Date: Tue, 2 Jan 2024 01:12:59 GMT From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 6b067be54eda - stable/13 - compat_freebsd4: Check for errors from subyte() in freebsd4_uname() Message-ID: <202401020112.4021Cx1T054784@gitrepo.freebsd.org>
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The branch stable/13 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=6b067be54eda23929e4ffaf8402471151b101856 commit 6b067be54eda23929e4ffaf8402471151b101856 Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2023-12-26 01:39:21 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2024-01-02 01:12:44 +0000 compat_freebsd4: Check for errors from subyte() in freebsd4_uname() This is in preparation for adding a __result_use_check annotation to copyin() and related functions. Reviewed by: imp, kib, jhb MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D43099 (cherry picked from commit 4f35450ce52a7b141e7ae8d37fa257b5f8971dda) --- sys/kern/kern_xxx.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/sys/kern/kern_xxx.c b/sys/kern/kern_xxx.c index 99fe9e6e71c9..8674dbf61361 100644 --- a/sys/kern/kern_xxx.c +++ b/sys/kern/kern_xxx.c @@ -334,7 +334,9 @@ freebsd4_uname(struct thread *td, struct freebsd4_uname_args *uap) 1, 0, 0, 0, 0); if (error) return (error); - subyte( uap->name->sysname + sizeof(uap->name->sysname) - 1, 0); + error = subyte(uap->name->sysname + sizeof(uap->name->sysname) - 1, 0); + if (error) + return (EFAULT); name[1] = KERN_HOSTNAME; len = sizeof uap->name->nodename; @@ -342,7 +344,9 @@ freebsd4_uname(struct thread *td, struct freebsd4_uname_args *uap) 1, 0, 0, 0, 0); if (error) return (error); - subyte( uap->name->nodename + sizeof(uap->name->nodename) - 1, 0); + error = subyte(uap->name->nodename + sizeof(uap->name->nodename) - 1, 0); + if (error) + return (EFAULT); name[1] = KERN_OSRELEASE; len = sizeof uap->name->release; @@ -350,7 +354,9 @@ freebsd4_uname(struct thread *td, struct freebsd4_uname_args *uap) 1, 0, 0, 0, 0); if (error) return (error); - subyte( uap->name->release + sizeof(uap->name->release) - 1, 0); + error = subyte(uap->name->release + sizeof(uap->name->release) - 1, 0); + if (error) + return (EFAULT); /* name = KERN_VERSION; @@ -383,7 +389,9 @@ freebsd4_uname(struct thread *td, struct freebsd4_uname_args *uap) 1, 0, 0, 0, 0); if (error) return (error); - subyte( uap->name->machine + sizeof(uap->name->machine) - 1, 0); + error = subyte(uap->name->machine + sizeof(uap->name->machine) - 1, 0); + if (error) + return (EFAULT); return (0); }
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