ci2 starts bisection 2024-04-28 07:27:01.163669909 +0000 UTC m=+103353.572975426 bisecting fixing commit since e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 building syzkaller on 454571b6a16598f5a6e015b9fb1a04932bce7ab9 ensuring issue is reproducible on original commit e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 testing commit e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3ab6a4a6cb788049797a73d45371183be71f82501b72fc452a4f57a33f9dd8da run #0: crashed: possible deadlock in scheduler_tick run #1: crashed: possible deadlock in scheduler_tick run #2: crashed: possible deadlock in scheduler_tick run #3: crashed: possible deadlock in scheduler_tick run #4: crashed: WARNING in sock_hash_delete_elem run #5: crashed: possible deadlock in scheduler_tick run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: possible deadlock in try_to_wake_up run #8: crashed: WARNING in sock_hash_delete_elem run #9: crashed: possible deadlock in try_to_wake_up run #10: crashed: possible deadlock in scheduler_tick run #11: crashed: possible deadlock in scheduler_tick run #12: crashed: possible deadlock in scheduler_tick run #13: crashed: possible deadlock in scheduler_tick run #14: crashed: possible deadlock in try_to_wake_up run #15: crashed: possible deadlock in try_to_wake_up run #16: crashed: possible deadlock in try_to_wake_up run #17: crashed: possible deadlock in scheduler_tick run #18: crashed: possible deadlock in try_to_wake_up run #19: crashed: possible deadlock in try_to_wake_up representative crash: possible deadlock in scheduler_tick, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [LEAK UBSAN BUG KASAN ATOMIC_SLEEP HANG], they are not needed testing commit e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5ab9a148a5e9fb27d8eeac0558d2cccdf827bc09fab81ceb1545f03dfc5d2f68 run #0: crashed: inconsistent lock state in sock_hash_delete_elem run #1: crashed: possible deadlock in scheduler_tick run #2: crashed: inconsistent lock state in sock_hash_delete_elem run #3: crashed: inconsistent lock state in sock_hash_delete_elem run #4: crashed: inconsistent lock state in sock_hash_delete_elem run #5: crashed: possible deadlock in scheduler_tick run #6: crashed: possible deadlock in try_to_wake_up run #7: crashed: possible deadlock in try_to_wake_up run #8: crashed: possible deadlock in scheduler_tick run #9: crashed: possible deadlock in try_to_wake_up representative crash: inconsistent lock state in sock_hash_delete_elem, 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=3820 full=7454 leaves diff=1988 split chunks (needed=false): <1988> split chunk #0 of len 1988 into 5 parts testing without sub-chunk 1/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4124b55fa48caebb6f263b8ee6886b1a181c1b6d0f78afbc5002cbfd18270618 run #0: crashed: possible deadlock in try_to_wake_up run #1: crashed: possible deadlock in scheduler_tick run #2: crashed: possible deadlock in try_to_wake_up run #3: crashed: possible deadlock in try_to_wake_up run #4: crashed: possible deadlock in try_to_wake_up run #5: crashed: possible deadlock in try_to_wake_up run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: possible deadlock in try_to_wake_up run #8: crashed: possible deadlock in try_to_wake_up run #9: crashed: possible deadlock in scheduler_tick representative crash: possible deadlock in try_to_wake_up, 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 e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 65b4481cf6a956b831057a2e30714867283c8faf792a35c1e06442936cf8b0ec run #0: crashed: possible deadlock in scheduler_tick run #1: crashed: possible deadlock in try_to_wake_up run #2: crashed: inconsistent lock state in sock_hash_delete_elem run #3: crashed: inconsistent lock state in sock_hash_delete_elem run #4: crashed: possible deadlock in scheduler_tick run #5: crashed: possible deadlock in scheduler_tick run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: possible deadlock in try_to_wake_up run #8: crashed: possible deadlock in scheduler_tick run #9: crashed: possible deadlock in try_to_wake_up representative crash: possible deadlock in scheduler_tick, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [LEAK UBSAN BUG KASAN ATOMIC_SLEEP HANG], they are not needed testing commit e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b10931d2a0a78034f57d75d083fbbe2d6a5ab35b42e49c49c407a3bb7a8f2fbf run #0: crashed: inconsistent lock state in sock_hash_delete_elem run #1: crashed: possible deadlock in scheduler_tick run #2: crashed: possible deadlock in scheduler_tick run #3: crashed: possible deadlock in try_to_wake_up run #4: crashed: possible deadlock in try_to_wake_up run #5: crashed: possible deadlock in try_to_wake_up run #6: crashed: inconsistent lock state in sock_hash_delete_elem run #7: crashed: inconsistent lock state in sock_hash_delete_elem run #8: crashed: inconsistent lock state in sock_hash_delete_elem run #9: crashed: inconsistent lock state in sock_hash_delete_elem representative crash: inconsistent lock state in sock_hash_delete_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 e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e1b8847b382ab61c5ce0b82ee3ec34f19aa6659818124a4ffd9b1000961f69bb run #0: crashed: inconsistent lock state in sock_hash_delete_elem run #1: crashed: possible deadlock in try_to_wake_up run #2: crashed: possible deadlock in try_to_wake_up run #3: crashed: inconsistent lock state in sock_hash_delete_elem run #4: crashed: possible deadlock in scheduler_tick run #5: crashed: inconsistent lock state in sock_hash_delete_elem run #6: crashed: inconsistent lock state in sock_hash_delete_elem run #7: crashed: possible deadlock in try_to_wake_up run #8: crashed: possible deadlock in scheduler_tick run #9: crashed: no output from test machine representative crash: inconsistent lock state in sock_hash_delete_elem, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing commit e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 02c5d52828c9856ee5ada27870f45758f4791e99743575290ec8d2e994a774e0 all runs: OK false negative chance: 0.000 minimized to 396 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 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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_U132_HCD 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 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_IOMMU_TYPE1 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_VDPA VHOST_VSOCK 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_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 [LEAK UBSAN BUG KASAN ATOMIC_SLEEP HANG], they are not needed testing current HEAD f2295faba5e8249ae4082791bfc1664c88fff83a testing commit f2295faba5e8249ae4082791bfc1664c88fff83a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a3c1b1e99619397f51696e497294b3307e953ba60b795c19ea981dfb3c873911 all runs: OK false negative chance: 0.000 # git bisect start f2295faba5e8249ae4082791bfc1664c88fff83a e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 Bisecting: 349 revisions left to test after this (roughly 9 steps) [b3608fe28fab298ee2bcdde26bdaf9c179e8c69f] net: fec: Set mac_managed_pm during probe determine whether the revision contains the guilty commit revision e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 crashed and is reachable testing commit b3608fe28fab298ee2bcdde26bdaf9c179e8c69f gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b505155536a7b44f38cc10e89bf2afa887981cd9f793932114f406e8dc50979e all runs: OK false negative chance: 0.000 # git bisect bad b3608fe28fab298ee2bcdde26bdaf9c179e8c69f Bisecting: 174 revisions left to test after this (roughly 8 steps) [6ee02e35593193d25f49aed7a97f76ae1ff07a3d] ASoC: amd: yc: Revert "Fix non-functional mic on Lenovo 21J2" determine whether the revision contains the guilty commit revision e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 crashed and is reachable testing commit 6ee02e35593193d25f49aed7a97f76ae1ff07a3d gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 33ec255256c9e83e2e614deec7d25f9cadcfbc28a60b260a9cbfc74328ad1c47 run #0: crashed: inconsistent lock state in sock_hash_delete_elem run #1: crashed: inconsistent lock state in sock_hash_delete_elem run #2: crashed: inconsistent lock state in sock_hash_delete_elem run #3: crashed: inconsistent lock state in sock_hash_delete_elem run #4: crashed: possible deadlock in try_to_wake_up run #5: crashed: possible deadlock in try_to_wake_up run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: inconsistent lock state in sock_hash_delete_elem run #8: crashed: inconsistent lock state in sock_hash_delete_elem run #9: crashed: inconsistent lock state in sock_hash_delete_elem representative crash: inconsistent lock state in sock_hash_delete_elem, types: [LOCKDEP] # git bisect good 6ee02e35593193d25f49aed7a97f76ae1ff07a3d Bisecting: 87 revisions left to test after this (roughly 7 steps) [f2b85a4cc763841843de693bbd7308fe9a2c4c89] tls: fix use-after-free on failed backlog decryption determine whether the revision contains the guilty commit revision e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 crashed and is reachable testing commit f2b85a4cc763841843de693bbd7308fe9a2c4c89 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3b1c66cff02f56044716cc5bc1728c95589ebd508ba898cf789df847bc418075 run #0: crashed: possible deadlock in try_to_wake_up run #1: crashed: inconsistent lock state in sock_hash_delete_elem run #2: crashed: possible deadlock in try_to_wake_up run #3: crashed: inconsistent lock state in sock_hash_delete_elem run #4: crashed: inconsistent lock state in sock_hash_delete_elem run #5: crashed: inconsistent lock state in sock_hash_delete_elem run #6: crashed: possible deadlock in try_to_wake_up run #7: crashed: possible deadlock in scheduler_tick run #8: crashed: inconsistent lock state in sock_hash_delete_elem run #9: crashed: inconsistent lock state in sock_hash_delete_elem representative crash: possible deadlock in try_to_wake_up, types: [LOCKDEP] # git bisect good f2b85a4cc763841843de693bbd7308fe9a2c4c89 Bisecting: 43 revisions left to test after this (roughly 6 steps) [cbaac2e5488ed54833897264a5ffb2a341a9f196] net/rds: fix possible cp null dereference determine whether the revision contains the guilty commit revision 6ee02e35593193d25f49aed7a97f76ae1ff07a3d crashed and is reachable testing commit cbaac2e5488ed54833897264a5ffb2a341a9f196 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 35d2b06863668876b3d24398567346a757eec2883dc666bb4039297a73f70470 run #0: crashed: inconsistent lock state in sock_hash_delete_elem run #1: crashed: inconsistent lock state in sock_hash_delete_elem run #2: crashed: inconsistent lock state in sock_hash_delete_elem run #3: crashed: inconsistent lock state in sock_hash_delete_elem run #4: crashed: inconsistent lock state in sock_hash_delete_elem run #5: crashed: inconsistent lock state in sock_hash_delete_elem run #6: crashed: inconsistent lock state in sock_hash_delete_elem run #7: crashed: possible deadlock in try_to_wake_up run #8: crashed: possible deadlock in try_to_wake_up run #9: crashed: inconsistent lock state in sock_hash_delete_elem representative crash: inconsistent lock state in sock_hash_delete_elem, types: [LOCKDEP] # git bisect good cbaac2e5488ed54833897264a5ffb2a341a9f196 Bisecting: 21 revisions left to test after this (roughly 5 steps) [167d4b47a9bdcb01541dfa29e9f3cbb8edd3dfd2] ipv6: Fix infinite recursion in fib6_dump_done(). determine whether the revision contains the guilty commit revision 6ee02e35593193d25f49aed7a97f76ae1ff07a3d crashed and is reachable testing commit 167d4b47a9bdcb01541dfa29e9f3cbb8edd3dfd2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1090fa84a81fcdc4c715a137d8e47dd6bfbb728b520fa6eeb413b9d613dec674 all runs: OK false negative chance: 0.000 # git bisect bad 167d4b47a9bdcb01541dfa29e9f3cbb8edd3dfd2 Bisecting: 10 revisions left to test after this (roughly 4 steps) [b7d1ce2cc7192e8a037faa3f5d3ba72c25976460] net/sched: fix lockdep splat in qdisc_tree_reduce_backlog() determine whether the revision contains the guilty commit revision cbaac2e5488ed54833897264a5ffb2a341a9f196 crashed and is reachable testing commit b7d1ce2cc7192e8a037faa3f5d3ba72c25976460 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5a808feffbc0690878beec3e76209f1556b03b703ab32f83b529ef435031bd0f all runs: OK false negative chance: 0.000 # git bisect bad b7d1ce2cc7192e8a037faa3f5d3ba72c25976460 Bisecting: 5 revisions left to test after this (roughly 3 steps) [4e8447a9a3d367b5065a0b7abe101da6e0037b6e] netfilter: nf_tables: flush pending destroy work before exit_net release determine whether the revision contains the guilty commit revision f2b85a4cc763841843de693bbd7308fe9a2c4c89 crashed and is reachable testing commit 4e8447a9a3d367b5065a0b7abe101da6e0037b6e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ea2bcf0e85f0e01d7f945f907345425116c4d781d00d389edf6c77f306c5851e run #0: crashed: inconsistent lock state in sock_hash_delete_elem run #1: crashed: inconsistent lock state in sock_hash_delete_elem run #2: crashed: inconsistent lock state in sock_hash_delete_elem run #3: crashed: inconsistent lock state in sock_hash_delete_elem run #4: crashed: possible deadlock in try_to_wake_up run #5: crashed: inconsistent lock state in sock_hash_delete_elem run #6: crashed: inconsistent lock state in sock_hash_delete_elem run #7: crashed: inconsistent lock state in sock_hash_delete_elem run #8: crashed: inconsistent lock state in sock_hash_delete_elem run #9: crashed: inconsistent lock state in sock_hash_delete_elem representative crash: inconsistent lock state in sock_hash_delete_elem, types: [LOCKDEP] # git bisect good 4e8447a9a3d367b5065a0b7abe101da6e0037b6e Bisecting: 2 revisions left to test after this (roughly 2 steps) [8a57544e9285a16dce8e58f470a1b30f426812c4] vboxsf: Avoid an spurious warning if load_nls_xxx() fails determine whether the revision contains the guilty commit revision e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 crashed and is reachable testing commit 8a57544e9285a16dce8e58f470a1b30f426812c4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4269f91c9cad2463ee2c2dc84b11684af655f585c74d29ab85a33a5eeb792341 run #0: crashed: possible deadlock in try_to_wake_up run #1: crashed: inconsistent lock state in sock_hash_delete_elem run #2: crashed: inconsistent lock state in sock_hash_delete_elem run #3: crashed: inconsistent lock state in sock_hash_delete_elem run #4: crashed: inconsistent lock state in sock_hash_delete_elem run #5: crashed: inconsistent lock state in sock_hash_delete_elem run #6: crashed: inconsistent lock state in sock_hash_delete_elem run #7: crashed: inconsistent lock state in sock_hash_delete_elem run #8: crashed: inconsistent lock state in sock_hash_delete_elem run #9: crashed: inconsistent lock state in sock_hash_delete_elem representative crash: possible deadlock in try_to_wake_up, types: [LOCKDEP] # git bisect good 8a57544e9285a16dce8e58f470a1b30f426812c4 Bisecting: 0 revisions left to test after this (roughly 1 step) [55d3fe7b2b7bc354e7cbc1f7b8f98a29ccd5a366] net/sched: act_skbmod: prevent kernel-infoleak determine whether the revision contains the guilty commit revision 6ee02e35593193d25f49aed7a97f76ae1ff07a3d crashed and is reachable testing commit 55d3fe7b2b7bc354e7cbc1f7b8f98a29ccd5a366 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1045e3097bdcae5519bf1cc3258f726d93088d0c053e65d4a87436c5641b316e all runs: OK false negative chance: 0.000 # git bisect bad 55d3fe7b2b7bc354e7cbc1f7b8f98a29ccd5a366 Bisecting: 0 revisions left to test after this (roughly 0 steps) [a44770fed86515eedb5a7c00b787f847ebb134a5] bpf, sockmap: Prevent lock inversion deadlock in map delete elem determine whether the revision contains the guilty commit revision e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 crashed and is reachable testing commit a44770fed86515eedb5a7c00b787f847ebb134a5 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1759764395ff9a05cb9669d07da171d1e357edf62be08477494dfb4cd0c45914 all runs: OK false negative chance: 0.000 # git bisect bad a44770fed86515eedb5a7c00b787f847ebb134a5 a44770fed86515eedb5a7c00b787f847ebb134a5 is the first bad commit commit a44770fed86515eedb5a7c00b787f847ebb134a5 Author: Jakub Sitnicki Date: Tue Apr 2 12:46:21 2024 +0200 bpf, sockmap: Prevent lock inversion deadlock in map delete elem commit ff91059932401894e6c86341915615c5eb0eca48 upstream. syzkaller started using corpuses where a BPF tracing program deletes elements from a sockmap/sockhash map. Because BPF tracing programs can be invoked from any interrupt context, locks taken during a map_delete_elem operation must be hardirq-safe. Otherwise a deadlock due to lock inversion is possible, as reported by lockdep: CPU0 CPU1 ---- ---- lock(&htab->buckets[i].lock); local_irq_disable(); lock(&host->lock); lock(&htab->buckets[i].lock); lock(&host->lock); Locks in sockmap are hardirq-unsafe by design. We expects elements to be deleted from sockmap/sockhash only in task (normal) context with interrupts enabled, or in softirq context. Detect when map_delete_elem operation is invoked from a context which is _not_ hardirq-unsafe, that is interrupts are disabled, and bail out with an error. Note that map updates are not affected by this issue. BPF verifier does not allow updating sockmap/sockhash from a BPF tracing program today. Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface") Reported-by: xingwei lee Reported-by: yue sun Reported-by: syzbot+bc922f476bd65abbd466@syzkaller.appspotmail.com Reported-by: syzbot+d4066896495db380182e@syzkaller.appspotmail.com Signed-off-by: Jakub Sitnicki Signed-off-by: Daniel Borkmann Tested-by: syzbot+d4066896495db380182e@syzkaller.appspotmail.com Acked-by: John Fastabend Closes: https://syzkaller.appspot.com/bug?extid=d4066896495db380182e Closes: https://syzkaller.appspot.com/bug?extid=bc922f476bd65abbd466 Link: https://lore.kernel.org/bpf/20240402104621.1050319-1-jakub@cloudflare.com Signed-off-by: Greg Kroah-Hartman net/core/sock_map.c | 6 ++++++ 1 file changed, 6 insertions(+) accumulated error probability: 0.00 culprit signature: 1759764395ff9a05cb9669d07da171d1e357edf62be08477494dfb4cd0c45914 parent signature: 4269f91c9cad2463ee2c2dc84b11684af655f585c74d29ab85a33a5eeb792341 revisions tested: 18, total time: 4h36m42.180225721s (build: 1h23m13.155952792s, test: 3h7m16.865317373s) first good commit: a44770fed86515eedb5a7c00b787f847ebb134a5 bpf, sockmap: Prevent lock inversion deadlock in map delete elem recipients (to): ["daniel@iogearbox.net" "gregkh@linuxfoundation.org" "jakub@cloudflare.com" "john.fastabend@gmail.com" "syzbot+d4066896495db380182e@syzkaller.appspotmail.com"] recipients (cc): []