ci starts bisection 2025-10-08 15:43:22.577946079 +0000 UTC m=+60380.994509375 bisecting fixing commit since 0227b49b50276657243e54f5609e65c4f0eaaf4d building syzkaller on 32a0e5edfeef60e894c453dc9e9ae45528626ef1 ensuring issue is reproducible on original commit 0227b49b50276657243e54f5609e65c4f0eaaf4d testing commit 0227b49b50276657243e54f5609e65c4f0eaaf4d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c31e9c1f01957b1bc13b8ba2b091967d613bdd53611663760dac7bfb590d65c4 all runs: crashed: WARNING in try_to_migrate_one representative crash: WARNING in try_to_migrate_one, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit 0227b49b50276657243e54f5609e65c4f0eaaf4d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a020b229054ac289226b1cd63a3c63fcbf4d6ff2dc3cab42dd53488b34421012 run #0: crashed: WARNING in try_to_migrate_one run #1: crashed: WARNING in try_to_migrate_one run #2: crashed: WARNING in try_to_migrate_one run #3: crashed: WARNING in try_to_migrate_one run #4: crashed: WARNING in try_to_migrate_one run #5: crashed: WARNING in try_to_migrate_one run #6: crashed: WARNING in try_to_migrate_one run #7: crashed: WARNING in try_to_migrate_one run #8: infra problem: failed to create instance: googleapi: Error 503: Internal error. Please try again or contact Google Support. (Code: '640A8204AE94F.6B5BA15.31047812'), backendError run #9: crashed: WARNING in try_to_migrate_one representative crash: WARNING in try_to_migrate_one, types: [WARNING] the bug reproduces without the instrumentation disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed kconfig minimization: base=4115 full=8509 leaves diff=2193 split chunks (needed=false): <2193> split chunk #0 of len 2193 into 5 parts testing without sub-chunk 1/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 0227b49b50276657243e54f5609e65c4f0eaaf4d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: bbb31bc2999a12010a125e92f83c709c28db138dde4b086cbbae0925b155af37 all runs: crashed: WARNING in try_to_migrate_one representative crash: WARNING in try_to_migrate_one, types: [WARNING] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ubsan kasan locking atomic_sleep hang memleak], they are not needed testing commit 0227b49b50276657243e54f5609e65c4f0eaaf4d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5400fae0d65615ce0075779b3208740ab8524b904d1a5eb0ea2fabf843b0ee7b all runs: crashed: WARNING in try_to_migrate_one representative crash: WARNING in try_to_migrate_one, types: [WARNING] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 0227b49b50276657243e54f5609e65c4f0eaaf4d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d88d4e407a688ab6c11b3fc9b0a83bc022f503a008535a44e03beacc0fbb1c23 all runs: crashed: WARNING in try_to_migrate_one representative crash: WARNING in try_to_migrate_one, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 0227b49b50276657243e54f5609e65c4f0eaaf4d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2d00afb8c18698ef61db49e069f7f166d5120d5cb880d20bdf04fc9ab18d4538 all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [ubsan kasan locking atomic_sleep hang memleak], they are not needed testing commit 0227b49b50276657243e54f5609e65c4f0eaaf4d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 32860ec357762081a67f35bd9486b53bad6cd504d95442d17abf74eab170bf76 all runs: OK false negative chance: 0.000 minimized to 876 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 BCMA BLK_DEV_ZONED BPF_SYSCALL BT BT_BREDR BT_HIDP BXT_WC_PMIC_OPREGION CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC DAX DLM DRM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_NINTENDO HID_NVIDIA_SHIELD HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS HID_STEAM HID_THRUSTMASTER HID_ZEROPLUS I2C_MUX IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN INTEL_SCU_IPC INTEL_SOC_PMIC_BXTWC IOMMUFD IP_SCTP IRQ_REMAP KVM KVM_INTEL L2TP LEDS_CLASS_MULTICOLOR LIBNVDIMM MAC80211 MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_COMMON_OPTIONS MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_MT6370 MFD_RETU MFD_VIPERBOARD MMC MTD MTD_UBI NETFILTER_ADVANCED NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_CONNTRACK_SNMP NF_NAT_REDIRECT 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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_PCI_RENESAS USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USER_RETURN_NOTIFIER UVC_COMMON U_SERIAL_CONSOLE V4L2_ASYNC V4L2_FWNODE 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_CAMERA_LENS 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 VXLAN WANT_DEV_COREDUMP WEXT_CORE WEXT_PROC WIREGUARD WIRELESS WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_PURELIFI WLAN_VENDOR_SILABS X86_64_SMP 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 ZONE_DEVICE 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 [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing current HEAD 0d97f2067c166eb495771fede9f7b73999c67f66 testing commit 0d97f2067c166eb495771fede9f7b73999c67f66 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6e8ae1b24925fe153a115fe3a1a79298ad47a0882c24b2817356fa560baa4242 all runs: OK false negative chance: 0.000 # git bisect start 0d97f2067c166eb495771fede9f7b73999c67f66 0227b49b50276657243e54f5609e65c4f0eaaf4d Bisecting: 7315 revisions left to test after this (roughly 13 steps) [05a54fa773284d1a7923cdfdd8f0c8dabb98bd26] Merge tag 'sound-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound determine whether the revision contains the guilty commit revision 0227b49b50276657243e54f5609e65c4f0eaaf4d crashed and is reachable testing commit 05a54fa773284d1a7923cdfdd8f0c8dabb98bd26 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2650f1c99780b2863e64976f0a846eb246cb9d5c7d3e484885da399fbed41acb all runs: OK false negative chance: 0.000 # git bisect bad 05a54fa773284d1a7923cdfdd8f0c8dabb98bd26 Bisecting: 3533 revisions left to test after this (roughly 12 steps) [70de5572a82b3d510df31d2c572c15cd53a00870] Merge tag 'timers-clocksource-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip determine whether the revision contains the guilty commit revision 0227b49b50276657243e54f5609e65c4f0eaaf4d crashed and is reachable testing commit 70de5572a82b3d510df31d2c572c15cd53a00870 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d2af832ae22792bb94376f8728f5293e04fadf7ca8c78a1227740fc471a388f5 all runs: OK false negative chance: 0.000 # git bisect bad 70de5572a82b3d510df31d2c572c15cd53a00870 Bisecting: 1755 revisions left to test after this (roughly 11 steps) [cbf658dd09419f1ef9de11b9604e950bdd5c170b] Merge tag 'net-6.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net determine whether the revision contains the guilty commit revision 0227b49b50276657243e54f5609e65c4f0eaaf4d crashed and is reachable testing commit cbf658dd09419f1ef9de11b9604e950bdd5c170b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 098e8eac09d70b07dbcd6bf21fff0d37e2cc646a9cb638a2c959ec1ad0f287c4 all runs: OK false negative chance: 0.000 # git bisect bad cbf658dd09419f1ef9de11b9604e950bdd5c170b Bisecting: 898 revisions left to test after this (roughly 10 steps) [9c736ace0666efe68efd53fcdfa2c6653c3e0e72] Merge tag 'net-6.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net determine whether the revision contains the guilty commit revision 0227b49b50276657243e54f5609e65c4f0eaaf4d crashed and is reachable testing commit 9c736ace0666efe68efd53fcdfa2c6653c3e0e72 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9030788e8f3fb1a45a65316ed921590a6cfcda8a9e73a8f9864589b954b59e6f all runs: OK false negative chance: 0.000 # git bisect bad 9c736ace0666efe68efd53fcdfa2c6653c3e0e72 Bisecting: 495 revisions left to test after this (roughly 9 steps) [1c656b1efde6ce86a6c810d27a5f925e938d568d] Merge tag 'loongarch-fixes-6.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson determine whether the revision contains the guilty commit revision 0227b49b50276657243e54f5609e65c4f0eaaf4d crashed and is reachable testing commit 1c656b1efde6ce86a6c810d27a5f925e938d568d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 251a05425cdc91921493400e85e2a5659a036339de8093c1364432f86b11d8a1 all runs: OK false negative chance: 0.000 # git bisect bad 1c656b1efde6ce86a6c810d27a5f925e938d568d Bisecting: 201 revisions left to test after this (roughly 8 steps) [63467137ecc0ff6f804d53903ad87a2f0397a18b] Merge tag 'net-6.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net determine whether the revision contains the guilty commit revision 0227b49b50276657243e54f5609e65c4f0eaaf4d crashed and is reachable testing commit 63467137ecc0ff6f804d53903ad87a2f0397a18b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 46e00ac11f4dbcfc82feeea87a4283de432fc39226488d98c22094e56274030c all runs: OK false negative chance: 0.000 # git bisect bad 63467137ecc0ff6f804d53903ad87a2f0397a18b Bisecting: 101 revisions left to test after this (roughly 7 steps) [8f5ae30d69d7543eee0d70083daf4de8fe15d585] Linux 6.17-rc1 determine whether the revision contains the guilty commit revision 0227b49b50276657243e54f5609e65c4f0eaaf4d crashed and is reachable testing commit 8f5ae30d69d7543eee0d70083daf4de8fe15d585 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2437c296db4c52322e352df00dcfa7ee9c6a6afc6b4b99cf0da8532fc535112f all runs: crashed: WARNING in try_to_migrate_one representative crash: WARNING in try_to_migrate_one, types: [WARNING] # git bisect good 8f5ae30d69d7543eee0d70083daf4de8fe15d585 Bisecting: 50 revisions left to test after this (roughly 6 steps) [cf5fb87fcdaaaafec55dcc0dc5a9e15ead343973] netfilter: nf_tables: reject duplicate device on updates determine whether the revision contains the guilty commit checking the merge base 37816488247ddddbc3de113c78c83572274b1e2e no existing result, test the revision testing commit 37816488247ddddbc3de113c78c83572274b1e2e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1395a82023080ee2e6109675313ca3376cd344e9f6ccde78636dcd0306c84b8b all runs: crashed: WARNING in try_to_migrate_one representative crash: WARNING in try_to_migrate_one, types: [WARNING] testing commit cf5fb87fcdaaaafec55dcc0dc5a9e15ead343973 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f797dc4b079146eb3268628a032e9af1965e3a5f768ad4afd39c44b319aa6101 all runs: crashed: WARNING in try_to_migrate_one representative crash: WARNING in try_to_migrate_one, types: [WARNING] # git bisect good cf5fb87fcdaaaafec55dcc0dc5a9e15ead343973 Bisecting: 21 revisions left to test after this (roughly 5 steps) [91325f31afc1026de28665cf1a7b6e157fa4d39d] Merge tag 'mm-hotfixes-stable-2025-08-12-20-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm determine whether the revision contains the guilty commit revision 8f5ae30d69d7543eee0d70083daf4de8fe15d585 crashed and is reachable testing commit 91325f31afc1026de28665cf1a7b6e157fa4d39d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 89b34d7a78ac4cb2af30f88307d691183ad072175b3f9a0e08ac166a6449fbf7 all runs: OK false negative chance: 0.000 # git bisect bad 91325f31afc1026de28665cf1a7b6e157fa4d39d Bisecting: 14 revisions left to test after this (roughly 4 steps) [0e39a731820ad26533eb988cef27ad2506063b5b] Merge tag 'for-6.17-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux determine whether the revision contains the guilty commit revision 0227b49b50276657243e54f5609e65c4f0eaaf4d crashed and is reachable testing commit 0e39a731820ad26533eb988cef27ad2506063b5b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d13de32ce858a0c002fcd64bf57b13674e11da3c42e68e17525ee2d530dba6a6 all runs: crashed: WARNING in try_to_migrate_one representative crash: WARNING in try_to_migrate_one, types: [WARNING] # git bisect good 0e39a731820ad26533eb988cef27ad2506063b5b Bisecting: 7 revisions left to test after this (roughly 3 steps) [aa5a10b070690225317ed4d85413d144abfff750] fs/proc/task_mmu: hold PTL in pagemap_hugetlb_range and gather_hugetlb_stats determine whether the revision contains the guilty commit checking the merge base 6bcdbd62bd56e6d7383f9e06d9d148935b3c9b73 no existing result, test the revision testing commit 6bcdbd62bd56e6d7383f9e06d9d148935b3c9b73 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6e697fbb2056cebe6d62b7bb8411762b620dd55679d834d6401e815258cf73c4 all runs: crashed: WARNING in try_to_migrate_one representative crash: WARNING in try_to_migrate_one, types: [WARNING] testing commit aa5a10b070690225317ed4d85413d144abfff750 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2f9fa7bd66b507f50c878de066e46331c1c3b2054b7a259b8af8b91c9627231f all runs: crashed: WARNING in try_to_migrate_one representative crash: WARNING in try_to_migrate_one, types: [WARNING] # git bisect good aa5a10b070690225317ed4d85413d144abfff750 Bisecting: 3 revisions left to test after this (roughly 2 steps) [0b5be138ce00f421bd7cc5a226061bd62c4ab850] mm/mremap: avoid expensive folio lookup on mremap folio pte batch determine whether the revision contains the guilty commit revision aa5a10b070690225317ed4d85413d144abfff750 crashed and is reachable testing commit 0b5be138ce00f421bd7cc5a226061bd62c4ab850 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: de2b8fb8b657d5d7821d1bbd00e48ef253eede092088d918dadd0d9f649af352 all runs: OK false negative chance: 0.000 # git bisect bad 0b5be138ce00f421bd7cc5a226061bd62c4ab850 Bisecting: 1 revision left to test after this (roughly 1 step) [cf1b80dc31a1137b8b4568c138b453bf7453204a] mm: pass page directly instead of using folio_page determine whether the revision contains the guilty commit revision aa5a10b070690225317ed4d85413d144abfff750 crashed and is reachable testing commit cf1b80dc31a1137b8b4568c138b453bf7453204a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: af80f1268b3ba761a93712fef9825426f46606a17b25159916a0c198f91634ae all runs: OK false negative chance: 0.000 # git bisect bad cf1b80dc31a1137b8b4568c138b453bf7453204a Bisecting: 0 revisions left to test after this (roughly 0 steps) [ab5ac789efa985e42bdb5b5e8a7a4ad84935d44e] selftests/proc: fix string literal warning in proc-maps-race.c determine whether the revision contains the guilty commit revision aa5a10b070690225317ed4d85413d144abfff750 crashed and is reachable testing commit ab5ac789efa985e42bdb5b5e8a7a4ad84935d44e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0b42fe7ef307869998cf89f5192660ee3641b4d06f22ff850a26dcd710d5260b all runs: crashed: WARNING in try_to_migrate_one representative crash: WARNING in try_to_migrate_one, types: [WARNING] # git bisect good ab5ac789efa985e42bdb5b5e8a7a4ad84935d44e cf1b80dc31a1137b8b4568c138b453bf7453204a is the first bad commit commit cf1b80dc31a1137b8b4568c138b453bf7453204a Author: Dev Jain Date: Wed Aug 6 20:26:11 2025 +0530 mm: pass page directly instead of using folio_page In commit_anon_folio_batch(), we iterate over all pages pointed to by the PTE batch. Therefore we need to know the first page of the batch; currently we derive that via folio_page(folio, 0), but, that takes us to the first (head) page of the folio instead - our PTE batch may lie in the middle of the folio, leading to incorrectness. Bite the bullet and throw away the micro-optimization of reusing the folio in favour of code simplicity. Derive the page and the folio in change_pte_range, and pass the page too to commit_anon_folio_batch to fix the aforementioned issue. Link: https://lkml.kernel.org/r/20250806145611.3962-1-dev.jain@arm.com Fixes: cac1db8c3aad ("mm: optimize mprotect() by PTE batching") Reported-by: syzbot+57bcc752f0df8bb1365c@syzkaller.appspotmail.com Signed-off-by: Dev Jain Reviewed-by: Lorenzo Stoakes Debugged-by: David Hildenbrand Acked-by: David Hildenbrand Cc: Anshuman Khandual Cc: Barry Song Cc: Catalin Marinas Cc: Christophe Leroy Cc: Hugh Dickins Cc: Jann Horn Cc: Joey Gouly Cc: Kevin Brodsky Cc: Lance Yang Cc: Liam Howlett Cc: Matthew Wilcox (Oracle) Cc: Peter Xu Cc: Ryan Roberts Cc: Vlastimil Babka Cc: Will Deacon Cc: Yang Shi Cc: Yicong Yang Cc: Zhenhua Huang Cc: Zi Yan Signed-off-by: Andrew Morton mm/mprotect.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-) accumulated error probability: 0.00 culprit signature: af80f1268b3ba761a93712fef9825426f46606a17b25159916a0c198f91634ae parent signature: 0b42fe7ef307869998cf89f5192660ee3641b4d06f22ff850a26dcd710d5260b revisions tested: 24, total time: 12h52m56.387514776s (build: 8h13m16.872742691s, test: 3h53m41.971623928s) first good commit: cf1b80dc31a1137b8b4568c138b453bf7453204a mm: pass page directly instead of using folio_page recipients (to): ["akpm@linux-foundation.org" "david@redhat.com" "dev.jain@arm.com" "lorenzo.stoakes@oracle.com"] recipients (cc): []