git: 813eb5a4975a - releng/14.5 - devstat: Fix a kernel stack disclosure

The branch releng/14.5 has been updated by cperciva:

URL: https://cgit.FreeBSD.org/src/commit/?id=813eb5a4975aafd2e5f5799ba4244649b35d4d5b

commit 813eb5a4975aafd2e5f5799ba4244649b35d4d5b
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2026-09-01 16:07:09 +0000
Commit:     Colin Percival <cperciva@FreeBSD.org>
CommitDate: 2026-09-03 22:45:57 +0000

    devstat: Fix a kernel stack disclosure
    
    The 16-byte "device_name" field was not zero-filled, so could contain
    uninitialized stack data.  Zero the whole struct, as that's the
    prevailing pattern for this kind of conversion code, and it's more
    robust in the face of future revisions to struct devstat.
    
    Approved by:    re (cperciva)
    Reviewed by:    olce, kib
    Reported by:    Reo Shiseki
    Fixes:          a11d132f6c62 ("devstat: Provide 32-bit compatibility")
    MFC after:      3 days
    Sponsored by:   The FreeBSD Foundation
    Differential Revision:  https://reviews.freebsd.org/D59309
    
    (cherry picked from commit 7cb1a76f88158fb690418336b736e66c238cd4f7)
    (cherry picked from commit 6e94e0734b9d3036df8c7d94d827f8eb1119905b)
---
 sys/kern/subr_devstat.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/kern/subr_devstat.c b/sys/kern/subr_devstat.c
index 1bc37b970cbf..a421a1de2b0f 100644
--- a/sys/kern/subr_devstat.c
+++ b/sys/kern/subr_devstat.c
@@ -431,6 +431,7 @@ sysctl_devstat(SYSCTL_HANDLER_ARGS)
 			struct devstat32 ds32;
 			unsigned int i;
 
+			memset(&ds32, 0, sizeof(ds32));
 			CP(*nds, ds32, sequence0);
 			CP(*nds, ds32, allocated);
 			CP(*nds, ds32, start_count);