ci2 starts bisection 2024-05-14 19:48:23.17711151 +0000 UTC m=+71950.898259526 bisecting fixing commit since 347385861c50adc8d4801d4b899eded38a2f04cd building syzkaller on f323435486123f331122c97cd8bd4183c89d4f05 ensuring issue is reproducible on original commit 347385861c50adc8d4801d4b899eded38a2f04cd testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b3f14056fb1c6a3e92af22e91d5c46d62d8f3a2bca9d9506f7ced795035a725a all runs: crashed: WARNING in sock_map_unref representative crash: WARNING in sock_map_unref, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: de9b811ecd9e71e41a695ec0bb0f2a2acc2cacb27f49684cfae837fb2282891f all runs: OK false negative chance: 0.000 kconfig minimization: base=3820 full=7454 leaves diff=1991 split chunks (needed=false): <1991> split chunk #0 of len 1991 into 5 parts testing without sub-chunk 1/5 testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7e54b864ab9ea18030a177820d7c97599dc8db569002f9edd52246c82ece5d37 run #0: crashed: WARNING in sock_map_unref run #1: crashed: WARNING in sock_map_unref run #2: crashed: WARNING in sock_map_unref run #3: crashed: WARNING in sock_map_unref run #4: crashed: WARNING in sock_map_unref run #5: crashed: WARNING in sock_map_unref run #6: crashed: WARNING in sock_map_unref run #7: crashed: WARNING in sock_map_unref run #8: crashed: possible deadlock in scheduler_tick run #9: crashed: WARNING in sock_map_unref representative crash: WARNING in sock_map_unref, types: [WARNING] the chunk can be dropped testing without sub-chunk 2/5 testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d71ce25406221d508d3ddc181033df213e9a5789880477d3669161301e423d00 all runs: crashed: WARNING in sock_map_unref representative crash: WARNING in sock_map_unref, types: [WARNING] the chunk can be dropped testing without sub-chunk 3/5 testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 042c9d6f4114a446d65f0531101420c1f05872bca91d8c93e1ee21720140265d run #0: crashed: WARNING in sock_map_unref run #1: crashed: WARNING in sock_map_unref run #2: crashed: WARNING in sock_map_unref run #3: crashed: WARNING in sock_map_unref run #4: crashed: WARNING in sock_map_unref run #5: crashed: WARNING in sock_map_unref run #6: crashed: WARNING in sock_map_unref run #7: crashed: WARNING in sock_map_unref run #8: crashed: WARNING in sock_map_unref run #9: crashed: possible deadlock in scheduler_tick representative crash: WARNING in sock_map_unref, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 04fbe956a96f6677556db423cb4b3f604cab26b803653834a264e3e011e63a35 run #0: crashed: WARNING in sock_map_unref run #1: crashed: WARNING in sock_map_unref run #2: crashed: WARNING in sock_map_unref run #3: crashed: WARNING in sock_map_unref run #4: crashed: WARNING in sock_map_unref run #5: crashed: WARNING in sock_map_unref run #6: crashed: WARNING in sock_map_unref run #7: crashed: WARNING in sock_map_unref run #8: crashed: possible deadlock in scheduler_tick run #9: crashed: WARNING in sock_map_unref representative crash: WARNING in sock_map_unref, types: [WARNING] the chunk can be dropped testing without sub-chunk 5/5 testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 23715896e8bb9d824ea3aa4ab7e1208505b78c47ca593e6577db87d4be1be72e 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 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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] testing current HEAD 909ba1f1b4146de529469910c1bd0b1248964536 testing commit 909ba1f1b4146de529469910c1bd0b1248964536 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 09ba81ea71e378cd437d5f714c2a12fc08c3578f0c5e6f9afc2dc13bd8ee6f99 all runs: OK false negative chance: 0.000 # git bisect start 909ba1f1b4146de529469910c1bd0b1248964536 347385861c50adc8d4801d4b899eded38a2f04cd Bisecting: 271 revisions left to test after this (roughly 8 steps) [18c8cc6680ce938d0458859b6a08b4d34f7d8055] drm/client: Fully protect modes[] with dev->mode_config.mutex determine whether the revision contains the guilty commit revision 347385861c50adc8d4801d4b899eded38a2f04cd crashed and is reachable testing commit 18c8cc6680ce938d0458859b6a08b4d34f7d8055 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7c09854e6cea6677bff1be8b021c442ed43ad0b0c2f6be6d8bfd8ea3b169ac9e all runs: OK false negative chance: 0.000 # git bisect bad 18c8cc6680ce938d0458859b6a08b4d34f7d8055 Bisecting: 135 revisions left to test after this (roughly 7 steps) [bb8384b6dfbc49be230071d1e844a8741982b1ec] x86/bhi: Add BHI mitigation knob determine whether the revision contains the guilty commit revision 347385861c50adc8d4801d4b899eded38a2f04cd crashed and is reachable testing commit bb8384b6dfbc49be230071d1e844a8741982b1ec gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a5350f632a93d97e813fa50b74638b95c7a9eaa5b7ab64116b7909f4c4168e30 all runs: OK false negative chance: 0.000 # git bisect bad bb8384b6dfbc49be230071d1e844a8741982b1ec Bisecting: 67 revisions left to test after this (roughly 6 steps) [fe74ea5b8b78d96b9ba313f070b18833a4e32b32] i40e: fix i40e_count_filters() to count only active/new filters determine whether the revision contains the guilty commit revision 347385861c50adc8d4801d4b899eded38a2f04cd crashed and is reachable testing commit fe74ea5b8b78d96b9ba313f070b18833a4e32b32 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: eb5e9f6697014a2efe70000655e1a8faeeecf67b0f15b781552356c388e637e7 all runs: OK false negative chance: 0.000 # git bisect bad fe74ea5b8b78d96b9ba313f070b18833a4e32b32 Bisecting: 33 revisions left to test after this (roughly 5 steps) [38e3eaa861bde62b92e207b07a9dc595a784191f] Bluetooth: hci_event: set the conn encrypted before conn establishes determine whether the revision contains the guilty commit revision 347385861c50adc8d4801d4b899eded38a2f04cd crashed and is reachable testing commit 38e3eaa861bde62b92e207b07a9dc595a784191f gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9a111c7ad6f93fa57a96f8cc2641d1d8c7c3b894af9c12694a08b42df7072aa7 run #0: crashed: WARNING in sock_map_unref run #1: crashed: WARNING in sock_map_unref run #2: crashed: WARNING in sock_map_unref run #3: crashed: WARNING in sock_map_unref run #4: crashed: WARNING in sock_map_unref run #5: crashed: WARNING in sock_map_unref run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: WARNING in sock_map_unref run #8: crashed: WARNING in sock_map_unref run #9: crashed: WARNING in sock_map_unref representative crash: WARNING in sock_map_unref, types: [WARNING] # git bisect good 38e3eaa861bde62b92e207b07a9dc595a784191f Bisecting: 16 revisions left to test after this (roughly 4 steps) [10608161696c2768f53426642f78a42bcaaa53e8] net: phy: micrel: Fix potential null pointer dereference determine whether the revision contains the guilty commit revision 347385861c50adc8d4801d4b899eded38a2f04cd crashed and is reachable testing commit 10608161696c2768f53426642f78a42bcaaa53e8 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: efca9f37ba6125fa0e9b78186a2cbcbe341e62e2e02c13b058f12fae2cf5af6c all runs: OK false negative chance: 0.000 # git bisect bad 10608161696c2768f53426642f78a42bcaaa53e8 Bisecting: 8 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 38e3eaa861bde62b92e207b07a9dc595a784191f 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: 5cca85854e033f1447a28d7f046a9f7a96830ff6e1346a0e13da7dc1dc22479e all runs: crashed: WARNING in sock_map_unref representative crash: WARNING in sock_map_unref, types: [WARNING] # git bisect good 4e8447a9a3d367b5065a0b7abe101da6e0037b6e Bisecting: 4 revisions left to test after this (roughly 2 steps) [a44770fed86515eedb5a7c00b787f847ebb134a5] bpf, sockmap: Prevent lock inversion deadlock in map delete elem determine whether the revision contains the guilty commit revision 347385861c50adc8d4801d4b899eded38a2f04cd 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: a8fd2494f5c973a93fd5df314c6ecb4d45bf4ad91eb06e4569717a8d0e1e8460 all runs: OK false negative chance: 0.000 # git bisect bad a44770fed86515eedb5a7c00b787f847ebb134a5 Bisecting: 1 revision left to test after this (roughly 1 step) [18aae2cb87e5faa9c5bd865260ceadac60d5a6c5] netfilter: validate user input for expected length determine whether the revision contains the guilty commit revision 38e3eaa861bde62b92e207b07a9dc595a784191f crashed and is reachable testing commit 18aae2cb87e5faa9c5bd865260ceadac60d5a6c5 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8e19e386961b0189246d763af574302b633cdade392cb11ea316661b0307dce2 run #0: crashed: WARNING in sock_map_unref run #1: crashed: WARNING in sock_map_unref run #2: crashed: WARNING in sock_map_unref run #3: crashed: possible deadlock in scheduler_tick run #4: crashed: WARNING in sock_map_unref run #5: crashed: WARNING in sock_map_unref run #6: crashed: WARNING in sock_map_unref run #7: crashed: WARNING in sock_map_unref run #8: crashed: WARNING in sock_map_unref run #9: crashed: WARNING in sock_map_unref representative crash: WARNING in sock_map_unref, types: [WARNING] # git bisect good 18aae2cb87e5faa9c5bd865260ceadac60d5a6c5 Bisecting: 0 revisions left to test after this (roughly 0 steps) [8a57544e9285a16dce8e58f470a1b30f426812c4] vboxsf: Avoid an spurious warning if load_nls_xxx() fails determine whether the revision contains the guilty commit revision 18aae2cb87e5faa9c5bd865260ceadac60d5a6c5 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: 2cd2c168609f31f554511f4053febb4e093a19d8dec4a2a9d11ef9e0fff4affc run #0: crashed: WARNING in sock_map_unref run #1: crashed: WARNING in sock_map_unref run #2: crashed: WARNING in sock_map_unref run #3: crashed: WARNING in sock_map_unref run #4: crashed: WARNING in sock_map_unref run #5: crashed: possible deadlock in scheduler_tick run #6: crashed: WARNING in sock_map_unref run #7: crashed: WARNING in sock_map_unref run #8: crashed: WARNING in sock_map_unref run #9: crashed: no output from test machine representative crash: WARNING in sock_map_unref, types: [WARNING] # git bisect good 8a57544e9285a16dce8e58f470a1b30f426812c4 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: a8fd2494f5c973a93fd5df314c6ecb4d45bf4ad91eb06e4569717a8d0e1e8460 parent signature: 2cd2c168609f31f554511f4053febb4e093a19d8dec4a2a9d11ef9e0fff4affc revisions tested: 17, total time: 2h45m32.048402519s (build: 56m41.145247549s, test: 1h43m56.440568111s) 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): []