git: c07ebf5becae - stable/14 - kmsan: Add kmsan_check_uio()
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Date: Thu, 14 Dec 2023 14:44:46 UTC
The branch stable/14 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=c07ebf5becae76dd9843b8a835df9f7ccd65e897 commit c07ebf5becae76dd9843b8a835df9f7ccd65e897 Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2023-12-06 16:31:15 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2023-12-14 14:44:38 +0000 kmsan: Add kmsan_check_uio() This was handy for some ad-hoc debugging and fits in with other kmsan_check_*() routines which operate on some kind of data container. MFC after: 1 week Sponsored by: The FreeBSD Foundation (cherry picked from commit be5464ae233ada46a778cc82f7107a10a7d5343b) --- share/man/man9/Makefile | 1 + share/man/man9/kmsan.9 | 5 ++++- sys/kern/subr_msan.c | 9 +++++++++ sys/sys/msan.h | 3 +++ 4 files changed, 17 insertions(+), 1 deletion(-) diff --git a/share/man/man9/Makefile b/share/man/man9/Makefile index c82ce254f681..99ec5219d8e0 100644 --- a/share/man/man9/Makefile +++ b/share/man/man9/Makefile @@ -1369,6 +1369,7 @@ MLINKS+=kmsan.9 KMSAN.9 \ kmsan.9 kmsan_check_bio.9 \ kmsan.9 kmsan_check_ccb.9 \ kmsan.9 kmsan_check_mbuf.9 \ + kmsan.9 kmsan_check_uio.9 \ kmsan.9 kmsan_mark.9 \ kmsan.9 kmsan_oirg.9 MLINKS+=kobj.9 DEFINE_CLASS.9 \ diff --git a/share/man/man9/kmsan.9 b/share/man/man9/kmsan.9 index 714442e4d9fe..90faf8f82e5e 100644 --- a/share/man/man9/kmsan.9 +++ b/share/man/man9/kmsan.9 @@ -25,7 +25,7 @@ .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.Dd October 13, 2023 +.Dd December 6, 2023 .Dt KMSAN 9 .Os .Sh NAME @@ -56,6 +56,8 @@ kernel configuration file: .Fn kmsan_check_ccb "const union ccb *" "const char *descr" .Ft void .Fn kmsan_check_mbuf "const struct mbuf *" "const char *descr" +.Ft void +.Fn kmsan_check_uio "const struct uio *" "const char *descr" .Sh DESCRIPTION .Nm is a subsystem which leverages compiler instrumentation to detect uses of @@ -306,6 +308,7 @@ f(size_t osz) .Xr busdma 9 , .Xr copyout 9 , .Xr KASAN 9 , +.Xr uio 9 , .Xr uma 9 .Rs .%A Evgeniy Stepanov diff --git a/sys/kern/subr_msan.c b/sys/kern/subr_msan.c index abac71da6d64..ef3c6c10b0ba 100644 --- a/sys/kern/subr_msan.c +++ b/sys/kern/subr_msan.c @@ -587,6 +587,15 @@ kmsan_check_mbuf(const struct mbuf *m, const char *descr) } while ((m = m->m_next) != NULL); } +void +kmsan_check_uio(const struct uio *uio, const char *descr) +{ + for (int i = 0; i < uio->uio_iovcnt; i++) { + kmsan_check(uio->uio_iov[i].iov_base, uio->uio_iov[i].iov_len, + descr); + } +} + void kmsan_init(void) { diff --git a/sys/sys/msan.h b/sys/sys/msan.h index 4baa71ec8113..58110d7306e6 100644 --- a/sys/sys/msan.h +++ b/sys/sys/msan.h @@ -50,6 +50,7 @@ union ccb; struct bio; struct mbuf; struct memdesc; +struct uio; void kmsan_init(void); @@ -69,6 +70,7 @@ void kmsan_check(const void *, size_t, const char *); void kmsan_check_bio(const struct bio *, const char *); void kmsan_check_ccb(const union ccb *, const char *); void kmsan_check_mbuf(const struct mbuf *, const char *); +void kmsan_check_uio(const struct uio *, const char *); #else #define kmsan_init(u) @@ -85,6 +87,7 @@ void kmsan_check_mbuf(const struct mbuf *, const char *); #define kmsan_check_bio(b, d) #define kmsan_check_ccb(c, d) #define kmsan_check_mbuf(m, d) +#define kmsan_check_uio(u, d) #define kmsan_bus_dmamap_sync(d, op) #endif