=====================================================
BUG: KMSAN: uninit-value in string_nocheck lib/vsprintf.c:611 [inline]
BUG: KMSAN: uninit-value in string+0x4fd/0x700 lib/vsprintf.c:693
 string_nocheck lib/vsprintf.c:611 [inline]
 string+0x4fd/0x700 lib/vsprintf.c:693
 vsnprintf+0x224f/0x36a0 lib/vsprintf.c:2752
 seq_vprintf fs/seq_file.c:395 [inline]
 seq_printf+0x301/0x500 fs/seq_file.c:410
 proc_keys_show+0x12d7/0x14d0 security/keys/proc.c:226
 seq_read_iter+0xc76/0x20c0 fs/seq_file.c:227
 proc_reg_read_iter+0x256/0x480 fs/proc/inode.c:300
 call_read_iter include/linux/fs.h:2108 [inline]
 generic_file_splice_read+0x78a/0xbc0 fs/splice.c:311
 do_splice_to fs/splice.c:796 [inline]
 splice_direct_to_actor+0x757/0x1440 fs/splice.c:870
 do_splice_direct+0x3b2/0x600 fs/splice.c:979
 do_sendfile+0xfe6/0x2040 fs/read_write.c:1260
 __do_sys_sendfile64 fs/read_write.c:1325 [inline]
 __se_sys_sendfile64 fs/read_write.c:1311 [inline]
 __x64_sys_sendfile64+0x367/0x400 fs/read_write.c:1311
 do_syscall_64+0x55/0xc0 arch/x86/entry/common.c:49
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Local variable ----bookmark.i@__wake_up created at:
 __wake_up_common_lock kernel/sched/wait.c:129 [inline]
 __wake_up+0x9a/0x250 kernel/sched/wait.c:157
 __d_lookup_done+0x3bf/0x5e0 fs/dcache.c:2685
=====================================================
Kernel panic - not syncing: panic_on_kmsan set ...
CPU: 0 PID: 3524 Comm: syz-executor.0 Tainted: G    B   W         5.13.0-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+0x25a/0x2f6 lib/dump_stack.c:120
 panic+0x4c7/0xe98 kernel/panic.c:231
 kmsan_report+0x2ee/0x300 mm/kmsan/report.c:179
 __msan_warning+0xd7/0x150 mm/kmsan/instrumentation.c:208
 string_nocheck lib/vsprintf.c:611 [inline]
 string+0x4fd/0x700 lib/vsprintf.c:693
 vsnprintf+0x224f/0x36a0 lib/vsprintf.c:2752
 seq_vprintf fs/seq_file.c:395 [inline]
 seq_printf+0x301/0x500 fs/seq_file.c:410
 proc_keys_show+0x12d7/0x14d0 security/keys/proc.c:226
 seq_read_iter+0xc76/0x20c0 fs/seq_file.c:227
 proc_reg_read_iter+0x256/0x480 fs/proc/inode.c:300
 call_read_iter include/linux/fs.h:2108 [inline]
 generic_file_splice_read+0x78a/0xbc0 fs/splice.c:311
 do_splice_to fs/splice.c:796 [inline]
 splice_direct_to_actor+0x757/0x1440 fs/splice.c:870
 do_splice_direct+0x3b2/0x600 fs/splice.c:979
 do_sendfile+0xfe6/0x2040 fs/read_write.c:1260
 __do_sys_sendfile64 fs/read_write.c:1325 [inline]
 __se_sys_sendfile64 fs/read_write.c:1311 [inline]
 __x64_sys_sendfile64+0x367/0x400 fs/read_write.c:1311
 do_syscall_64+0x55/0xc0 arch/x86/entry/common.c:49
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f65b12fc739
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:00007f65ae852188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f65b1401038 RCX: 00007f65b12fc739
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006
RBP: 00007f65b1356cc4 R08: 0000000000000000 R09: 0000000000000000
R10: 00000003effffffc R11: 0000000000000246 R12: 00007f65b1401038
R13: 00007f65b1934b1f R14: 00007f65ae852300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..