On Sat, Jun 20, 2020 at 5:30 AM Kees Cook <keescook@xxxxxxxxxxxx> wrote: > > v2: > - more special-cased fixes > - add reviews > v1: https://lore.kernel.org/lkml/20200603233203.1695403-1-keescook@xxxxxxxxxxxx > > Using uninitialized_var() is dangerous as it papers over real bugs[1] > (or can in the future), and suppresses unrelated compiler warnings > (e.g. "unused variable"). If the compiler thinks it is uninitialized, > either simply initialize the variable or make compiler changes. > > As recommended[2] by[3] Linus[4], remove the macro. > > Most of the 300 uses don't cause any warnings on gcc 9.3.0, so they're in > a single treewide commit in this series. A few others needed to actually > get cleaned up, and I broke those out into individual patches. > > The tree is: > https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/log/?h=kspp/uninit/macro > > -Kees > Hi Kees, thanks for doing a v2 of your patchset. As I saw Jason Yan providing some "uninitialized_var() macro" patches to the MLs I pointen him to your tree "v1". BTW, I have tested your "v1" against Linux v5.7 (see [1]) - just yesterday with Linux v5.7.5-rc1. Is it possible to have a v2 of this patchset on top od Linux v5.7 - if you do not mind. Thanks. Best regards, - Sedat - [1] https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/log/?h=kspp/uninit/v5.7/macro > [1] https://lore.kernel.org/lkml/20200603174714.192027-1-glider@xxxxxxxxxx/ > [2] https://lore.kernel.org/lkml/CA+55aFw+Vbj0i=1TGqCR5vQkCzWJ0QxK6CernOU6eedsudAixw@xxxxxxxxxxxxxx/ > [3] https://lore.kernel.org/lkml/CA+55aFwgbgqhbp1fkxvRKEpzyR5J8n1vKT1VZdz9knmPuXhOeg@xxxxxxxxxxxxxx/ > [4] https://lore.kernel.org/lkml/CA+55aFz2500WfbKXAx8s67wrm9=yVJu65TpLgN_ybYNv0VEOKA@xxxxxxxxxxxxxx/ > > Jason Yan (1): > f2fs: Eliminate usage of uninitialized_var() macro > > Kees Cook (15): > docs: deprecated.rst: Add uninitialized_var() > x86/mm/numa: Remove uninitialized_var() usage > drbd: Remove uninitialized_var() usage > b43: Remove uninitialized_var() usage > rtlwifi: rtl8192cu: Remove uninitialized_var() usage > ide: Remove uninitialized_var() usage > clk: st: Remove uninitialized_var() usage > spi: davinci: Remove uninitialized_var() usage > clk: spear: Remove uninitialized_var() usage > KVM: PPC: Book3S PR: Remove uninitialized_var() usage > media: sur40: Remove uninitialized_var() usage > checkpatch: Remove awareness of uninitialized_var() macro > treewide: Remove uninitialized_var() usage > compiler: Remove uninitialized_var() macro > mm/debug_vm_pgtable: Remove uninitialized_var() usage > > Documentation/process/deprecated.rst | 18 ++++++++++++++++++ > arch/arm/mach-sa1100/assabet.c | 2 +- > arch/arm/mm/alignment.c | 2 +- > arch/ia64/kernel/process.c | 2 +- > arch/ia64/mm/discontig.c | 2 +- > arch/ia64/mm/tlb.c | 2 +- > arch/mips/lib/dump_tlb.c | 2 +- > arch/mips/mm/init.c | 2 +- > arch/mips/mm/tlb-r4k.c | 6 +++--- > arch/powerpc/kvm/book3s_64_mmu_radix.c | 2 +- > arch/powerpc/kvm/book3s_pr.c | 3 --- > arch/powerpc/kvm/powerpc.c | 2 +- > arch/powerpc/platforms/52xx/mpc52xx_pic.c | 2 +- > arch/s390/kernel/smp.c | 2 +- > arch/x86/kernel/quirks.c | 10 +++++----- > arch/x86/kvm/mmu/mmu.c | 2 +- > arch/x86/kvm/mmu/paging_tmpl.h | 2 +- > arch/x86/kvm/x86.c | 2 +- > arch/x86/mm/numa.c | 18 +++++++++--------- > block/blk-merge.c | 2 +- > drivers/acpi/acpi_pad.c | 2 +- > drivers/ata/libata-scsi.c | 2 +- > drivers/atm/zatm.c | 2 +- > drivers/block/drbd/drbd_nl.c | 6 +++--- > drivers/block/drbd/drbd_state.c | 2 +- > drivers/block/rbd.c | 2 +- > drivers/clk/clk-gate.c | 2 +- > drivers/clk/spear/clk-vco-pll.c | 2 +- > drivers/clk/st/clkgen-fsyn.c | 1 - > drivers/firewire/ohci.c | 14 +++++++------- > drivers/gpu/drm/bridge/sil-sii8620.c | 2 +- > drivers/gpu/drm/drm_edid.c | 2 +- > drivers/gpu/drm/exynos/exynos_drm_dsi.c | 6 +++--- > drivers/gpu/drm/i915/display/intel_fbc.c | 2 +- > drivers/gpu/drm/i915/gt/intel_lrc.c | 2 +- > drivers/gpu/drm/i915/intel_uncore.c | 2 +- > .../gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 4 ++-- > drivers/i2c/busses/i2c-rk3x.c | 2 +- > drivers/ide/ide-acpi.c | 2 +- > drivers/ide/ide-atapi.c | 2 +- > drivers/ide/ide-io-std.c | 4 ++-- > drivers/ide/ide-io.c | 8 ++++---- > drivers/ide/ide-sysfs.c | 2 +- > drivers/ide/ide-taskfile.c | 1 - > drivers/ide/umc8672.c | 2 +- > drivers/idle/intel_idle.c | 2 +- > drivers/infiniband/core/uverbs_cmd.c | 4 ++-- > drivers/infiniband/hw/cxgb4/cm.c | 2 +- > drivers/infiniband/hw/cxgb4/cq.c | 2 +- > drivers/infiniband/hw/mlx4/qp.c | 6 +++--- > drivers/infiniband/hw/mlx5/cq.c | 6 +++--- > drivers/infiniband/hw/mlx5/devx.c | 2 +- > drivers/infiniband/hw/mlx5/wr.c | 2 +- > drivers/infiniband/hw/mthca/mthca_qp.c | 10 +++++----- > drivers/infiniband/sw/siw/siw_qp_rx.c | 2 +- > drivers/input/serio/serio_raw.c | 2 +- > drivers/input/touchscreen/sur40.c | 4 +--- > drivers/iommu/intel/iommu.c | 2 +- > drivers/md/dm-io.c | 2 +- > drivers/md/dm-ioctl.c | 2 +- > drivers/md/dm-snap-persistent.c | 2 +- > drivers/md/dm-table.c | 2 +- > drivers/md/dm-writecache.c | 2 +- > drivers/md/raid5.c | 2 +- > drivers/media/dvb-frontends/rtl2832.c | 2 +- > drivers/media/tuners/qt1010.c | 4 ++-- > drivers/media/usb/gspca/vicam.c | 2 +- > drivers/media/usb/uvc/uvc_video.c | 8 ++++---- > drivers/memstick/host/jmb38x_ms.c | 2 +- > drivers/memstick/host/tifm_ms.c | 2 +- > drivers/mmc/host/sdhci.c | 2 +- > drivers/mtd/nand/raw/nand_ecc.c | 2 +- > drivers/mtd/nand/raw/s3c2410.c | 2 +- > drivers/mtd/parsers/afs.c | 4 ++-- > drivers/mtd/ubi/eba.c | 2 +- > drivers/net/can/janz-ican3.c | 2 +- > drivers/net/ethernet/broadcom/bnx2.c | 4 ++-- > .../ethernet/mellanox/mlx5/core/pagealloc.c | 4 ++-- > drivers/net/ethernet/neterion/s2io.c | 2 +- > drivers/net/ethernet/qlogic/qla3xxx.c | 2 +- > drivers/net/ethernet/sun/cassini.c | 2 +- > drivers/net/ethernet/sun/niu.c | 6 +++--- > drivers/net/wan/z85230.c | 2 +- > drivers/net/wireless/ath/ath10k/core.c | 2 +- > drivers/net/wireless/ath/ath6kl/init.c | 2 +- > drivers/net/wireless/ath/ath9k/init.c | 2 +- > drivers/net/wireless/broadcom/b43/debugfs.c | 2 +- > drivers/net/wireless/broadcom/b43/dma.c | 2 +- > drivers/net/wireless/broadcom/b43/lo.c | 2 +- > drivers/net/wireless/broadcom/b43/phy_n.c | 4 ++-- > drivers/net/wireless/broadcom/b43/xmit.c | 12 ++++++------ > .../net/wireless/broadcom/b43legacy/debugfs.c | 2 +- > drivers/net/wireless/broadcom/b43legacy/main.c | 2 +- > drivers/net/wireless/intel/iwlegacy/3945.c | 2 +- > drivers/net/wireless/intel/iwlegacy/4965-mac.c | 2 +- > .../wireless/realtek/rtlwifi/rtl8192cu/hw.c | 8 ++++---- > drivers/pci/pcie/aer.c | 2 +- > drivers/platform/x86/hdaps.c | 4 ++-- > drivers/scsi/dc395x.c | 2 +- > drivers/scsi/pm8001/pm8001_hwi.c | 2 +- > drivers/scsi/pm8001/pm80xx_hwi.c | 2 +- > drivers/spi/spi-davinci.c | 1 - > drivers/ssb/driver_chipcommon.c | 4 ++-- > drivers/tty/cyclades.c | 2 +- > drivers/tty/isicom.c | 2 +- > drivers/usb/musb/cppi_dma.c | 2 +- > drivers/usb/storage/sddr55.c | 4 ++-- > drivers/vhost/net.c | 6 +++--- > drivers/video/fbdev/matrox/matroxfb_maven.c | 6 +++--- > drivers/video/fbdev/pm3fb.c | 6 +++--- > drivers/video/fbdev/riva/riva_hw.c | 3 +-- > drivers/virtio/virtio_ring.c | 6 +++--- > fs/afs/dir.c | 2 +- > fs/afs/security.c | 2 +- > fs/dlm/netlink.c | 2 +- > fs/erofs/data.c | 4 ++-- > fs/erofs/zdata.c | 2 +- > fs/f2fs/data.c | 4 +--- > fs/fat/dir.c | 2 +- > fs/fuse/control.c | 4 ++-- > fs/fuse/cuse.c | 2 +- > fs/fuse/file.c | 2 +- > fs/gfs2/aops.c | 2 +- > fs/gfs2/bmap.c | 2 +- > fs/gfs2/lops.c | 2 +- > fs/hfsplus/unicode.c | 2 +- > fs/isofs/namei.c | 4 ++-- > fs/jffs2/erase.c | 2 +- > fs/nfsd/nfsctl.c | 2 +- > fs/ocfs2/alloc.c | 4 ++-- > fs/ocfs2/dir.c | 14 +++++++------- > fs/ocfs2/extent_map.c | 4 ++-- > fs/ocfs2/namei.c | 2 +- > fs/ocfs2/refcounttree.c | 2 +- > fs/ocfs2/xattr.c | 2 +- > fs/omfs/file.c | 2 +- > fs/overlayfs/copy_up.c | 2 +- > fs/ubifs/commit.c | 6 +++--- > fs/ubifs/dir.c | 2 +- > fs/ubifs/file.c | 4 ++-- > fs/ubifs/journal.c | 4 ++-- > fs/ubifs/lpt.c | 2 +- > fs/ubifs/tnc.c | 6 +++--- > fs/ubifs/tnc_misc.c | 4 ++-- > fs/udf/balloc.c | 2 +- > fs/xfs/xfs_bmap_util.c | 2 +- > include/linux/compiler-clang.h | 2 -- > include/linux/compiler-gcc.h | 6 ------ > include/linux/page-flags-layout.h | 4 +++- > include/net/flow_offload.h | 2 +- > kernel/async.c | 4 ++-- > kernel/audit.c | 2 +- > kernel/debug/kdb/kdb_io.c | 2 +- > kernel/dma/debug.c | 2 +- > kernel/events/core.c | 2 +- > kernel/events/uprobes.c | 2 +- > kernel/exit.c | 2 +- > kernel/futex.c | 14 +++++++------- > kernel/locking/lockdep.c | 16 ++++++++-------- > kernel/trace/ring_buffer.c | 2 +- > lib/radix-tree.c | 2 +- > lib/test_lockup.c | 2 +- > mm/debug_vm_pgtable.c | 2 +- > mm/frontswap.c | 2 +- > mm/ksm.c | 2 +- > mm/memcontrol.c | 2 +- > mm/memory.c | 2 +- > mm/mempolicy.c | 4 ++-- > mm/page_alloc.c | 2 +- > mm/percpu.c | 2 +- > mm/slub.c | 4 ++-- > mm/swap.c | 4 ++-- > net/dccp/options.c | 2 +- > net/ipv4/netfilter/nf_socket_ipv4.c | 6 +++--- > net/ipv6/ip6_flowlabel.c | 2 +- > net/ipv6/netfilter/nf_socket_ipv6.c | 2 +- > net/netfilter/nf_conntrack_ftp.c | 2 +- > net/netfilter/nfnetlink_log.c | 2 +- > net/netfilter/nfnetlink_queue.c | 4 ++-- > net/sched/cls_flow.c | 2 +- > net/sched/sch_cake.c | 2 +- > net/sched/sch_cbq.c | 2 +- > net/sched/sch_fq_codel.c | 2 +- > net/sched/sch_fq_pie.c | 2 +- > net/sched/sch_hfsc.c | 2 +- > net/sched/sch_htb.c | 2 +- > net/sched/sch_sfq.c | 2 +- > net/sunrpc/svcsock.c | 4 ++-- > net/sunrpc/xprtsock.c | 10 +++++----- > net/tls/tls_sw.c | 2 +- > scripts/checkpatch.pl | 16 +++++----------- > sound/core/control_compat.c | 2 +- > sound/isa/sb/sb16_csp.c | 2 +- > sound/usb/endpoint.c | 2 +- > tools/include/linux/compiler.h | 2 -- > tools/virtio/linux/kernel.h | 2 -- > 196 files changed, 321 insertions(+), 330 deletions(-) > > -- > 2.25.1 > > -- > You received this message because you are subscribed to the Google Groups "Clang Built Linux" group. > To unsubscribe from this group and stop receiving emails from it, send an email to clang-built-linux+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/clang-built-linux/20200620033007.1444705-1-keescook%40chromium.org.
