ci starts bisection 2024-10-04 22:20:20.238468778 +0000 UTC m=+132159.684323886 bisecting cause commit starting from c02d24a5af66a9806922391493205a344749f2c4 building syzkaller on d7906effc263366a8b067258cec67072b29aa5e0 fetch other tags and check if the commit is present ensuring issue is reproducible on original commit c02d24a5af66a9806922391493205a344749f2c4 testing commit c02d24a5af66a9806922391493205a344749f2c4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7a7d910f232c9597ec7078107a3d7731e01adeed0c795034dd6f685ffc45312a run #0: crashed: KFENCE: memory corruption in pskb_expand_head run #1: crashed: KFENCE: memory corruption in pskb_expand_head run #2: crashed: KFENCE: memory corruption in pskb_expand_head run #3: crashed: KFENCE: memory corruption in pskb_expand_head run #4: crashed: KFENCE: memory corruption in pskb_expand_head run #5: crashed: KFENCE: memory corruption in pskb_expand_head run #6: crashed: KFENCE: memory corruption in pskb_expand_head run #7: crashed: KFENCE: memory corruption in pskb_expand_head run #8: crashed: KFENCE: memory corruption in pskb_expand_head run #9: crashed: KFENCE: memory corruption in pskb_expand_head run #10: crashed: KFENCE: memory corruption in pskb_expand_head run #11: crashed: KFENCE: memory corruption in pskb_expand_head run #12: crashed: KFENCE: memory corruption in pskb_expand_head run #13: crashed: KFENCE: memory corruption in pskb_expand_head run #14: crashed: KFENCE: memory corruption in pskb_expand_head run #15: crashed: KFENCE: memory corruption in pskb_expand_head run #16: boot failed: KFENCE: memory corruption in add_sysfs_param run #17: boot failed: KFENCE: memory corruption in add_sysfs_param run #18: boot failed: KFENCE: memory corruption in add_sysfs_param run #19: boot failed: KFENCE: memory corruption in add_sysfs_param representative crash: KFENCE: memory corruption in pskb_expand_head, types: [UNKNOWN] check whether we can drop unnecessary instrumentation disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit c02d24a5af66a9806922391493205a344749f2c4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 13c60fd9f4f843fff30c7afadd143340213d8403577846d87e59f5000dba9294 all runs: crashed: KFENCE: memory corruption in pskb_expand_head representative crash: KFENCE: memory corruption in pskb_expand_head, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=4045 full=8198 leaves diff=2110 split chunks (needed=false): <2110> split chunk #0 of len 2110 into 5 parts testing without sub-chunk 1/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit c02d24a5af66a9806922391493205a344749f2c4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9c28bb94dc727587e6b58ef6ccc48c22ec760ae5dfd5f0e7f431f27929a067da all runs: crashed: KFENCE: memory corruption in pskb_expand_head representative crash: KFENCE: memory corruption in pskb_expand_head, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit c02d24a5af66a9806922391493205a344749f2c4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f57a6200b5255a3e41a3a21ae227c48471dbd1dd6bea2128f5c6897aaa4de230 all runs: crashed: KFENCE: memory corruption in pskb_expand_head representative crash: KFENCE: memory corruption in pskb_expand_head, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit c02d24a5af66a9806922391493205a344749f2c4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9bc2f7d8de3e6de705651f2accfc5ab1fcd2e7a444f554eef82e5386142d2164 all runs: crashed: KFENCE: memory corruption in pskb_expand_head representative crash: KFENCE: memory corruption in pskb_expand_head, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit c02d24a5af66a9806922391493205a344749f2c4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b1f30091519192b973720f7af4064dbe7640e75a94593a1f2698e66db572867c all runs: crashed: KFENCE: memory corruption in pskb_expand_head representative crash: KFENCE: memory corruption in pskb_expand_head, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit c02d24a5af66a9806922391493205a344749f2c4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a99cacaf4e8ce44bed79789eeae186987772988c73df18352bd6a0a016ee4222 run #0: crashed: lost connection to test machine run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: lost connection to test machine, types: [UNKNOWN] unable to determine the verdict: 9 good runs (wanted 5), for bad wanted 5 in total, got 10 minimized to 422 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC DVB_CORE EXTCON FB GPIOLIB HID_ZEROPLUS I2C_MUX IIO IOMMUFD IRQ_REMAP KVM KVM_INTEL LIBNVDIMM MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE 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USB_NET_CDCETHER USB_NET_CDC_EEM USB_NET_CDC_MBIM USB_NET_CDC_NCM USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_CH9200 USB_NET_CX82310_ETH USB_NET_DM9601 USB_NET_GL620A USB_NET_HUAWEI_CDC_NCM USB_NET_INT51X1 USB_NET_KALMIA USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_QMI_WWAN USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_OXU210HP_HCD USB_PEGASUS USB_PULSE8_CEC USB_PWC USB_PWC_INPUT_EVDEV USB_PXA27X USB_R8A66597 USB_R8A66597_HCD USB_RAINSHADOW_CEC USB_RAREMONO USB_RAW_GADGET USB_RTL8150 USB_RTL8152 USB_RTL8153_ECM USB_S2255 USB_SERIAL USB_SERIAL_AIRCABLE USB_SERIAL_ARK3116 USB_SERIAL_BELKIN USB_SERIAL_CH341 USB_SERIAL_CONSOLE USB_SERIAL_CP210X USB_SERIAL_CYBERJACK USB_SERIAL_CYPRESS_M8 USB_SERIAL_DEBUG USB_SERIAL_DIGI_ACCELEPORT USB_SERIAL_EDGEPORT USB_SERIAL_EDGEPORT_TI USB_SERIAL_EMPEG USB_SERIAL_F81232 USB_SERIAL_F8153X USB_SERIAL_FTDI_SIO USB_SERIAL_GARMIN USB_SERIAL_GENERIC USB_SERIAL_IPAQ USB_SERIAL_IPW USB_SERIAL_IR USB_SERIAL_IUU USB_SERIAL_KEYSPAN USB_SERIAL_KEYSPAN_PDA USB_SERIAL_KLSI USB_SERIAL_KOBIL_SCT USB_SERIAL_MCT_U232 USB_SERIAL_METRO USB_SERIAL_MOS7715_PARPORT USB_SERIAL_MOS7720 USB_SERIAL_MOS7840 USB_SERIAL_MXUPORT USB_SERIAL_NAVMAN USB_SERIAL_OMNINET USB_SERIAL_OPTICON USB_SERIAL_OPTION USB_SERIAL_OTI6858 USB_SERIAL_PL2303 USB_SERIAL_QCAUX USB_SERIAL_QT2 USB_SERIAL_QUALCOMM USB_SERIAL_SAFE USB_SERIAL_SIERRAWIRELESS USB_SERIAL_SIMPLE USB_SERIAL_SPCP8X5 USB_SERIAL_SSU100 USB_SERIAL_SYMBOL USB_SERIAL_TI USB_SERIAL_UPD78F0730 USB_SERIAL_VISOR USB_SERIAL_WHITEHEAT USB_SERIAL_WISHBONE USB_SERIAL_WWAN USB_SERIAL_XR USB_SERIAL_XSENS_MT USB_SEVSEG USB_SI470X USB_SI4713 USB_SIERRA_NET USB_SISUSBVGA USB_SL811_CS USB_SL811_HCD USB_SL811_HCD_ISO USB_SNP_CORE USB_SPEEDTOUCH USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_UAS USB_UEAGLEATM USB_ULPI_BUS USB_USBNET USB_USS720 USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_VIDEO_CLASS USB_VIDEO_CLASS_INPUT_EVDEV USB_VL600 USB_WDM USB_XHCI_DBGCAP USB_XHCI_PCI_RENESAS USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USERMODE_DRIVER USER_RETURN_NOTIFIER UVC_COMMON U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VETH VFIO VFIO_DEVICE_CDEV VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_PCI_MMAP VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_TASK VHOST_VDPA VHOST_VSOCK VIDEO VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOMODE_HELPERS VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_SILABS X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK X86_X2APIC X86_X32_ABI XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XILLYBUS_CLASS XILLYUSB XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA Z3FOLD Z3FOLD_DEPRECATED ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZPOOL ZRAM ZRAM_BACKEND_FORCE_LZO ZRAM_BACKEND_LZO ZRAM_DEF_COMP_LZO ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_842 ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_Z3FOLD_DEPRECATED] disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed picked [v6.11 v6.10 v6.9 v6.7 v6.5 v6.3 v6.1 v5.19 v5.16 v5.13 v5.10 v5.7 v5.4 v5.1 v4.19] out of 34 release tags testing release v6.11 testing commit 98f7e32f20d28ec452afb208f9cffc08448a2652 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ba477f3e264ce4788a7633caf73d550446b2d60587e595e18e6254aeab3ad24d all runs: OK false negative chance: 0.000 # git bisect start c02d24a5af66a9806922391493205a344749f2c4 98f7e32f20d28ec452afb208f9cffc08448a2652 Bisecting: 7149 revisions left to test after this (roughly 13 steps) [de848da12f752170c2ebe114804a985314fd5a6a] Merge tag 'drm-next-2024-09-19' of https://gitlab.freedesktop.org/drm/kernel testing commit de848da12f752170c2ebe114804a985314fd5a6a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 578f1201855c0704548a0ceac5dbe17bc725a64affbea79989dfd9f307971281 all runs: OK false negative chance: 0.000 # git bisect good de848da12f752170c2ebe114804a985314fd5a6a Bisecting: 3572 revisions left to test after this (roughly 12 steps) [5159938e10d876fd23d3a5474689a9f6e18a446e] Merge tag 'probes-v6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace testing commit 5159938e10d876fd23d3a5474689a9f6e18a446e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1d1b717a7eaaf274ce333a5ff62e28a63d2e9001c488ed3822a574ff48343990 all runs: OK false negative chance: 0.000 # git bisect good 5159938e10d876fd23d3a5474689a9f6e18a446e Bisecting: 1797 revisions left to test after this (roughly 11 steps) [f41cf56a40cb84e4b13a59b6bd4abaf88cd35a41] Merge branch 'mm-everything' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm testing commit f41cf56a40cb84e4b13a59b6bd4abaf88cd35a41 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bb376bba9053bfa4dca931f16cad220bbc566973398c8713ebea6907787bd206 all runs: OK false negative chance: 0.000 # git bisect good f41cf56a40cb84e4b13a59b6bd4abaf88cd35a41 Bisecting: 909 revisions left to test after this (roughly 10 steps) [473aee2db0ef5a3cdf3461f318003d7267533c19] Merge branch 'for-linux-next' of https://gitlab.freedesktop.org/drm/misc/kernel.git testing commit 473aee2db0ef5a3cdf3461f318003d7267533c19 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2d1c9c5987fac4f232d30a82392c81cd8a18d37727c772537d4b19bef0a9e505 all runs: OK false negative chance: 0.000 # git bisect good 473aee2db0ef5a3cdf3461f318003d7267533c19 Bisecting: 451 revisions left to test after this (roughly 9 steps) [2cc838c4e78dee4ec6ace57ad1f049beec90389b] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git testing commit 2cc838c4e78dee4ec6ace57ad1f049beec90389b gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a6a5070f8bea3f3fa5e278ae6017d1986089be8fcfd582d80fc0dafa309f2a61 all runs: OK false negative chance: 0.000 # git bisect good 2cc838c4e78dee4ec6ace57ad1f049beec90389b Bisecting: 223 revisions left to test after this (roughly 8 steps) [0f0a955f1f8e67f14a8ba7cd92f9f783b14cddc5] Merge branch 'togreg' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git testing commit 0f0a955f1f8e67f14a8ba7cd92f9f783b14cddc5 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d3649d834688a14fa72581d1e4ee3ff378a5622c301cf5f5a7fcf205fa11fbf3 all runs: OK false negative chance: 0.000 # git bisect good 0f0a955f1f8e67f14a8ba7cd92f9f783b14cddc5 Bisecting: 133 revisions left to test after this (roughly 7 steps) [ad088ec98de59a9e92828202b490d8230c323e51] Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git testing commit ad088ec98de59a9e92828202b490d8230c323e51 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c6a3a110646dc3c779d1220e926373074a4190bc0addf4b46cc5c5f81f3e1904 all runs: OK false negative chance: 0.000 # git bisect good ad088ec98de59a9e92828202b490d8230c323e51 Bisecting: 66 revisions left to test after this (roughly 6 steps) [0e2807cecb0f8be4c8416e9dcf54b80f106671b8] Merge branch 'ntb-next' of https://github.com/jonmason/ntb.git testing commit 0e2807cecb0f8be4c8416e9dcf54b80f106671b8 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f991c814fbc461991582f731f7b70671a7b3bf145b9a6c27bd99a1da07d27ea4 all runs: OK false negative chance: 0.000 # git bisect good 0e2807cecb0f8be4c8416e9dcf54b80f106671b8 Bisecting: 37 revisions left to test after this (roughly 5 steps) [d86c7f3a4c32812c5bac2aa908fff6661201932e] Merge branch 'slab/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git testing commit d86c7f3a4c32812c5bac2aa908fff6661201932e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: cdd57282eeda81df10d3ddb136ac14f1327448bea619b80d3285fd2763f23254 all runs: crashed: KFENCE: memory corruption in pskb_expand_head representative crash: KFENCE: memory corruption in pskb_expand_head, types: [UNKNOWN] # git bisect bad d86c7f3a4c32812c5bac2aa908fff6661201932e Bisecting: 15 revisions left to test after this (roughly 4 steps) [75691a7ee68682e8e8010d8d6dee673908895c0f] Merge branch 'zstd-next' of https://github.com/terrelln/linux.git testing commit 75691a7ee68682e8e8010d8d6dee673908895c0f gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a9ebfe5ca6b826cbacc8b79da4a6a9b2d1df228bc3338359de06a57ad2ccfc03 all runs: OK false negative chance: 0.000 # git bisect good 75691a7ee68682e8e8010d8d6dee673908895c0f Bisecting: 5 revisions left to test after this (roughly 3 steps) [42e0dcb66ed0ce9a489b76681244359cb3d98b21] Merge branch 'slab/for-6.13/fixes' into slab/for-next testing commit 42e0dcb66ed0ce9a489b76681244359cb3d98b21 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 50eb64af1c5eec4492079fa55e46d52fe6cf2de8181d8df4c45513a3a3652efd all runs: crashed: KFENCE: memory corruption in pskb_expand_head representative crash: KFENCE: memory corruption in pskb_expand_head, types: [UNKNOWN] # git bisect bad 42e0dcb66ed0ce9a489b76681244359cb3d98b21 Bisecting: 4 revisions left to test after this (roughly 2 steps) [52aa2296a968f2513c56f20e9f97b85771f2573c] mm/slub, kunit: Add testcase for krealloc redzone and zeroing testing commit 52aa2296a968f2513c56f20e9f97b85771f2573c gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2021c3d0c7855026ca589ec3871fc4868301262cc9b5f2bc95aed3c1aed627eb all runs: crashed: KFENCE: memory corruption in pskb_expand_head representative crash: KFENCE: memory corruption in pskb_expand_head, types: [UNKNOWN] # git bisect bad 52aa2296a968f2513c56f20e9f97b85771f2573c Bisecting: 2 revisions left to test after this (roughly 1 step) [b0c543648f3bd67ce1d845991a57f232bd248f09] mm/slub: Consider kfence case for get_orig_size() testing commit b0c543648f3bd67ce1d845991a57f232bd248f09 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 224f99cc752616c9c56c6f341dfdff15809a9a9f9a23b5ef218a05daa4940baf all runs: OK false negative chance: 0.000 # git bisect good b0c543648f3bd67ce1d845991a57f232bd248f09 Bisecting: 0 revisions left to test after this (roughly 1 step) [d0a38fad51cc70ab3dd3c59b54d8079ac19220b9] mm/slub: Improve redzone check and zeroing for krealloc() testing commit d0a38fad51cc70ab3dd3c59b54d8079ac19220b9 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: abc7a6c5f4bc2d42f392b3372d36b1b28416c3d9983012b89f6330106e507bf0 all runs: crashed: KFENCE: memory corruption in pskb_expand_head representative crash: KFENCE: memory corruption in pskb_expand_head, types: [UNKNOWN] # git bisect bad d0a38fad51cc70ab3dd3c59b54d8079ac19220b9 Bisecting: 0 revisions left to test after this (roughly 0 steps) [f97ac9f57ebbe7b89e256fbc3d8963587f4503aa] mm/slub: Move krealloc() and related code to slub.c testing commit f97ac9f57ebbe7b89e256fbc3d8963587f4503aa gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8700b4c8ff9ad94e2aa1b8cfd3beb6e377d428c83984e16730763873af51cc0f all runs: OK false negative chance: 0.000 # git bisect good f97ac9f57ebbe7b89e256fbc3d8963587f4503aa d0a38fad51cc70ab3dd3c59b54d8079ac19220b9 is the first bad commit commit d0a38fad51cc70ab3dd3c59b54d8079ac19220b9 Author: Feng Tang Date: Wed Sep 11 14:45:34 2024 +0800 mm/slub: Improve redzone check and zeroing for krealloc() For current krealloc(), one problem is its caller doesn't pass the old request size, say the object is 64 bytes kmalloc one, but caller may only requested 48 bytes. Then when krealloc() shrinks or grows in the same object, or allocate a new bigger object, it lacks this 'original size' information to do accurate data preserving or zeroing (when __GFP_ZERO is set). Thus with slub debug redzone and object tracking enabled, parts of the object after krealloc() might contain redzone data instead of zeroes, which is violating the __GFP_ZERO guarantees. Good thing is in this case, kmalloc caches do have this 'orig_size' feature. So solve the problem by utilize 'org_size' to do accurate data zeroing and preserving. Suggested-by: Vlastimil Babka Signed-off-by: Feng Tang Signed-off-by: Vlastimil Babka mm/slub.c | 54 ++++++++++++++++++++++++++++++++++++++---------------- 1 file changed, 38 insertions(+), 16 deletions(-) accumulated error probability: 0.00 culprit signature: abc7a6c5f4bc2d42f392b3372d36b1b28416c3d9983012b89f6330106e507bf0 parent signature: 8700b4c8ff9ad94e2aa1b8cfd3beb6e377d428c83984e16730763873af51cc0f revisions tested: 23, total time: 6h8m36.306733988s (build: 2h50m2.590418985s, test: 3h4m12.349073673s) first bad commit: d0a38fad51cc70ab3dd3c59b54d8079ac19220b9 mm/slub: Improve redzone check and zeroing for krealloc() recipients (to): ["akpm@linux-foundation.org" "cl@linux.com" "feng.tang@intel.com" "iamjoonsoo.kim@lge.com" "linux-mm@kvack.org" "penberg@kernel.org" "rientjes@google.com" "vbabka@suse.cz" "vbabka@suse.cz"] recipients (cc): ["42.hyeyoo@gmail.com" "linux-kernel@vger.kernel.org" "roman.gushchin@linux.dev"] crash: KFENCE: memory corruption in pskb_expand_head ================================================================== BUG: KFENCE: memory corruption in pskb_expand_head+0x11f/0x450 net/core/skbuff.c:2307 Corrupted memory at 0xffff888236fd0fc0 [ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 ] (in kfence-#231): pskb_expand_head+0x11f/0x450 net/core/skbuff.c:2307 __skb_cow include/linux/skbuff.h:3702 [inline] skb_cow_head include/linux/skbuff.h:3736 [inline] __vlan_insert_inner_tag include/linux/if_vlan.h:354 [inline] __vlan_insert_tag include/linux/if_vlan.h:400 [inline] skb_vlan_push+0x97/0x190 net/core/skbuff.c:6324 ____bpf_skb_vlan_push net/core/filter.c:3191 [inline] bpf_skb_vlan_push+0x7c/0x140 net/core/filter.c:3181 ___bpf_prog_run+0x5f6/0x2280 kernel/bpf/core.c:2010 __bpf_prog_run480+0xb4/0xe0 kernel/bpf/core.c:2253 bpf_dispatcher_nop_func include/linux/bpf.h:1257 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] bpf_test_run+0x284/0x400 net/bpf/test_run.c:433 bpf_prog_test_run_skb+0x3cd/0x590 net/bpf/test_run.c:1094 bpf_prog_test_run+0xdf/0x100 kernel/bpf/syscall.c:4247 __sys_bpf+0x2ff/0x5a0 kernel/bpf/syscall.c:5652 __do_sys_bpf kernel/bpf/syscall.c:5741 [inline] __se_sys_bpf kernel/bpf/syscall.c:5739 [inline] __x64_sys_bpf+0x17/0x20 kernel/bpf/syscall.c:5739 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x8d/0x190 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f kfence-#231: 0xffff888236fd0e00-0xffff888236fd0fbf, size=448, cache=kmalloc-512 allocated by task 5051 on cpu 0 at 63.517943s (0.103368s ago): kmalloc_noprof include/linux/slab.h:882 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] bpf_test_init+0x5b/0xc0 net/bpf/test_run.c:669 bpf_prog_test_run_skb+0xa2/0x590 net/bpf/test_run.c:1000 bpf_prog_test_run+0xdf/0x100 kernel/bpf/syscall.c:4247 __sys_bpf+0x2ff/0x5a0 kernel/bpf/syscall.c:5652 __do_sys_bpf kernel/bpf/syscall.c:5741 [inline] __se_sys_bpf kernel/bpf/syscall.c:5739 [inline] __x64_sys_bpf+0x17/0x20 kernel/bpf/syscall.c:5739 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x8d/0x190 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f freed by task 5051 on cpu 0 at 63.517967s (0.146647s ago): pskb_expand_head+0x11f/0x450 net/core/skbuff.c:2307 __skb_cow include/linux/skbuff.h:3702 [inline] skb_cow_head include/linux/skbuff.h:3736 [inline] __vlan_insert_inner_tag include/linux/if_vlan.h:354 [inline] __vlan_insert_tag include/linux/if_vlan.h:400 [inline] skb_vlan_push+0x97/0x190 net/core/skbuff.c:6324 ____bpf_skb_vlan_push net/core/filter.c:3191 [inline] bpf_skb_vlan_push+0x7c/0x140 net/core/filter.c:3181 ___bpf_prog_run+0x5f6/0x2280 kernel/bpf/core.c:2010 __bpf_prog_run480+0xb4/0xe0 kernel/bpf/core.c:2253 bpf_dispatcher_nop_func include/linux/bpf.h:1257 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] bpf_test_run+0x284/0x400 net/bpf/test_run.c:433 bpf_prog_test_run_skb+0x3cd/0x590 net/bpf/test_run.c:1094 bpf_prog_test_run+0xdf/0x100 kernel/bpf/syscall.c:4247 __sys_bpf+0x2ff/0x5a0 kernel/bpf/syscall.c:5652 __do_sys_bpf kernel/bpf/syscall.c:5741 [inline] __se_sys_bpf kernel/bpf/syscall.c:5739 [inline] __x64_sys_bpf+0x17/0x20 kernel/bpf/syscall.c:5739 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x8d/0x190 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 5051 Comm: syz.1.416 Not tainted 6.12.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ==================================================================