ci2 starts bisection 2023-07-16 13:54:16.157376548 +0000 UTC m=+148718.694313949
bisecting fixing commit since 76ba310227d2490018c271f1ecabb6c0a3212eb0
building syzkaller on 058b3a5a6a945a55767811552eb7b9f4a20307f8
ensuring issue is reproducible on original commit 76ba310227d2490018c271f1ecabb6c0a3212eb0
testing commit 76ba310227d2490018c271f1ecabb6c0a3212eb0 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d6adc188d5697b355ad567520e6b2f79f179d64a319f96c8a92359720a562682
all runs: crashed: INFO: task hung in lock_extent
representative crash: INFO: task hung in lock_extent, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing commit 76ba310227d2490018c271f1ecabb6c0a3212eb0 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 956a51f02320d7214f15358d9fe9f023228c8355016905d053213649dfae89b0
all runs: crashed: INFO: task hung in lock_extent
representative crash: INFO: task hung in lock_extent, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
kconfig minimization: base=3820 full=7523 leaves diff=1994
split chunks (needed=false): <1994>
split chunk #0 of len 1994 into 5 parts
testing without sub-chunk 1/5
testing commit 76ba310227d2490018c271f1ecabb6c0a3212eb0 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: e010788c7c28cd0a7158d1cbcb05b5219ee6237a027a6eed67ea15acf809dbc5
all runs: OK
false negative chance: 0.000
testing without sub-chunk 2/5
testing commit 76ba310227d2490018c271f1ecabb6c0a3212eb0 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: b5e27f68c3f1315525233c90a6f7f483dcd29c79af4722ef749ed29ec4e970ac
all runs: crashed: INFO: task hung in lock_extent
representative crash: INFO: task hung in lock_extent, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
testing commit 76ba310227d2490018c271f1ecabb6c0a3212eb0 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 2360fcbcf0509e002c5d1af9a9a56768110c0579d9bf914df058ba15e3d7bf18
all runs: crashed: INFO: task hung in lock_extent
representative crash: INFO: task hung in lock_extent, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
testing commit 76ba310227d2490018c271f1ecabb6c0a3212eb0 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 601da2e696caf8bebde33be8f35c28a393c0d9ed17dd0d22725e4f5864387c32
all runs: crashed: INFO: task hung in lock_extent
representative crash: INFO: task hung in lock_extent, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
testing commit 76ba310227d2490018c271f1ecabb6c0a3212eb0 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 54210daa79cd65fd24d1f985e134a84c21cea0411d5d4eacc8dd0f17940b9da4
all runs: crashed: INFO: task hung in lock_extent
representative crash: INFO: task hung in lock_extent, types: [HANG]
the chunk can be dropped
minimized to 399 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_PLATFORM_PROFILE 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 APERTURE_HELPERS AR5523 ARCH_ENABLE_MEMORY_HOTREMOVE ARCH_ENABLE_THP_MIGRATION ASM_MODVERSIONS ASYNC_CORE ASYNC_MEMCPY ASYNC_PQ ASYNC_RAID6_RECOV ASYNC_TX_DMA ASYNC_XOR ATARI_PARTITION ATA_GENERIC ATA_OVER_ETH ATH10K ATH10K_CE ATH10K_PCI ATH10K_USB ATH11K ATH6KL ATH6KL_USB ATH9K ATH9K_AHB ATH9K_BTCOEX_SUPPORT ATH9K_CHANNEL_CONTEXT ATH9K_COMMON ATH9K_COMMON_DEBUG 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 BCMA BCMA_HOST_PCI_POSSIBLE BEFS_FS BFQ_CGROUP_DEBUG BFQ_GROUP_IOSCHED BFS_FS BIG_KEYS BLK_CGROUP_RWSTAT BLK_DEBUG_FS_ZONED BLK_DEV_BSGLIB BLK_DEV_FD BLK_DEV_INTEGRITY BLK_DEV_INTEGRITY_T10 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_RDMA 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_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_CMTP BT_HCIBCM203X BT_HCIBFUSB BT_HCIBPA10X BT_HCIBTUSB BT_HCIBTUSB_BCM BT_HCIBTUSB_MTK 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_HIDP BT_HS BT_INTEL BT_LE BT_LEDS BT_MSFTEXT BT_MTK 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_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_SLCAN CAN_VCAN CAN_VXCAN CAPI_TRACE CARL9170 CARL9170_HWRNG CARL9170_LEDS CARL9170_WPC CC_HAS_ZERO_CALL_USED_REGS 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_BQ24190 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 CLS_U32_MARK CLS_U32_PERF CMA CMA_SIZE_SEL_MBYTES 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_ITU_T CRC_T10DIF 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_CFB CRYPTO_CHACHA20 CRYPTO_CHACHA20POLY1305 CRYPTO_CHACHA20_X86_64 CRYPTO_CRC32 CRYPTO_CRC32C_INTEL CRYPTO_CRC32_PCLMUL CRYPTO_CRC64_ROCKSOFT CRYPTO_CRCT10DIF CRYPTO_CRCT10DIF_PCLMUL 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_ECB CRYPTO_ECC CRYPTO_ECDH CRYPTO_ECRDSA CRYPTO_ENGINE CRYPTO_ESSIV CRYPTO_FCRYPT CRYPTO_GHASH_CLMUL_NI_INTEL CRYPTO_HCTR2 CRYPTO_KDF800108_CTR CRYPTO_KEYWRAP 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_MICHAEL_MIC CRYPTO_NHPOLY1305 CRYPTO_NHPOLY1305_AVX2 CRYPTO_NHPOLY1305_SSE2 CRYPTO_OFB 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_SHA3 CRYPTO_SHA512_SSSE3 CRYPTO_SIMD CRYPTO_SM2 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_VMAC CRYPTO_WP512 CRYPTO_XCBC CRYPTO_XCTR CRYPTO_XTS CRYPTO_XXHASH CUSE CYPRESS_FIRMWARE DAMON DAMON_DBGFS DAMON_PADDR DAMON_RECLAIM DAMON_VADDR DAX DCA DCB DEFAULT_PFIFO_FAST DEVICE_MIGRATION DEVICE_PRIVATE DEV_COREDUMP DEV_DAX DIMLIB 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_BOCHS DRM_BUDDY DRM_CIRRUS_QEMU DRM_DEBUG_MM ENCRYPTED_KEYS EXTCON FSCACHE FUSE_FS GPIOLIB HAMRADIO HID_DRAGONRISE IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT IOSCHED_BFQ ISDN ISDN_CAPI LIBNVDIMM MAC80211 MAC80211_LEDS MEDIA_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 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 WIRELESS_EXT WLAN WLAN_VENDOR_ATH X86_X32_ABI ZONE_DEVICE]
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing current HEAD 61fd484b2cf6bc8022e8e5ea6f693a9991740ac2
testing commit 61fd484b2cf6bc8022e8e5ea6f693a9991740ac2 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 6dfe79c032de9070b5bd28db720de7eafbcde5432fe12fe861d81fb151f131de
all runs: crashed: INFO: task hung in lock_extent
representative crash: INFO: task hung in lock_extent, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 3h6m33.612932433s (build: 2h13m57.668768734s, test: 50m20.426311924s)
crash still not fixed on HEAD or HEAD had kernel test errors
commit msg: Linux 6.1.38
crash: INFO: task hung in lock_extent
INFO: task syz-executor.0:1874 blocked for more than 143 seconds.
Not tainted 6.1.38-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:12552 pid:1874 ppid:1473 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x56f/0x840 kernel/sched/core.c:6554
schedule+0x50/0xb0 kernel/sched/core.c:6630
wait_on_state fs/btrfs/extent-io-tree.c:709 [inline]
wait_extent_bit+0x152/0x1c0 fs/btrfs/extent-io-tree.c:742
lock_extent+0x64/0xf0 fs/btrfs/extent-io-tree.c:1657
btrfs_page_mkwrite+0x1c7/0x630 fs/btrfs/inode.c:8463
do_page_mkwrite+0x43/0x140 mm/memory.c:2982
wp_page_shared+0x5e/0x200 mm/memory.c:3331
handle_pte_fault mm/memory.c:4994 [inline]
__handle_mm_fault mm/memory.c:5118 [inline]
handle_mm_fault+0x76f/0x14a0 mm/memory.c:5239
do_user_addr_fault arch/x86/mm/fault.c:1380 [inline]
handle_page_fault arch/x86/mm/fault.c:1471 [inline]
exc_page_fault+0x21c/0x540 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:copy_user_short_string+0xd/0x40 arch/x86/lib/copy_user_64.S:233
Code: 74 0a 89 d1 f3 a4 89 c8 0f 01 ca c3 89 d0 0f 01 ca c3 01 ca eb e7 0f 1f 80 00 00 00 00 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 <4c> 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 8a
RSP: 0018:ffffc90001e73c80 EFLAGS: 00050202
RAX: 00007fffffffefc8 RBX: 0000000000000038 RCX: 0000000000000007
RDX: 0000000000000000 RSI: ffffc90001e73ca8 RDI: 00000000200000e0
RBP: 0000000000000001 R08: 0000000000000000 R09: 00000000200000e0
R10: 0000000000000000 R11: 0000302e726f7475 R12: ffff8881067bd340
R13: 0000000000000000 R14: 00000000200000e0 R15: ffffc90001e73ca8
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
_copy_to_user+0x38/0x50 lib/usercopy.c:41
copy_to_user include/linux/uaccess.h:169 [inline]
fiemap_fill_next_extent+0xae/0x100 fs/ioctl.c:144
emit_last_fiemap_cache fs/btrfs/extent_io.c:3598 [inline]
extent_fiemap+0xed4/0x1050 fs/btrfs/extent_io.c:4129
btrfs_fiemap+0x6a/0x90 fs/btrfs/inode.c:8135
ioctl_fiemap fs/ioctl.c:219 [inline]
do_vfs_ioctl+0x362/0xc30 fs/ioctl.c:810
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl+0x49/0xb0 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5d4507c959
RSP: 002b:00007f5d45e4c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5d4519bf80 RCX: 00007f5d4507c959
RDX: 00000000200000c0 RSI: 00000000c020660b RDI: 0000000000000004
RBP: 00007f5d450d8c88 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007f5d4519bf80 R15: 00007ffe31e1b7f8
Showing all locks held in the system:
2 locks held by kworker/u4:0/9:
#0: ffff88810005c938 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x1ce/0x470 kernel/workqueue.c:2262
#1: ffffc90000053e68 ((reaper_work).work){....}-{0:0}, at: process_one_work+0x1f4/0x470 kernel/workqueue.c:2264
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8337bf08 (rcu_tasks.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_one_gp kernel/rcu/tasks.h:510 [inline]
#0: ffffffff8337bf08 (rcu_tasks.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_kthread+0x98/0x450 kernel/rcu/tasks.h:555
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8337c558 (rcu_tasks_trace.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_one_gp kernel/rcu/tasks.h:510 [inline]
#0: ffffffff8337c558 (rcu_tasks_trace.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_kthread+0x98/0x450 kernel/rcu/tasks.h:555
1 lock held by khungtaskd/27:
#0: ffffffff8337bde0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 include/trace/events/initcall.h:48
2 locks held by kworker/u4:2/50:
#0: ffff88810005c938 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x1ce/0x470 kernel/workqueue.c:2262
#1: ffffc900003bfe68 (connector_reaper_work){....}-{0:0}, at: process_one_work+0x1f4/0x470 kernel/workqueue.c:2264
2 locks held by kworker/u4:4/417:
2 locks held by getty/909:
#0: ffff888108a88898 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x1c/0x40 drivers/tty/tty_ldisc.c:244
#1: ffffc90001ad32f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x20a/0x8e0 drivers/tty/n_tty.c:2177
4 locks held by syz-executor.0/1874:
#0: ffff888177c11800 (&sb->s_type->i_mutex_key#18){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline]
#0: ffff888177c11800 (&sb->s_type->i_mutex_key#18){....}-{3:3}, at: btrfs_inode_lock+0x2e/0x70 fs/btrfs/inode.c:147
#1: ffff88810d6c5c58 (&mm->mmap_lock#2){....}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#1: ffff88810d6c5c58 (&mm->mmap_lock#2){....}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5267 [inline]
#1: ffff88810d6c5c58 (&mm->mmap_lock#2){....}-{3:3}, at: lock_mm_and_find_vma+0x21/0x120 mm/memory.c:5329
#2: ffff8881082a0530 (sb_pagefaults){....}-{0:0}, at: do_page_mkwrite+0x43/0x140 mm/memory.c:2982
#3: ffff888177c11688 (&ei->i_mmap_lock){....}-{3:3}, at: btrfs_page_mkwrite+0x13b/0x630 fs/btrfs/inode.c:8452
3 locks held by syz-executor.0/6929:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.1.38-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x7f/0xc2 lib/dump_stack.c:106
nmi_cpu_backtrace+0x13e/0x160 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x9c/0x150 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0x4d7/0x500 kernel/hung_task.c:377
kthread+0xd1/0xe0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6929 Comm: syz-executor.0 Not tainted 6.1.38-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:prepend_path+0x1/0x410 fs/d_path.c:158
Code: c7 44 24 08 ff ff ff ff eb ca 31 c0 eb dd 48 c7 c0 dc ff ff ff eb d4 e8 bd 7c 15 01 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 40 48 89 54 24 08 49 89 f7 48
RSP: 0018:ffffc9000212fca0 EFLAGS: 00000202
RAX: ffff88810277dffd RBX: 0000000000001000 RCX: 0000000000000000
RDX: ffffc9000212fcb0 RSI: ffffc9000212fcc0 RDI: ffff88810be9c410
RBP: 0000000000000ffe R08: 0000000000001000 R09: ffff88810277d000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88810277d000
R13: 0000000000000fff R14: ffff888100147000 R15: ffff8881124f8888
FS: 00007f5fc22a26c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5fb9200000 CR3: 000000010734c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
d_absolute_path+0x5a/0xa0 fs/d_path.c:233
tomoyo_get_absolute_path security/tomoyo/realpath.c:101 [inline]
tomoyo_realpath_from_path+0xb3/0x160 security/tomoyo/realpath.c:271
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_number_perm+0xfa/0x2c0 security/tomoyo/file.c:723
security_file_ioctl+0x2b/0x40 security/security.c:1554
__do_sys_ioctl fs/ioctl.c:864 [inline]
__se_sys_ioctl+0x32/0xb0 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5fc147c71b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007f5fc22a1e40 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f5fc147c71b
RDX: 0000000000000003 RSI: 0000000000004c00 RDI: 0000000000000004
RBP: 0000000000000010 R08: 0000000000000000 R09: 00000000000050e7
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f5fc22a1f3c R14: 00007f5fc22a2670 R15: 00007f5fb83ff000