git: c18a16ebcf5b - main - kern_proc_kqueues_out(): maxlen == -1 means there is no maxlen

[Konstantin Belousov]

The branch main has been updated by kib:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=c18a16ebcf5bf0bad19be10f58d9f42cbc079057

commit c18a16ebcf5bf0bad19be10f58d9f42cbc079057
Author:     Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2025-03-24 04:29:15 +0000
Commit:     Konstantin Belousov <k...@freebsd.org>
CommitDate: 2025-03-24 04:48:08 +0000

    kern_proc_kqueues_out(): maxlen == -1 means there is no maxlen
    
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
---
 sys/kern/kern_event.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/sys/kern/kern_event.c b/sys/kern/kern_event.c
index e891cb7c094a..eb77a5064113 100644
--- a/sys/kern/kern_event.c
+++ b/sys/kern/kern_event.c
@@ -2974,13 +2974,21 @@ kern_proc_kqueues_out(struct proc *p, struct sbuf *sb, 
size_t maxlen,
     bool compat32)
 {
        struct sbuf *s, sm;
+       size_t sb_len;
        int error;
 
-       s = sbuf_new(&sm, NULL, maxlen, SBUF_FIXEDLEN);
+       if (maxlen == -1 || maxlen == 0)
+               sb_len = 128;
+       else
+               sb_len = maxlen;
+       s = sbuf_new(&sm, NULL, sb_len, maxlen == -1 ? SBUF_AUTOEXTEND :
+           SBUF_FIXEDLEN);
        error = kern_proc_kqueues_out1(curthread, p, s, compat32);
        sbuf_finish(s);
-       if (error == 0)
-               sbuf_bcat(sb, sbuf_data(s), MIN(sbuf_len(s), maxlen));
+       if (error == 0) {
+               sbuf_bcat(sb, sbuf_data(s), MIN(sbuf_len(s), maxlen == -1 ?
+                   SIZE_T_MAX : maxlen));
+       }
        sbuf_delete(s);
        return (error);
 }