===================================================== BUG: KMSAN: uninit-value in ptr_to_id+0x3bc/0x1170 lib/vsprintf.c:832 ptr_to_id+0x3bc/0x1170 lib/vsprintf.c:832 restricted_pointer+0x653/0xca0 lib/vsprintf.c:860 pointer+0x99d/0x2060 lib/vsprintf.c:2437 vsnprintf+0x1a9b/0x3650 lib/vsprintf.c:2809 seq_vprintf fs/seq_file.c:391 [inline] seq_printf+0x314/0x4f0 fs/seq_file.c:406 udp4_format_sock net/ipv4/udp.c:3062 [inline] udp4_seq_show+0x78b/0x910 net/ipv4/udp.c:3084 seq_read_iter+0xaac/0x2150 fs/seq_file.c:230 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+0xeb9/0x14c0 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 sample.i created at: perf_log_itrace_start kernel/events/core.c:9069 [inline] event_sched_in+0x132b/0x35c0 kernel/events/core.c:2557 group_sched_in kernel/events/core.c:2595 [inline] merge_sched_in kernel/events/core.c:3746 [inline] visit_groups_merge+0x2919/0x7460 kernel/events/core.c:3696 CPU: 0 PID: 8088 Comm: syz-executor.2 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================