ci2 starts bisection 2026-06-25 12:59:08.788830902 +0000 UTC m=+30310.914554950 bisecting fixing commit since c27210688955656e93e26cffab0a82bbca4e5d2b building syzkaller on 62fb93a255739705450473a63391e4b93a0c5545 ensuring issue is reproducible on original commit c27210688955656e93e26cffab0a82bbca4e5d2b testing commit c27210688955656e93e26cffab0a82bbca4e5d2b gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 805a4db7779cb393c5228ee711da1404057799d05b31b17744bb31092ca033d6 all runs: crashed: KASAN: use-after-free Write in hci_conn_hash_flush representative crash: KASAN: use-after-free Write in hci_conn_hash_flush, types: [KASAN-USE-AFTER-FREE-WRITE] check whether we can drop unnecessary instrumentation disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed testing commit c27210688955656e93e26cffab0a82bbca4e5d2b gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 958468eab6794068a942b28bbe0c28f7d5083884b6b63fd334b9d5e97d7db72d all runs: crashed: KASAN: use-after-free Write in hci_conn_hash_flush representative crash: KASAN: use-after-free Write in hci_conn_hash_flush, types: [KASAN-USE-AFTER-FREE-WRITE] the bug reproduces without the instrumentation disabling configs for [ubsan bug_or_warning locking atomic_sleep hang memleak], they are not needed kconfig minimization: base=7505 full=9786 leaves diff=2008 split chunks (needed=false): <2008> split chunk #0 of len 2008 into 5 parts testing without sub-chunk 1/5 disabling configs for [ubsan bug_or_warning locking atomic_sleep hang memleak], they are not needed testing commit c27210688955656e93e26cffab0a82bbca4e5d2b gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: ecf30b5fa53e74f35b380a18f84967f11a1a001dbd1da583062c7046ee825853 all runs: OK false negative chance: 0.000 testing without sub-chunk 2/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit c27210688955656e93e26cffab0a82bbca4e5d2b gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: fd05a4436ea32440a4b00de7a459d68bda4da56d669c91937765155d2f44e983 all runs: crashed: KASAN: use-after-free Write in hci_conn_hash_flush representative crash: KASAN: use-after-free Write in hci_conn_hash_flush, types: [KASAN-USE-AFTER-FREE-WRITE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit c27210688955656e93e26cffab0a82bbca4e5d2b gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: ad934c6731ebcc4208288cf09cf1dd5b3185b3f4906bb694f46b18448b2f6c3b all runs: crashed: KASAN: use-after-free Write in hci_conn_hash_flush representative crash: KASAN: use-after-free Write in hci_conn_hash_flush, types: [KASAN-USE-AFTER-FREE-WRITE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], they are not needed testing commit c27210688955656e93e26cffab0a82bbca4e5d2b gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 44a033f3fcd1be0a87dfc30bef8dbfa2ec14bc91cbc65fbe4152b5b3be372e8e all runs: crashed: KASAN: use-after-free Write in hci_conn_hash_flush representative crash: KASAN: use-after-free Write in hci_conn_hash_flush, types: [KASAN-USE-AFTER-FREE-WRITE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], they are not needed testing commit c27210688955656e93e26cffab0a82bbca4e5d2b gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 1d92034738ba7eebed2c78437191ad2910cb8c6e3115efac185763fd991b60af all runs: crashed: KASAN: use-after-free Write in hci_conn_hash_flush representative crash: KASAN: use-after-free Write in hci_conn_hash_flush, types: [KASAN-USE-AFTER-FREE-WRITE] the chunk can be dropped minimized to 402 configs; suspects: [6LOWPAN 6LOWPAN_GHC_EXT_HDR_DEST 6LOWPAN_GHC_EXT_HDR_FRAG 6LOWPAN_GHC_EXT_HDR_HOP 6LOWPAN_GHC_EXT_HDR_ROUTE 6LOWPAN_GHC_ICMPV6 6LOWPAN_GHC_UDP 6LOWPAN_NHC 6LOWPAN_NHC_DEST 6LOWPAN_NHC_FRAGMENT 6LOWPAN_NHC_HOP 6LOWPAN_NHC_IPV6 6LOWPAN_NHC_MOBILITY 6LOWPAN_NHC_ROUTING 6LOWPAN_NHC_UDP 6PACK 842_COMPRESS 842_DECOMPRESS 9P_FSCACHE 9P_FS_POSIX_ACL 9P_FS_SECURITY ACORN_PARTITION ACORN_PARTITION_ADFS ACORN_PARTITION_CUMANA ACORN_PARTITION_EESOX ACORN_PARTITION_ICS ACORN_PARTITION_POWERTEC ACORN_PARTITION_RISCIX ACPI_DOCK ADFS_FS AFFS_FS AFS_FS AFS_FSCACHE AF_KCM AF_RXRPC AF_RXRPC_IPV6 AIX_PARTITION AMIGA_PARTITION ANDROID_BINDERFS ANDROID_BINDER_IPC ANON_VMA_NAME APPLE_MFI_FASTCHARGE AR5523 ARM_SDE_INTERFACE ASM_MODVERSIONS ASYNC_CORE ASYNC_MEMCPY ASYNC_PQ ASYNC_RAID6_RECOV ASYNC_TX_DMA ASYNC_XOR ATARI_PARTITION ATA_GENERIC ATA_OVER_ETH ATA_PIIX ATH10K ATH10K_CE ATH10K_PCI ATH10K_SNOC ATH10K_USB ATH11K ATH11K_AHB ATH11K_PCI ATH6KL ATH6KL_USB ATH9K ATH9K_AHB ATH9K_BTCOEX_SUPPORT ATH9K_CHANNEL_CONTEXT ATH9K_COMMON ATH9K_COMMON_DEBUG ATH9K_COMMON_SPECTRAL ATH9K_DEBUGFS ATH9K_DYNACK ATH9K_HTC ATH9K_HTC_DEBUGFS ATH9K_HW ATH9K_PCI ATH9K_PCOEM ATH9K_RFKILL ATH_COMMON ATM ATM_BR2684 ATM_CLIP ATM_DRIVERS ATM_LANE ATM_MPOA ATM_TCP AX25 AX25_DAMA_SLAVE BAREUDP BATMAN_ADV BATMAN_ADV_BATMAN_V BATMAN_ADV_BLA BATMAN_ADV_DAT BATMAN_ADV_MCAST BATMAN_ADV_NC BCACHE BCMA BCMA_HOST_PCI_POSSIBLE BEFS_FS BFQ_CGROUP_DEBUG BFQ_GROUP_IOSCHED BFS_FS BIG_KEYS BINFMT_MISC BLK_CGROUP_IOCOST BLK_CGROUP_IOLATENCY BLK_CGROUP_RWSTAT BLK_DEBUG_FS_ZONED BLK_DEV_NULL_BLK BLK_DEV_NULL_BLK_FAULT_INJECTION BLK_DEV_RAM BLK_DEV_RNBD BLK_DEV_RNBD_CLIENT BLK_DEV_SR BLK_DEV_THROTTLING BLK_DEV_ZONED BLK_ICQ BLK_INLINE_ENCRYPTION BLK_INLINE_ENCRYPTION_FALLBACK BLK_MQ_RDMA BLK_RQ_ALLOC_TIME BLK_WBT BLK_WBT_MQ BONDING BPF_JIT_ALWAYS_ON BPQETHER BRIDGE_CFM BRIDGE_EBT_802_3 BRIDGE_EBT_AMONG BRIDGE_EBT_ARP BRIDGE_EBT_ARPREPLY BRIDGE_EBT_BROUTE BRIDGE_EBT_DNAT BRIDGE_EBT_IP BRIDGE_EBT_IP6 BRIDGE_EBT_LIMIT BRIDGE_EBT_LOG BRIDGE_EBT_MARK BRIDGE_EBT_MARK_T BRIDGE_EBT_NFLOG BRIDGE_EBT_PKTTYPE BRIDGE_EBT_REDIRECT BRIDGE_EBT_SNAT BRIDGE_EBT_STP BRIDGE_EBT_T_FILTER BRIDGE_EBT_T_NAT BRIDGE_EBT_VLAN BRIDGE_MRP BRIDGE_NF_EBTABLES BSD_DISKLABEL BTRFS_ASSERT BTRFS_FS_REF_VERIFY BT_6LOWPAN BT_ATH3K BT_BNEP BT_BNEP_MC_FILTER BT_BNEP_PROTO_FILTER BT_CMTP BT_HCIBCM203X BT_HCIBFUSB BT_HCIBPA10X BT_HCIBTUSB_AUTOSUSPEND BT_HCIBTUSB_MTK BT_HCIUART_3WIRE BT_HCIUART_AG6XX BT_HCIUART_BCSP BT_HCIVHCI BT_HS BT_LE BT_MSFTEXT BT_MTK BT_RFCOMM BT_RFCOMM_TTY CACHEFILES CAIF CAIF_DEBUG CAIF_DRIVERS CAIF_NETDEV CAIF_TTY CAIF_USB CAIF_VIRTIO CAN_8DEV_USB CAN_EMS_USB CAN_ESD_USB CAN_ETAS_ES58X CAN_GS_USB CAN_IFI_CANFD CAN_ISOTP CAN_J1939 CAN_KVASER_USB CAN_MCBA_USB CAN_PEAK_USB CAN_SLCAN CAN_UCAN CAN_VCAN CAN_VXCAN CAPI_TRACE CARL9170 CARL9170_HWRNG CARL9170_LEDS CARL9170_WPC CDROM CEC_CORE CEC_NOTIFIER CEPH_FS CEPH_FSCACHE CEPH_FS_POSIX_ACL CEPH_LIB CEPH_LIB_USE_DNS_RESOLVER CFG80211 CFG80211_CRDA_SUPPORT CFG80211_DEBUGFS CFG80211_DEFAULT_PS CFG80211_REQUIRE_SIGNED_REGDB CFG80211_USE_KERNEL_REGDB_KEYS CFG80211_WEXT CFS_BANDWIDTH CGROUP_NET_CLASSID CGROUP_NET_PRIO CGROUP_RDMA CHARGER_BQ24190 CHARGER_ISP1704 CHECKPOINT_RESTORE CHECK_SIGNATURE CHR_DEV_SG CHR_DEV_ST CIFS CIFS_ALLOW_INSECURE_LEGACY CIFS_DEBUG CIFS_DFS_UPCALL CIFS_FSCACHE CIFS_POSIX CIFS_SMB_DIRECT CIFS_SWN_UPCALL CIFS_UPCALL CIFS_XATTR CLS_U32_MARK CLS_U32_PERF CMDLINE_PARTITION COMEDI COMEDI_8254 COMEDI_8255 COMEDI_8255_PCI COMEDI_8255_SA COMEDI_ADL_PCI9118 COMEDI_BOND COMEDI_DT9812 COMEDI_KCOMEDILIB COMEDI_MISC_DRIVERS COMEDI_NI_DAQ_700_CS COMEDI_NI_LABPC COMEDI_NI_LABPC_CS COMEDI_NI_LABPC_PCI COMEDI_NI_USB6501 COMEDI_PARPORT COMEDI_PCI_DRIVERS COMEDI_PCMCIA_DRIVERS COMEDI_TEST COMEDI_USBDUX COMEDI_USBDUXFAST COMEDI_USBDUXSIGMA COMEDI_USB_DRIVERS COMEDI_VMK80XX COMPAT_NETLINK_MESSAGES CONNECTOR COUNTER CPU_FREQ_DEFAULT_GOV_USERSPACE CRAMFS CRAMFS_BLOCKDEV CRAMFS_MTD CRC4 CRYPTO_ADIANTUM CRYPTO_AEGIS128 CRYPTO_AES_ARM64 CRYPTO_AES_TI CRYPTO_ANUBIS CRYPTO_ARC4 CRYPTO_ARCH_HAVE_LIB_POLY1305 CRYPTO_ARIA CRYPTO_BLOWFISH CRYPTO_BLOWFISH_COMMON CRYPTO_CAMELLIA CRYPTO_CHACHA20 CRYPTO_CHACHA20POLY1305 CRYPTO_CRC32 CRYPTO_CTS CRYPTO_DEV_CCP CRYPTO_DEV_CCP_DD CRYPTO_DEV_VIRTIO CRYPTO_DRBG_CTR CRYPTO_DRBG_HASH CRYPTO_ECRDSA CRYPTO_ESSIV CRYPTO_FCRYPT CRYPTO_HCTR2 CRYPTO_KDF800108_CTR CRYPTO_KEYWRAP CRYPTO_KHAZAD CRYPTO_LIB_ARC4 CRYPTO_LIB_CHACHA CRYPTO_LIB_CHACHA20POLY1305 CRYPTO_LIB_CURVE25519 CRYPTO_LIB_POLY1305 CRYPTO_LIB_POLY1305_GENERIC CRYPTO_LRW CRYPTO_NHPOLY1305 CRYPTO_PCBC CRYPTO_PCRYPT CRYPTO_POLY1305 CRYPTO_POLY1305_NEON CRYPTO_POLYVAL CRYPTO_RMD160 CRYPTO_SEED CRYPTO_SEQIV CRYPTO_SM2 CRYPTO_SM4_ARM64_CE CRYPTO_SM4_ARM64_CE_BLK CRYPTO_SM4_ARM64_NEON_BLK CRYPTO_STREEBOG CRYPTO_TEA CRYPTO_TWOFISH CRYPTO_TWOFISH_COMMON CRYPTO_USER CRYPTO_USER_API_AEAD CRYPTO_USER_API_HASH CRYPTO_USER_API_SKCIPHER CRYPTO_VMAC CRYPTO_WP512 CRYPTO_XCBC CRYPTO_XCTR CYPRESS_FIRMWARE DAMON DAMON_DBGFS DAMON_PADDR DAMON_RECLAIM DAMON_VADDR DAX DCB DEFAULT_CUBIC DEFAULT_PFIFO_FAST DEVICE_MIGRATION DEVICE_PRIVATE DLN2_ADC DMABUF_HEAPS DMABUF_HEAPS_CMA DMABUF_HEAPS_SYSTEM DMABUF_MOVE_NOTIFY DM_AUDIT DM_BIO_PRISON DM_BUFIO DM_CACHE DM_CACHE_SMQ DM_CLONE DM_CRYPT DM_FLAKEY DM_INTEGRITY DM_MULTIPATH DM_MULTIPATH_QL DM_MULTIPATH_ST DM_PERSISTENT_DATA DM_RAID DM_SNAPSHOT DM_THIN_PROVISIONING DM_UEVENT DM_VERITY DM_VERITY_FEC DM_WRITECACHE DM_ZONED DRAGONRISE_FF DRM DRM_ANALOGIX_DP DRM_BOCHS DRM_BRIDGE DRM_CDNS_MHDP8546 DRM_CDNS_MHDP8546_J721E DRM_CIRRUS_QEMU DRM_DEBUG_MM DRM_DISPLAY_CONNECTOR DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_DP_AUX_BUS DRM_DW_HDMI DRM_DW_HDMI_AHB_AUDIO DRM_DW_HDMI_CEC DRM_DW_HDMI_I2S_AUDIO DRM_DW_MIPI_DSI DRM_ETNAVIV DRM_ETNAVIV_THERMAL DRM_EXYNOS DRM_EXYNOS5433_DECON DRM_EXYNOS7_DECON DRM_EXYNOS_DSI DRM_EXYNOS_HDMI DRM_EXYNOS_MIC DRM_FBDEV_EMULATION DRM_GEM_DMA_HELPER DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD DRM_HDLCD DRM_HISI_HIBMC DRM_HISI_KIRIN DRM_I2C_ADV7511 DRM_I2C_ADV7511_AUDIO DRM_I2C_ADV7511_CEC DRM_I2C_CH7006 DRM_I2C_NXP_TDA998X DRM_I2C_SIL164 DRM_IMX_DCSS DRM_KMS_HELPER DRM_KOMEDA DRM_LEGACY DRM_LIMA DRM_LONTIUM_LT8912B DRM_LONTIUM_LT9611 DRM_LONTIUM_LT9611UXC DRM_MALI_DISPLAY DRM_MEDIATEK DRM_MEDIATEK_HDMI DRM_MESON DRM_MESON_DW_HDMI DRM_MIPI_DSI DRM_MSM DRM_MSM_DP DRM_MSM_DPU DRM_MSM_DSI DRM_MSM_DSI_10NM_PHY DRM_MSM_DSI_14NM_PHY DRM_MSM_DSI_20NM_PHY DRM_MSM_DSI_28NM_8960_PHY DRM_MSM_DSI_28NM_PHY DRM_MSM_DSI_7NM_PHY DRM_MSM_GPU_STATE DRM_MSM_HDMI DRM_MSM_HDMI_HDCP DRM_MSM_MDP4 DRM_MSM_MDP5 DRM_MSM_MDSS DRM_MXS DRM_MXSFB DRM_NOMODESET DRM_NOUVEAU DRM_NOUVEAU_BACKLIGHT DRM_NWL_MIPI_DSI DRM_PANEL DRM_PANEL_BOE_TV101WUM_NL6 DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_LVDS DRM_PANEL_MANTIX_MLAF057WE51 DRM_PANEL_RAYDIUM_RM67191 DRM_PANEL_SIMPLE DRM_PANEL_SITRONIX_ST7703 DRM_PANEL_TRULY_NT35597_WQXGA DRM_PANFROST DRM_PARADE_PS8640 DRM_PL111 DRM_RCAR_CMM DRM_RCAR_DU DRM_RCAR_DW_HDMI DRM_RCAR_LVDS DRM_RCAR_MIPI_DSI DRM_RCAR_USE_CMM DRM_RCAR_USE_LVDS DRM_RCAR_USE_MIPI_DSI DRM_RCAR_VSP DRM_RCAR_WRITEBACK DRM_SCHED DRM_SII902X DRM_SIMPLEDRM DRM_SIMPLE_BRIDGE DRM_SUN4I DRM_SUN6I_DSI DRM_SUN8I_DW_HDMI DRM_SUN8I_MIXER DRM_SUN8I_TCON_TOP DRM_TEGRA DRM_THINE_THC63LVD1024 ENCRYPTED_KEYS FSCACHE HAMRADIO HID_DRAGONRISE INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT IOSCHED_BFQ ISDN ISDN_CAPI MAC80211 MAC80211_LEDS MFD_DLN2 NET_CLS_U32 NET_SCH_DEFAULT PARTITION_ADVANCED PCCARD PCMCIA RFKILL SND SND_SOC SOUND TCP_CONG_ADVANCED TLS TLS_DEVICE TRUSTED_KEYS WEXT_CORE WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ATH ZONE_DEVICE] disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing current HEAD fdb6fcb41cc741ad5eaa7995f278dfcb94fdf795 testing commit fdb6fcb41cc741ad5eaa7995f278dfcb94fdf795 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 5c43fe446b1a1cd2c7690a1843f41f1efbe48046fe990133345c6b3c8fb41810 all runs: crashed: KASAN: use-after-free Write in hci_conn_hash_flush representative crash: KASAN: use-after-free Write in hci_conn_hash_flush, types: [KASAN-USE-AFTER-FREE-WRITE] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 2h53m20.493097289s (build: 1h26m23.234670344s, test: 1h8m37.894486618s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.176 crash: KASAN: use-after-free Write in hci_conn_hash_flush ================================================================== BUG: KASAN: use-after-free in hci_conn_unlink net/bluetooth/hci_conn.c:1085 [inline] BUG: KASAN: use-after-free in hci_conn_hash_flush+0x194/0x21c net/bluetooth/hci_conn.c:2510 Write of size 8 at addr ffff0000d4cecad0 by task syz-executor/3542 CPU: 0 PID: 3542 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 Call trace: dump_backtrace+0x100/0x14c arch/arm64/kernel/stacktrace.c:158 show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x28/0x38 lib/dump_stack.c:88 dump_stack_lvl+0x64/0x90 lib/dump_stack.c:106 print_address_description+0x88/0x218 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:420 kasan_report+0xa8/0xf8 mm/kasan/report.c:524 __asan_report_store8_noabort+0x2c/0x38 mm/kasan/report_generic.c:356 hci_conn_unlink net/bluetooth/hci_conn.c:1085 [inline] hci_conn_hash_flush+0x194/0x21c net/bluetooth/hci_conn.c:2510 hci_dev_close_sync+0x798/0xdec net/bluetooth/hci_sync.c:5260 hci_dev_do_close net/bluetooth/hci_core.c:528 [inline] hci_unregister_dev+0x1d0/0x428 net/bluetooth/hci_core.c:2731 vhci_release+0x70/0xb8 drivers/bluetooth/hci_vhci.c:573 __fput+0x148/0x5ec fs/file_table.c:320 ____fput+0x10/0x1c fs/file_table.c:348 task_work_run+0x180/0x214 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x58c/0x1764 kernel/exit.c:881 do_group_exit+0x174/0x208 kernel/exit.c:1024 get_signal+0xc7c/0xd90 kernel/signal.c:2872 do_signal arch/arm64/kernel/signal.c:1095 [inline] do_notify_resume+0x268/0x1f88 arch/arm64/kernel/signal.c:1148 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x60/0xc4 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 4474: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:53 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:375 [inline] __kasan_kmalloc+0xa0/0xb8 mm/kasan/common.c:384 kasan_kmalloc include/linux/kasan.h:211 [inline] kmalloc_trace+0x54/0x68 mm/slab_common.c:1031 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] hci_conn_add+0xbc/0xfb8 net/bluetooth/hci_conn.c:990 hci_connect_sco+0x148/0x3ac net/bluetooth/hci_conn.c:1630 sco_connect net/bluetooth/sco.c:280 [inline] sco_sock_connect+0x184/0x620 net/bluetooth/sco.c:645 __sys_connect_file net/socket.c:2011 [inline] __sys_connect+0x21c/0x250 net/socket.c:2028 __do_sys_connect net/socket.c:2038 [inline] __se_sys_connect net/socket.c:2035 [inline] __arm64_sys_connect+0x78/0x90 net/socket.c:2035 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x78/0x230 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x160/0x1d4 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x50/0xfc arch/arm64/kernel/syscall.c:204 el0_svc+0x34/0xc4 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Freed by task 3542: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:53 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516 ____kasan_slab_free+0x148/0x1b0 mm/kasan/common.c:237 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:245 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1729 [inline] slab_free_freelist_hook+0x16c/0x1e8 mm/slub.c:1755 slab_free mm/slub.c:3687 [inline] __kmem_cache_free+0xbc/0x21c mm/slub.c:3700 kfree+0x88/0xb8 mm/slab_common.c:988 bt_link_release+0x14/0x20 net/bluetooth/hci_sysfs.c:14 device_release+0x8c/0x12c drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:681 [inline] kobject_release lib/kobject.c:712 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x138/0x310 lib/kobject.c:729 put_device+0x14/0x20 drivers/base/core.c:3820 hci_conn_del_sysfs+0x60/0x11c net/bluetooth/hci_sysfs.c:60 hci_conn_cleanup+0x3e8/0x580 net/bluetooth/hci_conn.c:172 hci_conn_del+0x324/0x4fc net/bluetooth/hci_conn.c:1152 hci_conn_hash_flush+0x78/0x21c net/bluetooth/hci_conn.c:2511 hci_dev_close_sync+0x798/0xdec net/bluetooth/hci_sync.c:5260 hci_dev_do_close net/bluetooth/hci_core.c:528 [inline] hci_unregister_dev+0x1d0/0x428 net/bluetooth/hci_core.c:2731 vhci_release+0x70/0xb8 drivers/bluetooth/hci_vhci.c:573 __fput+0x148/0x5ec fs/file_table.c:320 ____fput+0x10/0x1c fs/file_table.c:348 task_work_run+0x180/0x214 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x58c/0x1764 kernel/exit.c:881 do_group_exit+0x174/0x208 kernel/exit.c:1024 get_signal+0xc7c/0xd90 kernel/signal.c:2872 do_signal arch/arm64/kernel/signal.c:1095 [inline] do_notify_resume+0x268/0x1f88 arch/arm64/kernel/signal.c:1148 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x60/0xc4 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:46 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 insert_work+0x60/0x288 kernel/workqueue.c:1361 __queue_work+0x868/0x964 kernel/workqueue.c:1520 __queue_delayed_work kernel/workqueue.c:1668 [inline] queue_delayed_work_on+0x140/0x1d0 kernel/workqueue.c:1704 queue_delayed_work include/linux/workqueue.h:527 [inline] hci_conn_drop+0x138/0x254 include/net/bluetooth/hci_core.h:1448 sco_chan_del net/bluetooth/sco.c:184 [inline] __sco_sock_close+0x23c/0x710 net/bluetooth/sco.c:492 sco_sock_close net/bluetooth/sco.c:507 [inline] sco_sock_release+0x9c/0x25c net/bluetooth/sco.c:1303 __sock_release net/socket.c:654 [inline] sock_close+0xa4/0x1c8 net/socket.c:1400 __fput+0x148/0x5ec fs/file_table.c:320 ____fput+0x10/0x1c fs/file_table.c:348 task_work_run+0x180/0x214 kernel/task_work.c:203 get_signal+0xbd4/0xd90 kernel/signal.c:2649 do_signal arch/arm64/kernel/signal.c:1095 [inline] do_notify_resume+0x268/0x1f88 arch/arm64/kernel/signal.c:1148 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x60/0xc4 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Second to last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:46 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 insert_work+0x60/0x288 kernel/workqueue.c:1361 __queue_work+0x868/0x964 kernel/workqueue.c:1520 __queue_delayed_work kernel/workqueue.c:1668 [inline] queue_delayed_work_on+0x140/0x1d0 kernel/workqueue.c:1704 queue_delayed_work include/linux/workqueue.h:527 [inline] hci_conn_drop+0x138/0x254 include/net/bluetooth/hci_core.h:1448 sco_chan_del net/bluetooth/sco.c:184 [inline] __sco_sock_close+0x23c/0x710 net/bluetooth/sco.c:492 sco_sock_close net/bluetooth/sco.c:507 [inline] sco_sock_release+0x9c/0x25c net/bluetooth/sco.c:1303 __sock_release net/socket.c:654 [inline] sock_close+0xa4/0x1c8 net/socket.c:1400 __fput+0x148/0x5ec fs/file_table.c:320 ____fput+0x10/0x1c fs/file_table.c:348 task_work_run+0x180/0x214 kernel/task_work.c:203 get_signal+0xbd4/0xd90 kernel/signal.c:2649 do_signal arch/arm64/kernel/signal.c:1095 [inline] do_notify_resume+0x268/0x1f88 arch/arm64/kernel/signal.c:1148 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x60/0xc4 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the object at ffff0000d4cec000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2768 bytes inside of 4096-byte region [ffff0000d4cec000, ffff0000d4ced000) The buggy address belongs to the physical page: page:00000000fa0f3b43 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x114ce8 head:00000000fa0f3b43 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002a80 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d4cec980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d4ceca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000d4ceca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000d4cecb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d4cecb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================