ci starts bisection 2025-09-08 11:50:44.031727713 +0000 UTC m=+375164.919300270 bisecting fixing commit since 079e5c56a5c41d285068939ff7b0041ab10386fa building syzkaller on ed351ea732d889c7798e7f0226bcaec65a8a6b52 ensuring issue is reproducible on original commit 079e5c56a5c41d285068939ff7b0041ab10386fa testing commit 079e5c56a5c41d285068939ff7b0041ab10386fa gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5959cb0386a4962e373f5b2b308fba6dad518a8b034d27d4b4f75728504663f6 all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [bug_or_warning kasan atomic_sleep hang memleak ubsan], they are not needed testing commit 079e5c56a5c41d285068939ff7b0041ab10386fa gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: cfffe1ef248d8ca39146a2e44343232b8b44a73bd1bf4428457fe1e6005ea03a all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] the bug reproduces without the instrumentation disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed kconfig minimization: base=4099 full=8333 leaves diff=2137 split chunks (needed=false): <2137> split chunk #0 of len 2137 into 5 parts testing without sub-chunk 1/5 disabling configs for [ubsan bug_or_warning kasan atomic_sleep hang memleak], they are not needed testing commit 079e5c56a5c41d285068939ff7b0041ab10386fa gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 198f9b5e284706ec047cf6464774638449b2ea2518f2ed47420aa840630e728d all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit 079e5c56a5c41d285068939ff7b0041ab10386fa gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5c1b1ca7e9dc45215eea4b2837327bc676efa951c95e6c42e5035c4690e7bfd5 all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [bug_or_warning kasan atomic_sleep hang memleak ubsan], they are not needed testing commit 079e5c56a5c41d285068939ff7b0041ab10386fa gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 50b4cf90edfee19689d98380bb280da9c03b0dad07ed16f08dd7661ea885b3e6 all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [ubsan bug_or_warning kasan atomic_sleep hang memleak], they are not needed testing commit 079e5c56a5c41d285068939ff7b0041ab10386fa gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f775c347491785c76537787a71cdbea822bf29e6138a9647b4754d9a0cbe01a9 all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [hang memleak ubsan bug_or_warning kasan atomic_sleep], they are not needed testing commit 079e5c56a5c41d285068939ff7b0041ab10386fa gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7e31978d6b99bf97ab273d200c8aae78d69bf19e9cbd0cd3b4b8984fb32ceea3 all runs: OK false negative chance: 0.000 minimized to 425 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 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 MFD_VIPERBOARD NOP_USB_XCEIV PARPORT PCCARD PCMCIA PHONET RADIO_ADAPTERS RADIO_SI470X RADIO_SI4713 RC_CORE RFKILL SND SOUND SPI SSB TAP TARGET_CORE TUN USB_AMD5536UDC USB_ATM 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USB_GSPCA_SPCA506 USB_GSPCA_SPCA508 USB_GSPCA_SPCA561 USB_GSPCA_SQ905 USB_GSPCA_SQ905C USB_GSPCA_SQ930X USB_GSPCA_STK014 USB_GSPCA_STK1135 USB_GSPCA_STV0680 USB_GSPCA_SUNPLUS USB_GSPCA_T613 USB_GSPCA_TOPRO USB_GSPCA_TOUPTEK USB_GSPCA_TV8532 USB_GSPCA_VC032X USB_GSPCA_VICAM USB_GSPCA_XIRLINK_CIT USB_GSPCA_ZC3XX USB_HACKRF USB_HCD_BCMA USB_HCD_SSB USB_HSIC_USB3503 USB_HSIC_USB4604 USB_HSO USB_HUB_USB251XB USB_IDMOUSE USB_IOWARRIOR USB_IPHETH USB_ISIGHTFW USB_ISP116X_HCD USB_ISP1301 USB_ISP1760 USB_ISP1760_DUAL_ROLE USB_ISP1760_HCD USB_ISP1761_UDC USB_KAWETH USB_KC2190 USB_KEENE USB_LAN78XX USB_LCD USB_LD USB_LEDS_TRIGGER_USBPORT USB_LED_TRIG USB_LEGOTOWER USB_LGM_PHY USB_LIBCOMPOSITE USB_LINK_LAYER_TEST USB_M5602 USB_MA901 USB_MAX3420_UDC USB_MAX3421_HCD USB_MDC800 USB_MICROTEK USB_MR800 USB_MSI2500 USB_MUSB_DUAL_ROLE USB_MUSB_HDRC USB_NET2280 USB_NET_AQC111 USB_NET_AX88179_178A USB_NET_AX8817X 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_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_PROC WIREGUARD WIRELESS WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_SILABS X86_DISABLED_FEATURE_LA57 X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK 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 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_ZSMALLOC] disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing current HEAD e12873ee856ffa6f104869b8ea10c0f741606f13 testing commit e12873ee856ffa6f104869b8ea10c0f741606f13 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7d1fd6b835b4849c97db39e8dd1a81c0c7de919d83fa866e9a9cdea7b2c077ee all runs: OK false negative chance: 0.000 # git bisect start e12873ee856ffa6f104869b8ea10c0f741606f13 079e5c56a5c41d285068939ff7b0041ab10386fa Bisecting: 14693 revisions left to test after this (roughly 14 steps) [119b1e61a769aa98e68599f44721661a4d8c55f3] Merge tag 'riscv-for-linus-6.16-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux determine whether the revision contains the guilty commit revision 079e5c56a5c41d285068939ff7b0041ab10386fa crashed and is reachable testing commit 119b1e61a769aa98e68599f44721661a4d8c55f3 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c72a1f96263e8d23b0e1fa0bcda8947cced461c5846f48a5c34ba898fff346ac all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] # git bisect good 119b1e61a769aa98e68599f44721661a4d8c55f3 Bisecting: 7989 revisions left to test after this (roughly 13 steps) [33503c083fda048c77903460ac0429e1e2c0e341] io_uring/memmap: cast nr_pages to size_t before shifting determine whether the revision contains the guilty commit revision 079e5c56a5c41d285068939ff7b0041ab10386fa crashed and is reachable testing commit 33503c083fda048c77903460ac0429e1e2c0e341 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2192b5680b5e53528fe63f8f17d4667ff11526bead97d1d09ba09472a4eda771 all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] # git bisect good 33503c083fda048c77903460ac0429e1e2c0e341 Bisecting: 3709 revisions left to test after this (roughly 12 steps) [260f6f4fda93c8485c8037865c941b42b9cba5d2] Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel determine whether the revision contains the guilty commit revision 079e5c56a5c41d285068939ff7b0041ab10386fa crashed and is reachable testing commit 260f6f4fda93c8485c8037865c941b42b9cba5d2 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8db311d4cd00eb8158fee3b62d53654ad0c6acf927c9cdbce9d53e3ab449fd52 all runs: OK false negative chance: 0.000 # git bisect bad 260f6f4fda93c8485c8037865c941b42b9cba5d2 Bisecting: 2110 revisions left to test after this (roughly 11 steps) [d9104cec3e8fe4b458b74709853231385779001f] Merge tag 'bpf-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next determine whether the revision contains the guilty commit revision 079e5c56a5c41d285068939ff7b0041ab10386fa crashed and is reachable testing commit d9104cec3e8fe4b458b74709853231385779001f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2e0d710ae2111936e91308c15bfba272a26d2a73e38c122cdf5bb9e878d28057 all runs: OK false negative chance: 0.000 # git bisect bad d9104cec3e8fe4b458b74709853231385779001f Bisecting: 1083 revisions left to test after this (roughly 10 steps) [e090f978054e1cfcd970234589168fcbcba33976] Merge branch 'net-dsa-rzn1_a5psw-add-compile_test' determine whether the revision contains the guilty commit revision 119b1e61a769aa98e68599f44721661a4d8c55f3 crashed and is reachable testing commit e090f978054e1cfcd970234589168fcbcba33976 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 98147829b3d1304bde803b416272d1d9af34b3f1a0d957bd1457c9f4d87743a9 all runs: OK false negative chance: 0.000 # git bisect bad e090f978054e1cfcd970234589168fcbcba33976 Bisecting: 529 revisions left to test after this (roughly 9 steps) [c73ebc0dbb6ed968cb58d04d82ede3b5fb95e8bf] Merge tag 'iwlwifi-next-2025-06-25' of https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-next determine whether the revision contains the guilty commit revision 079e5c56a5c41d285068939ff7b0041ab10386fa crashed and is reachable testing commit c73ebc0dbb6ed968cb58d04d82ede3b5fb95e8bf gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 87c652d7e259eceff657bd532f179683b4ac4130c03bb947b1c0aad30fcfe3a2 all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] # git bisect good c73ebc0dbb6ed968cb58d04d82ede3b5fb95e8bf Bisecting: 264 revisions left to test after this (roughly 8 steps) [fad9cf216597a71936ac87143d1618fbbcf97cbe] net: atlantic: add set_power to fw_ops for atl2 to fix wol determine whether the revision contains the guilty commit revision c73ebc0dbb6ed968cb58d04d82ede3b5fb95e8bf crashed and is reachable testing commit fad9cf216597a71936ac87143d1618fbbcf97cbe gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 44f0de91a7283290a90a7e360ca37ff24c15082807dfe6aae36a16a4e031a9bf all runs: OK false negative chance: 0.000 # git bisect bad fad9cf216597a71936ac87143d1618fbbcf97cbe Bisecting: 131 revisions left to test after this (roughly 7 steps) [a19e5812dc96e6ad3ba6740a22d0ae45b4c059d8] Merge branch 'there-are-some-cleanup-for-hns3-driver' determine whether the revision contains the guilty commit revision 119b1e61a769aa98e68599f44721661a4d8c55f3 crashed and is reachable testing commit a19e5812dc96e6ad3ba6740a22d0ae45b4c059d8 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 354e7ee44a47acc0c1a726e4bc901362083aba83739ee397ccb95613d1a90259 all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] # git bisect good a19e5812dc96e6ad3ba6740a22d0ae45b4c059d8 Bisecting: 65 revisions left to test after this (roughly 6 steps) [2bee162a28fb5f1b7ad1644071b26808fc14f493] dt-bindings: net/nfc: ti,trf7970a: Add ti,rx-gain-reduction-db option determine whether the revision contains the guilty commit revision 079e5c56a5c41d285068939ff7b0041ab10386fa crashed and is reachable testing commit 2bee162a28fb5f1b7ad1644071b26808fc14f493 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9a2e9f65c65f17addad81b9b4515b2136afc45b3ffd8aa736e99dfde02819497 run #0: ignore: 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 false negative chance: 0.000 # git bisect bad 2bee162a28fb5f1b7ad1644071b26808fc14f493 Bisecting: 32 revisions left to test after this (roughly 5 steps) [d53320aeef18ece4999c0cf07cb802d1dd990885] dt-bindings: net: Rename renesas,r9a09g057-gbeth.yaml determine whether the revision contains the guilty commit revision a19e5812dc96e6ad3ba6740a22d0ae45b4c059d8 crashed and is reachable testing commit d53320aeef18ece4999c0cf07cb802d1dd990885 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 194908fa1463a157594d27a5dfe3e0bf078e686543b7229e59b8265aefdcfafb all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] # git bisect good d53320aeef18ece4999c0cf07cb802d1dd990885 Bisecting: 16 revisions left to test after this (roughly 4 steps) [47aaa73d25ea58397d003cc5b4b95fdb730f853d] ptp: Split out PTP_ENABLE_PPS ioctl code determine whether the revision contains the guilty commit revision 119b1e61a769aa98e68599f44721661a4d8c55f3 crashed and is reachable testing commit 47aaa73d25ea58397d003cc5b4b95fdb730f853d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0a4e3383fe4984d88f3f7bf05879a6984d22af1bdedf63512f3934f4c1dfe31e all runs: OK false negative chance: 0.000 # git bisect bad 47aaa73d25ea58397d003cc5b4b95fdb730f853d Bisecting: 6 revisions left to test after this (roughly 3 steps) [32155c6fd9ec57e10a4d9bb15d52597f94664f7b] Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next determine whether the revision contains the guilty commit revision a19e5812dc96e6ad3ba6740a22d0ae45b4c059d8 crashed and is reachable testing commit 32155c6fd9ec57e10a4d9bb15d52597f94664f7b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4224cf72eefc1131bc3ae467dfba414f0b6b195aaece3b7438154751b77648c6 all runs: OK false negative chance: 0.000 # git bisect bad 32155c6fd9ec57e10a4d9bb15d52597f94664f7b Bisecting: 4 revisions left to test after this (roughly 2 steps) [7f12c33850482521c961c5c15a50ebe9b9a88d1e] net, bpf: Fix RCU usage in task_cls_state() for BPF programs determine whether the revision contains the guilty commit revision 079e5c56a5c41d285068939ff7b0041ab10386fa crashed and is reachable testing commit 7f12c33850482521c961c5c15a50ebe9b9a88d1e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4f064e77ef48de39657e09de1372f82ccb759052e191b507d8f81146f8a9a4f0 all runs: OK false negative chance: 0.000 # git bisect bad 7f12c33850482521c961c5c15a50ebe9b9a88d1e Bisecting: 1 revision left to test after this (roughly 1 step) [178f6a5c8cb3b6be1602de0964cd440243f493c9] bpf, ktls: Fix data corruption when using bpf_msg_pop_data() in ktls determine whether the revision contains the guilty commit revision 079e5c56a5c41d285068939ff7b0041ab10386fa crashed and is reachable testing commit 178f6a5c8cb3b6be1602de0964cd440243f493c9 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c4a630e6effffc7c285e189ae5cdea77f43f48669c5c0d63500b52ab98762f17 all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] # git bisect good 178f6a5c8cb3b6be1602de0964cd440243f493c9 Bisecting: 0 revisions left to test after this (roughly 0 steps) [f1c025773f257b534f6fa77dca29b0967dfed459] selftests/bpf: Add test to cover ktls with bpf_msg_pop_data determine whether the revision contains the guilty commit revision 079e5c56a5c41d285068939ff7b0041ab10386fa crashed and is reachable testing commit f1c025773f257b534f6fa77dca29b0967dfed459 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 12fdba6ef610c492358f230d31444f89ec66c16b7b745bd820c91915474a3e25 all runs: crashed: WARNING: suspicious RCU usage in task_cls_state representative crash: WARNING: suspicious RCU usage in task_cls_state, types: [LOCKDEP] # git bisect good f1c025773f257b534f6fa77dca29b0967dfed459 7f12c33850482521c961c5c15a50ebe9b9a88d1e is the first bad commit commit 7f12c33850482521c961c5c15a50ebe9b9a88d1e Author: Charalampos Mitrodimas Date: Wed Jun 11 17:20:43 2025 +0000 net, bpf: Fix RCU usage in task_cls_state() for BPF programs The commit ee971630f20f ("bpf: Allow some trace helpers for all prog types") made bpf_get_cgroup_classid_curr helper available to all BPF program types, not just networking programs. This helper calls __task_get_classid() which internally calls task_cls_state() requiring rcu_read_lock_bh_held(). This works in networking/tc context where RCU BH is held, but triggers an RCU warning when called from other contexts like BPF syscall programs that run under rcu_read_lock_trace(): WARNING: suspicious RCU usage 6.15.0-rc4-syzkaller-g079e5c56a5c4 #0 Not tainted ----------------------------- net/core/netclassid_cgroup.c:24 suspicious rcu_dereference_check() usage! Fix this by also accepting rcu_read_lock_held() and rcu_read_lock_trace_held() as valid RCU contexts in the task_cls_state() function. This ensures the helper works correctly in all needed RCU contexts where it might be called, regular RCU, RCU BH (for networking), and RCU trace (for BPF syscall programs). Fixes: ee971630f20f ("bpf: Allow some trace helpers for all prog types") Reported-by: syzbot+b4169a1cfb945d2ed0ec@syzkaller.appspotmail.com Signed-off-by: Charalampos Mitrodimas Signed-off-by: Daniel Borkmann Acked-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20250611-rcu-fix-task_cls_state-v3-1-3d30e1de753f@posteo.net Closes: https://syzkaller.appspot.com/bug?extid=b4169a1cfb945d2ed0ec net/core/netclassid_cgroup.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) accumulated error probability: 0.00 culprit signature: 4f064e77ef48de39657e09de1372f82ccb759052e191b507d8f81146f8a9a4f0 parent signature: 12fdba6ef610c492358f230d31444f89ec66c16b7b745bd820c91915474a3e25 revisions tested: 23, total time: 8h20m30.648547564s (build: 5h12m55.590267227s, test: 2h16m48.198262676s) first good commit: 7f12c33850482521c961c5c15a50ebe9b9a88d1e net, bpf: Fix RCU usage in task_cls_state() for BPF programs recipients (to): ["charmitro@posteo.net" "daniel@iogearbox.net" "davem@davemloft.net" "edumazet@google.com" "kuba@kernel.org" "netdev@vger.kernel.org" "pabeni@redhat.com"] recipients (cc): ["bpf@vger.kernel.org" "charmitro@posteo.net" "daniel@iogearbox.net" "horms@kernel.org" "linux-kernel@vger.kernel.org"]