ci starts bisection 2025-06-15 17:26:28.615417986 +0000 UTC m=+96030.003119611 bisecting fixing commit since 27eddbf3449026a73d6ed52d55b192bfcf526a03 building syzkaller on 0808a665bc75ab0845906bfeca0d12fb520ae6eb ensuring issue is reproducible on original commit 27eddbf3449026a73d6ed52d55b192bfcf526a03 testing commit 27eddbf3449026a73d6ed52d55b192bfcf526a03 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 939ff855e914ba23e737e4540a2a9e6d8994762bf49fb2f9e08929c9b70a0df0 all runs: crashed: KASAN: use-after-free Read in check_dirent representative crash: KASAN: use-after-free Read in check_dirent, types: [KASAN] check whether we can drop unnecessary instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG LOCKDEP], they are not needed testing commit 27eddbf3449026a73d6ed52d55b192bfcf526a03 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 24024a250dad5a587b2f95f9185d366d0b66fdba54e8dc094369e0b9c92651bd all runs: crashed: KASAN: use-after-free Read in check_dirent representative crash: KASAN: use-after-free Read in check_dirent, types: [KASAN] the bug reproduces without the instrumentation disabling configs for [LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG], they are not needed kconfig minimization: base=4090 full=8265 leaves diff=2140 split chunks (needed=false): <2140> split chunk #0 of len 2140 into 5 parts testing without sub-chunk 1/5 disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 27eddbf3449026a73d6ed52d55b192bfcf526a03 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6aa886bc0713980c23ac327e568e6e8b4168d73cc573297a8d53a2415e33b8fe all runs: OK false negative chance: 0.000 testing without sub-chunk 2/5 disabling configs for [LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 27eddbf3449026a73d6ed52d55b192bfcf526a03 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a83c3c6d720b936d43af50c2821e3b9e82a0ef644fd24a10403e11e98181c274 all runs: crashed: KASAN: use-after-free Read in check_dirent representative crash: KASAN: use-after-free Read in check_dirent, types: [KASAN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 27eddbf3449026a73d6ed52d55b192bfcf526a03 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fac9e6815365a2cd24695908af6bdd400af7157da93204e0b4ef87d0e8b08547 all runs: crashed: KASAN: use-after-free Read in check_dirent representative crash: KASAN: use-after-free Read in check_dirent, types: [KASAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 27eddbf3449026a73d6ed52d55b192bfcf526a03 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7e66e623165922f062c2118a55557c6d59fc499cb073e3dbee25a6fa5473a186 all runs: crashed: KASAN: use-after-free Read in check_dirent representative crash: KASAN: use-after-free Read in check_dirent, types: [KASAN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 27eddbf3449026a73d6ed52d55b192bfcf526a03 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3ce486c5d970d5df8143b9c0f14152e89bcf551cf470e3afb7d78cc969dd0b74 all runs: crashed: KASAN: use-after-free Read in check_dirent representative crash: KASAN: use-after-free Read in check_dirent, types: [KASAN] the chunk can be dropped minimized to 428 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_NFIT ACPI_NHLT ACPI_PLATFORM_PROFILE ADFS_FS AFFS_FS AFS_FS AFS_FSCACHE AF_KCM AF_RXRPC AF_RXRPC_IPV6 AIX_PARTITION AMD_SFH_HID AMIGA_PARTITION ANDROID_BINDER_IPC ANON_VMA_NAME APERTURE_HELPERS APPLE_MFI_FASTCHARGE AR5523 ARCH_ENABLE_MEMORY_HOTREMOVE ARCH_ENABLE_THP_MIGRATION ARCH_HAS_CRC32 ARCH_HAS_CRC_T10DIF ARCH_HAS_USER_SHADOW_STACK ARCH_SUPPORTS_HUGE_PFNMAP ARCH_SUPPORTS_PMD_PFNMAP ARCH_SUPPORTS_PUD_PFNMAP ARCH_WANT_PMD_MKWRITE ASM_MODVERSIONS ASUS_TF103C_DOCK ASYNC_CORE ASYNC_MEMCPY ASYNC_PQ ASYNC_RAID6_RECOV ASYNC_TX_DMA ASYNC_XOR AS_SHA1_NI AS_SHA256_NI AS_TPAUSE ATARI_PARTITION ATA_GENERIC ATA_OVER_ETH ATH10K ATH10K_CE ATH10K_LEDS ATH10K_PCI ATH10K_USB ATH11K 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 AUXILIARY_BUS AX25 AX25_DAMA_SLAVE AX88796B_PHY BAREUDP BATMAN_ADV BATMAN_ADV_BATMAN_V BATMAN_ADV_BLA BATMAN_ADV_DAT BATMAN_ADV_MCAST BATMAN_ADV_NC BCACHE BCACHEFS_DEBUG BCACHEFS_ERASURE_CODING BCACHEFS_FS BCACHEFS_POSIX_ACL BCACHEFS_QUOTA BCACHEFS_SIX_OPTIMISTIC_SPIN BCMA BCMA_HOST_PCI_POSSIBLE BEFS_FS BFQ_CGROUP_DEBUG BFQ_GROUP_IOSCHED BFS_FS BIG_KEYS BLK_CGROUP_PUNT_BIO BLK_CGROUP_RWSTAT BLK_DEV_BSGLIB BLK_DEV_INTEGRITY BLK_DEV_NBD BLK_DEV_NULL_BLK BLK_DEV_NULL_BLK_FAULT_INJECTION BLK_DEV_NVME BLK_DEV_PMEM BLK_DEV_RAM BLK_DEV_RNBD BLK_DEV_RNBD_CLIENT BLK_DEV_THROTTLING BLK_DEV_ZONED BLK_ICQ BLK_INLINE_ENCRYPTION BLK_INLINE_ENCRYPTION_FALLBACK BLK_MQ_PCI BLK_MQ_VIRTIO BLK_WBT BLK_WBT_MQ BONDING BOOT_VESA_SUPPORT BPF_EVENTS BPF_JIT BPF_JIT_ALWAYS_ON BPF_JIT_DEFAULT_ON BPF_LSM BPF_PRELOAD BPF_PRELOAD_UMD BPF_STREAM_PARSER BPF_SYSCALL BPQETHER BRIDGE 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_IGMP_SNOOPING BRIDGE_MRP BRIDGE_NF_EBTABLES BRIDGE_NF_EBTABLES_LEGACY BRIDGE_VLAN_FILTERING BSD_DISKLABEL BSD_PROCESS_ACCT_V3 BT BTRFS_ASSERT BTRFS_FS BTRFS_FS_POSIX_ACL BTRFS_FS_REF_VERIFY BTT BT_6LOWPAN BT_ATH3K BT_BCM BT_BNEP BT_BNEP_MC_FILTER BT_BNEP_PROTO_FILTER BT_BREDR BT_HCIBCM203X BT_HCIBFUSB BT_HCIBPA10X BT_HCIBTUSB BT_HCIBTUSB_AUTOSUSPEND BT_HCIBTUSB_BCM BT_HCIBTUSB_MTK BT_HCIBTUSB_POLL_SYNC BT_HCIBTUSB_RTL BT_HCIUART BT_HCIUART_3WIRE BT_HCIUART_AG6XX BT_HCIUART_BCSP BT_HCIUART_H4 BT_HCIUART_LL BT_HCIUART_MRVL BT_HCIUART_QCA BT_HCIUART_SERDEV BT_HCIVHCI BT_INTEL BT_LE BT_LEDS BT_LE_L2CAP_ECRED BT_MRVL BT_MRVL_SDIO BT_MSFTEXT BT_MTK BT_MTKSDIO BT_MTKUART BT_QCA BT_RFCOMM BT_RFCOMM_TTY BT_RTL CACHEFILES CAIF CAIF_DEBUG CAIF_DRIVERS CAIF_NETDEV CAIF_TTY CAIF_USB CAIF_VIRTIO CAN CAN_8DEV_USB CAN_BCM CAN_CALC_BITTIMING CAN_DEV CAN_EMS_USB CAN_ESD_USB CAN_ETAS_ES58X CAN_F81604 CAN_GS_USB CAN_GW CAN_IFI_CANFD CAN_ISOTP CAN_J1939 CAN_KVASER_USB CAN_MCBA_USB CAN_NETLINK CAN_PEAK_USB CAN_RAW CAN_RX_OFFLOAD CAN_SLCAN CAN_UCAN CAN_VCAN CAN_VXCAN CARL9170 CARL9170_HWRNG CARL9170_LEDS CARL9170_WPC CC_CAN_LINK_STATIC CC_HAS_SANE_STACKPROTECTOR CEC_CORE 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_BPF CHARGER_ISP1704 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 CLOSURES CLS_U32_MARK CLS_U32_PERF CMA CMA_SIZE_SEL_MAX CMDLINE_PARTITION COMEDI COMEDI_DT9812 COMEDI_NI_USB6501 COMEDI_USBDUX COMEDI_USBDUXFAST COMEDI_USBDUXSIGMA COMEDI_USB_DRIVERS COMEDI_VMK80XX COMPAT_NETLINK_MESSAGES COUNTER CRAMFS CRAMFS_BLOCKDEV CRAMFS_MTD CRC4 CRC64 CRC64_ROCKSOFT CRC7 CRC8 CRC_CCITT CRC_ITU_T CRC_T10DIF CRC_T10DIF_ARCH CRYPTO_842 CRYPTO_ADIANTUM CRYPTO_AEGIS128 CRYPTO_AEGIS128_AESNI_SSE2 CRYPTO_AES_NI_INTEL CRYPTO_AES_TI CRYPTO_ANSI_CPRNG CRYPTO_ANUBIS CRYPTO_ARC4 CRYPTO_ARCH_HAVE_LIB_BLAKE2S CRYPTO_ARCH_HAVE_LIB_CHACHA CRYPTO_ARCH_HAVE_LIB_CURVE25519 CRYPTO_ARCH_HAVE_LIB_POLY1305 CRYPTO_ARIA CRYPTO_ARIA_AESNI_AVX_X86_64 CRYPTO_BLAKE2B CRYPTO_BLAKE2S_X86 CRYPTO_BLOWFISH CRYPTO_BLOWFISH_COMMON CRYPTO_BLOWFISH_X86_64 CRYPTO_CAMELLIA CRYPTO_CAMELLIA_AESNI_AVX2_X86_64 CRYPTO_CAMELLIA_AESNI_AVX_X86_64 CRYPTO_CAMELLIA_X86_64 CRYPTO_CAST5 CRYPTO_CAST5_AVX_X86_64 CRYPTO_CAST6 CRYPTO_CAST6_AVX_X86_64 CRYPTO_CAST_COMMON CRYPTO_CHACHA20 CRYPTO_CHACHA20POLY1305 CRYPTO_CHACHA20_X86_64 CRYPTO_CRC32 CRYPTO_CRC32C CRYPTO_CRC64_ROCKSOFT CRYPTO_CRYPTD CRYPTO_CTS CRYPTO_CURVE25519 CRYPTO_CURVE25519_X86 CRYPTO_DEFLATE CRYPTO_DES CRYPTO_DES3_EDE_X86_64 CRYPTO_DEV_CCP CRYPTO_DEV_CCP_DD CRYPTO_DEV_PADLOCK CRYPTO_DEV_PADLOCK_AES CRYPTO_DEV_PADLOCK_SHA CRYPTO_DEV_QAT CRYPTO_DEV_QAT_C3XXX CRYPTO_DEV_QAT_C3XXXVF CRYPTO_DEV_QAT_C62X CRYPTO_DEV_QAT_C62XVF CRYPTO_DEV_QAT_DH895xCC CRYPTO_DEV_QAT_DH895xCCVF CRYPTO_DEV_VIRTIO CRYPTO_DH CRYPTO_DRBG_CTR CRYPTO_DRBG_HASH CRYPTO_ECDH CRYPTO_ECRDSA CRYPTO_ENGINE CRYPTO_ESSIV CRYPTO_FCRYPT CRYPTO_GHASH_CLMUL_NI_INTEL CRYPTO_HCTR2 CRYPTO_KDF800108_CTR CRYPTO_KHAZAD CRYPTO_KPP CRYPTO_LIB_ARC4 CRYPTO_LIB_CHACHA CRYPTO_LIB_CHACHA20POLY1305 CRYPTO_LIB_CHACHA_GENERIC CRYPTO_LIB_CURVE25519 CRYPTO_LIB_CURVE25519_GENERIC CRYPTO_LIB_DES CRYPTO_LIB_POLY1305 CRYPTO_LIB_POLY1305_GENERIC CRYPTO_LRW CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_MANAGER_DISABLE_TESTS CRYPTO_MICHAEL_MIC CRYPTO_NHPOLY1305 CRYPTO_NHPOLY1305_AVX2 CRYPTO_NHPOLY1305_SSE2 CRYPTO_NULL CRYPTO_NULL2 CRYPTO_PCBC CRYPTO_PCRYPT CRYPTO_POLY1305 CRYPTO_POLY1305_X86_64 CRYPTO_POLYVAL CRYPTO_POLYVAL_CLMUL_NI CRYPTO_RMD160 CRYPTO_SEED CRYPTO_SERPENT CRYPTO_SERPENT_AVX2_X86_64 CRYPTO_SERPENT_AVX_X86_64 CRYPTO_SERPENT_SSE2_X86_64 CRYPTO_SHA1_SSSE3 CRYPTO_SHA256_SSSE3 CRYPTO_SHA512_SSSE3 CRYPTO_SIMD CRYPTO_SM3 CRYPTO_SM3_AVX_X86_64 CRYPTO_SM4 CRYPTO_SM4_AESNI_AVX2_X86_64 CRYPTO_SM4_AESNI_AVX_X86_64 CRYPTO_SM4_GENERIC CRYPTO_STREEBOG CRYPTO_TEA CRYPTO_TWOFISH CRYPTO_TWOFISH_AVX_X86_64 CRYPTO_TWOFISH_COMMON CRYPTO_TWOFISH_X86_64 CRYPTO_TWOFISH_X86_64_3WAY CRYPTO_USER CRYPTO_USER_API CRYPTO_USER_API_AEAD CRYPTO_USER_API_ENABLE_OBSOLETE CRYPTO_USER_API_HASH CRYPTO_USER_API_RNG CRYPTO_USER_API_SKCIPHER CRYPTO_WP512 CRYPTO_XCBC CRYPTO_XCTR CRYPTO_XTS CRYPTO_XXHASH CRYPTO_ZSTD CUSE CYPRESS_FIRMWARE DAMON DAMON_PADDR DAMON_RECLAIM DAMON_VADDR DAX DCA DCB DEFAULT_CODEL DEVICE_MIGRATION DEVICE_PRIVATE DEV_COREDUMP DEV_DAX DLN2_ADC DMABUF_HEAPS DMABUF_HEAPS_CMA DMABUF_HEAPS_SYSTEM DMABUF_MOVE_NOTIFY DMA_CMA DMA_ENGINE_RAID 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_AUX_BRIDGE DRM_BOCHS DRM_BRIDGE DRM_BUDDY DRM_CIRRUS_QEMU DRM_CLIENT DRM_CLIENT_DEFAULT_FBDEV DRM_CLIENT_LIB DRM_CLIENT_SELECTION DRM_CLIENT_SETUP DRM_FBDEV_EMULATION ENCRYPTED_KEYS FSCACHE FUSE_FS GPIOLIB HAMRADIO HID_DRAGONRISE IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT IOSCHED_BFQ LIBNVDIMM MAC80211 MAC80211_DEBUGFS MAC80211_LEDS MCORE2 MEDIA_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MMC MTD NET_CLS_U32 NET_SCH_DEFAULT PARTITION_ADVANCED RFKILL SERIAL_DEV_BUS TLS TLS_DEVICE TRANSPARENT_HUGEPAGE TRUSTED_KEYS USB_GADGET USB_PHY VLAN_8021Q WANT_COMPAT_NETLINK_MESSAGES WEXT_CORE WIRELESS WLAN WLAN_VENDOR_ATH X86_X32_ABI ZONE_DEVICE] disabling configs for [BUG LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing current HEAD 08215f5486ec4d7c39cf14987ffb133e1e1f6c10 testing commit 08215f5486ec4d7c39cf14987ffb133e1e1f6c10 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b4f9e1d654feabdf898ec77cc54fbea2fb8ed2c9e8c11169e68683c46e33f44f all runs: crashed: KASAN: use-after-free Read in check_dirent representative crash: KASAN: use-after-free Read in check_dirent, types: [KASAN] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 5h1m0.050778952s (build: 3h24m5.630349934s, test: 54m44.70142891s) crash still not fixed or there were kernel test errors commit msg: Merge tag 'kbuild-fixes-v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild crash: KASAN: use-after-free Read in check_dirent ================================================================== BUG: KASAN: use-after-free in check_dirent+0x26af/0x2f30 fs/bcachefs/fsck.c:2300 Read of size 1 at addr ffff88815c283140 by task syz.0.16/5377 CPU: 0 UID: 0 PID: 5377 Comm: syz.0.16 Not tainted 6.16.0-rc1-syzkaller #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x5a/0x90 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xcd/0x680 mm/kasan/report.c:521 kasan_report+0xe0/0x110 mm/kasan/report.c:634 check_dirent+0x26af/0x2f30 fs/bcachefs/fsck.c:2300 bch2_check_dirents+0x388/0x770 fs/bcachefs/fsck.c:2326 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:485 [inline] __bch2_run_recovery_passes+0x490/0xad0 fs/bcachefs/recovery_passes.c:540 bch2_run_recovery_passes+0x26c/0x320 fs/bcachefs/recovery_passes.c:611 bch2_fs_recovery+0x146d/0x3810 fs/bcachefs/recovery.c:989 bch2_fs_start+0x98e/0xe50 fs/bcachefs/super.c:1203 bch2_fs_get_tree+0xc7e/0x1810 fs/bcachefs/fs.c:2489 vfs_get_tree+0x88/0x240 fs/super.c:1802 do_new_mount fs/namespace.c:3885 [inline] path_mount+0x8b8/0x1ab0 fs/namespace.c:4209 do_mount fs/namespace.c:4222 [inline] __do_sys_mount fs/namespace.c:4433 [inline] __se_sys_mount fs/namespace.c:4410 [inline] __x64_sys_mount+0x20f/0x280 fs/namespace.c:4410 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x6d/0x310 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f51d418e84a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f51d4fb4e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f51d4fb4ef0 RCX: 00007f51d418e84a RDX: 0000400000000000 RSI: 0000400000000040 RDI: 00007f51d4fb4eb0 RBP: 0000400000000000 R08: 00007f51d4fb4ef0 R09: 0000000001000001 R10: 0000000001000001 R11: 0000000000000246 R12: 0000400000000040 R13: 00007f51d4fb4eb0 R14: 000000000000595c R15: 0000400000000140 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x3 pfn:0x15c283 head: order:5 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x100000000000040(head|node=0|zone=2) page_type: f8(unknown) raw: 0100000000000000 ffffea000570a001 dead000000000122 dead000000000400 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 head: 0100000000000040 0000000000000000 dead000000000122 0000000000000000 head: 0000000000000000 0000000000000000 00000001f8000000 0000000000000000 head: 0100000000000005 ffffea000570a001 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000020 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 5, migratetype Unmovable, gfp_mask 0x42800(GFP_NOWAIT|__GFP_COMP), pid 5474, tgid 5474 (bch-reclaim/loo), ts 113963438002, free_ts 113931723604 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x168/0x1d0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x113a/0x3b50 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x20c/0x470 mm/page_alloc.c:4959 __alloc_pages_noprof+0xb/0x1b0 mm/page_alloc.c:4993 __alloc_pages_node_noprof include/linux/gfp.h:284 [inline] alloc_pages_node_noprof include/linux/gfp.h:311 [inline] ___kmalloc_large_node+0x87/0x1a0 mm/slub.c:4272 __kmalloc_large_node_noprof+0x18/0xc0 mm/slub.c:4300 __do_kmalloc_node mm/slub.c:4316 [inline] __kvmalloc_node_noprof+0x4bd/0x660 mm/slub.c:5015 btree_bounce_alloc+0x109/0x1f0 fs/bcachefs/btree_io.c:127 btree_node_sort+0x3c1/0x14c0 fs/bcachefs/btree_io.c:326 bch2_btree_post_write_cleanup fs/bcachefs/btree_io.c:2594 [inline] bch2_btree_post_write_cleanup+0x107/0x810 fs/bcachefs/btree_io.c:2568 bch2_btree_node_write_trans+0x215/0x6a0 fs/bcachefs/btree_io.c:2663 btree_node_write_if_need fs/bcachefs/btree_io.h:167 [inline] __btree_node_flush+0x2a4/0x3c0 fs/bcachefs/btree_trans_commit.c:255 journal_flush_pins.constprop.0+0x33e/0x980 fs/bcachefs/journal_reclaim.c:598 __bch2_journal_reclaim+0x611/0xca0 fs/bcachefs/journal_reclaim.c:726 bch2_journal_reclaim_thread+0xf8/0x470 fs/bcachefs/journal_reclaim.c:768 kthread+0x35d/0x6a0 kernel/kthread.c:464 page last free pid 5377 tgid 5376 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_pages_ok+0x736/0x1070 mm/page_alloc.c:1424 __folio_put+0x257/0x350 mm/swap.c:112 btree_bounce_free fs/bcachefs/btree_io.c:115 [inline] btree_node_sort+0xe97/0x14c0 fs/bcachefs/btree_io.c:383 bch2_btree_post_write_cleanup fs/bcachefs/btree_io.c:2594 [inline] bch2_btree_post_write_cleanup+0x107/0x810 fs/bcachefs/btree_io.c:2568 bch2_btree_node_prep_for_write+0x2af/0x4a0 fs/bcachefs/btree_trans_commit.c:95 bch2_trans_lock_write+0x52c/0x9f0 fs/bcachefs/btree_trans_commit.c:131 do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:847 [inline] __bch2_trans_commit+0x1eb8/0x7c30 fs/bcachefs/btree_trans_commit.c:1079 bch2_trans_commit fs/bcachefs/btree_update.h:242 [inline] check_dirent+0xeb3/0x2f30 fs/bcachefs/fsck.c:2295 bch2_check_dirents+0x388/0x770 fs/bcachefs/fsck.c:2326 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:485 [inline] __bch2_run_recovery_passes+0x490/0xad0 fs/bcachefs/recovery_passes.c:540 bch2_run_recovery_passes+0x26c/0x320 fs/bcachefs/recovery_passes.c:611 bch2_fs_recovery+0x146d/0x3810 fs/bcachefs/recovery.c:989 bch2_fs_start+0x98e/0xe50 fs/bcachefs/super.c:1203 bch2_fs_get_tree+0xc7e/0x1810 fs/bcachefs/fs.c:2489 vfs_get_tree+0x88/0x240 fs/super.c:1802 do_new_mount fs/namespace.c:3885 [inline] path_mount+0x8b8/0x1ab0 fs/namespace.c:4209 Memory state around the buggy address: ffff88815c283000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88815c283080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88815c283100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88815c283180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88815c283200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== done bcachefs (loop0): resume_logged_ops... done bcachefs (loop0): delete_dead_inodes... done bcachefs (loop0): going read-only bcachefs (loop0): finished waiting for writes to stop bcachefs (loop0): flushing journal and stopping allocators, journal seq 28 bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 28 bcachefs (loop0): clean shutdown complete, journal seq 29 bcachefs (loop0): done going read-only, filesystem not clean bcachefs (loop0): done starting filesystem syz.0.16 (5377) used greatest stack depth: 18512 bytes left