[Bug sanitizer/81715] asan-stack=1 redzone allocation is too inflexible

Tue Sep 25 09:08:00 GMT 2018

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715

--- Comment #29 from Martin Liška <marxin at gcc dot gnu.org> ---
I'm got a patch candidate for which I did testing of allmodconfig
configuration.
Sorting all violations against 2KB of stack memory:

Before:
TOTAL warnings: 185

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:5653:1:     23624

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4518:1:     14144

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3882:1:     11504

lib/atomic64_test.c:250:1:     11192

lib/atomic64_test.c:148:1:     10352

drivers/net/wireless/ralink/rt2x00/rt73usb.c:1294:1:      8680

drivers/net/wireless/ralink/rt2x00/rt2500pci.c:1047:1:      7712

drivers/net/wireless/ralink/rt2x00/rt2500usb.c:891:1:      7592

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:2717:1:      7472

drivers/media/dvb-frontends/stv090x.c:3431:1:      6808

mm/vmscan.c:1497:1:      6688

fs/fscache/stats.c:286:1:      6536

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:8659:1:      6456

drivers/media/dvb-frontends/stv090x.c:3090:1:      5880

lib/test_overflow.c:483:1:      5856

drivers/net/wireless/ralink/rt2x00/rt61pci.c:1647:1:      5792

drivers/media/dvb-frontends/stv090x.c:1595:1:      5304

drivers/scsi/fnic/fnic_trace.c:451:1:      5008

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:2420:1:      4912

drivers/media/dvb-frontends/stv090x.c:4265:1:      4840

net/wireless/nl80211.c:2102:1:      4656

drivers/net/wireless/ralink/rt2x00/rt61pci.c:2631:1:      4416

drivers/net/wireless/realtek/rtl818x/rtl8180/rtl8225se.c:431:1:      4376

drivers/scsi/lpfc/lpfc_attr.c:510:1:      4272

fs/btrfs/relocation.c:1149:1:      4224

drivers/staging/rtlwifi/btcoexist/halbtc8822b2ant.c:3545:1:      4216

drivers/acpi/nfit/core.c:3213:1:      4176

drivers/net/wireless/ralink/rt2x00/rt2400pci.c:909:1:      4128

drivers/net/wireless/ralink/rt2x00/rt61pci.c:1963:1:      4032

drivers/net/wireless/ralink/rt2x00/rt73usb.c:1853:1:      4000

drivers/net/wireless/ralink/rt2x00/rt61pci.c:2497:1:      3968

fs/jbd2/commit.c:1129:1:      3920

drivers/scsi/lpfc/lpfc_debugfs.c:978:1:      3896

fs/ocfs2/super.c:1234:1:      3856

drivers/media/dvb-frontends/cxd2841er.c:3302:1:      3816

drivers/media/dvb-frontends/stv0910.c:1547:1:      3808

drivers/media/dvb-frontends/stv0367.c:2607:1:      3744

net/core/ethtool.c:2872:1:      3584

drivers/net/wireless/ralink/rt2x00/rt73usb.c:1962:1:      3472

kernel/rcu/tree.c:2239:1:      3448

drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16563:1:      3424

fs/ocfs2/namei.c:1691:1:      3400

drivers/net/wireless/ralink/rt2x00/rt73usb.c:1527:1:      3392

mm/khugepaged.c:1565:1:      3296

drivers/media/dvb-frontends/stv090x.c:1952:1:      3272

drivers/staging/rtl8723bs/hal/HalBtc8723b2Ant.c:2924:1:      3208

kernel/fork.c:2104:1:      3192

drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16905:1:      3160

drivers/media/dvb-frontends/cxd2841er.c:3501:1:      3152

drivers/scsi/snic/snic_debugfs.c:355:1:      3064

fs/ocfs2/aops.c:1906:1:      3032

drivers/media/dvb-frontends/stv090x.c:1854:1:      3008

drivers/net/wireless/ralink/rt2x00/rt2400pci.c:1171:1:      2992

drivers/net/wireless/ralink/rt2x00/rt2400pci.c:399:1:      2984

drivers/net/wireless/ralink/rt2x00/rt2500pci.c:405:1:      2984

drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1434:1:      2976

arch/x86/kernel/cpu/mshyperv.c:307:1:      2960

net/sched/cls_flower.c:1286:1:      2936

drivers/isdn/hardware/avm/b1.c:637:1:      2936

fs/f2fs/segment.c:4182:1:      2912

drivers/scsi/mpt3sas/mpt3sas_scsih.c:9467:1:      2904

net/rxrpc/call_event.c:459:1:      2896

drivers/rapidio/devices/rio_mport_cdev.c:2129:1:      2872

drivers/net/wireless/ralink/rt2x00/rt61pci.c:1503:1:      2848

fs/nfs/write.c:1357:1:      2840

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3999:1:      2840

fs/nfs/pnfs.c:2023:1:      2832

net/caif/cfctrl.c:549:1:      2824

drivers/block/drbd/drbd_req.c:1447:1:      2800

mm/gup.c:1757:1:      2792

fs/ocfs2/xattr.c:3686:1:      2784

drivers/media/dvb-frontends/cxd2841er.c:3639:1:      2784

fs/ocfs2/super.c:2355:1:      2768

net/sctp/socket.c:7632:1:      2768

drivers/net/wireless/ralink/rt2x00/rt73usb.c:734:1:      2760

drivers/net/ethernet/rocker/rocker_ofdpa.c:563:1:      2760

net/rxrpc/input.c:1362:1:      2752

drivers/net/wireless/ralink/rt2x00/rt2500pci.c:1323:1:      2752

drivers/media/dvb-frontends/cxd2841er.c:3132:1:      2744

fs/btrfs/disk-io.c:3341:1:      2720

drivers/iio/common/ssp_sensors/ssp_spi.c:449:1:      2720

fs/f2fs/gc.c:825:1:      2704

fs/xfs/libxfs/xfs_rmap.c:1348:1:      2696

fs/ocfs2/dlm/dlmmaster.c:2767:1:      2664

lib/test_overflow.c:588:1:      2648

net/core/rtnetlink.c:1700:1:      2648

drivers/gpu/drm/tinydrm/ili9225.c:260:1:      2616

drivers/net/wireless/ralink/rt2x00/rt2500usb.c:591:1:      2616

fs/f2fs/gc.c:1250:1:      2608

fs/nfsd/export.c:652:1:      2608

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:6805:1:      2608

mm/rmap.c:1627:1:      2600

net/bridge/br_netlink.c:1481:1:      2592

drivers/media/tuners/r820t.c:1327:1:      2576

drivers/media/dvb-frontends/stv090x.c:2069:1:      2544

drivers/scsi/qla2xxx/qla_isr.c:1257:1:      2544

fs/btrfs/tree-log.c:3185:1:      2528

drivers/md/md.c:8645:1:      2528

drivers/media/dvb-frontends/stv090x.c:2508:1:      2528

lib/rbtree.c:481:1:      2520

lib/rbtree.c:463:1:      2520

mm/page_alloc.c:5041:1:      2512

mm/migrate.c:576:1:      2512

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4834:1:      2512

net/rxrpc/recvmsg.c:608:1:      2488

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3181:1:      2488

drivers/firmware/efi/test/efi_test.c:688:1:      2480

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:836:1:      2480

drivers/media/pci/solo6x10/solo6x10-disp.c:289:1:      2472

net/mac80211/util.c:2263:1:      2464

drivers/gpu/drm/nouveau/nvkm/subdev/i2c/anx9805.c:189:1:      2464

mm/ksm.c:2180:1:      2456

fs/ocfs2/dlm/dlmrecovery.c:752:1:      2456

drivers/block/drbd/drbd_req.c:1624:1:      2448

drivers/input/mouse/cyapa_gen5.c:2434:1:      2440

drivers/net/macsec.c:2597:1:      2432

drivers/scsi/fnic/fnic_fcs.c:918:1:      2424

net/rxrpc/rxkad.c:399:1:      2400

fs/nilfs2/segment.c:1530:1:      2392

fs/cachefiles/rdwr.c:674:1:      2384

mm/memory-failure.c:1925:1:      2384

fs/userfaultfd.c:1843:1:      2384

net/wireless/nl80211.c:4796:1:      2376

drivers/scsi/lpfc/lpfc_nvmet.c:1462:1:      2376

fs/ocfs2/namei.c:2064:1:      2368

drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1122:1:      2368

drivers/infiniband/hw/hfi1/rc.c:2482:1:      2360

fs/ocfs2/dlm/dlmmaster.c:1013:1:      2352

drivers/media/dvb-frontends/cxd2841er.c:3211:1:      2344

net/wireless/nl80211.c:6130:1:      2328

drivers/input/touchscreen/ads7846.c:1459:1:      2312

mm/swapfile.c:2236:1:      2304

mm/migrate.c:726:1:      2304

fs/ocfs2/dir.c:3107:1:      2304

sound/soc/intel/haswell/sst-haswell-ipc.c:640:1:      2296

net/smc/smc_cdc.c:323:1:      2296

drivers/media/i2c/saa6752hs.c:555:1:      2288

net/wireless/nl80211.c:1586:1:      2272

drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:26034:1:      2272

mm/shmem.c:1937:1:      2256

fs/xfs/xfs_log_recover.c:2008:1:      2256

fs/f2fs/file.c:1189:1:      2248

net/ieee802154/nl802154.c:551:1:      2248

drivers/block/drbd/drbd_state.c:2039:1:      2240

fs/ocfs2/namei.c:503:1:      2232

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:1681:1:      2224

mm/memory-failure.c:1419:1:      2216

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:7378:1:      2216

mm/madvise.c:441:1:      2208

drivers/net/virtio_net.c:984:1:      2200

drivers/media/dvb-frontends/stv0910.c:1613:1:      2192

drivers/media/i2c/cx25840/cx25840-core.c:460:1:      2192

drivers/net/wireless/ath/ath9k/ar9003_eeprom.c:5138:1:      2176

drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c:830:1:      2168

drivers/isdn/hardware/eicon/message.c:5985:1:      2160

drivers/media/pci/saa7134/saa7134-cards.c:8068:1:      2160

arch/x86/kvm/emulate.c:2562:1:      2152

drivers/net/wireless/ath/ath9k/ar9003_mac.c:158:1:      2152

fs/xfs/libxfs/xfs_alloc.c:1383:1:      2144

lib/test_overflow.c:606:1:      2128

drivers/i2c/busses/i2c-fsi.c:638:1:      2128

arch/x86/kvm/x86.c:4059:1:      2120

fs/btrfs/scrub.c:3394:1:      2112

block/blk-cgroup.c:1026:1:      2112

drivers/staging/erofs/unzip_vle.c:999:1:      2112

drivers/media/dvb-frontends/stv090x.c:4580:1:      2104

drivers/media/dvb-frontends/stv090x.c:2137:1:      2104

drivers/net/ethernet/intel/igb/igb_ethtool.c:2079:1:      2104

drivers/scsi/qla4xxx/ql4_nx.c:3218:1:      2104

fs/ntfs/mft.c:2764:1:      2096

net/wireless/scan.c:1059:1:      2096

drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c:4349:1:      2096

drivers/net/ethernet/broadcom/cnic.c:2725:1:      2096

net/rxrpc/rxkad.c:499:1:      2088

drivers/net/bonding/bond_netlink.c:677:1:      2088

mm/shmem.c:987:1:      2080

fs/f2fs/debug.c:130:1:      2080

drivers/gpu/drm/nouveau/nvkm/subdev/i2c/anx9805.c:95:1:      2080

drivers/media/dvb-frontends/stv090x.c:1207:1:      2080

drivers/media/dvb-frontends/stv090x.c:1164:1:      2080

drivers/staging/pi433/rf69.c:613:1:      2080

net/mac802154/iface.c:201:1:      2072

fs/ocfs2/dlm/dlmmaster.c:2050:1:      2064

drivers/media/dvb-frontends/stv090x.c:4774:1:      2064

mm/compaction.c:959:1:      2056

after:

TOTAL warnings: 43

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:5653:1:     11880

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4518:1:      7264

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3882:1:      5840

lib/atomic64_test.c:250:1:      5656

lib/atomic64_test.c:148:1:      5232

drivers/net/wireless/ralink/rt2x00/rt73usb.c:1294:1:      4392

drivers/net/wireless/ralink/rt2x00/rt2500pci.c:1047:1:      3904

drivers/net/wireless/ralink/rt2x00/rt2500usb.c:891:1:      3848

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:2717:1:      3792

drivers/media/dvb-frontends/stv090x.c:3431:1:      3512

mm/vmscan.c:1497:1:      3488

fs/fscache/stats.c:286:1:      3336

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:8659:1:      3288

drivers/media/dvb-frontends/stv090x.c:3090:1:      3032

lib/test_overflow.c:483:1:      2976

drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16563:1:      2976

drivers/net/wireless/ralink/rt2x00/rt61pci.c:1647:1:      2944

drivers/media/dvb-frontends/stv090x.c:1595:1:      2712

drivers/scsi/fnic/fnic_trace.c:451:1:      2640

drivers/media/dvb-frontends/stv0910.c:1547:1:      2624

drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16905:1:      2616

net/wireless/nl80211.c:2102:1:      2544

drivers/net/wireless/ralink/rt2x00/rt2800lib.c:2420:1:      2512

net/core/ethtool.c:2872:1:      2496

fs/jbd2/commit.c:1129:1:      2480

drivers/media/dvb-frontends/stv090x.c:4265:1:      2472

net/sched/cls_flower.c:1286:1:      2392

fs/btrfs/relocation.c:1149:1:      2368

drivers/acpi/nfit/core.c:3213:1:      2352

drivers/scsi/lpfc/lpfc_attr.c:510:1:      2320

drivers/net/wireless/ralink/rt2x00/rt61pci.c:2631:1:      2272

drivers/net/wireless/realtek/rtl818x/rtl8180/rtl8225se.c:431:1:      2264

drivers/iio/common/ssp_sensors/ssp_spi.c:449:1:      2176

drivers/staging/rtlwifi/btcoexist/halbtc8822b2ant.c:3545:1:      2168

fs/ocfs2/super.c:1234:1:      2160

fs/ocfs2/namei.c:1691:1:      2152

drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:26034:1:      2144

kernel/rcu/tree.c:2239:1:      2136

drivers/net/wireless/ralink/rt2x00/rt2400pci.c:909:1:      2112

drivers/net/wireless/ralink/rt2x00/rt61pci.c:1963:1:      2080

drivers/net/wireless/ralink/rt2x00/rt61pci.c:2497:1:      2080

drivers/scsi/lpfc/lpfc_debugfs.c:978:1:      2072

drivers/scsi/mpt3sas/mpt3sas_scsih.c:9467:1:      2072

Which is very promising improvement I would say.