1#!/bin/bash 2 3db_file=$1 4cat << EOF | sqlite3 $db_file 5/* we only care about the main ->read/write() functions. */ 6delete from caller_info where function = '(struct file_operations)->read' and file != 'fs/read_write.c'; 7delete from caller_info where function = '(struct file_operations)->write' and file != 'fs/read_write.c'; 8delete from caller_info where function = '(struct file_operations)->read' and caller != '__vfs_read'; 9delete from caller_info where function = '(struct file_operations)->write' and caller != '__vfs_write'; 10delete from function_ptr where function = '(struct file_operations)->read'; 11delete from function_ptr where function = '(struct file_operations)->write'; 12delete from caller_info where function = '__vfs_write' and caller != 'vfs_write'; 13delete from caller_info where function = '__vfs_read' and caller != 'vfs_read'; 14delete from caller_info where function = '(struct file_operations)->write' and caller = 'do_loop_readv_writev'; 15delete from caller_info where function = 'do_splice_from' and caller = 'direct_splice_actor'; 16 17/* delete these function pointers which cause false positives */ 18delete from caller_info where function = '(struct file_operations)->open' and type != 0; 19delete from caller_info where function = '(struct notifier_block)->notifier_call' and type != 0; 20delete from caller_info where function = '(struct mISDNchannel)->send' and type != 0; 21delete from caller_info where function = '(struct irq_router)->get' and type != 0; 22delete from caller_info where function = '(struct irq_router)->set' and type != 0; 23delete from caller_info where function = '(struct net_device_ops)->ndo_change_mtu' and caller = 'i40e_dbg_netdev_ops_write'; 24delete from caller_info where function = '(struct timer_list)->function' and type != 0; 25 26/* 8017 is USER_DATA and 9017 is USER_DATA_SET */ 27delete from caller_info where function = 'dev_hard_start_xmit' and type = 8017; 28delete from return_states where function='vscnprintf' and type = 9017; 29delete from return_states where function='scnprintf' and type = 9017; 30delete from return_states where function='vsnprintf' and type = 9017; 31delete from return_states where function='snprintf' and type = 9017; 32delete from return_states where function='sprintf' and type = 9017; 33delete from return_states where function='vscnprintf' and type = 8017; 34delete from return_states where function='scnprintf' and type = 8017; 35delete from return_states where function='vsnprintf' and type = 8017; 36delete from return_states where function='snprintf' and type = 8017; 37delete from return_states where function='sprintf' and type = 8017; 38/* There is something setting skb->sk->sk_mark and friends to user_data and */ 39/* because of recursion it gets passed to everything and is impossible to debug */ 40delete from caller_info where function = '__dev_queue_xmit' and type = 8017; 41delete from caller_info where function = '__netdev_start_xmit' and type = 8017; 42delete from caller_info where function = '(struct packet_type)->func' and type = 8017; 43delete from caller_info where function = '(struct bio)->bi_end_io' and type = 8017; 44delete from caller_info where type = 8017 and key = '*\$->bi_private'; 45delete from caller_info where type = 8017 and key = '\$->bi_private'; 46delete from caller_info where caller = 'NF_HOOK_COND' and type = 8017; 47delete from caller_info where caller = 'NF_HOOK' and type = 8017; 48/* comparison doesn't deal with chunks, I guess. */ 49delete from return_states where function='get_tty_driver' and type = 8017; 50delete from caller_info where caller = 'snd_ctl_elem_write' and function = '(struct snd_kcontrol)->put' and type = 8017; 51delete from caller_info where caller = 'snd_ctl_elem_read' and function = '(struct snd_kcontrol)->get' and type = 8017; 52delete from caller_info where function = 'nf_tables_newexpr' and type = 8017 and key = '\$->family'; 53delete from caller_info where caller = 'fb_set_var' and function = '(struct fb_ops)->fb_set_par' and type = 8017 and parameter = 0; 54delete from return_states where function = 'tty_lookup_driver' and parameter = 2 and type = 8017; 55delete from caller_info where function = 'iomap_apply' and type = 8017 and key = '*\$'; 56 57insert into caller_info values ('userspace', '', 'compat_sys_ioctl', 0, 0, 8017, 0, '\$', '1'); 58insert into caller_info values ('userspace', '', 'compat_sys_ioctl', 0, 0, 8017, 1, '\$', '1'); 59insert into caller_info values ('userspace', '', 'compat_sys_ioctl', 0, 0, 8017, 2, '\$', '1'); 60 61delete from caller_info where function = '(struct timer_list)->function' and parameter = 0; 62 63/* 64 * rw_verify_area is a very central function for the kernel. The 1000000000 65 * isn't accurate but I've picked it so that we can add "pos + count" without 66 * wrapping on 32 bits. 67 */ 68delete from return_states where function = 'rw_verify_area'; 69insert into return_states values ('faked', 'rw_verify_area', 0, 1, '0-1000000000[<=\$3]', 0, 0, -1, '', ''); 70insert into return_states values ('faked', 'rw_verify_area', 0, 1, '0-1000000000[<=\$3]', 0, 104, 2, '*\$', '0-1000000000'); 71insert into return_states values ('faked', 'rw_verify_area', 0, 1, '0-1000000000[<=\$3]', 0, 103, 3, '\$', '0-1000000000'); 72insert into return_states values ('faked', 'rw_verify_area', 0, 2, '(-4095)-(-1)', 0, 0, -1, '', ''); 73 74delete from return_states where function = 'is_kernel_rodata'; 75insert into return_states values ('faked', 'is_kernel_rodata', 0, 1, '1', 0, 0, -1, '', ''); 76insert into return_states values ('faked', 'is_kernel_rodata', 0, 1, '1', 0, 103, 0, '\$', '4096-ptr_max'); 77insert into return_states values ('faked', 'is_kernel_rodata', 0, 2, '0', 0, 0, -1, '', ''); 78 79/* 80 * Other kmalloc hacking. 81 */ 82delete from return_states where function = 'vmalloc'; 83insert into return_states values ('faked', 'vmalloc', 0, 1, '4096-ptr_max', 0, 0, -1, '', ''); 84insert into return_states values ('faked', 'vmalloc', 0, 1, '4096-ptr_max', 0, 103, 0, '\$', '1-128000000'); 85insert into return_states values ('faked', 'vmalloc', 0, 2, '0', 0, 0, -1, '', ''); 86 87delete from return_states where function = 'ksize'; 88insert into return_states values ('faked', 'ksize', 0, 1, '0', 0, 0, -1, '', ''); 89insert into return_states values ('faked', 'ksize', 0, 1, '0', 0, 103, 0, '\$', '16'); 90insert into return_states values ('faked', 'ksize', 0, 2, '1-4000000', 0, 0, -1, '', ''); 91 92/* store a bunch of capped functions */ 93update return_states set return = '0-u32max[<=\$2]' where function = 'copy_to_user'; 94update return_states set return = '0-u32max[<=\$2]' where function = '_copy_to_user'; 95update return_states set return = '0-u32max[<=\$2]' where function = '__copy_to_user'; 96update return_states set return = '0-u32max[<=\$2]' where function = 'copy_from_user'; 97update return_states set return = '0-u32max[<=\$2]' where function = '_copy_from_user'; 98update return_states set return = '0-u32max[<=\$2]' where function = '__copy_from_user'; 99 100update return_states set return = '0-8' where function = '__arch_hweight8'; 101update return_states set return = '0-16' where function = '__arch_hweight16'; 102update return_states set return = '0-32' where function = '__arch_hweight32'; 103update return_states set return = '0-64' where function = '__arch_hweight64'; 104 105/* 106 * Preserve the value across byte swapping. By the time we use it for math it 107 * will be byte swapped back to CPU endian. 108 */ 109update return_states set return = '0-u64max[==\$0]' where function = '__fswab64'; 110update return_states set return = '0-u32max[==\$0]' where function = '__fswab32'; 111update return_states set return = '0-u16max[==\$0]' where function = '__fswab16'; 112update return_states set return = '0-u64max[==\$0]' where function = '__builtin_bswap64'; 113update return_states set return = '0-u32max[==\$0]' where function = '__builtin_bswap32'; 114update return_states set return = '0-u16max[==\$0]' where function = '__builtin_bswap16'; 115 116delete from return_states where function = 'bitmap_allocate_region' and return = '1'; 117/* Just delete a lot of returns that everyone ignores */ 118delete from return_states where file = 'drivers/pci/access.c' and (return >= 129 and return <= 137); 119 120/* Smatch can't parse wait_for_completion() */ 121update return_states set return = '(-108),(-22),0' where function = '__spi_sync' and return = '(-115),(-108),(-22)'; 122 123delete from caller_info where caller = '__kernel_write'; 124 125/* We sometimes use pre-allocated 4097 byte buffers for performance critical code but pretend it is always PAGE_SIZE */ 126update caller_info set value = 4096 where caller='kernfs_file_direct_read' and function='(struct kernfs_ops)->read' and type = 1002 and parameter = 1; 127/* let's pretend firewire doesn't exist */ 128delete from caller_info where caller='init_fw_attribute_group' and function='(struct device_attribute)->show'; 129/* and let's fake the next dev_attr_show() call entirely */ 130delete from caller_info where caller='sysfs_kf_seq_show' and function='(struct sysfs_ops)->show'; 131insert into caller_info values ('fake', 'sysfs_kf_seq_show', '(struct sysfs_ops)->show', 0, 0, 1001, 0, '\$', '4096-ptr_max'); 132insert into caller_info values ('fake', 'sysfs_kf_seq_show', '(struct sysfs_ops)->show', 0, 0, 1002, 2, '\$', '4096'); 133insert into caller_info values ('fake', 'sysfs_kf_seq_show', '(struct sysfs_ops)->show', 0, 0, 1001, 2, '\$', '4096-ptr_max'); 134insert into caller_info values ('fake', 'sysfs_kf_seq_show', '(struct sysfs_ops)->show', 0, 0, 0, -1, '' , ''); 135/* config fs confuses smatch a little */ 136update caller_info set value = 4096 where caller='fill_read_buffer' and function='(struct configfs_item_operations)->show_attribute' and type = 1002 and parameter = 2; 137 138/* smatch sees the memset() but not the subsequent changes */ 139update return_states set value = "" where function = 'gfs2_ea_find' and return = '0' and type = 101 and parameter = 3; 140 141delete from type_value where type = '(struct fd)->file'; 142delete from type_value where type = '(struct fd)->flags'; 143 144/* This is sometimes an enum or a u64 */ 145delete from type_value where type = '(struct mc_cmd_header)->status'; 146 147/* this is handled in check_kernel.c */ 148delete from return_states where function = "__write_once_size"; 149 150update return_states set value = "s32min-s32max[\$1]" where function = 'atomic_set' and parameter = 0 and type = 1025; 151 152/* handled in the check itself */ 153delete from return_states where function = 'atomic_inc_return' and (type = 8023 or type = 8024); 154delete from return_states where function = 'atomic_add_return' and (type = 8023 or type = 8024); 155delete from return_states where function = 'atomic_sub_return' and (type = 8023 or type = 8024); 156delete from return_states where function = 'atomic_sub_and_test' and (type = 8023 or type = 8024); 157delete from return_states where function = 'atomic_dec_and_test' and (type = 8023 or type = 8024); 158delete from return_states where function = 'atomic_dec' and (type = 8023 or type = 8024); 159delete from return_states where function = 'atomic_inc' and (type = 8023 or type = 8024); 160delete from return_states where function = 'atomic_sub' and (type = 8023 or type = 8024); 161delete from return_states where function = 'refcount_add_not_zero' and (type = 8023 or type = 8024); 162delete from return_states where function = 'refcount_inc_not_zero' and (type = 8023 or type = 8024); 163delete from return_states where function = 'refcount_sub_and_test' and (type = 8023 or type = 8024); 164 165update return_states set return = '0-32,2147483648-2147483690' where function = '_parse_integer' and return = '0'; 166update return_states set value = '0-u64max' where function = '_parse_integer' and type = 1025 and parameter = 2 and key = '*$'; 167 168/* delete some function pointers which are sometimes byte units */ 169delete from caller_info where function = '(struct i2c_algorithm)->master_xfer' and type = 1027; 170 171/* this if from READ_ONCE(). We can't know anything about the data. */ 172delete from type_info where key = '(union anonymous)->__val'; 173 174/* This is RIO_BAD_SIZE */ 175delete from return_states where file = 'drivers/rapidio/rio-access.c' and return = '129'; 176 177/* Smatch sucks at loops */ 178delete from return_states where function = 'ata_dev_next' and type = 103; 179 180/* The problem is that parsing big function pointers is hard. */ 181delete from return_states where function = 'vfs_get_tree' and type = 1024; 182 183/* Locking stuff goes here. */ 184update return_states set parameter = -1, key = '\$' where function = 'ipmi_ssif_lock_cond' and type = 8020 and parameter = 1; 185update return_states set parameter = 1, key = '\$->tree->tree_lock' where function = 'hfs_find_init' and type = 8020 and parameter = 0; 186delete from return_states where function = '__oom_kill_process' and type = 8021; 187 188EOF 189 190# fixme: this is totally broken 191call_id=$(echo "select distinct call_id from caller_info where function = '__kernel_write';" | sqlite3 $db_file) 192for id in $call_id ; do 193 echo "insert into caller_info values ('fake', '', '__kernel_write', $id, 0, 8017, 1, '*\$', '');" | sqlite3 $db_file 194done 195 196for i in $(echo "select distinct return from return_states where function = 'clear_user';" | sqlite3 $db_file ) ; do 197 echo "update return_states set return = \"$i[<=\$1]\" where return = \"$i\" and function = 'clear_user';" | sqlite3 $db_file 198done 199 200echo "select distinct file, function from function_ptr where ptr='(struct rtl_hal_ops)->set_hw_reg';" \ 201 | sqlite3 $db_file | sed -e 's/|/ /' | while read file function ; do 202 203 drv=$(echo $file | perl -ne 's/.*\/rtlwifi\/(.*?)\/sw.c/$1/; print') 204 if [ $drv = "" ] ; then 205 continue 206 fi 207 208 echo "update caller_info 209 set function = '$drv (struct rtl_hal_ops)->set_hw_reg' 210 where function = '(struct rtl_hal_ops)->set_hw_reg' and file like 'drivers/net/wireless/rtlwifi/$drv/%';" \ 211 | sqlite3 $db_file 212 213 echo "insert into function_ptr values ('$file', '$function', '$drv (struct rtl_hal_ops)->set_hw_reg', 1);" \ 214 | sqlite3 $db_file 215done 216 217 218for func in __kmalloc __kmalloc_track_caller ; do 219 220 cat << EOF | sqlite3 $db_file 221delete from return_states where function = '$func'; 222insert into return_states values ('faked', '$func', 0, 1, '16', 0, 0, -1, '', ''); 223insert into return_states values ('faked', '$func', 0, 1, '16', 0, 103, 0, '\$', '0'); 224insert into return_states values ('faked', '$func', 0, 2, '4096-ptr_max', 0, 0, -1, '', ''); 225insert into return_states values ('faked', '$func', 0, 2, '4096-ptr_max', 0, 103, 0, '\$', '1-4000000'); 226insert into return_states values ('faked', '$func', 0, 2, '4096-ptr_max', 0, 1037, -1, '', 400); 227insert into return_states values ('faked', '$func', 0, 3, '0', 0, 0, -1, '', ''); 228insert into return_states values ('faked', '$func', 0, 3, '0', 0, 103, 0, '\$', '1-long_max'); 229EOF 230done 231