=====================================================
BUG: KMSAN: uninit-value in check_pointer lib/vsprintf.c:705 [inline]
BUG: KMSAN: uninit-value in string+0x3cf/0x6f0 lib/vsprintf.c:717
 check_pointer lib/vsprintf.c:705 [inline]
 string+0x3cf/0x6f0 lib/vsprintf.c:717
 vsnprintf+0x2222/0x3650 lib/vsprintf.c:2805
 seq_vprintf fs/seq_file.c:391 [inline]
 seq_printf+0x314/0x4f0 fs/seq_file.c:406
 proto_seq_show+0x583/0x1770 net/core/sock.c:3878
 traverse+0x345/0xd70 fs/seq_file.c:111
 seq_read_iter+0x1d47/0x2150 fs/seq_file.c:195
 seq_read+0x7a6/0x990 fs/seq_file.c:162
 pde_read fs/proc/inode.c:311 [inline]
 proc_reg_read+0x39d/0x560 fs/proc/inode.c:323
 do_iter_read+0xb28/0x14c0 fs/read_write.c:788
 vfs_readv fs/read_write.c:906 [inline]
 do_preadv+0x45e/0x6c0 fs/read_write.c:998
 __do_sys_preadv fs/read_write.c:1048 [inline]
 __se_sys_preadv fs/read_write.c:1043 [inline]
 __x64_sys_preadv+0x120/0x170 fs/read_write.c:1043
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Local variable rf created at:
 __schedule+0x53/0x20a0 kernel/sched/core.c:6136
 schedule+0x269/0x350 kernel/sched/core.c:6326

CPU: 0 PID: 12351 Comm: syz-executor.1 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================