ci starts bisection 2024-12-05 03:19:36.700807993 +0000 UTC m=+9834.038301390 bisecting fixing commit since 68b59730459e5d1fe4e0bbeb04ceb9df0f002270 building syzkaller on ee4e11c8201e61ce6155059daa9330824f9fad16 ensuring issue is reproducible on original commit 68b59730459e5d1fe4e0bbeb04ceb9df0f002270 testing commit 68b59730459e5d1fe4e0bbeb04ceb9df0f002270 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d13865f8fd69fa4472d5486ca8b29a34300737b07dcec54ba2d76d72e42f3edf run #0: crashed: possible deadlock in assign_fw run #1: crashed: possible deadlock in assign_fw run #2: crashed: possible deadlock in assign_fw run #3: crashed: possible deadlock in assign_fw run #4: crashed: possible deadlock in assign_fw run #5: crashed: possible deadlock in assign_fw run #6: crashed: possible deadlock in assign_fw run #7: crashed: possible deadlock in assign_fw run #8: crashed: possible deadlock in assign_fw run #9: crashed: possible deadlock in assign_fw run #10: crashed: possible deadlock in assign_fw run #11: crashed: possible deadlock in assign_fw run #12: crashed: possible deadlock in assign_fw run #13: crashed: possible deadlock in assign_fw run #14: crashed: possible deadlock in assign_fw run #15: crashed: possible deadlock in assign_fw run #16: crashed: possible deadlock in assign_fw run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in assign_fw, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [HANG LEAK UBSAN BUG KASAN ATOMIC_SLEEP], they are not needed testing commit 68b59730459e5d1fe4e0bbeb04ceb9df0f002270 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a454294d10908e4cfddd7b26402e4c4b5ff4fb1e0e0b745fb9cf62682ce5be65 all runs: crashed: possible deadlock in assign_fw representative crash: possible deadlock in assign_fw, types: [LOCKDEP] the bug reproduces without the instrumentation disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed kconfig minimization: base=4045 full=8063 leaves diff=1998 split chunks (needed=false): <1998> split chunk #0 of len 1998 into 5 parts testing without sub-chunk 1/5 disabling configs for [LEAK UBSAN BUG KASAN ATOMIC_SLEEP HANG], they are not needed testing commit 68b59730459e5d1fe4e0bbeb04ceb9df0f002270 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 67ec92950777811e35488f737036e2d220610f37bf710805341c5c3df4f80b3f all runs: crashed: possible deadlock in assign_fw representative crash: possible deadlock in assign_fw, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 68b59730459e5d1fe4e0bbeb04ceb9df0f002270 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 53817caa677e0961d19a37b243f9adba91788374b1fe0659e7f516ed2f85a121 all runs: OK false negative chance: 0.000 testing without sub-chunk 3/5 disabling configs for [LEAK UBSAN BUG KASAN ATOMIC_SLEEP HANG], they are not needed testing commit 68b59730459e5d1fe4e0bbeb04ceb9df0f002270 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: eb28398f1640bd4769ac389a2b4e55eb176daba6800cde0478709af053b74507 all runs: crashed: possible deadlock in assign_fw representative crash: possible deadlock in assign_fw, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LEAK UBSAN BUG KASAN ATOMIC_SLEEP HANG], they are not needed testing commit 68b59730459e5d1fe4e0bbeb04ceb9df0f002270 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ff7d5fb37a0cd1de9722b4dc3ef39749e3db160530fcbb33c9458d42e36123c3 all runs: crashed: possible deadlock in assign_fw representative crash: possible deadlock in assign_fw, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [HANG LEAK UBSAN BUG KASAN ATOMIC_SLEEP], they are not needed testing commit 68b59730459e5d1fe4e0bbeb04ceb9df0f002270 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f78eb6d7201f6612013fa376ee43c843c54db6c573d42b6e1570007afb59b196 all runs: OK false negative chance: 0.000 minimized to 798 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_ZSTD DAX DLM DRM DRM_BRIDGE DRM_GEM_SHMEM_HELPER 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 DRM_TTM_HELPER DRM_UDL DRM_VGEM DRM_VIRTIO_GPU DRM_VIRTIO_GPU_KMS DRM_VKMS DRM_VMWGFX 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USB_SERIAL_DIGI_ACCELEPORT USB_SERIAL_EDGEPORT USB_SERIAL_EDGEPORT_TI USB_SERIAL_EMPEG USB_SERIAL_F81232 USB_SERIAL_F8153X USB_SERIAL_FTDI_SIO USB_SERIAL_GARMIN USB_SERIAL_GENERIC USB_SERIAL_IPAQ USB_SERIAL_IPW USB_SERIAL_IR USB_SERIAL_IUU USB_SERIAL_KEYSPAN USB_SERIAL_KEYSPAN_PDA USB_SERIAL_KLSI USB_SERIAL_KOBIL_SCT USB_SERIAL_MCT_U232 USB_SERIAL_METRO USB_SERIAL_MOS7715_PARPORT USB_SERIAL_MOS7720 USB_SERIAL_MOS7840 USB_SERIAL_MXUPORT USB_SERIAL_NAVMAN USB_SERIAL_OMNINET USB_SERIAL_OPTICON USB_SERIAL_OPTION USB_SERIAL_OTI6858 USB_SERIAL_PL2303 USB_SERIAL_QCAUX USB_SERIAL_QT2 USB_SERIAL_QUALCOMM USB_SERIAL_SAFE USB_SERIAL_SIERRAWIRELESS USB_SERIAL_SIMPLE USB_SERIAL_SPCP8X5 USB_SERIAL_SSU100 USB_SERIAL_SYMBOL USB_SERIAL_TI USB_SERIAL_UPD78F0730 USB_SERIAL_VISOR USB_SERIAL_WHITEHEAT USB_SERIAL_WISHBONE USB_SERIAL_WWAN USB_SERIAL_XR USB_SERIAL_XSENS_MT USB_SEVSEG USB_SI470X USB_SI4713 USB_SIERRA_NET USB_SISUSBVGA USB_SL811_CS USB_SL811_HCD USB_SL811_HCD_ISO USB_SNP_CORE USB_SPEEDTOUCH USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_UAS USB_UEAGLEATM USB_ULPI_BUS USB_USBNET USB_USS720 USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_VIDEO_CLASS USB_VIDEO_CLASS_INPUT_EVDEV USB_VL600 USB_WDM USB_XHCI_DBGCAP USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USERMODE_DRIVER USER_RETURN_NOTIFIER UVC_COMMON U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VDPA_USER VETH VFIO VFIO_DEVICE_CDEV VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_PCI_MMAP VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_TASK VHOST_VDPA VHOST_VSOCK VIDEO VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOMODE_HELPERS VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_FS VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WAN WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_PURELIFI WLAN_VENDOR_SILABS X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK X86_X2APIC X86_X32_ABI XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZONE_DEVICE ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZSMALLOC] disabling configs for [HANG LEAK UBSAN BUG KASAN ATOMIC_SLEEP], they are not needed testing current HEAD feffde684ac29a3b7aec82d2df850fbdbdee55e4 testing commit feffde684ac29a3b7aec82d2df850fbdbdee55e4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 413cb9751e30fd0d82a659dad49553985c85be4420812718d3396a5b1ae2b9cf all runs: crashed: possible deadlock in assign_fw representative crash: possible deadlock in assign_fw, types: [LOCKDEP] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 2h23m39.55388892s (build: 1h7m13.909395862s, test: 1h2m4.921586116s) crash still not fixed or there were kernel test errors commit msg: Merge tag 'for-6.13-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux crash: possible deadlock in assign_fw RAX: ffffffffffffffda RBX: 00007f8f48d06038 RCX: 00007f8f48b75b59 RDX: 0000000000000000 RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007f8f499000a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 000000000000006e R14: 00007f8f48d06038 R15: 00007fffd8f88468 ============================================ WARNING: possible recursive locking detected 6.13.0-rc1-syzkaller #0 Not tainted -------------------------------------------- syz.0.15/3803 is trying to acquire lock: ffffffff84327308 (fw_lock){+.+.}-{4:4}, at: assign_fw+0x27/0x2a0 drivers/base/firmware_loader/main.c:700 but task is already holding lock: ffffffff84327308 (fw_lock){+.+.}-{4:4}, at: device_cache_fw_images drivers/base/firmware_loader/main.c:1548 [inline] ffffffff84327308 (fw_lock){+.+.}-{4:4}, at: fw_pm_notify+0xd6/0x150 drivers/base/firmware_loader/main.c:1601 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(fw_lock); lock(fw_lock); *** DEADLOCK *** May be due to missing lock nesting notation 5 locks held by syz.0.15/3803: #0: ffffffff84311498 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x2c/0x120 drivers/char/misc.c:129 #1: ffffffff841099b8 (system_transition_mutex){+.+.}-{4:4}, at: lock_system_sleep+0x2a/0x40 kernel/power/main.c:56 #2: ffffffff8410f4c0 ((pm_chain_head).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain_robust+0x40/0xc0 kernel/notifier.c:344 #3: ffffffff84327308 (fw_lock){+.+.}-{4:4}, at: device_cache_fw_images drivers/base/firmware_loader/main.c:1548 [inline] #3: ffffffff84327308 (fw_lock){+.+.}-{4:4}, at: fw_pm_notify+0xd6/0x150 drivers/base/firmware_loader/main.c:1601 #4: ffffffff843268c0 (dpm_list_mtx){+.+.}-{4:4}, at: device_pm_lock drivers/base/power/main.c:113 [inline] #4: ffffffff843268c0 (dpm_list_mtx){+.+.}-{4:4}, at: dpm_for_each_dev+0x24/0x70 drivers/base/power/main.c:1961 stack backtrace: CPU: 0 UID: 0 PID: 3803 Comm: syz.0.15 Not tainted 6.13.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xa3/0x100 lib/dump_stack.c:120 print_deadlock_bug+0x244/0x260 kernel/locking/lockdep.c:3037 check_deadlock kernel/locking/lockdep.c:3089 [inline] validate_chain kernel/locking/lockdep.c:3891 [inline] __lock_acquire+0x10c4/0x2570 kernel/locking/lockdep.c:5226 lock_acquire+0xeb/0x270 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0xaa/0x9b0 kernel/locking/mutex.c:735 assign_fw+0x27/0x2a0 drivers/base/firmware_loader/main.c:700 _request_firmware+0x368/0x480 drivers/base/firmware_loader/main.c:944 request_firmware drivers/base/firmware_loader/main.c:992 [inline] cache_firmware drivers/base/firmware_loader/main.c:1330 [inline] __async_dev_cache_fw_image+0x4c/0x140 drivers/base/firmware_loader/main.c:1444 async_schedule_node_domain+0x7f/0xb0 kernel/async.c:221 async_schedule_domain include/linux/async.h:72 [inline] dev_cache_fw_image+0x165/0x1a0 drivers/base/firmware_loader/main.c:1500 dpm_for_each_dev+0x47/0x70 drivers/base/power/main.c:1963 device_cache_fw_images drivers/base/firmware_loader/main.c:1550 [inline] fw_pm_notify+0xee/0x150 drivers/base/firmware_loader/main.c:1601 notifier_call_chain+0x6d/0x100 kernel/notifier.c:85 notifier_call_chain_robust kernel/notifier.c:120 [inline] blocking_notifier_call_chain_robust+0x60/0xc0 kernel/notifier.c:345 pm_notifier_call_chain_robust+0x1b/0x40 kernel/power/main.c:102 snapshot_open+0x108/0x150 kernel/power/user.c:77 misc_open+0xf9/0x120 drivers/char/misc.c:165 chrdev_open+0x1d8/0x230 fs/char_dev.c:414 do_dentry_open+0x290/0x540 fs/open.c:945 vfs_open+0x28/0xd0 fs/open.c:1075 do_open fs/namei.c:3828 [inline] path_openat+0xbbc/0xdf0 fs/namei.c:3987 do_filp_open+0xc5/0x180 fs/namei.c:4014 do_sys_openat2+0x7e/0xe0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x7c/0xa0 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xa0/0x1b0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8f48b75b59 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f8f49900048 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f8f48d06038 RCX: 00007f8f48b75b59 RDX: 0000000000000000 RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007f8f499000a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 000000000000006e R14: 00007f8f48d06038 R15: 00007fffd8f88468