12166 resync smatch to 0.6.1-rc1-il-3

   1 #!/bin/bash
   2 
   3 db_file=$1
   4 cat << EOF | sqlite3 $db_file
   5 /* we only care about the main ->read/write() functions. */
   6 delete from caller_info where function = '(struct file_operations)->read' and file != 'fs/read_write.c';
   7 delete from caller_info where function = '(struct file_operations)->write' and file != 'fs/read_write.c';
   8 delete from caller_info where function = '(struct file_operations)->read' and caller != '__vfs_read';
   9 delete from caller_info where function = '(struct file_operations)->write' and caller != '__vfs_write';
  10 delete from function_ptr where function = '(struct file_operations)->read';
  11 delete from function_ptr where function = '(struct file_operations)->write';
  12 delete from caller_info where function = '__vfs_write' and caller != 'vfs_write';
  13 delete from caller_info where function = '__vfs_read' and caller != 'vfs_read';
  14 delete from caller_info where function = '(struct file_operations)->write' and caller = 'do_loop_readv_writev';
  15 delete from caller_info where function = 'do_splice_from' and caller = 'direct_splice_actor';
  16 
  17 /* delete these function pointers which cause false positives */
  18 delete from caller_info where function = '(struct file_operations)->open' and type != 0;
  19 delete from caller_info where function = '(struct notifier_block)->notifier_call' and type != 0;
  20 delete from caller_info where function = '(struct mISDNchannel)->send' and type != 0;
  21 delete from caller_info where function = '(struct irq_router)->get' and type != 0;
  22 delete from caller_info where function = '(struct irq_router)->set' and type != 0;
  23 delete from caller_info where function = '(struct net_device_ops)->ndo_change_mtu' and caller = 'i40e_dbg_netdev_ops_write';
  24 delete from caller_info where function = '(struct timer_list)->function' and type != 0;
  25 
  26 /* 8017 is USER_DATA and  9017 is USER_DATA_SET */
  27 delete from caller_info where function = 'dev_hard_start_xmit' and type = 8017;
  28 delete from return_states where function='vscnprintf' and type = 9017;
  29 delete from return_states where function='scnprintf' and type = 9017;
  30 delete from return_states where function='vsnprintf' and type = 9017;
  31 delete from return_states where function='snprintf' and type = 9017;
  32 delete from return_states where function='sprintf' and type = 9017;
  33 delete from return_states where function='vscnprintf' and type = 8017;
  34 delete from return_states where function='scnprintf' and type = 8017;
  35 delete from return_states where function='vsnprintf' and type = 8017;
  36 delete from return_states where function='snprintf' and type = 8017;
  37 delete 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 */
  40 delete from caller_info where function = '__dev_queue_xmit' and type = 8017;
  41 delete from caller_info where function = '__netdev_start_xmit' and type = 8017;
  42 delete from caller_info where function = '(struct packet_type)->func' and type = 8017;
  43 delete from caller_info where function = '(struct bio)->bi_end_io' and type = 8017;
  44 delete from caller_info where type = 8017 and key = '*\$->bi_private';
  45 delete from caller_info where type = 8017 and key = '\$->bi_private';
  46 delete from caller_info where caller = 'NF_HOOK_COND' and type = 8017;
  47 delete from caller_info where caller = 'NF_HOOK' and type = 8017;
  48 /* comparison doesn't deal with chunks, I guess.  */
  49 delete from return_states where function='get_tty_driver' and type = 8017;
  50 delete from caller_info where caller = 'snd_ctl_elem_write' and function = '(struct snd_kcontrol)->put' and type = 8017;
  51 delete from caller_info where caller = 'snd_ctl_elem_read' and function = '(struct snd_kcontrol)->get' and type = 8017;
  52 delete from caller_info where function = 'nf_tables_newexpr' and type = 8017 and key = '\$->family';
  53 delete from caller_info where caller = 'fb_set_var' and function = '(struct fb_ops)->fb_set_par' and type = 8017 and parameter = 0;
  54 delete from return_states where function = 'tty_lookup_driver' and parameter = 2 and type = 8017;
  55 delete from caller_info where function = 'iomap_apply' and type = 8017 and key = '*\$';
  56 
  57 insert into caller_info values ('userspace', '', 'compat_sys_ioctl', 0, 0, 8017, 0, '\$', '1');
  58 insert into caller_info values ('userspace', '', 'compat_sys_ioctl', 0, 0, 8017, 1, '\$', '1');
  59 insert into caller_info values ('userspace', '', 'compat_sys_ioctl', 0, 0, 8017, 2, '\$', '1');
  60 
  61 delete 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  */
  68 delete from return_states where function = 'rw_verify_area';
  69 insert into return_states values ('faked', 'rw_verify_area', 0, 1, '0-1000000000[<=\$3]', 0, 0,   -1,      '', '');
  70 insert into return_states values ('faked', 'rw_verify_area', 0, 1, '0-1000000000[<=\$3]', 0, 104,  2, '*\$', '0-1000000000');
  71 insert into return_states values ('faked', 'rw_verify_area', 0, 1, '0-1000000000[<=\$3]', 0, 103, 3,  '\$', '0-1000000000');
  72 insert into return_states values ('faked', 'rw_verify_area', 0, 2, '(-4095)-(-1)',     0, 0,   -1,      '', '');
  73 
  74 delete from return_states where function = 'is_kernel_rodata';
  75 insert into return_states values ('faked', 'is_kernel_rodata', 0, 1, '1', 0, 0,   -1,  '', '');
  76 insert into return_states values ('faked', 'is_kernel_rodata', 0, 1, '1', 0, 103,  0,  '\$', '4096-ptr_max');
  77 insert into return_states values ('faked', 'is_kernel_rodata', 0, 2, '0', 0, 0,   -1,  '', '');
  78 
  79 /*
  80  * Other kmalloc hacking.
  81  */
  82 delete from return_states where function = 'vmalloc';
  83 insert into return_states values ('faked', 'vmalloc', 0, 1, '4096-ptr_max', 0,    0, -1, '', '');
  84 insert into return_states values ('faked', 'vmalloc', 0, 1, '4096-ptr_max', 0, 103,  0, '\$', '1-128000000');
  85 insert into return_states values ('faked', 'vmalloc', 0, 2, '0', 0,    0,  -1, '', '');
  86 
  87 delete from return_states where function = 'ksize';
  88 insert into return_states values ('faked', 'ksize', 0, 1, '0', 0,    0, -1, '', '');
  89 insert into return_states values ('faked', 'ksize', 0, 1, '0', 0, 103,  0, '\$', '16');
  90 insert into return_states values ('faked', 'ksize', 0, 2, '1-4000000', 0,    0,  -1, '', '');
  91 
  92 /* store a bunch of capped functions */
  93 update return_states set return = '0-u32max[<=\$2]' where function = 'copy_to_user';
  94 update return_states set return = '0-u32max[<=\$2]' where function = '_copy_to_user';
  95 update return_states set return = '0-u32max[<=\$2]' where function = '__copy_to_user';
  96 update return_states set return = '0-u32max[<=\$2]' where function = 'copy_from_user';
  97 update return_states set return = '0-u32max[<=\$2]' where function = '_copy_from_user';
  98 update return_states set return = '0-u32max[<=\$2]' where function = '__copy_from_user';
  99 
 100 update return_states set return = '0-8' where function = '__arch_hweight8';
 101 update return_states set return = '0-16' where function = '__arch_hweight16';
 102 update return_states set return = '0-32' where function = '__arch_hweight32';
 103 update 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  */
 109 update return_states set return = '0-u64max[==\$0]' where function = '__fswab64';
 110 update return_states set return = '0-u32max[==\$0]' where function = '__fswab32';
 111 update return_states set return = '0-u16max[==\$0]' where function = '__fswab16';
 112 update return_states set return = '0-u64max[==\$0]' where function = '__builtin_bswap64';
 113 update return_states set return = '0-u32max[==\$0]' where function = '__builtin_bswap32';
 114 update return_states set return = '0-u16max[==\$0]' where function = '__builtin_bswap16';
 115 
 116 delete from return_states where function = 'bitmap_allocate_region' and return = '1';
 117 /* Just delete a lot of returns that everyone ignores */
 118 delete from return_states where file = 'drivers/pci/access.c' and (return >= 129 and return <= 137);
 119 
 120 /* Smatch can't parse wait_for_completion() */
 121 update return_states set return = '(-108),(-22),0' where function = '__spi_sync' and return = '(-115),(-108),(-22)';
 122 
 123 delete 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 */
 126 update 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 */
 128 delete 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 */
 130 delete from caller_info where caller='sysfs_kf_seq_show' and function='(struct sysfs_ops)->show';
 131 insert into caller_info values ('fake', 'sysfs_kf_seq_show', '(struct sysfs_ops)->show', 0, 0, 1001, 0, '\$', '4096-ptr_max');
 132 insert into caller_info values ('fake', 'sysfs_kf_seq_show', '(struct sysfs_ops)->show', 0, 0, 1002, 2, '\$', '4096');
 133 insert into caller_info values ('fake', 'sysfs_kf_seq_show', '(struct sysfs_ops)->show', 0, 0, 1001, 2, '\$', '4096-ptr_max');
 134 insert into caller_info values ('fake', 'sysfs_kf_seq_show', '(struct sysfs_ops)->show', 0, 0, 0,   -1, ''  , '');
 135 /* config fs confuses smatch a little */
 136 update 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 */
 139 update return_states set value = "" where function = 'gfs2_ea_find' and return = '0' and type = 101 and parameter = 3;
 140 
 141 delete from type_value where type = '(struct fd)->file';
 142 delete from type_value where type = '(struct fd)->flags';
 143 
 144 /* This is sometimes an enum or a u64 */
 145 delete from type_value where type = '(struct mc_cmd_header)->status';
 146 
 147 /* this is handled in check_kernel.c */
 148 delete from return_states where function = "__write_once_size";
 149 
 150 update return_states set value = "s32min-s32max[\$1]" where function = 'atomic_set' and parameter = 0 and type = 1025;
 151 
 152 /* handled in the check itself */
 153 delete from return_states where function = 'atomic_inc_return' and (type = 8023 or type = 8024);
 154 delete from return_states where function = 'atomic_add_return' and (type = 8023 or type = 8024);
 155 delete from return_states where function = 'atomic_sub_return' and (type = 8023 or type = 8024);
 156 delete from return_states where function = 'atomic_sub_and_test' and (type = 8023 or type = 8024);
 157 delete from return_states where function = 'atomic_dec_and_test' and (type = 8023 or type = 8024);
 158 delete from return_states where function = 'atomic_dec' and (type = 8023 or type = 8024);
 159 delete from return_states where function = 'atomic_inc' and (type = 8023 or type = 8024);
 160 delete from return_states where function = 'atomic_sub' and (type = 8023 or type = 8024);
 161 delete from return_states where function = 'refcount_add_not_zero' and (type = 8023 or type = 8024);
 162 delete from return_states where function = 'refcount_inc_not_zero' and (type = 8023 or type = 8024);
 163 delete from return_states where function = 'refcount_sub_and_test' and (type = 8023 or type = 8024);
 164 
 165 update return_states set return = '0-32,2147483648-2147483690' where function = '_parse_integer' and return = '0';
 166 update 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 */
 169 delete 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.  */
 172 delete from type_info where key = '(union anonymous)->__val';
 173 
 174 /* This is RIO_BAD_SIZE */
 175 delete from return_states where file = 'drivers/rapidio/rio-access.c' and return = '129';
 176 
 177 /* Smatch sucks at loops */
 178 delete from return_states where function = 'ata_dev_next' and type = 103;
 179 
 180 /* The problem is that parsing big function pointers is hard. */
 181 delete from return_states where function = 'vfs_get_tree' and type = 1024;
 182 
 183 /* Locking stuff goes here.  */
 184 update return_states set parameter = -1, key = '\$' where function = 'ipmi_ssif_lock_cond' and type = 8020 and parameter = 1;
 185 update return_states set parameter = 1, key = '\$->tree->tree_lock' where function = 'hfs_find_init' and type = 8020 and parameter = 0;
 186 delete from return_states where function = '__oom_kill_process' and type = 8021;
 187 
 188 EOF
 189 
 190 # fixme: this is totally broken
 191 call_id=$(echo "select distinct call_id from caller_info where function = '__kernel_write';" | sqlite3 $db_file)
 192 for id in $call_id ; do
 193     echo "insert into caller_info values ('fake', '', '__kernel_write', $id, 0, 8017, 1, '*\$', '');" | sqlite3 $db_file
 194 done
 195 
 196 for 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
 198 done
 199 
 200 echo "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
 215 done
 216 
 217 
 218 for func in __kmalloc __kmalloc_track_caller ; do
 219 
 220     cat << EOF | sqlite3 $db_file
 221 delete from return_states where function = '$func';
 222 insert into return_states values ('faked', '$func', 0, 1, '16', 0,    0,  -1, '', '');
 223 insert into return_states values ('faked', '$func', 0, 1, '16', 0, 103,   0, '\$', '0');
 224 insert into return_states values ('faked', '$func', 0, 2, '4096-ptr_max', 0,    0, -1, '', '');
 225 insert into return_states values ('faked', '$func', 0, 2, '4096-ptr_max', 0, 103,  0, '\$', '1-4000000');
 226 insert into return_states values ('faked', '$func', 0, 2, '4096-ptr_max', 0, 1037,  -1, '', 400);
 227 insert into return_states values ('faked', '$func', 0, 3, '0', 0,    0,  -1, '', '');
 228 insert into return_states values ('faked', '$func', 0, 3, '0', 0,    103,  0, '\$', '1-long_max');
 229 EOF
 230 done
--- EOF ---