ci2 starts bisection 2025-02-10 03:36:53.246235608 +0000 UTC m=+202050.533708142 bisecting fixing commit since 75cefdf153f582f9d55ff4f9b55778dc95d55f60 building syzkaller on 95ed9ece851c5ce0f8db8fbe8c852457b4c36a85 ensuring issue is reproducible on original commit 75cefdf153f582f9d55ff4f9b55778dc95d55f60 testing commit 75cefdf153f582f9d55ff4f9b55778dc95d55f60 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 03d1f0b03c062370347fcc7040f0ac080f21bc6f7821acd16de5559e414bc61b all runs: crashed: possible deadlock in queue_stack_map_push_elem representative crash: possible deadlock in queue_stack_map_push_elem, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 75cefdf153f582f9d55ff4f9b55778dc95d55f60 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 22609689da3f170a229660d9d19d97f2bd03e45a721aa11c1ff1bc5444e8e532 all runs: crashed: possible deadlock in queue_stack_map_push_elem representative crash: possible deadlock in queue_stack_map_push_elem, types: [LOCKDEP] the bug reproduces without the instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed kconfig minimization: base=3824 full=7457 leaves diff=1987 split chunks (needed=false): <1987> split chunk #0 of len 1987 into 5 parts testing without sub-chunk 1/5 disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 75cefdf153f582f9d55ff4f9b55778dc95d55f60 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5587593b53d8178d98586af4ab8101ec0fc638ff6f2d3049bbc5d58570d969f5 all runs: crashed: possible deadlock in queue_stack_map_push_elem representative crash: possible deadlock in queue_stack_map_push_elem, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [HANG LEAK UBSAN BUG KASAN ATOMIC_SLEEP], they are not needed testing commit 75cefdf153f582f9d55ff4f9b55778dc95d55f60 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c3e57ad344d1c612093c951c5028c703f8a20a1c2839981bf2ccf58aecfa98f3 all runs: crashed: possible deadlock in queue_stack_map_push_elem representative crash: possible deadlock in queue_stack_map_push_elem, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 75cefdf153f582f9d55ff4f9b55778dc95d55f60 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 85549affc65df6d8c23982b9e1babb3ca412e650bd57da6ad72b15accf3fdad3 all runs: crashed: possible deadlock in queue_stack_map_push_elem representative crash: possible deadlock in queue_stack_map_push_elem, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 75cefdf153f582f9d55ff4f9b55778dc95d55f60 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 302610ca6dfbd7036c14105d03e5a53883d6853f13d99bb869754ff9f66b5866 all runs: crashed: possible deadlock in queue_stack_map_push_elem representative crash: possible deadlock in queue_stack_map_push_elem, 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 75cefdf153f582f9d55ff4f9b55778dc95d55f60 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 259bb5fb7819332c471c9b31304921a22f429b5d1022b29da85ef60a05804696 all runs: OK false negative chance: 0.000 minimized to 395 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DVB_CORE EXTCON FB GPIOLIB HID_ZEROPLUS I2C_MUX IIO IRQ_REMAP KVM KVM_INTEL LIBNVDIMM MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_VIPERBOARD PARPORT PCCARD PCMCIA PHONET RADIO_ADAPTERS RADIO_SI470X RADIO_SI4713 RC_CORE RFKILL SND SOUND SPI SSB TAP TUN USB_AMD5536UDC USB_ATM USB_CONFIGFS USB_CONFIGFS_F_UAC1 USB_CONFIGFS_F_UAC1_LEGACY USB_CONFIGFS_F_UAC2 USB_CONFIGFS_F_UVC USB_CONFIGFS_MASS_STORAGE USB_CONFIGFS_NCM USB_CONFIGFS_OBEX USB_CONFIGFS_PHONET USB_CONFIGFS_RNDIS USB_CONFIGFS_SERIAL USB_CXACRU USB_CYPRESS_CY7C63 USB_CYTHERM USB_DSBR USB_DUMMY_HCD USB_DWC2 USB_DWC2_HOST USB_DWC2_PCI USB_DWC3 USB_DWC3_GADGET USB_DWC3_OF_SIMPLE USB_DWC3_PCI USB_DWC3_ULPI 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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_STK1160_COMMON 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_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 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_X2APIC X86_X32_ABI XARRAY_MULTI 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 ZBUD ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZBUD] disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed determining the merge base between 75cefdf153f582f9d55ff4f9b55778dc95d55f60 and a64dcfb451e254085a7daee5fe51bf22959d52d3 830b3c68c1fb1e9176028d02ef86f3cf76aa2476/Linux 6.1 is a merge base, check if it has the bug testing commit 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b64d04a8ef73022c7344ad460ba001957e550d28719019c508e6b54108a9b23b all runs: crashed: possible deadlock in queue_stack_map_push_elem representative crash: possible deadlock in queue_stack_map_push_elem, types: [LOCKDEP] testing current HEAD a64dcfb451e254085a7daee5fe51bf22959d52d3 testing commit a64dcfb451e254085a7daee5fe51bf22959d52d3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 76348275a76a8896c19d5ca85e4c0ff41b902697ec9e6d455fdaca352562c6a0 all runs: crashed: possible deadlock in queue_stack_map_push_elem representative crash: possible deadlock in queue_stack_map_push_elem, types: [LOCKDEP] crash still not fixed/happens on the oldest tested release revisions tested: 9, total time: 1h21m46.004216882s (build: 41m30.662803128s, test: 36m34.554376757s) crash still not fixed or there were kernel test errors commit msg: Linux 6.14-rc2 crash: possible deadlock in queue_stack_map_push_elem ============================================ WARNING: possible recursive locking detected 6.14.0-rc2-syzkaller #0 Not tainted -------------------------------------------- udevd/1949 is trying to acquire lock: ffff88811c7729e0 (&qs->lock){-.-.}-{2:2}, at: queue_stack_map_push_elem+0x8a/0x1c0 kernel/bpf/queue_stack_maps.c:210 but task is already holding lock: ffff88811334e9e0 (&qs->lock){-.-.}-{2:2}, at: queue_stack_map_push_elem+0x8a/0x1c0 kernel/bpf/queue_stack_maps.c:210 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&qs->lock); lock(&qs->lock); *** DEADLOCK *** May be due to missing lock nesting notation 4 locks held by udevd/1949: #0: ffff888111e8c878 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x78/0xb0 fs/file.c:1192 #1: ffffffff8338b3d8 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #1: ffffffff8338b3d8 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffffffff8338b3d8 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2370 [inline] #1: ffffffff8338b3d8 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run2+0x89/0x1f0 kernel/trace/bpf_trace.c:2412 #2: ffff88811334e9e0 (&qs->lock){-.-.}-{2:2}, at: queue_stack_map_push_elem+0x8a/0x1c0 kernel/bpf/queue_stack_maps.c:210 #3: ffffffff8338b3d8 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #3: ffffffff8338b3d8 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #3: ffffffff8338b3d8 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2370 [inline] #3: ffffffff8338b3d8 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run2+0x89/0x1f0 kernel/trace/bpf_trace.c:2412 stack backtrace: CPU: 1 UID: 0 PID: 1949 Comm: udevd Not tainted 6.14.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x9f/0x100 lib/dump_stack.c:120 print_deadlock_bug+0x2e9/0x330 kernel/locking/lockdep.c:3039 check_deadlock kernel/locking/lockdep.c:3091 [inline] validate_chain kernel/locking/lockdep.c:3893 [inline] __lock_acquire+0x11c6/0x2780 kernel/locking/lockdep.c:5228 lock_acquire+0xe7/0x260 kernel/locking/lockdep.c:5851 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x5d/0x90 kernel/locking/spinlock.c:162 queue_stack_map_push_elem+0x8a/0x1c0 kernel/bpf/queue_stack_maps.c:210 ___bpf_prog_run+0x5aa/0x2070 kernel/bpf/core.c:2015 __bpf_prog_run32+0xb7/0xe0 kernel/bpf/core.c:2256 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2371 [inline] bpf_trace_run2+0x102/0x1f0 kernel/trace/bpf_trace.c:2412 __traceiter_contention_begin+0x27/0x40 include/trace/events/lock.h:95 __do_trace_contention_begin include/trace/events/lock.h:95 [inline] trace_contention_begin include/trace/events/lock.h:95 [inline] __pv_queued_spin_lock_slowpath+0x3ec/0x460 kernel/locking/qspinlock.c:402 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:577 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x9a/0xa0 kernel/locking/spinlock_debug.c:116 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0x69/0x90 kernel/locking/spinlock.c:162 queue_stack_map_push_elem+0x8a/0x1c0 kernel/bpf/queue_stack_maps.c:210 ___bpf_prog_run+0x5aa/0x2070 kernel/bpf/core.c:2015 __bpf_prog_run32+0xb7/0xe0 kernel/bpf/core.c:2256 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2371 [inline] bpf_trace_run2+0x102/0x1f0 kernel/trace/bpf_trace.c:2412 __traceiter_contention_begin+0x27/0x40 include/trace/events/lock.h:95 __do_trace_contention_begin include/trace/events/lock.h:95 [inline] trace_contention_begin include/trace/events/lock.h:95 [inline] __mutex_lock_common kernel/locking/mutex.c:587 [inline] __mutex_lock+0x8a0/0xa10 kernel/locking/mutex.c:730 fdget_pos+0x78/0xb0 fs/file.c:1192 class_fd_pos_constructor include/linux/file.h:85 [inline] __do_sys_getdents64 fs/readdir.c:392 [inline] __se_sys_getdents64+0x27/0x120 fs/readdir.c:389 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x7e/0x170 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fc032470910 Code: 87 43 04 ff c8 7e 08 48 89 ef e8 4d 0e fc ff 4c 89 e0 5b 5d 41 5c c3 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 e9 74 0f 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffd0bbb1838 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 000055e4ceff7710 RCX: 00007fc032470910 RDX: 0000000000008000 RSI: 000055e4ceff7740 RDI: 000000000000000f RBP: 000055e4ceff7714 R08: 000055e4ceff7710 R09: 0000000001000000 R10: 0000000000000812 R11: 0000000000000293 R12: 000055e4cf0a5230 R13: fffffffffffffe60 R14: 0000000000000002 R15: 000055e4ceff7740