499/0x690 net/socket.c:1946
 __do_sys_getpeername net/socket.c:1956 [inline]
 __se_sys_getpeername+0x91/0xb0 net/socket.c:1953
 __x64_sys_getpeername+0x4a/0x70 net/socket.c:1953
 do_syscall_64+0xad/0x160 arch/x86/entry/common.c:386
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: Bad RIP value.
RSP: 002b:00007f705c043c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000034
RAX: ffffffffffffffda RBX: 0000000000004340 RCX: 000000000045d5b9
RDX: 00000000200004c0 RSI: 0000000020000480 RDI: 0000000000000005
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 000000000169fb6f R14: 00007f705c0449c0 R15: 000000000118cf4c

Local variable ----address@__sys_getpeername created at:
 __sys_getpeername+0x91/0x690 net/socket.c:1932
 __sys_getpeername+0x91/0x690 net/socket.c:1932

Bytes 2-3 of 20 are uninitialized
Memory access of size 20 starts at ffff888114fa3de8
Data copied to user address 0000000020000480
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