From 2b97956af60810cd382b86b9ce9aea421b889861 Mon Sep 17 00:00:00 2001 From: Nuoqi Gui Date: Fri, 4 Sep 2026 12:41:55 +0200 Subject: selftests/bpf: Test rhtab kptr cancellation semantics Resizable hash-map updates and deletions must not perform full special-field destruction in their caller context. In particular, a referenced kptr must remain attached to the allocation until the memory allocator destructor can release it safely. Add separate coverage for both affected paths. The update test stores a task kptr, replaces the ordinary value bytes with BPF_EXIST, and verifies that the kptr survived. The delete test removes an element and exchanges its kptr through the still-valid map-value pointer before the allocation is reclaimed. Both cases observe a NULL kptr when rhtab uses bpf_obj_free_fields(). They recover and release the reference after rhtab switches to cancellation semantics. Signed-off-by: Nuoqi Gui [ kkd: Split update and delete coverage and rewrote the commit log ] Signed-off-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20260904104203.345917-5-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- scripts/const_structs.checkpatch | 113 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 scripts/const_structs.checkpatch (limited to 'scripts/const_structs.checkpatch') diff --git a/scripts/const_structs.checkpatch b/scripts/const_structs.checkpatch new file mode 100644 index 000000000..6eb94fddc --- /dev/null +++ b/scripts/const_structs.checkpatch @@ -0,0 +1,113 @@ +acpi_dock_ops +address_space_operations +backlight_ops +bin_attribute +block_device_operations +bus_type +clk_ops +comedi_lrange +component_ops +ctl_table +dentry_operations +dev_pm_ops +device_type +dma_map_ops +driver_info +drm_connector_funcs +drm_encoder_funcs +drm_encoder_helper_funcs +dvb_frontend_ops +dvb_tuner_ops +ethtool_ops +extent_io_ops +fb_ops +file_lock_operations +file_operations +hv_ops +hwmon_ops +ib_device_ops +ide_dma_ops +ide_port_ops +ieee80211_ops +iio_buffer_setup_ops +inode_operations +intel_dvo_dev_ops +irq_domain_ops +item_operations +iwl_cfg +iwl_ops +kernel_param_ops +kgdb_arch +kgdb_io +kobj_type +kset_uevent_ops +lcd_ops +lock_manager_operations +machine_desc +microcode_ops +mlxsw_reg_info +mtd_ooblayout_ops +mtrr_ops +nand_controller_ops +neigh_ops +net_device_ops +nft_expr_ops +nlmsvc_binding +nvkm_device_chip +of_device_id +pci_raw_ops +phy_ops +pinconf_ops +pinctrl_ops +pinmux_ops +pipe_buf_operations +platform_hibernation_ops +platform_suspend_ops +proc_ops +proto_ops +pwm_ops +reg_default +reg_field +reg_sequence +regmap_access_table +regmap_bus +regmap_config +regmap_irq +regmap_irq_chip +regmap_irq_sub_irq_map +regmap_range +regmap_range_cfg +regulator_ops +reset_control_ops +rpc_pipe_ops +rtc_class_ops +sd_desc +sdhci_ops +seq_operations +sirfsoc_padmux +snd_ac97_build_ops +snd_pcm_ops +snd_rawmidi_ops +snd_soc_component_driver +snd_soc_dai_ops +snd_soc_ops +snd_soc_tplg_ops +soc_pcmcia_socket_ops +stacktrace_ops +sysfs_ops +tty_operations +uart_ops +usb_mon_operations +v4l2_ctrl_ops +v4l2_ioctl_ops +v4l2_subdev_core_ops +v4l2_subdev_internal_ops +v4l2_subdev_ops +v4l2_subdev_pad_ops +v4l2_subdev_video_ops +vb2_ops +vm_operations_struct +wacom_features +watchdog_ops +wd_ops +xattr_handler -- cgit v1.3.1