ci2 starts bisection 2026-01-14 18:49:20.16394911 +0000 UTC m=+4252772.341072187 bisecting fixing commit since 0a805b6ea8cda0caa268b396a2e5117f3772d849 building syzkaller on d6cdfb8a765c64793bc63cf630e68fbdd0ee0974 ensuring issue is reproducible on original commit 0a805b6ea8cda0caa268b396a2e5117f3772d849 testing commit 0a805b6ea8cda0caa268b396a2e5117f3772d849 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9d3d26d615c68f814e1c00397120652f42c8ca85d527af13c65e6fa646cdfded all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit 0a805b6ea8cda0caa268b396a2e5117f3772d849 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a1da553e46546fc1709bc2ad006db2d87a65f7b937ef4eaf971fa490355f0d33 all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] the bug reproduces without the instrumentation disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed kconfig minimization: base=3913 full=7684 leaves diff=2100 split chunks (needed=false): <2100> split chunk #0 of len 2100 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 0a805b6ea8cda0caa268b396a2e5117f3772d849 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6a1e5e8f30c8dfe1db1814169dbdbc3c658049532a8add4f622638cc453089ca all runs: OK false negative chance: 0.000 testing without sub-chunk 2/5 disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit 0a805b6ea8cda0caa268b396a2e5117f3772d849 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4cbabec6a95a0776159cab778767a968622af98cb25b813b4ca9494d66c2ca5f all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, 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 0a805b6ea8cda0caa268b396a2e5117f3772d849 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2c6f03b73248e699ad35df1e259bc346c46f0c0c10cfa69baedccd405048fa2d all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing commit 0a805b6ea8cda0caa268b396a2e5117f3772d849 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4b2524d51d907f9c334fd9445a2666082634d6653f8992168586dfdac42bc793 all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 0a805b6ea8cda0caa268b396a2e5117f3772d849 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9df3323b4d630a4bb8735a2312d9acd75967d517f82dae9c7b34e7cf2323815a all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] the chunk can be dropped minimized to 420 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 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_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_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 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_DEBUG_FS_ZONED BLK_DEV_BSGLIB 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_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_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_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_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 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 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_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_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_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_BRIDGE DRM_BUDDY DRM_CIRRUS_QEMU DRM_DEBUG_MM DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_DP_AUX_BUS DRM_DP_AUX_CHARDEV DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR DRM_I915_USERPTR DRM_KMS_HELPER DRM_MIPI_DSI DRM_PANEL DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_TTM 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_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 ZONE_DEVICE] disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed determining the merge base between 0a805b6ea8cda0caa268b396a2e5117f3772d849 and c537e12daeecaecdcd322c56a5f70659d2de7bde ffc253263a1375a65fa6c9f62a893e9767fbebfa/Linux 6.6 is a merge base, check if it has the bug testing commit ffc253263a1375a65fa6c9f62a893e9767fbebfa gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 379c723617a80f8b540a29bb813fd37295d5122459ff039e880e0ad03ff218a2 all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] testing current HEAD c537e12daeecaecdcd322c56a5f70659d2de7bde testing commit c537e12daeecaecdcd322c56a5f70659d2de7bde gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 906c35143575a2ec628a09d3e3449b22acf9f8c2a82f3c246c1466ec2c405ed3 all runs: OK false negative chance: 0.000 # git bisect start c537e12daeecaecdcd322c56a5f70659d2de7bde ffc253263a1375a65fa6c9f62a893e9767fbebfa Bisecting: 98053 revisions left to test after this (roughly 17 steps) [6e95ef0258ff4ee23ae3b06bf6b00b33dbbd5ef7] Merge tag 'bpf-next-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit 6e95ef0258ff4ee23ae3b06bf6b00b33dbbd5ef7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e15191fd18b0d650208d16ce6bad38f970877342644769b49e60628c78adf064 all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] # git bisect good 6e95ef0258ff4ee23ae3b06bf6b00b33dbbd5ef7 Bisecting: 48962 revisions left to test after this (roughly 16 steps) [00c010e130e58301db2ea0cec1eadc931e1cb8cf] Merge tag 'mm-stable-2025-05-31-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit 00c010e130e58301db2ea0cec1eadc931e1cb8cf gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: cdc5bae9cbae6dc006ea18496ebb6168a9e297bf507bc55be4104e5c3f265ba3 all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] # git bisect good 00c010e130e58301db2ea0cec1eadc931e1cb8cf Bisecting: 24461 revisions left to test after this (roughly 15 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 6e95ef0258ff4ee23ae3b06bf6b00b33dbbd5ef7 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: 005a7edf5fb0875c42bf2a7e459b1e3f865695c94c68b9806790bbfadfa7a0c7 all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] # git bisect good 05a54fa773284d1a7923cdfdd8f0c8dabb98bd26 Bisecting: 12228 revisions left to test after this (roughly 14 steps) [784faa8eca8270671e0ed6d9d21f04bbb80fc5f7] Merge tag 'rust-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit 784faa8eca8270671e0ed6d9d21f04bbb80fc5f7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9e61d1e4acd74637f92aefc17f79e342ba224ed01132bb9e32695db0df4bf870 all runs: OK false negative chance: 0.000 # git bisect bad 784faa8eca8270671e0ed6d9d21f04bbb80fc5f7 Bisecting: 6267 revisions left to test after this (roughly 13 steps) [59697e061f6aec86d5738cd4752e16520f1d60dc] Merge tag 'staging-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit 59697e061f6aec86d5738cd4752e16520f1d60dc gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 85a80f38fd054ca9ccd517b18dc0516bdefbe1d4fee1651de379ba9c92dfccc7 all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] # git bisect good 59697e061f6aec86d5738cd4752e16520f1d60dc Bisecting: 3134 revisions left to test after this (roughly 12 steps) [f5f2e20b1cbc5f9ea20b372d15967b24921ede19] Merge tag 'perf-tools-fixes-for-v6.18-1-2025-11-06' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools determine whether the revision contains the guilty commit revision 00c010e130e58301db2ea0cec1eadc931e1cb8cf crashed and is reachable testing commit f5f2e20b1cbc5f9ea20b372d15967b24921ede19 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c38e723f3cf961ea4e0078c4c6c2ee1f3a0e38abfc9409b68caa287e648b11a5 all runs: OK false negative chance: 0.000 # git bisect bad f5f2e20b1cbc5f9ea20b372d15967b24921ede19 Bisecting: 1504 revisions left to test after this (roughly 11 steps) [ec714e371f22f716a04e6ecb2a24988c92b26911] Merge tag 'perf-tools-for-v6.18-1-2025-10-08' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools determine whether the revision contains the guilty commit revision 6e95ef0258ff4ee23ae3b06bf6b00b33dbbd5ef7 crashed and is reachable testing commit ec714e371f22f716a04e6ecb2a24988c92b26911 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 67e4777dbe274f0010b5d270827ab910485199286719d1c158d9f5695f18fc56 all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] # git bisect good ec714e371f22f716a04e6ecb2a24988c92b26911 Bisecting: 752 revisions left to test after this (roughly 10 steps) [250a17e8f9555f5c5207581068ebfa2aa1f540a2] Merge tag 'erofs-for-6.18-rc3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs determine whether the revision contains the guilty commit revision 05a54fa773284d1a7923cdfdd8f0c8dabb98bd26 crashed and is reachable testing commit 250a17e8f9555f5c5207581068ebfa2aa1f540a2 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 20d329375747a9851571e0e0f5a4fc0bee24b0456b1aedefb5346b912fa1e7bb all runs: OK false negative chance: 0.000 # git bisect bad 250a17e8f9555f5c5207581068ebfa2aa1f540a2 Bisecting: 375 revisions left to test after this (roughly 9 steps) [0843ba458439f38efdc14aa359c14ad0127edb01] powerpc/fadump: skip parameter area allocation when fadump is disabled determine whether the revision contains the guilty commit revision 6e95ef0258ff4ee23ae3b06bf6b00b33dbbd5ef7 crashed and is reachable testing commit 0843ba458439f38efdc14aa359c14ad0127edb01 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7b5db32bc579e3f9898334cd96ba49768b31ace4b6e9a3cee844dc6a9b77cf79 all runs: OK false negative chance: 0.000 # git bisect bad 0843ba458439f38efdc14aa359c14ad0127edb01 Bisecting: 190 revisions left to test after this (roughly 8 steps) [91b436fc925ca58625e4230f53238e955223c385] Merge tag 'v6.18-rc-part2-smb-client-fixes' of git://git.samba.org/sfrench/cifs-2.6 determine whether the revision contains the guilty commit revision 05a54fa773284d1a7923cdfdd8f0c8dabb98bd26 crashed and is reachable testing commit 91b436fc925ca58625e4230f53238e955223c385 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5cd0f3fabee30bb6767ebc3a259c8a75ecaf6bcddfdaad6cad79407cbf8f229f all runs: OK false negative chance: 0.000 # git bisect bad 91b436fc925ca58625e4230f53238e955223c385 Bisecting: 89 revisions left to test after this (roughly 7 steps) [aac31903329ba73ef24674df78252b6610cc9d60] Merge tag 'i2c-for-6.18-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux determine whether the revision contains the guilty commit revision 59697e061f6aec86d5738cd4752e16520f1d60dc crashed and is reachable testing commit aac31903329ba73ef24674df78252b6610cc9d60 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d579346896d9866142f8e56ddf4e26b7f93fd69ef75fde92e7adae15bdc12e58 all runs: OK false negative chance: 0.000 # git bisect bad aac31903329ba73ef24674df78252b6610cc9d60 Bisecting: 53 revisions left to test after this (roughly 6 steps) [fea8cdf6738a8b25fccbb7b109b440795a0892cb] net: airoha: Fix loopback mode configuration for GDM2 port determine whether the revision contains the guilty commit revision 6e95ef0258ff4ee23ae3b06bf6b00b33dbbd5ef7 crashed and is reachable testing commit fea8cdf6738a8b25fccbb7b109b440795a0892cb gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: aea8bb0063b17a852a3fa5449ff01167b3ecb0a8500d6125c26465a025830cbc all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] # git bisect good fea8cdf6738a8b25fccbb7b109b440795a0892cb Bisecting: 24 revisions left to test after this (roughly 5 steps) [5472d60c129f75282d94ae5ad072ee6dfb7c7246] Merge tag 'trace-v6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit 5472d60c129f75282d94ae5ad072ee6dfb7c7246 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2dcbbd0b778c79f8c39f854aae4ce78c9a424f0d37a01329882881cbcce358db all runs: OK false negative chance: 0.000 # git bisect bad 5472d60c129f75282d94ae5ad072ee6dfb7c7246 Bisecting: 15 revisions left to test after this (roughly 4 steps) [18a7e218cfcdca6666e1f7356533e4c988780b57] Merge tag 'net-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net determine whether the revision contains the guilty commit revision 6e95ef0258ff4ee23ae3b06bf6b00b33dbbd5ef7 crashed and is reachable testing commit 18a7e218cfcdca6666e1f7356533e4c988780b57 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 53d18895195c86b09be42b263fa846dce3684f6f92e51bd763b4e8d6c8888054 all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] # git bisect good 18a7e218cfcdca6666e1f7356533e4c988780b57 Bisecting: 7 revisions left to test after this (roughly 3 steps) [86db0c32f16c5538ddb740f54669ace8f3a1f3d7] 9p: fix /sys/fs/9p/caches overwriting itself determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit 86db0c32f16c5538ddb740f54669ace8f3a1f3d7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6e9577ab422b233924b5a1118cffed40b21895e8b1ec58536833557486014004 all runs: OK false negative chance: 0.000 # git bisect bad 86db0c32f16c5538ddb740f54669ace8f3a1f3d7 Bisecting: 3 revisions left to test after this (roughly 2 steps) [c04db81cd0288dfc68b7a0f7d09bd49b40bba451] net/9p: Fix buffer overflow in USB transport layer determine whether the revision contains the guilty commit revision 6e95ef0258ff4ee23ae3b06bf6b00b33dbbd5ef7 crashed and is reachable testing commit c04db81cd0288dfc68b7a0f7d09bd49b40bba451 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c36561b22b5f4ec38b57b183dcdb1ef4fb639819b99699b24c5b48902951d5e6 all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] # git bisect good c04db81cd0288dfc68b7a0f7d09bd49b40bba451 Bisecting: 1 revision left to test after this (roughly 1 step) [e8fe3f07a357c39d429e02ca34f740692d88967a] 9p/trans_fd: p9_fd_request: kick rx thread if EPOLLIN determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit e8fe3f07a357c39d429e02ca34f740692d88967a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 783da0b0aeb3adc3b2716abc8746bd62077ba53b70eba819df8e04034796e10f all runs: OK false negative chance: 0.000 # git bisect bad e8fe3f07a357c39d429e02ca34f740692d88967a Bisecting: 0 revisions left to test after this (roughly 0 steps) [674b56aa57f9379854cb6798c3bbcef7e7b51ab7] net/9p: fix double req put in p9_fd_cancelled determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit 674b56aa57f9379854cb6798c3bbcef7e7b51ab7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c05dac15adcb2601225d50cc6152f7f7fbb2f60e52163bb0c8592bb00cec9852 all runs: crashed: WARNING in v9fs_fid_get_acl representative crash: WARNING in v9fs_fid_get_acl, types: [WARNING] # git bisect good 674b56aa57f9379854cb6798c3bbcef7e7b51ab7 e8fe3f07a357c39d429e02ca34f740692d88967a is the first bad commit commit e8fe3f07a357c39d429e02ca34f740692d88967a Author: Oleg Nesterov Date: Tue Aug 19 18:10:13 2025 +0200 9p/trans_fd: p9_fd_request: kick rx thread if EPOLLIN p9_read_work() doesn't set Rworksched and doesn't do schedule_work(m->rq) if list_empty(&m->req_list). However, if the pipe is full, we need to read more data and this used to work prior to commit aaec5a95d59615 ("pipe_read: don't wake up the writer if the pipe is still full"). p9_read_work() does p9_fd_read() -> ... -> anon_pipe_read() which (before the commit above) triggered the unnecessary wakeup. This wakeup calls p9_pollwake() which kicks p9_poll_workfn() -> p9_poll_mux(), p9_poll_mux() will notice EPOLLIN and schedule_work(&m->rq). This no longer happens after the optimization above, change p9_fd_request() to use p9_poll_mux() instead of only checking for EPOLLOUT. Reported-by: syzbot+d1b5dace43896bc386c3@syzkaller.appspotmail.com Tested-by: syzbot+d1b5dace43896bc386c3@syzkaller.appspotmail.com Closes: https://lore.kernel.org/all/68a2de8f.050a0220.e29e5.0097.GAE@google.com/ Link: https://lore.kernel.org/all/67dedd2f.050a0220.31a16b.003f.GAE@google.com/ Co-developed-by: K Prateek Nayak Signed-off-by: K Prateek Nayak Signed-off-by: Oleg Nesterov Tested-by: K Prateek Nayak Message-ID: <20250819161013.GB11345@redhat.com> Signed-off-by: Dominique Martinet net/9p/trans_fd.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) accumulated error probability: 0.00 culprit signature: 783da0b0aeb3adc3b2716abc8746bd62077ba53b70eba819df8e04034796e10f parent signature: c05dac15adcb2601225d50cc6152f7f7fbb2f60e52163bb0c8592bb00cec9852 revisions tested: 27, total time: 6h32m12.321029803s (build: 2h48m33.214563472s, test: 3h17m14.718824369s) first good commit: e8fe3f07a357c39d429e02ca34f740692d88967a 9p/trans_fd: p9_fd_request: kick rx thread if EPOLLIN recipients (to): ["asmadeus@codewreck.org" "kprateek.nayak@amd.com" "oleg@redhat.com" "syzbot+d1b5dace43896bc386c3@syzkaller.appspotmail.com"] recipients (cc): []