mirror of
https://github.com/libfuse/libfuse.git
synced 2026-07-07 14:47:41 +08:00
Darrick J. Wong
dc6ce72129
Bernd received a complaint via github that the "unmount" command in the
new fuse service API is prone to malicious symlink creation races
because the umount2 call doesn't use UMOUNT_NOFOLLOW. Therefore, if you
can trick a fuse service into asking the mount service helper to undo
the mount just after you've replaced the mount with a symlink to a
sensitive mount (e.g. /sys) then you whack a system hard.
I don't know why this unmounting functionality exists in libfuse, and
apparently Bernd doesn't like it. Since the fuse service API has not
yet been released, let's just rip out the command and pretend it never
existed.
Fixes: 5d8b9a39a1 ("mount_service: add systemd socket service mounting helper")
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
261 lines
5.1 KiB
Plaintext
261 lines
5.1 KiB
Plaintext
FUSE_3.0 {
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global:
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fuse_destroy;
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fuse_exit;
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fuse_loop;
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fuse_loop_mt;
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fuse_reply_attr;
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fuse_reply_buf;
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fuse_reply_entry;
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fuse_reply_err;
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fuse_reply_none;
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fuse_reply_readlink;
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fuse_reply_write;
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fuse_reply_xattr;
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fuse_req_userdata;
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fuse_session_destroy;
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fuse_session_exit;
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fuse_session_exited;
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fuse_session_loop;
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fuse_session_loop_mt;
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fuse_session_reset;
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fuse_session_fd;
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fuse_opt_parse;
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fuse_opt_add_opt;
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fuse_opt_add_arg;
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fuse_opt_free_args;
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fuse_opt_match;
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fuse_parse_cmdline;
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fuse_remove_signal_handlers;
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fuse_reply_create;
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fuse_reply_open;
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fuse_reply_statfs;
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fuse_set_signal_handlers;
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fuse_add_direntry;
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fuse_add_direntry_plus;
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fuse_daemonize;
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fuse_get_session;
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fuse_interrupted;
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fuse_session_new;
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fuse_main_real;
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fuse_mount;
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fuse_session_custom_io;
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fuse_session_mount;
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fuse_new;
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fuse_opt_insert_arg;
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fuse_reply_lock;
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fuse_req_interrupt_func;
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fuse_req_interrupted;
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fuse_unmount;
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fuse_session_unmount;
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fuse_fs_access;
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fuse_fs_bmap;
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fuse_fs_chmod;
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fuse_fs_chown;
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fuse_fs_create;
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fuse_fs_destroy;
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fuse_fs_flush;
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fuse_fs_fsync;
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fuse_fs_fsyncdir;
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fuse_fs_getattr;
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fuse_fs_getxattr;
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fuse_fs_init;
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fuse_fs_link;
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fuse_fs_listxattr;
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fuse_fs_lock;
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fuse_fs_mkdir;
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fuse_fs_mknod;
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fuse_fs_new;
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fuse_fs_open;
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fuse_fs_opendir;
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fuse_fs_read;
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fuse_fs_readdir;
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fuse_fs_readlink;
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fuse_fs_release;
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fuse_fs_releasedir;
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fuse_fs_removexattr;
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fuse_fs_rename;
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fuse_fs_rmdir;
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fuse_fs_setxattr;
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fuse_fs_statfs;
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fuse_fs_symlink;
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fuse_fs_truncate;
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fuse_fs_unlink;
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fuse_fs_utimens;
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fuse_fs_write;
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fuse_reply_iov;
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fuse_version;
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fuse_pkgversion;
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fuse_reply_bmap;
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cuse_lowlevel_new;
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cuse_lowlevel_main;
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cuse_lowlevel_setup;
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cuse_lowlevel_teardown;
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fuse_fs_ioctl;
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fuse_fs_poll;
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fuse_get_context;
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fuse_getgroups;
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fuse_lowlevel_notify_inval_entry;
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fuse_lowlevel_notify_inval_inode;
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fuse_lowlevel_notify_poll;
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fuse_notify_poll;
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fuse_opt_add_opt_escaped;
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fuse_pollhandle_destroy;
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fuse_reply_ioctl;
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fuse_reply_ioctl_iov;
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fuse_reply_ioctl_retry;
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fuse_reply_poll;
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fuse_req_ctx;
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fuse_req_getgroups;
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fuse_buf_copy;
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fuse_buf_size;
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fuse_fs_read_buf;
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fuse_fs_write_buf;
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fuse_lowlevel_notify_retrieve;
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fuse_lowlevel_notify_store;
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fuse_reply_data;
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fuse_session_process_buf;
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fuse_session_receive_buf;
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fuse_start_cleanup_thread;
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fuse_stop_cleanup_thread;
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fuse_clean_cache;
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fuse_lowlevel_notify_delete;
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fuse_fs_flock;
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fuse_fs_fallocate;
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fuse_lowlevel_help;
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fuse_lowlevel_version;
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fuse_cmdline_help;
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fuse_apply_conn_info_opts;
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fuse_parse_conn_info_opts;
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fuse_fs_lseek;
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fuse_reply_lseek;
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local:
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*;
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};
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FUSE_3.1 {
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global:
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fuse_lib_help;
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fuse_invalidate_path;
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fuse_new_30;
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fuse_new_31;
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fuse_new;
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} FUSE_3.0;
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FUSE_3.2 {
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global:
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fuse_session_loop_mt;
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fuse_session_loop_mt_31;
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fuse_session_loop_mt_32;
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fuse_loop_mt;
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fuse_loop_mt_31;
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} FUSE_3.1;
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FUSE_3.3 {
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global:
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fuse_open_channel;
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} FUSE_3.2;
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FUSE_3.4 {
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global:
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fuse_fs_copy_file_range;
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} FUSE_3.3;
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FUSE_3.7 {
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global:
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fuse_set_log_func;
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fuse_log;
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} FUSE_3.4;
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FUSE_3.12 {
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global:
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fuse_session_loop_mt;
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fuse_session_loop_mt_312;
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fuse_loop_mt;
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fuse_loop_mt_32;
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fuse_loop_mt_312;
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fuse_loop_cfg_create;
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fuse_loop_cfg_destroy;
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fuse_loop_cfg_set_idle_threads;
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fuse_loop_cfg_set_max_threads;
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fuse_loop_cfg_set_clone_fd;
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fuse_loop_cfg_convert;
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fuse_parse_cmdline;
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fuse_parse_cmdline_30;
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fuse_parse_cmdline_312;
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fuse_lowlevel_notify_expire_entry;
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} FUSE_3.4;
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FUSE_3.17 {
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global:
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fuse_main_real_versioned;
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fuse_session_new_versioned;
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_fuse_new_30;
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_fuse_new_31;
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fuse_passthrough_open;
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fuse_passthrough_close;
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fuse_session_custom_io_30;
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fuse_session_custom_io_317;
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fuse_set_fail_signal_handlers;
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fuse_log_enable_syslog;
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fuse_log_close_syslog;
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} FUSE_3.12;
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FUSE_3.17.3 {
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global:
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fuse_set_feature_flag;
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fuse_unset_feature_flag;
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fuse_get_feature_flag;
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# Not part of public API, for internal testing only
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fuse_convert_to_conn_want_ext;
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} FUSE_3.17;
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FUSE_3.18 {
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global:
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fuse_req_is_uring;
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fuse_req_get_payload;
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fuse_lowlevel_notify_increment_epoch;
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fuse_reply_statx;
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fuse_fs_statx;
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} FUSE_3.17;
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FUSE_3.19 {
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global:
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fuse_session_start_teardown_watchdog;
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fuse_session_stop_teardown_watchdog;
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fuse_lowlevel_notify_prune;
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fuse_daemonize_early_start;
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fuse_daemonize_early_success;
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fuse_daemonize_early_fail;
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fuse_daemonize_early_is_active;
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fuse_session_set_debug;
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fuse_session_set_sync_init;
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fuse_service_accept;
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fuse_service_append_args;
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fuse_service_can_allow_other;
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fuse_service_can_fuseblk;
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fuse_service_cmdline;
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fuse_service_destroy;
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fuse_service_exit;
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fuse_service_expect_mount_format;
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fuse_service_finish_file_requests;
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fuse_service_main_real_versioned;
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fuse_service_parse_cmdline_opts;
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fuse_service_receive_file;
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fuse_service_release;
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fuse_service_request_file;
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fuse_service_request_blockdev;
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fuse_service_send_goodbye;
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fuse_service_session_mount;
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fuse_req_secctx_count;
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fuse_req_secctx_reset;
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fuse_req_secctx_next;
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} FUSE_3.18;
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# Local Variables:
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# indent-tabs-mode: t
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# End:
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