| Message ID | 20240531-fix-poison-set-cacheline-v1-1-e3bc7e8f1158@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | hw/cxl: Fix read from bogus memory | expand |
On Fri, 31 May 2024 at 17:22, Ira Weiny <ira.weiny@intel.com> wrote: > > Peter and coverity report: > > We've passed '&data' to address_space_write(), which means "read > from the address on the stack where the function argument 'data' > lives", so instead of writing 64 bytes of data to the guest , > we'll write 64 bytes which start with a host pointer value and > then continue with whatever happens to be on the host stack > after that. > > Indeed the intention was to write 64 bytes of data at the address given. > > Fix the parameter to address_space_write(). > Coverity CID: 1544772 > Reported-by: Peter Maydell <peter.maydell@linaro.org> > Link: https://lore.kernel.org/all/CAFEAcA-u4sytGwTKsb__Y+_+0O2-WwARntm3x8WNhvL1WfHOBg@mail.gmail.com/ > Fixes: 6bda41a69bdc ("hw/cxl: Add clear poison mailbox command support.") > Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> > Signed-off-by: Ira Weiny <ira.weiny@intel.com> > --- > Compile tested only. Jonathan please double check me. > --- > hw/mem/cxl_type3.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c > index 3e42490b6ce8..582412d9925f 100644 > --- a/hw/mem/cxl_type3.c > +++ b/hw/mem/cxl_type3.c > @@ -1025,7 +1025,7 @@ static bool set_cacheline(CXLType3Dev *ct3d, uint64_t dpa_offset, uint8_t *data) > as = &ct3d->hostpmem_as; > } > > - address_space_write(as, dpa_offset, MEMTXATTRS_UNSPECIFIED, &data, > + address_space_write(as, dpa_offset, MEMTXATTRS_UNSPECIFIED, data, > CXL_CACHE_LINE_SIZE); > return true; > } Reviewed-by: Peter Maydell <peter.maydell@linaro.org> thanks -- PMM
On Fri, May 31, 2024 at 11:22:05AM -0500, Ira Weiny wrote: > Peter and coverity report: > > We've passed '&data' to address_space_write(), which means "read > from the address on the stack where the function argument 'data' > lives", so instead of writing 64 bytes of data to the guest , > we'll write 64 bytes which start with a host pointer value and > then continue with whatever happens to be on the host stack > after that. > > Indeed the intention was to write 64 bytes of data at the address given. > > Fix the parameter to address_space_write(). > > Reported-by: Peter Maydell <peter.maydell@linaro.org> > Link: https://lore.kernel.org/all/CAFEAcA-u4sytGwTKsb__Y+_+0O2-WwARntm3x8WNhvL1WfHOBg@mail.gmail.com/ > Fixes: 6bda41a69bdc ("hw/cxl: Add clear poison mailbox command support.") > Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> > Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> I'll queue it for the next pull which should go out soonish. > --- > Compile tested only. Jonathan please double check me. > --- > hw/mem/cxl_type3.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c > index 3e42490b6ce8..582412d9925f 100644 > --- a/hw/mem/cxl_type3.c > +++ b/hw/mem/cxl_type3.c > @@ -1025,7 +1025,7 @@ static bool set_cacheline(CXLType3Dev *ct3d, uint64_t dpa_offset, uint8_t *data) > as = &ct3d->hostpmem_as; > } > > - address_space_write(as, dpa_offset, MEMTXATTRS_UNSPECIFIED, &data, > + address_space_write(as, dpa_offset, MEMTXATTRS_UNSPECIFIED, data, > CXL_CACHE_LINE_SIZE); > return true; > } > > --- > base-commit: 3b2fe44bb7f605f179e5e7feb2c13c2eb3abbb80 > change-id: 20240531-fix-poison-set-cacheline-e32bc1e74b27 > > Best regards, > -- > Ira Weiny <ira.weiny@intel.com>
On Fri, 31 May 2024 11:22:05 -0500 Ira Weiny <ira.weiny@intel.com> wrote: > Peter and coverity report: > > We've passed '&data' to address_space_write(), which means "read > from the address on the stack where the function argument 'data' > lives", so instead of writing 64 bytes of data to the guest , > we'll write 64 bytes which start with a host pointer value and > then continue with whatever happens to be on the host stack > after that. > > Indeed the intention was to write 64 bytes of data at the address given. > > Fix the parameter to address_space_write(). > > Reported-by: Peter Maydell <peter.maydell@linaro.org> > Link: https://lore.kernel.org/all/CAFEAcA-u4sytGwTKsb__Y+_+0O2-WwARntm3x8WNhvL1WfHOBg@mail.gmail.com/ > Fixes: 6bda41a69bdc ("hw/cxl: Add clear poison mailbox command support.") > Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> > Signed-off-by: Ira Weiny <ira.weiny@intel.com> > --- > Compile tested only. Jonathan please double check me. Looks good to me. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> > --- > hw/mem/cxl_type3.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c > index 3e42490b6ce8..582412d9925f 100644 > --- a/hw/mem/cxl_type3.c > +++ b/hw/mem/cxl_type3.c > @@ -1025,7 +1025,7 @@ static bool set_cacheline(CXLType3Dev *ct3d, uint64_t dpa_offset, uint8_t *data) > as = &ct3d->hostpmem_as; > } > > - address_space_write(as, dpa_offset, MEMTXATTRS_UNSPECIFIED, &data, > + address_space_write(as, dpa_offset, MEMTXATTRS_UNSPECIFIED, data, > CXL_CACHE_LINE_SIZE); > return true; > } > > --- > base-commit: 3b2fe44bb7f605f179e5e7feb2c13c2eb3abbb80 > change-id: 20240531-fix-poison-set-cacheline-e32bc1e74b27 > > Best regards,
On 31/5/24 18:22, Ira Weiny wrote: > Peter and coverity report: > > We've passed '&data' to address_space_write(), which means "read > from the address on the stack where the function argument 'data' > lives", so instead of writing 64 bytes of data to the guest , > we'll write 64 bytes which start with a host pointer value and > then continue with whatever happens to be on the host stack > after that. > > Indeed the intention was to write 64 bytes of data at the address given. > > Fix the parameter to address_space_write(). > > Reported-by: Peter Maydell <peter.maydell@linaro.org> > Link: https://lore.kernel.org/all/CAFEAcA-u4sytGwTKsb__Y+_+0O2-WwARntm3x8WNhvL1WfHOBg@mail.gmail.com/ > Fixes: 6bda41a69bdc ("hw/cxl: Add clear poison mailbox command support.") > Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> > Signed-off-by: Ira Weiny <ira.weiny@intel.com> > --- > Compile tested only. Jonathan please double check me. > --- > hw/mem/cxl_type3.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) Thanks, patch queued.
On Mon, Jun 03, 2024 at 02:53:35PM +0200, Philippe Mathieu-Daudé wrote: > On 31/5/24 18:22, Ira Weiny wrote: > > Peter and coverity report: > > > > We've passed '&data' to address_space_write(), which means "read > > from the address on the stack where the function argument 'data' > > lives", so instead of writing 64 bytes of data to the guest , > > we'll write 64 bytes which start with a host pointer value and > > then continue with whatever happens to be on the host stack > > after that. > > > > Indeed the intention was to write 64 bytes of data at the address given. > > > > Fix the parameter to address_space_write(). > > > > Reported-by: Peter Maydell <peter.maydell@linaro.org> > > Link: https://lore.kernel.org/all/CAFEAcA-u4sytGwTKsb__Y+_+0O2-WwARntm3x8WNhvL1WfHOBg@mail.gmail.com/ > > Fixes: 6bda41a69bdc ("hw/cxl: Add clear poison mailbox command support.") > > Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> > > Signed-off-by: Ira Weiny <ira.weiny@intel.com> > > --- > > Compile tested only. Jonathan please double check me. > > --- > > hw/mem/cxl_type3.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > Thanks, patch queued. Had it queued too but sure, I can drop.
On 3/6/24 17:05, Michael S. Tsirkin wrote: > On Mon, Jun 03, 2024 at 02:53:35PM +0200, Philippe Mathieu-Daudé wrote: >> On 31/5/24 18:22, Ira Weiny wrote: >>> Peter and coverity report: >>> >>> We've passed '&data' to address_space_write(), which means "read >>> from the address on the stack where the function argument 'data' >>> lives", so instead of writing 64 bytes of data to the guest , >>> we'll write 64 bytes which start with a host pointer value and >>> then continue with whatever happens to be on the host stack >>> after that. >>> >>> Indeed the intention was to write 64 bytes of data at the address given. >>> >>> Fix the parameter to address_space_write(). >>> >>> Reported-by: Peter Maydell <peter.maydell@linaro.org> >>> Link: https://lore.kernel.org/all/CAFEAcA-u4sytGwTKsb__Y+_+0O2-WwARntm3x8WNhvL1WfHOBg@mail.gmail.com/ >>> Fixes: 6bda41a69bdc ("hw/cxl: Add clear poison mailbox command support.") >>> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> >>> Signed-off-by: Ira Weiny <ira.weiny@intel.com> >>> --- >>> Compile tested only. Jonathan please double check me. >>> --- >>> hw/mem/cxl_type3.c | 2 +- >>> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> Thanks, patch queued. > > Had it queued too but sure, I can drop. Sorry I didn't notice that along with your R-b tag, my bad. Don't modify your branch, I'm dropping it. Regards, Phil.
diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c index 3e42490b6ce8..582412d9925f 100644 --- a/hw/mem/cxl_type3.c +++ b/hw/mem/cxl_type3.c @@ -1025,7 +1025,7 @@ static bool set_cacheline(CXLType3Dev *ct3d, uint64_t dpa_offset, uint8_t *data) as = &ct3d->hostpmem_as; } - address_space_write(as, dpa_offset, MEMTXATTRS_UNSPECIFIED, &data, + address_space_write(as, dpa_offset, MEMTXATTRS_UNSPECIFIED, data, CXL_CACHE_LINE_SIZE); return true; }
Peter and coverity report: We've passed '&data' to address_space_write(), which means "read from the address on the stack where the function argument 'data' lives", so instead of writing 64 bytes of data to the guest , we'll write 64 bytes which start with a host pointer value and then continue with whatever happens to be on the host stack after that. Indeed the intention was to write 64 bytes of data at the address given. Fix the parameter to address_space_write(). Reported-by: Peter Maydell <peter.maydell@linaro.org> Link: https://lore.kernel.org/all/CAFEAcA-u4sytGwTKsb__Y+_+0O2-WwARntm3x8WNhvL1WfHOBg@mail.gmail.com/ Fixes: 6bda41a69bdc ("hw/cxl: Add clear poison mailbox command support.") Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Ira Weiny <ira.weiny@intel.com> --- Compile tested only. Jonathan please double check me. --- hw/mem/cxl_type3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- base-commit: 3b2fe44bb7f605f179e5e7feb2c13c2eb3abbb80 change-id: 20240531-fix-poison-set-cacheline-e32bc1e74b27 Best regards,