ci2 starts bisection 2025-12-19 17:06:53.321674314 +0000 UTC m=+2000225.498797381 bisecting fixing commit since 28c695c365e10b534e6d01d15a2186098ab815d1 building syzkaller on 3e1beec658de176f019d70b438efd52ea21b2cf4 ensuring issue is reproducible on original commit 28c695c365e10b534e6d01d15a2186098ab815d1 testing commit 28c695c365e10b534e6d01d15a2186098ab815d1 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 58f54946749544a1967cc9ede66d2463fb3a132f35f54c8d073f49aa4ec76876 run #0: crashed: INFO: rcu detected stall in futex run #1: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #2: crashed: INFO: rcu detected stall in futex run #3: crashed: INFO: rcu detected stall in futex run #4: crashed: INFO: rcu detected stall in addrconf_rs_timer run #5: crashed: INFO: rcu detected stall in futex run #6: crashed: INFO: rcu detected stall in addrconf_rs_timer run #7: crashed: INFO: rcu detected stall in addrconf_rs_timer run #8: crashed: INFO: rcu detected stall in futex run #9: crashed: INFO: rcu detected stall in corrupted run #10: crashed: INFO: rcu detected stall in addrconf_rs_timer run #11: crashed: INFO: rcu detected stall in corrupted run #12: crashed: INFO: rcu detected stall in __run_timers run #13: crashed: INFO: rcu detected stall in addrconf_rs_timer run #14: crashed: INFO: rcu detected stall in corrupted run #15: crashed: INFO: rcu detected stall in corrupted run #16: crashed: INFO: rcu detected stall in addrconf_rs_timer run #17: crashed: INFO: rcu detected stall in do_mas_munmap run #18: crashed: INFO: rcu detected stall in sys_unlink run #19: crashed: INFO: rcu detected stall in addrconf_rs_timer representative crash: INFO: rcu detected stall in futex, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed testing commit 28c695c365e10b534e6d01d15a2186098ab815d1 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f26fdeb94025902b77156775ee133741c70c71ee13567325c9e9429ee0efd838 all runs: OK false negative chance: 0.000 kconfig minimization: base=3829 full=7618 leaves diff=2130 split chunks (needed=false): <2130> split chunk #0 of len 2130 into 5 parts testing without sub-chunk 1/5 testing commit 28c695c365e10b534e6d01d15a2186098ab815d1 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5a940347ab0de4042ee4a579e178bc23d36c90abbe763569437949cacd0f1b6d run #0: crashed: INFO: rcu detected stall in addrconf_rs_timer run #1: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #2: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #3: crashed: INFO: rcu detected stall in addrconf_rs_timer run #4: crashed: INFO: rcu detected stall in addrconf_rs_timer run #5: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #6: crashed: INFO: rcu detected stall in addrconf_rs_timer run #7: crashed: INFO: rcu detected stall in addrconf_rs_timer run #8: crashed: INFO: rcu detected stall in addrconf_rs_timer run #9: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in addrconf_rs_timer, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 testing commit 28c695c365e10b534e6d01d15a2186098ab815d1 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2921b75e41244807a087c60c389463207c7a53d576656534d433729d8d259a53 run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in perf_fasync run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in mrp_join_timer run #6: crashed: INFO: rcu detected stall in addrconf_rs_timer run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in irqentry_exit run #9: crashed: INFO: rcu detected stall in addrconf_rs_timer representative crash: INFO: rcu detected stall in corrupted, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 testing commit 28c695c365e10b534e6d01d15a2186098ab815d1 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e50daa3f207f78334376c455c57a7e8b7700eebaa19fb5deaf6fd9b1c0689fe1 run #0: crashed: INFO: rcu detected stall in irqentry_exit run #1: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #2: crashed: INFO: rcu detected stall in addrconf_rs_timer run #3: crashed: INFO: rcu detected stall in addrconf_rs_timer run #4: crashed: INFO: rcu detected stall in addrconf_rs_timer run #5: crashed: INFO: rcu detected stall in futex run #6: OK run #7: OK run #8: OK run #9: OK representative crash: INFO: rcu detected stall in irqentry_exit, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 testing commit 28c695c365e10b534e6d01d15a2186098ab815d1 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b9b8a81a5307dd5778594c9a3db41927bd12e10028ebb7fa09680b7fd098f997 run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in addrconf_rs_timer run #2: crashed: INFO: rcu detected stall in futex run #3: crashed: INFO: rcu detected stall in addrconf_rs_timer run #4: crashed: INFO: rcu detected stall in futex run #5: crashed: INFO: rcu detected stall in futex run #6: crashed: INFO: rcu detected stall in addrconf_rs_timer run #7: OK run #8: OK run #9: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 testing commit 28c695c365e10b534e6d01d15a2186098ab815d1 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f62e045bd40178aa39a8dd1cb1a193b4be1848db5e9e49d0920f7a24a4e29e31 all runs: OK false negative chance: 0.000 minimized to 426 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DVB_CORE EXTCON FB GPIOLIB HID_ZEROPLUS I2C_MUX IIO 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 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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_U132_HCD 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 USER_RETURN_NOTIFIER 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_IOMMU_TYPE1 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_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_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_STK1160_COMMON 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_X2APIC XARRAY_MULTI 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 ZBUD ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZBUD] determining the merge base between 28c695c365e10b534e6d01d15a2186098ab815d1 and dd9b004b7ff3289fb7bae35130c0a5c0537266af 830b3c68c1fb1e9176028d02ef86f3cf76aa2476/Linux 6.1 is a merge base, check if it has the bug testing commit 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7586ee2fa50e23832ca71a5654fb551ba0e6f45ba2f6451c8e669f70f749cd20 run #0: crashed: INFO: rcu detected stall in futex run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #3: crashed: INFO: rcu detected stall in futex run #4: crashed: INFO: rcu detected stall in addrconf_rs_timer run #5: crashed: INFO: rcu detected stall in futex run #6: crashed: INFO: rcu detected stall in sys_futex run #7: crashed: INFO: rcu detected stall in addrconf_rs_timer run #8: crashed: INFO: rcu detected stall in futex run #9: crashed: INFO: rcu detected stall in addrconf_rs_timer representative crash: INFO: rcu detected stall in futex, types: [HANG] testing current HEAD dd9b004b7ff3289fb7bae35130c0a5c0537266af testing commit dd9b004b7ff3289fb7bae35130c0a5c0537266af gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c8e52a522f15163a4e471fe3775d7349633b887feb673bd5355feba66001d87a all runs: OK false negative chance: 0.000 # git bisect start dd9b004b7ff3289fb7bae35130c0a5c0537266af 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 Bisecting: 136803 revisions left to test after this (roughly 17 steps) [ff2632d7d08edc11e8bd0629e9fcfebab25c78b4] Merge tag 'powerpc-6.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit ff2632d7d08edc11e8bd0629e9fcfebab25c78b4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6eb541137056cb386fc8998a8b8705b1cfa0b6649a7d497cff09338de97cc205 all runs: boot failed: UBSAN: signed-integer-overflow in __cancel_work unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0 # git bisect skip ff2632d7d08edc11e8bd0629e9fcfebab25c78b4 Bisecting: 136704 revisions left to test after this (roughly 17 steps) [26aa834ff2eef00a863a64b1a94a5a88a94eb963] Merge tag 'trace-tools-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace determine whether the revision contains the guilty commit revision ff2632d7d08edc11e8bd0629e9fcfebab25c78b4 crashed and is reachable testing commit 26aa834ff2eef00a863a64b1a94a5a88a94eb963 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ec2f3dd3a074b9dee622caff5236f69a29b847d1c40c49e81277c5592e3b30c1 all runs: boot failed: UBSAN: signed-integer-overflow in __cancel_work unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0 # git bisect skip 26aa834ff2eef00a863a64b1a94a5a88a94eb963 Bisecting: 136704 revisions left to test after this (roughly 17 steps) [2dd00ac1d38afba1b59e439abc300a9b0ce696bf] eventfs: Do not use attributes for events directory determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit 2dd00ac1d38afba1b59e439abc300a9b0ce696bf gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 77b9eccc0b420e6cb6dc4111e5037f1a32c3dd31f3bbf9e9bcfbf0b459b30688 all runs: boot failed: UBSAN: signed-integer-overflow in __cancel_work unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0 # git bisect skip 2dd00ac1d38afba1b59e439abc300a9b0ce696bf Bisecting: 136704 revisions left to test after this (roughly 17 steps) [6e3d7c903c3e82d626f1bc32c790fc86a179d14c] eventfs: Cleanup permissions in creation of inodes determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit 6e3d7c903c3e82d626f1bc32c790fc86a179d14c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7bd23828cfb2a78f870c4888a747ebb1a0d4eeb6fec822d5274be3b7a11c191f all runs: boot failed: UBSAN: signed-integer-overflow in __cancel_work unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0 # git bisect skip 6e3d7c903c3e82d626f1bc32c790fc86a179d14c Bisecting: 136704 revisions left to test after this (roughly 17 steps) [37cd0d1266971942f5cda3e4ca1c6fb005635b14] eventfs: Remove getattr and permission callbacks determine whether the revision contains the guilty commit revision ff2632d7d08edc11e8bd0629e9fcfebab25c78b4 crashed and is reachable testing commit 37cd0d1266971942f5cda3e4ca1c6fb005635b14 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 037531de13d268112f1d028d1a9c777320056acd8ce882d08b53db34b55e6268 all runs: boot failed: UBSAN: signed-integer-overflow in __cancel_work unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0 # git bisect skip 37cd0d1266971942f5cda3e4ca1c6fb005635b14 Bisecting: 136704 revisions left to test after this (roughly 17 steps) [625acf9d5e56e10b92636003df7f5bddb21a7a34] eventfs: Consolidate the eventfs_inode update in eventfs_get_inode() determine whether the revision contains the guilty commit revision ff2632d7d08edc11e8bd0629e9fcfebab25c78b4 crashed and is reachable testing commit 625acf9d5e56e10b92636003df7f5bddb21a7a34 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 848c574032c93fd79688c69649df2a3361dcfe61ba74a90124314baacd25d517 all runs: boot failed: UBSAN: signed-integer-overflow in __cancel_work unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0 # git bisect skip 625acf9d5e56e10b92636003df7f5bddb21a7a34 Bisecting: 136704 revisions left to test after this (roughly 17 steps) [f5e5e97c719d289025afce07050effcf1f7373ef] inode: clarify what's locked determine whether the revision contains the guilty commit revision ff2632d7d08edc11e8bd0629e9fcfebab25c78b4 crashed and is reachable testing commit f5e5e97c719d289025afce07050effcf1f7373ef gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 580a3a457ae6d1352620cc79433861145dc12fda6fe5be1354fbe477805e1319 all runs: boot failed: UBSAN: signed-integer-overflow in __cancel_work unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0 # git bisect skip f5e5e97c719d289025afce07050effcf1f7373ef Bisecting: 136704 revisions left to test after this (roughly 17 steps) [439987f6f471c2d8c99e77d3aa75cda597796b9d] drm/xe: don't build debugfs files when CONFIG_DEBUG_FS=n determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit 439987f6f471c2d8c99e77d3aa75cda597796b9d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0db5b62c049ed5c172fe004785df2305b8bef3b76e64a6f4d269a86c62305bb4 all runs: OK false negative chance: 0.000 # git bisect bad 439987f6f471c2d8c99e77d3aa75cda597796b9d Bisecting: 54474 revisions left to test after this (roughly 16 steps) [1b722407a13b7f8658d2e26917791f32805980a2] Merge tag 'drm-next-2023-06-29' of git://anongit.freedesktop.org/drm/drm determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit 1b722407a13b7f8658d2e26917791f32805980a2 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f6827dd0c6a3d5b768007b542cc8a5cf46950a48e56dfa466662aaf6ab1b48a9 all runs: basic kernel testing failed: UBSAN: array-index-out-of-bounds in alloc_pid unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0 # git bisect skip 1b722407a13b7f8658d2e26917791f32805980a2 Bisecting: 54474 revisions left to test after this (roughly 16 steps) [5635ef0bd1052420bc659a00be6fd0c60cec5cb9] clk: qcom: ipq5332: drop the CLK_SET_RATE_PARENT flag from GPLL clocks determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit 5635ef0bd1052420bc659a00be6fd0c60cec5cb9 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b5879caf62972348d6b34129ddf184925d95ea90e0e8cfcc7aebdfe80abfd9a9 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 5635ef0bd1052420bc659a00be6fd0c60cec5cb9 Bisecting: 38242 revisions left to test after this (roughly 15 steps) [b68ee1c6131c540a62ecd443be89c406401df091] Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit b68ee1c6131c540a62ecd443be89c406401df091 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 60485dd24814c90680191adc6547d2199d7c378c611b3d0773d6c54de951e592 all runs: OK false negative chance: 0.000 # git bisect bad b68ee1c6131c540a62ecd443be89c406401df091 Bisecting: 19083 revisions left to test after this (roughly 14 steps) [8ca8d89b43caf9a02a18414d6eeff966d2b14512] Merge tag 'cgroup-for-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit 8ca8d89b43caf9a02a18414d6eeff966d2b14512 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 437540c11152050111c8273daeab5e1847b99ee79a14b1b8ef68558fd87cc510 run #0: crashed: INFO: rcu detected stall in addrconf_rs_timer run #1: crashed: INFO: rcu detected stall in futex run #2: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #3: crashed: INFO: rcu detected stall in addrconf_rs_timer run #4: crashed: INFO: rcu detected stall in addrconf_rs_timer run #5: crashed: INFO: rcu detected stall in futex run #6: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #7: crashed: INFO: rcu detected stall in futex run #8: crashed: INFO: rcu detected stall in addrconf_rs_timer run #9: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode representative crash: INFO: rcu detected stall in addrconf_rs_timer, types: [HANG] # git bisect good 8ca8d89b43caf9a02a18414d6eeff966d2b14512 Bisecting: 9554 revisions left to test after this (roughly 13 steps) [60e2bf7d10e9cd5641f4a5183a19058d9a2c8782] Merge tag 'input-for-v6.3-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit 60e2bf7d10e9cd5641f4a5183a19058d9a2c8782 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4eff190d97860f17221fe7ef5b133b8c191395952b1f2613c974bef96aec7260 run #0: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #1: crashed: INFO: rcu detected stall in futex run #2: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #3: crashed: INFO: rcu detected stall in addrconf_rs_timer run #4: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #5: crashed: INFO: rcu detected stall in wg_packet_send_staged_packets run #6: crashed: INFO: rcu detected stall in ioctl run #7: crashed: INFO: rcu detected stall in addrconf_rs_timer run #8: crashed: INFO: rcu detected stall in addrconf_rs_timer run #9: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in syscall_exit_to_user_mode, types: [HANG] # git bisect good 60e2bf7d10e9cd5641f4a5183a19058d9a2c8782 Bisecting: 4819 revisions left to test after this (roughly 12 steps) [672d2dae19012cb2c40fdf36711ee3b5f5420724] Merge tag 'soc-defconfig-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit 672d2dae19012cb2c40fdf36711ee3b5f5420724 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b69b0e1b3599b1beafe66fd780845e71d13290da816d6edefbc407959dff91fe all runs: OK false negative chance: 0.000 # git bisect bad 672d2dae19012cb2c40fdf36711ee3b5f5420724 Bisecting: 2367 revisions left to test after this (roughly 11 steps) [7e27cb6ad4d85fc8bac2a2a896da62ef66b8598e] cgroup/cpuset: Make cpuset_attach_task() skip subpartitions CPUs for top_cpuset determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit 7e27cb6ad4d85fc8bac2a2a896da62ef66b8598e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a7a1976427f8f96914e1c5a332199a9c922d8443fca66d169ae8f218c915f750 run #0: crashed: INFO: rcu detected stall in addrconf_rs_timer run #1: crashed: INFO: rcu detected stall in addrconf_rs_timer run #2: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: INFO: rcu detected stall in addrconf_rs_timer, types: [HANG] # git bisect good 7e27cb6ad4d85fc8bac2a2a896da62ef66b8598e Bisecting: 1186 revisions left to test after this (roughly 10 steps) [0bcc4025550403ae28d2984bddacafbca0a2f112] netfs: Fix netfs_extract_iter_to_sg() for ITER_UBUF/IOVEC determine whether the revision contains the guilty commit revision 8ca8d89b43caf9a02a18414d6eeff966d2b14512 crashed and is reachable testing commit 0bcc4025550403ae28d2984bddacafbca0a2f112 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 65460ef9d0bada977877f2b7dc0393bf5f03af1e365fca575a4c5628e752407a run #0: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #1: crashed: INFO: rcu detected stall in futex run #2: crashed: INFO: rcu detected stall in futex run #3: crashed: INFO: rcu detected stall in addrconf_rs_timer run #4: crashed: INFO: rcu detected stall in futex run #5: crashed: INFO: rcu detected stall in addrconf_rs_timer run #6: crashed: INFO: rcu detected stall in addrconf_rs_timer run #7: crashed: INFO: rcu detected stall in addrconf_rs_timer run #8: OK run #9: OK run #10: OK run #11: OK run #12: crashed: INFO: rcu detected stall in corrupted run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in syscall_exit_to_user_mode, types: [HANG] # git bisect good 0bcc4025550403ae28d2984bddacafbca0a2f112 Bisecting: 559 revisions left to test after this (roughly 9 steps) [5dfb75e842e0ef59fc7bf307e5c52eab215bdb4c] Merge tag 'rcu.6.4.april5.2023.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux determine whether the revision contains the guilty commit revision 60e2bf7d10e9cd5641f4a5183a19058d9a2c8782 crashed and is reachable testing commit 5dfb75e842e0ef59fc7bf307e5c52eab215bdb4c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1a3edf18d17d38b3a2d5ba76fc15f0879da82d342797007e4d488c6dac92fc89 run #0: crashed: INFO: rcu detected stall in tcp_keepalive_timer run #1: crashed: INFO: rcu detected stall in wg_packet_send_staged_packets run #2: crashed: INFO: rcu detected stall in addrconf_rs_timer run #3: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #4: crashed: INFO: rcu detected stall in addrconf_rs_timer run #5: crashed: INFO: rcu detected stall in futex run #6: crashed: INFO: rcu detected stall in addrconf_rs_timer run #7: crashed: INFO: rcu detected stall in addrconf_rs_timer run #8: crashed: INFO: rcu detected stall in addrconf_rs_timer run #9: crashed: INFO: rcu detected stall in corrupted run #10: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor4017134010" "root@10.128.0.142:./syz-executor4017134010"]: exit status 255 run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in tcp_keepalive_timer, types: [HANG] # git bisect good 5dfb75e842e0ef59fc7bf307e5c52eab215bdb4c Bisecting: 274 revisions left to test after this (roughly 8 steps) [e7989789c686e83f032acf2c4363c2c153876b96] Merge tag 'timers-core-2023-04-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip determine whether the revision contains the guilty commit revision 8ca8d89b43caf9a02a18414d6eeff966d2b14512 crashed and is reachable testing commit e7989789c686e83f032acf2c4363c2c153876b96 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 119c30bb5b50b2e946bb97e0080883168a1f4624f91a84c6d63433313ec087f8 all runs: OK false negative chance: 0.000 # git bisect bad e7989789c686e83f032acf2c4363c2c153876b96 Bisecting: 150 revisions left to test after this (roughly 7 steps) [97adb49f052e70455c3529509885f8aa3b40c370] Merge tag 'v6.4/vfs.open' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs determine whether the revision contains the guilty commit revision 8ca8d89b43caf9a02a18414d6eeff966d2b14512 crashed and is reachable testing commit 97adb49f052e70455c3529509885f8aa3b40c370 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 357b61d1259039fd3f7419ea0a4ea9fc22124091cd7391622651036273f21be2 run #0: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #1: crashed: INFO: rcu detected stall in addrconf_rs_timer run #2: crashed: INFO: rcu detected stall in futex run #3: crashed: INFO: rcu detected stall in addrconf_rs_timer run #4: crashed: INFO: rcu detected stall in perf_fasync run #5: crashed: INFO: rcu detected stall in addrconf_rs_timer run #6: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in syscall_exit_to_user_mode, types: [HANG] # git bisect good 97adb49f052e70455c3529509885f8aa3b40c370 Bisecting: 76 revisions left to test after this (roughly 6 steps) [e94ee641f9cef2502adfe5e0c264b271420c7ab5] Merge tag 'edac_updates_for_v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit e94ee641f9cef2502adfe5e0c264b271420c7ab5 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e8f36234368fe5af928cba1b70584533cf9a50eb56a63f5059f6b4506a397194 run #0: crashed: INFO: rcu detected stall in futex run #1: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #2: crashed: INFO: rcu detected stall in futex run #3: crashed: INFO: rcu detected stall in addrconf_rs_timer run #4: crashed: INFO: rcu detected stall in addrconf_rs_timer run #5: crashed: INFO: rcu detected stall in addrconf_rs_timer run #6: crashed: INFO: rcu detected stall in addrconf_rs_timer run #7: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #8: crashed: INFO: rcu detected stall in futex run #9: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #10: crashed: INFO: rcu detected stall in futex run #11: crashed: BUG: soft lockup in addrconf_rs_timer run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in futex, types: [HANG] # git bisect good e94ee641f9cef2502adfe5e0c264b271420c7ab5 Bisecting: 40 revisions left to test after this (roughly 5 steps) [15bbeec0fe9f1e910cb6a173005a02b6b4582f3c] Merge tag 'core-entry-2023-04-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip determine whether the revision contains the guilty commit revision 97adb49f052e70455c3529509885f8aa3b40c370 crashed and is reachable testing commit 15bbeec0fe9f1e910cb6a173005a02b6b4582f3c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0203c9f53bd0ddc934909b7c0203c337321ef8e7d89c5dbfca6e08b17998600f run #0: crashed: INFO: rcu detected stall in addrconf_rs_timer run #1: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #2: crashed: INFO: rcu detected stall in addrconf_rs_timer run #3: crashed: INFO: rcu detected stall in addrconf_rs_timer run #4: crashed: INFO: rcu detected stall in futex run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: INFO: rcu detected stall in addrconf_rs_timer run #7: crashed: INFO: rcu detected stall in futex run #8: crashed: INFO: rcu detected stall in futex run #9: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #10: crashed: INFO: rcu detected stall in addrconf_rs_timer run #11: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor1879872041" "root@10.128.0.242:./syz-executor1879872041"]: exit status 255 run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in addrconf_rs_timer, types: [HANG] # git bisect good 15bbeec0fe9f1e910cb6a173005a02b6b4582f3c Bisecting: 22 revisions left to test after this (roughly 4 steps) [275232c0b4064b85fd48532dff1a9b2764d67617] Merge branch irq/loongarch-fixes-6.4 into irq/irqchip-next determine whether the revision contains the guilty commit revision 8ca8d89b43caf9a02a18414d6eeff966d2b14512 crashed and is reachable testing commit 275232c0b4064b85fd48532dff1a9b2764d67617 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: faac845a4edb56399f5554cfe1aec6956ec71a8f0e5f4afc49f9b692c36032ab run #0: crashed: INFO: rcu detected stall in addrconf_rs_timer run #1: crashed: INFO: rcu detected stall in addrconf_rs_timer run #2: crashed: INFO: rcu detected stall in addrconf_rs_timer run #3: crashed: INFO: rcu detected stall in futex run #4: crashed: INFO: rcu detected stall in addrconf_rs_timer run #5: crashed: INFO: rcu detected stall in futex run #6: crashed: INFO: rcu detected stall in addrconf_rs_timer run #7: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #8: crashed: INFO: rcu detected stall in wg_packet_send_keepalive run #9: crashed: BUG: soft lockup in addrconf_rs_timer run #10: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in addrconf_rs_timer, types: [HANG] # git bisect good 275232c0b4064b85fd48532dff1a9b2764d67617 Bisecting: 10 revisions left to test after this (roughly 4 steps) [263dda24fff0957f6b0a9abde2809122f7f0fad8] selftests/proc: Assert clock_gettime(CLOCK_BOOTTIME) VS /proc/uptime monotonicity determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit 263dda24fff0957f6b0a9abde2809122f7f0fad8 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c8950abcaf81b90b06651e6c351ac70300f4bd2e8702697a32f5669f2912152d run #0: crashed: INFO: rcu detected stall in addrconf_rs_timer run #1: crashed: INFO: rcu detected stall in futex run #2: crashed: INFO: rcu detected stall in addrconf_rs_timer run #3: crashed: INFO: rcu detected stall in futex run #4: crashed: INFO: rcu detected stall in futex run #5: crashed: INFO: rcu detected stall in futex run #6: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #7: crashed: INFO: rcu detected stall in futex run #8: crashed: INFO: rcu detected stall in futex run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in addrconf_rs_timer, types: [HANG] # git bisect good 263dda24fff0957f6b0a9abde2809122f7f0fad8 Bisecting: 5 revisions left to test after this (roughly 3 steps) [2ff1b0839ddd514be4752c64c1c6facf91ff3a56] Merge branch irq/misc-6.4 into irq/irqchip-next determine whether the revision contains the guilty commit revision 275232c0b4064b85fd48532dff1a9b2764d67617 crashed and is reachable testing commit 2ff1b0839ddd514be4752c64c1c6facf91ff3a56 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: bfef3a3bb7c1ab3c2c9b119e338cf3d2fe57bed55ba6575a461b51722e76f011 run #0: crashed: INFO: rcu detected stall in addrconf_rs_timer run #1: crashed: INFO: rcu detected stall in addrconf_rs_timer run #2: crashed: INFO: rcu detected stall in addrconf_rs_timer run #3: crashed: INFO: rcu detected stall in futex run #4: crashed: INFO: rcu detected stall in addrconf_rs_timer run #5: crashed: INFO: rcu detected stall in futex run #6: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #7: crashed: INFO: rcu detected stall in futex run #8: crashed: INFO: rcu detected stall in addrconf_rs_timer run #9: OK run #10: crashed: INFO: rcu detected stall in addrconf_rs_timer run #11: OK run #12: OK run #13: OK run #14: OK run #15: crashed: INFO: rcu detected stall in addrconf_rs_timer run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in addrconf_rs_timer, types: [HANG] # git bisect good 2ff1b0839ddd514be4752c64c1c6facf91ff3a56 Bisecting: 2 revisions left to test after this (roughly 2 steps) [f37202aa6e5d6d39a48f744d962fd2bf3a8a452b] Merge tag 'irqchip-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/core determine whether the revision contains the guilty commit revision 2ff1b0839ddd514be4752c64c1c6facf91ff3a56 crashed and is reachable testing commit f37202aa6e5d6d39a48f744d962fd2bf3a8a452b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6e390105bfc0aad618b42a8c1178141f749bf2b79f50377e86293e6e07b29bfb all runs: OK false negative chance: 0.000 # git bisect bad f37202aa6e5d6d39a48f744d962fd2bf3a8a452b Bisecting: 0 revisions left to test after this (roughly 1 step) [803235982b8c086184d04798d9079d236f352f88] genirq: Update affinity of secondary threads determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit 803235982b8c086184d04798d9079d236f352f88 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ef0587b7055ae6f6c86a76607302019fcd8b996b51b34363a87b27cf0a036ff6 all runs: OK false negative chance: 0.000 # git bisect bad 803235982b8c086184d04798d9079d236f352f88 Bisecting: 0 revisions left to test after this (roughly 0 steps) [f4bf3ca2e5cba655824b6e0893a98dfb33ed24e5] softirq: Add trace points for tasklet entry/exit determine whether the revision contains the guilty commit revision 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 crashed and is reachable testing commit f4bf3ca2e5cba655824b6e0893a98dfb33ed24e5 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 72ce89277f75148db0b61860c192d77ec9d4ec9b7c58cd6070b84e6c9d53e296 all runs: OK false negative chance: 0.000 # git bisect bad f4bf3ca2e5cba655824b6e0893a98dfb33ed24e5 f4bf3ca2e5cba655824b6e0893a98dfb33ed24e5 is the first bad commit commit f4bf3ca2e5cba655824b6e0893a98dfb33ed24e5 Author: Lingutla Chandrasekhar Date: Fri Apr 7 23:05:26 2023 +0000 softirq: Add trace points for tasklet entry/exit Tasklets are supposed to finish their work quickly and should not block the current running process, but it is not guaranteed that they do so. Currently softirq_entry/exit can be used to analyse the total tasklets execution time, but that's not helpful to track individual tasklets execution time. That makes it hard to identify tasklet functions, which take more time than expected. Add tasklet_entry/exit trace point support to track individual tasklet execution. Trivial usage example: # echo 1 > /sys/kernel/debug/tracing/events/irq/tasklet_entry/enable # echo 1 > /sys/kernel/debug/tracing/events/irq/tasklet_exit/enable # cat /sys/kernel/debug/tracing/trace # tracer: nop # # entries-in-buffer/entries-written: 4/4 #P:4 # # _-----=> irqs-off/BH-disabled # / _----=> need-resched # | / _---=> hardirq/softirq # || / _--=> preempt-depth # ||| / _-=> migrate-disable # |||| / delay # TASK-PID CPU# ||||| TIMESTAMP FUNCTION # | | | ||||| | | -0 [003] ..s1. 314.011428: tasklet_entry: tasklet=0xffffa01ef8db2740 function=tcp_tasklet_func -0 [003] ..s1. 314.011432: tasklet_exit: tasklet=0xffffa01ef8db2740 function=tcp_tasklet_func -0 [003] ..s1. 314.017369: tasklet_entry: tasklet=0xffffa01ef8db2740 function=tcp_tasklet_func -0 [003] ..s1. 314.017371: tasklet_exit: tasklet=0xffffa01ef8db2740 function=tcp_tasklet_func Signed-off-by: Lingutla Chandrasekhar Signed-off-by: J. Avila Signed-off-by: John Stultz Signed-off-by: Thomas Gleixner Reviewed-by: Steven Rostedt (Google) Link: https://lore.kernel.org/r/20230407230526.1685443-1-jstultz@google.com [elavila: Port to android-mainline] [jstultz: Rebased to upstream, cut unused trace points, added comments for the tracepoints, reworded commit] include/trace/events/irq.h | 47 ++++++++++++++++++++++++++++++++++++++++++++++ kernel/softirq.c | 9 +++++++-- 2 files changed, 54 insertions(+), 2 deletions(-) accumulated error probability: 0.00 parent commit 7e364e56293bb98cae1b55fd835f5991c4e96e7d wasn't tested testing commit 7e364e56293bb98cae1b55fd835f5991c4e96e7d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 489c50fd3274a5bd7daaa04ed6b4e16ca554f6534dc012d3ae144c32648b56bc culprit signature: 72ce89277f75148db0b61860c192d77ec9d4ec9b7c58cd6070b84e6c9d53e296 parent signature: 489c50fd3274a5bd7daaa04ed6b4e16ca554f6534dc012d3ae144c32648b56bc reproducer is flaky (0.41 repro chance estimate) revisions tested: 36, total time: 12h17m24.911398835s (build: 4h6m59.309876372s, test: 7h28m34.996867595s) first good commit: f4bf3ca2e5cba655824b6e0893a98dfb33ed24e5 softirq: Add trace points for tasklet entry/exit recipients (to): ["clingutla@codeaurora.org" "elavila@google.com" "jstultz@google.com" "rostedt@goodmis.org" "tglx@linutronix.de"] recipients (cc): []