ci starts bisection 2025-04-20 18:51:10.112286148 +0000 UTC m=+250838.705364854
bisecting fixing commit since 431c1646e1f86b949fa3685efc50b660a364c2b6
building syzkaller on 1eda0d1459e5ff07903ffa2f8cedf55ae7b24af0
ensuring issue is reproducible on original commit 431c1646e1f86b949fa3685efc50b660a364c2b6

testing commit 431c1646e1f86b949fa3685efc50b660a364c2b6 gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: 1549b9239624cddb2478d66a05609b25f34e3e7f3a810b18e16da3e2ab823281
all runs: crashed: INFO: task hung in page_cache_ra_unbounded
representative crash: INFO: task hung in page_cache_ra_unbounded, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 431c1646e1f86b949fa3685efc50b660a364c2b6 gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: bc2c731dbaea5e50922bda42541f4cf9a5094655ff30dcefc9ad586cef28f893
run #0: crashed: INFO: task hung in page_cache_ra_unbounded
run #1: crashed: INFO: task hung in page_cache_ra_unbounded
run #2: crashed: INFO: task hung in page_cache_ra_unbounded
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
representative crash: INFO: task hung in page_cache_ra_unbounded, types: [HANG]
kconfig minimization: base=4076 full=8137 leaves diff=2135
split chunks (needed=false): <2135>
split chunk #0 of len 2135 into 5 parts
testing without sub-chunk 1/5
testing commit 431c1646e1f86b949fa3685efc50b660a364c2b6 gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: 236c1ff36b2c03de7ed8496da1926e70a2124e6c303c4551c794743bd8f5ea9c
all runs: OK
false negative chance: 0.000
testing without sub-chunk 2/5
testing commit 431c1646e1f86b949fa3685efc50b660a364c2b6 gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: d0e4410c3be7d730e08bfe5360244404d6d0d3065dc99d510e5fa84b700d6ba6
all runs: crashed: INFO: task hung in page_cache_ra_unbounded
representative crash: INFO: task hung in page_cache_ra_unbounded, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
testing commit 431c1646e1f86b949fa3685efc50b660a364c2b6 gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: 3cf01481d2998657bc408e09e1cee1b549cbd1397b418631df2f59bd19289e1b
run #0: crashed: INFO: task hung in page_cache_ra_unbounded
run #1: crashed: INFO: task hung in page_cache_ra_unbounded
run #2: crashed: INFO: task hung in page_cache_ra_unbounded
run #3: crashed: INFO: task hung in page_cache_ra_unbounded
run #4: crashed: INFO: task hung in page_cache_ra_unbounded
run #5: crashed: INFO: task hung in page_cache_ra_unbounded
run #6: crashed: INFO: task hung in page_cache_ra_unbounded
run #7: crashed: INFO: task hung in page_cache_ra_unbounded
run #8: crashed: INFO: task hung in page_cache_ra_unbounded
run #9: crashed: INFO: task hung in page_cache_ra_unbounded
run #10: crashed: INFO: task hung in page_cache_ra_unbounded
run #11: crashed: INFO: task hung in page_cache_ra_unbounded
run #12: crashed: INFO: task hung in page_cache_ra_unbounded
run #13: crashed: INFO: task hung in page_cache_ra_unbounded
run #14: crashed: INFO: task hung in page_cache_ra_unbounded
run #15: crashed: INFO: task hung in page_cache_ra_unbounded
run #16: crashed: INFO: task hung in page_cache_ra_unbounded
run #17: crashed: INFO: task hung in page_cache_ra_unbounded
run #18: OK
run #19: OK
representative crash: INFO: task hung in page_cache_ra_unbounded, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
testing commit 431c1646e1f86b949fa3685efc50b660a364c2b6 gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: 61e9172dade5e20ae8331aa69be996c32b03a246a97e30ceb3d0386f7578e662
all runs: crashed: INFO: task hung in page_cache_ra_unbounded
representative crash: INFO: task hung in page_cache_ra_unbounded, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
testing commit 431c1646e1f86b949fa3685efc50b660a364c2b6 gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: c3ff526ed9d06a23888c4b54b06063fe79b268989ee17ae401f5216a24bd1c49
run #0: crashed: INFO: task hung in page_cache_ra_unbounded
run #1: crashed: INFO: task hung in page_cache_ra_unbounded
run #2: crashed: INFO: task hung in page_cache_ra_unbounded
run #3: crashed: INFO: task hung in page_cache_ra_unbounded
run #4: crashed: INFO: task hung in page_cache_ra_unbounded
run #5: crashed: INFO: task hung in page_cache_ra_unbounded
run #6: crashed: INFO: task hung in page_cache_ra_unbounded
run #7: crashed: INFO: task hung in page_cache_ra_unbounded
run #8: crashed: INFO: task hung in page_cache_ra_unbounded
run #9: crashed: INFO: task hung in page_cache_ra_unbounded
run #10: crashed: INFO: task hung in page_cache_ra_unbounded
run #11: crashed: INFO: task hung in page_cache_ra_unbounded
run #12: crashed: INFO: task hung in page_cache_ra_unbounded
run #13: crashed: INFO: task hung in page_cache_ra_unbounded
run #14: crashed: INFO: task hung in page_cache_ra_unbounded
run #15: crashed: INFO: task hung in page_cache_ra_unbounded
run #16: crashed: INFO: task hung in page_cache_ra_unbounded
run #17: crashed: INFO: task hung in page_cache_ra_unbounded
run #18: OK
run #19: OK
representative crash: INFO: task hung in page_cache_ra_unbounded, types: [HANG]
the chunk can be dropped
minimized to 427 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 ADDRESS_MASKING ADFS_FS AFFS_FS AFS_FS AFS_FSCACHE AF_KCM AF_RXRPC AF_RXRPC_IPV6 AIX_PARTITION AMD_SFH_HID AMIGA_PARTITION ANDROID_BINDERFS ANDROID_BINDER_IPC ANON_VMA_NAME APERTURE_HELPERS APPLE_MFI_FASTCHARGE AR5523 ARCH_ENABLE_MEMORY_HOTREMOVE ARCH_ENABLE_THP_MIGRATION ARCH_USES_PG_UNCACHED ARCH_WANT_PMD_MKWRITE ASM_MODVERSIONS ASUS_TF103C_DOCK 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_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_INITRD 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_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_CMTP 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 CAPI_TRACE CARL9170 CARL9170_HWRNG CARL9170_LEDS CARL9170_WPC 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 CLOCKSOURCE_VALIDATE_LAST_CYCLE 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 CRC32_SLICEBY8 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_CHACHA20 CRYPTO_CHACHA20POLY1305 CRYPTO_CHACHA20_X86_64 CRYPTO_CRC32 CRYPTO_CRC32C CRYPTO_CRC32C_INTEL CRYPTO_CRC32_PCLMUL CRYPTO_CRC64_ROCKSOFT CRYPTO_CRCT10DIF CRYPTO_CRCT10DIF_PCLMUL CRYPTO_CRYPTD 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_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_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_VMAC CRYPTO_WP512 CRYPTO_XCBC CRYPTO_XCTR CRYPTO_XTS CRYPTO_XXHASH CUSE CYPRESS_FIRMWARE DAMON DAMON_PADDR DAMON_RECLAIM DAMON_VADDR DAX DCA DCB DEBUG_TIMEKEEPING 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 DMA_OPS 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_DEBUG_MM DRM_DISPLAY_DP_AUX_BUS DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR ENCRYPTED_KEYS FSCACHE FUSE_FS GPIOLIB HAMRADIO HID_DRAGONRISE IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT IOSCHED_BFQ ISDN ISDN_CAPI 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 WIRELESS_EXT WLAN WLAN_VENDOR_ATH X86_X32_ABI ZONE_DEVICE]
testing current HEAD 6fea5fabd3323cd27b2ab5143263f37ff29550cb
testing commit 6fea5fabd3323cd27b2ab5143263f37ff29550cb gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: 9c449442909603cfe1d45ad075453dbb66f01c89430e406e02f9369b2c14b7ae
run #0: basic kernel testing failed: KASAN: slab-use-after-free Write in binderfs_evict_inode
run #1: crashed: INFO: task hung in page_cache_ra_order
run #2: crashed: INFO: task hung in page_cache_ra_order
run #3: crashed: INFO: task hung in page_cache_ra_order
run #4: crashed: INFO: task hung in page_cache_ra_order
run #5: crashed: INFO: task hung in page_cache_ra_order
run #6: crashed: INFO: task hung in page_cache_ra_order
run #7: crashed: INFO: task hung in page_cache_ra_order
run #8: crashed: INFO: task hung in page_cache_ra_order
run #9: crashed: INFO: task hung in page_cache_ra_order
run #10: crashed: INFO: task hung in page_cache_ra_order
run #11: crashed: INFO: task hung in page_cache_ra_order
run #12: crashed: INFO: task hung in page_cache_ra_order
run #13: crashed: INFO: task hung in page_cache_ra_order
run #14: crashed: INFO: task hung in page_cache_ra_order
run #15: crashed: INFO: task hung in page_cache_ra_order
run #16: crashed: INFO: task hung in page_cache_ra_order
run #17: crashed: INFO: task hung in page_cache_ra_order
run #18: crashed: INFO: task hung in page_cache_ra_order
run #19: crashed: INFO: task hung in page_cache_ra_order
representative crash: INFO: task hung in page_cache_ra_order, types: [HANG]
crash still not fixed/happens on the oldest tested release
reproducer is flaky (0.90 repro chance estimate)
revisions tested: 8, total time: 3h41m6.601692897s (build: 2h1m44.437209756s, test: 1h20m9.006081337s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'mm-hotfixes-stable-2025-04-19-21-24' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
crash: INFO: task hung in page_cache_ra_order
INFO: task syz.1.574:6093 blocked for more than 143 seconds.
      Not tainted 6.15.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.574       state:D stack:27632 pid:6093  tgid:6089  ppid:2959   task_flags:0x440040 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1a97/0x2b30 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x163/0x360 kernel/sched/core.c:6860
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
 __down_read_common kernel/locking/rwsem.c:1248 [inline]
 __down_read kernel/locking/rwsem.c:1261 [inline]
 down_read+0x6ff/0xa50 kernel/locking/rwsem.c:1526
 filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
 page_cache_ra_order+0x312/0xb00 mm/readahead.c:491
 do_sync_mmap_readahead+0x3b9/0x6a0 mm/filemap.c:-1
 filemap_fault+0x623/0xf60 mm/filemap.c:3403
 __do_fault+0x10f/0x290 mm/memory.c:5098
 do_read_fault mm/memory.c:5518 [inline]
 do_fault mm/memory.c:5652 [inline]
 do_pte_missing mm/memory.c:4160 [inline]
 handle_pte_fault mm/memory.c:5997 [inline]
 __handle_mm_fault mm/memory.c:6140 [inline]
 handle_mm_fault+0x1a5c/0x4a20 mm/memory.c:6309
 do_user_addr_fault arch/x86/mm/fault.c:1388 [inline]
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x2bd/0x8b0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline]
RIP: 0010:strncpy_from_user+0xa9/0x1d0 lib/strncpy_from_user.c:130
Code: 48 89 1c 24 48 83 fb 08 48 89 54 24 08 72 6b 45 31 ff 48 8b 2c 24 eb 12 4f 89 2c 3c 49 83 c7 08 48 83 c5 f8 48 83 fd 07 76 50 <4e> 8b 2c 3a 48 b8 ff fe fe fe fe fe fe fe 4c 01 e8 4d 89 ee 49 f7
RSP: 0018:ffffc90005347cb0 EFLAGS: 00050246
RAX: 00007ffffffff000 RBX: 0000000000000fe0 RCX: ffffffff838dddd3
RDX: 0000000020001000 RSI: dffffc0000000000 RDI: ffff88816b289120
RBP: 0000000000000fe0 R08: ffff88816b28a0ff R09: 1ffff1102d65141f
R10: dffffc0000000000 R11: ffffed102d651420 R12: ffff88816b289120
R13: dffffc0000000000 R14: fffffffffffffff2 R15: 0000000000000000
 getname_flags+0xe0/0x440 fs/namei.c:157
 getname include/linux/fs.h:2852 [inline]
 do_sys_openat2+0xaf/0x1a0 fs/open.c:1423
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0x20f/0x260 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fae1a379eb9
RSP: 002b:00007fae1b142038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fae1a515f80 RCX: 00007fae1a379eb9
RDX: 0000000000048882 RSI: 0000000020001000 RDI: ffffffffffffff9c
RBP: 00007fae1a3e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fae1a515f80 R15: 00007fffbcae79c8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffffffff8887ec00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8887ec00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #0: ffffffff8887ec00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
2 locks held by kworker/u8:7/942:
 #0: ffff888100089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
 #0: ffff888100089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x8a4/0x1520 kernel/workqueue.c:3319
 #1: ffffc90002887c80 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
 #1: ffffc90002887c80 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x8c4/0x1520 kernel/workqueue.c:3319
2 locks held by getty/1520:
 #0: ffff88810bb520a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x60 drivers/tty/tty_ldisc.c:243
 #1: ffffc900000632f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x505/0x1250 drivers/tty/n_tty.c:2222
1 lock held by syz.2.17/4921:
1 lock held by syz.1.574/6093:
 #0: ffff88811075d9c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
 #0: ffff88811075d9c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x312/0xb00 mm/readahead.c:491
1 lock held by syz.4.1225/7696:
 #0: ffff88811075d9c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
 #0: ffff88811075d9c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x312/0xb00 mm/readahead.c:491
1 lock held by syz.2.3212/12671:
 #0: ffff88811075d9c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
 #0: ffff88811075d9c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x312/0xb00 mm/readahead.c:491
1 lock held by syz.2.5422/17861:
 #0: ffff88811075d9c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
 #0: ffff88811075d9c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x312/0xb00 mm/readahead.c:491
2 locks held by syz-executor/20857:

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc2-syzkaller #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x196/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x353/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x104/0x210 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
 watchdog+0xbbd/0xc00 kernel/hung_task.c:437
 kthread+0x6a1/0x820 kernel/kthread.c:464
 ret_from_fork+0x32/0x60 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted 6.15.0-rc2-syzkaller #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__switch_to+0x73/0x1680 arch/x86/kernel/process_64.c:611
Code: 41 48 c7 44 24 68 65 c3 2b 88 48 c7 44 24 70 70 4f 2e 81 48 8d 4c 24 60 48 c1 e9 03 48 b8 f1 f1 f1 f1 00 f2 f2 f2 48 89 04 19 <48> b8 f2 f2 f2 00 f2 f2 f2 00 48 89 44 19 09 48 89 44 19 11 48 89
RSP: 0018:ffffc900002c78e0 EFLAGS: 00000806
RAX: f2f2f200f1f1f1f1 RBX: dffffc0000000000 RCX: 1ffff92000058f28
RDX: 0000000000000001 RSI: ffff888105e99d40 RDI: ffff888101e9d7c0
RBP: ffffc900002c7b30 R08: ffff888101e9ec7f R09: 1ffff110203d3d8f
R10: dffffc0000000000 R11: ffffed10203d3d90 R12: dffffc0000000000
R13: ffff888105e99d40 R14: ffff888101e9d7c0 R15: ffff8881f5b38c50
FS:  0000000000000000(0000) GS:ffff88826aefb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1e65703010 CR3: 0000000008686000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace: