ci starts bisection 2024-12-13 22:26:32.176102107 +0000 UTC m=+14957.575800554 bisecting fixing commit since 6897cea7183762b4bc97b0ed1b75274ece9d518b building syzkaller on 60bf9982e3c5f47dee643bd88d86c7f0b631e32d ensuring issue is reproducible on original commit 6897cea7183762b4bc97b0ed1b75274ece9d518b testing commit 6897cea7183762b4bc97b0ed1b75274ece9d518b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 28e6339670f8b5c9a5798636b218031fcae319557c3df11f3d7177a8d6a87bbd all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed testing commit 6897cea7183762b4bc97b0ed1b75274ece9d518b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e5fa24116df9b3603fe3df78703785ae7373a635f94977521bc525c7923f4edf all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] the bug reproduces without the instrumentation disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed kconfig minimization: base=4046 full=7960 leaves diff=2011 split chunks (needed=false): <2011> split chunk #0 of len 2011 into 5 parts testing without sub-chunk 1/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 6897cea7183762b4bc97b0ed1b75274ece9d518b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 630909e41bfaf1c8bc030d147fb7b98fce43798aa2eab4b12733590b7b9e3c95 all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 6897cea7183762b4bc97b0ed1b75274ece9d518b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f3abb84c42a6de1762955b3798351e74ea0a5347d24275318db31380c350a65e all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed testing commit 6897cea7183762b4bc97b0ed1b75274ece9d518b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1e02313af39f3901a3b8db6314c650a78a63eb9a9efccaf4b9a31acd39bd3a11 all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 6897cea7183762b4bc97b0ed1b75274ece9d518b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d8c9f34b780c3d839c1e3b37ce92112390bdb47d0a5b9c42b7c9248f3f9b32eb all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 6897cea7183762b4bc97b0ed1b75274ece9d518b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6fdb5d0ec9702c330713b801d1613af4415136bb825cf07d1e6f5ab06e06a40d all runs: OK false negative chance: 0.000 minimized to 802 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ARCH_HAS_UBSAN_SANITIZE_ALL ATM AX25 BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_ZSTD DAX DLM DVB_CORE ENCRYPTED_KEYS EXTCON FB GENEVE GPIOLIB HAMRADIO HAVE_CLK HAVE_KVM 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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_REALTEK 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_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 VDPA_USER 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 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_CMDLINE 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_NOMODESET 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 VXLAN WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_PURELIFI 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 XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZONE_DEVICE ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZSMALLOC] disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed testing current HEAD 243f750a2df0662bc45119f9dd5d7da031a17f36 testing commit 243f750a2df0662bc45119f9dd5d7da031a17f36 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 613e025ade826f28c4c74a306890cfc1d1cefdeda44ed052dbe45f3cdc9f5338 all runs: OK false negative chance: 0.000 # git bisect start 243f750a2df0662bc45119f9dd5d7da031a17f36 6897cea7183762b4bc97b0ed1b75274ece9d518b Bisecting: 37329 revisions left to test after this (roughly 15 steps) [fea17683c4fbb06a727cd94abf4c9588a580ab12] Merge tag 'leds-next-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds determine whether the revision contains the guilty commit revision 6897cea7183762b4bc97b0ed1b75274ece9d518b crashed and is reachable testing commit fea17683c4fbb06a727cd94abf4c9588a580ab12 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 52ca1de4b935e1519b5118b49d70bc3df1cce780b5c3307ed515060ebd8bba2e all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] # git bisect good fea17683c4fbb06a727cd94abf4c9588a580ab12 Bisecting: 18568 revisions left to test after this (roughly 14 steps) [891e8abed532423d3b918b0c445dc8919bc445b5] Merge tag 'perf-tools-for-v6.12-1-2024-09-19' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools determine whether the revision contains the guilty commit revision fea17683c4fbb06a727cd94abf4c9588a580ab12 crashed and is reachable testing commit 891e8abed532423d3b918b0c445dc8919bc445b5 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 81dee6f9a6abccf5c94a75b9ad5d4eeb2a5ea57ea5863874fcb1532f0a6ece75 all runs: OK false negative chance: 0.000 # git bisect bad 891e8abed532423d3b918b0c445dc8919bc445b5 Bisecting: 9388 revisions left to test after this (roughly 13 steps) [b34a6e73faf68e4987f7a2037af4be1e89b91b17] Merge branch 'phy-listing-and-topology-tracking' determine whether the revision contains the guilty commit revision 6897cea7183762b4bc97b0ed1b75274ece9d518b crashed and is reachable testing commit b34a6e73faf68e4987f7a2037af4be1e89b91b17 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3e2740c764bf8ccb5e82a4c2d0f177f66bd887e39d224d2da7619bfbbfb0134e all runs: OK false negative chance: 0.000 # git bisect bad b34a6e73faf68e4987f7a2037af4be1e89b91b17 Bisecting: 4683 revisions left to test after this (roughly 12 steps) [04d17331ca33744e1426fdeee7ba5e975c4b2239] Merge tag 'usb-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb determine whether the revision contains the guilty commit revision 6897cea7183762b4bc97b0ed1b75274ece9d518b crashed and is reachable testing commit 04d17331ca33744e1426fdeee7ba5e975c4b2239 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 091cc8a01908a1115d76465eb5318fd951742eb39b315ef21e739f79379bcaa7 all runs: OK false negative chance: 0.000 # git bisect bad 04d17331ca33744e1426fdeee7ba5e975c4b2239 Bisecting: 2344 revisions left to test after this (roughly 11 steps) [bfc109361cfc7b3251ed3b7993156825fa895a0d] Merge tag 'drm-intel-gt-next-2024-07-04' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-next determine whether the revision contains the guilty commit revision 6897cea7183762b4bc97b0ed1b75274ece9d518b crashed and is reachable testing commit bfc109361cfc7b3251ed3b7993156825fa895a0d gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d0370e3579fe5d9b7ed028a5959183650cb5101670ff6759d1a21972969987dc all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] # git bisect good bfc109361cfc7b3251ed3b7993156825fa895a0d Bisecting: 1168 revisions left to test after this (roughly 10 steps) [720261cfc7329406a50c2a8536e0039b9dd9a4e5] Merge tag 'bcachefs-2024-07-18.2' of https://evilpiepirate.org/git/bcachefs determine whether the revision contains the guilty commit revision fea17683c4fbb06a727cd94abf4c9588a580ab12 crashed and is reachable testing commit 720261cfc7329406a50c2a8536e0039b9dd9a4e5 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1f6953567c6feb91ecfb8492078bb048db75fd901d6d4ad27c38b3934eeb35e1 all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] # git bisect good 720261cfc7329406a50c2a8536e0039b9dd9a4e5 Bisecting: 566 revisions left to test after this (roughly 9 steps) [a4f9285520584977127946a22eab2adfbc87d1bf] Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux determine whether the revision contains the guilty commit revision bfc109361cfc7b3251ed3b7993156825fa895a0d crashed and is reachable testing commit a4f9285520584977127946a22eab2adfbc87d1bf gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c06223beaa94e80ff64924d296a9b593dddffa90274f1651ff60009d5ec19f19 all runs: OK false negative chance: 0.000 # git bisect bad a4f9285520584977127946a22eab2adfbc87d1bf Bisecting: 296 revisions left to test after this (roughly 8 steps) [661fb4e68cf62bf52eacfcd9b3b0d93fe4260c5b] Merge tag 'for-6.11/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm determine whether the revision contains the guilty commit revision bfc109361cfc7b3251ed3b7993156825fa895a0d crashed and is reachable testing commit 661fb4e68cf62bf52eacfcd9b3b0d93fe4260c5b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 014e620fdbaf47fb95f9cb44a5d9f3dd0328496ab497f05d245d4e34c443f5b2 all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] # git bisect good 661fb4e68cf62bf52eacfcd9b3b0d93fe4260c5b Bisecting: 142 revisions left to test after this (roughly 7 steps) [589eb11498fbf7de7a1bc8ff1f4b7592687dfd46] Merge branches 'clk-qcom', 'clk-rockchip', 'clk-sophgo' and 'clk-thead' into clk-next determine whether the revision contains the guilty commit revision 6897cea7183762b4bc97b0ed1b75274ece9d518b crashed and is reachable testing commit 589eb11498fbf7de7a1bc8ff1f4b7592687dfd46 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b0a60a674433cb75fb7ffbb370cf66537da891554244eab2e22dc402f3c3a7f5 all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] # git bisect good 589eb11498fbf7de7a1bc8ff1f4b7592687dfd46 Bisecting: 65 revisions left to test after this (roughly 6 steps) [22b8d89b9d8d84dcf161e583715e9501fd026ec1] Merge patch series "qla2xxx misc. bug fixes" determine whether the revision contains the guilty commit revision 6897cea7183762b4bc97b0ed1b75274ece9d518b crashed and is reachable testing commit 22b8d89b9d8d84dcf161e583715e9501fd026ec1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4245a6810a850257ecb8485d8fdc2c9e42093eca8caec0c315132515d5b76291 all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] # git bisect good 22b8d89b9d8d84dcf161e583715e9501fd026ec1 Bisecting: 32 revisions left to test after this (roughly 5 steps) [3b3adb3bbfce275400b21f7a0d54db0ba0a46cc9] vdpa/mlx5: Use suspend/resume during VQP change determine whether the revision contains the guilty commit revision 6897cea7183762b4bc97b0ed1b75274ece9d518b crashed and is reachable testing commit 3b3adb3bbfce275400b21f7a0d54db0ba0a46cc9 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b7413e75c49b15a917f9880774c5de41cb53b736350f68ae1b9112645017093f all runs: OK false negative chance: 0.000 # git bisect bad 3b3adb3bbfce275400b21f7a0d54db0ba0a46cc9 Bisecting: 16 revisions left to test after this (roughly 4 steps) [4c90a60ac2e09bcf615f7276d2fd1b2ba96bdce0] vdpa/mlx5: Drop redundant code determine whether the revision contains the guilty commit revision 6897cea7183762b4bc97b0ed1b75274ece9d518b crashed and is reachable testing commit 4c90a60ac2e09bcf615f7276d2fd1b2ba96bdce0 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 95bb27f53ad21a95ca5d15012bcb8a84813822559eb17834874e296f93c54b31 all runs: OK false negative chance: 0.000 # git bisect bad 4c90a60ac2e09bcf615f7276d2fd1b2ba96bdce0 Bisecting: 7 revisions left to test after this (roughly 3 steps) [9be237df09ce0c58b09fa979452bfe3f217e41ce] MAINTAINERS: Change lingshan's email to kernel.org determine whether the revision contains the guilty commit revision 6897cea7183762b4bc97b0ed1b75274ece9d518b crashed and is reachable testing commit 9be237df09ce0c58b09fa979452bfe3f217e41ce gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: dc35d7736931f9d5787cb4550382aa49dc2cf72bd03989310c2ca9273219c0d0 all runs: OK false negative chance: 0.000 # git bisect bad 9be237df09ce0c58b09fa979452bfe3f217e41ce Bisecting: 3 revisions left to test after this (roughly 2 steps) [e269d79c7d35aa3808b1f3c1737d63dab504ddc8] net: missing check virtio determine whether the revision contains the guilty commit revision 6897cea7183762b4bc97b0ed1b75274ece9d518b crashed and is reachable testing commit e269d79c7d35aa3808b1f3c1737d63dab504ddc8 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a1b89bd1e9bdd701d45aa849947f31c113817e378bb829827219039621b13a3b all runs: OK false negative chance: 0.000 # git bisect bad e269d79c7d35aa3808b1f3c1737d63dab504ddc8 Bisecting: 1 revision left to test after this (roughly 1 step) [840b2d39a2dc1b96deb3f5c7fef76c9b24f08f51] virtio_ring: fix KMSAN error for premapped mode determine whether the revision contains the guilty commit revision 6897cea7183762b4bc97b0ed1b75274ece9d518b crashed and is reachable testing commit 840b2d39a2dc1b96deb3f5c7fef76c9b24f08f51 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4e2216d66d713b401a043721e47dc0a5d2383e5c4791af1aa8a40a34d2c4423f all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] # git bisect good 840b2d39a2dc1b96deb3f5c7fef76c9b24f08f51 Bisecting: 0 revisions left to test after this (roughly 0 steps) [ede9c33ec568eed53f8f6bb42ed1d04af712cf02] tools/virtio: creating pipe assertion in vringh_test determine whether the revision contains the guilty commit revision 6897cea7183762b4bc97b0ed1b75274ece9d518b crashed and is reachable testing commit ede9c33ec568eed53f8f6bb42ed1d04af712cf02 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e97ae2c6b14cd86f6eea06c624f1342228bf8bae6e1510138c3869690946188b all runs: crashed: WARNING in skb_checksum_help representative crash: WARNING in skb_checksum_help, types: [WARNING] # git bisect good ede9c33ec568eed53f8f6bb42ed1d04af712cf02 e269d79c7d35aa3808b1f3c1737d63dab504ddc8 is the first bad commit commit e269d79c7d35aa3808b1f3c1737d63dab504ddc8 Author: Denis Arefev Date: Thu Jun 13 12:54:48 2024 +0300 net: missing check virtio Two missing check in virtio_net_hdr_to_skb() allowed syzbot to crash kernels again 1. After the skb_segment function the buffer may become non-linear (nr_frags != 0), but since the SKBTX_SHARED_FRAG flag is not set anywhere the __skb_linearize function will not be executed, then the buffer will remain non-linear. Then the condition (offset >= skb_headlen(skb)) becomes true, which causes WARN_ON_ONCE in skb_checksum_help. 2. The struct sk_buff and struct virtio_net_hdr members must be mathematically related. (gso_size) must be greater than (needed) otherwise WARN_ON_ONCE. (remainder) must be greater than (needed) otherwise WARN_ON_ONCE. (remainder) may be 0 if division is without remainder. offset+2 (4191) > skb_headlen() (1116) WARNING: CPU: 1 PID: 5084 at net/core/dev.c:3303 skb_checksum_help+0x5e2/0x740 net/core/dev.c:3303 Modules linked in: CPU: 1 PID: 5084 Comm: syz-executor336 Not tainted 6.7.0-rc3-syzkaller-00014-gdf60cee26a2e #0 Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 RIP: 0010:skb_checksum_help+0x5e2/0x740 net/core/dev.c:3303 Code: 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 52 01 00 00 44 89 e2 2b 53 74 4c 89 ee 48 c7 c7 40 57 e9 8b e8 af 8f dd f8 90 <0f> 0b 90 90 e9 87 fe ff ff e8 40 0f 6e f9 e9 4b fa ff ff 48 89 ef RSP: 0018:ffffc90003a9f338 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff888025125780 RCX: ffffffff814db209 RDX: ffff888015393b80 RSI: ffffffff814db216 RDI: 0000000000000001 RBP: ffff8880251257f4 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 000000000000045c R13: 000000000000105f R14: ffff8880251257f0 R15: 000000000000105d FS: 0000555555c24380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002000f000 CR3: 0000000023151000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ip_do_fragment+0xa1b/0x18b0 net/ipv4/ip_output.c:777 ip_fragment.constprop.0+0x161/0x230 net/ipv4/ip_output.c:584 ip_finish_output_gso net/ipv4/ip_output.c:286 [inline] __ip_finish_output net/ipv4/ip_output.c:308 [inline] __ip_finish_output+0x49c/0x650 net/ipv4/ip_output.c:295 ip_finish_output+0x31/0x310 net/ipv4/ip_output.c:323 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip_output+0x13b/0x2a0 net/ipv4/ip_output.c:433 dst_output include/net/dst.h:451 [inline] ip_local_out+0xaf/0x1a0 net/ipv4/ip_output.c:129 iptunnel_xmit+0x5b4/0x9b0 net/ipv4/ip_tunnel_core.c:82 ipip6_tunnel_xmit net/ipv6/sit.c:1034 [inline] sit_tunnel_xmit+0xed2/0x28f0 net/ipv6/sit.c:1076 __netdev_start_xmit include/linux/netdevice.h:4940 [inline] netdev_start_xmit include/linux/netdevice.h:4954 [inline] xmit_one net/core/dev.c:3545 [inline] dev_hard_start_xmit+0x13d/0x6d0 net/core/dev.c:3561 __dev_queue_xmit+0x7c1/0x3d60 net/core/dev.c:4346 dev_queue_xmit include/linux/netdevice.h:3134 [inline] packet_xmit+0x257/0x380 net/packet/af_packet.c:276 packet_snd net/packet/af_packet.c:3087 [inline] packet_sendmsg+0x24ca/0x5240 net/packet/af_packet.c:3119 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 __sys_sendto+0x255/0x340 net/socket.c:2190 __do_sys_sendto net/socket.c:2202 [inline] __se_sys_sendto net/socket.c:2198 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b Found by Linux Verification Center (linuxtesting.org) with Syzkaller Fixes: 0f6925b3e8da ("virtio_net: Do not pull payload in skb->head") Signed-off-by: Denis Arefev Message-Id: <20240613095448.27118-1-arefev@swemel.ru> Signed-off-by: Michael S. Tsirkin include/linux/virtio_net.h | 11 +++++++++++ 1 file changed, 11 insertions(+) accumulated error probability: 0.00 culprit signature: a1b89bd1e9bdd701d45aa849947f31c113817e378bb829827219039621b13a3b parent signature: e97ae2c6b14cd86f6eea06c624f1342228bf8bae6e1510138c3869690946188b revisions tested: 24, total time: 4h54m58.648337449s (build: 2h10m49.480708173s, test: 2h27m51.351869659s) first good commit: e269d79c7d35aa3808b1f3c1737d63dab504ddc8 net: missing check virtio recipients (to): ["arefev@swemel.ru" "jasowang@redhat.com" "mst@redhat.com" "mst@redhat.com" "virtualization@lists.linux.dev"] recipients (cc): ["eperezma@redhat.com" "linux-kernel@vger.kernel.org" "xuanzhuo@linux.alibaba.com"]