smatch_data/db/fixup_kernel.sh

   1 #!/bin/bash
   2
   3 # mark some paramaters as coming from user space
   4 cat << EOF | sqlite3 smatch_db.sqlite
   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 function_ptr where function = '(struct file_operations)->read';
   9 delete from function_ptr where function = '(struct file_operations)->write';
  10
  11 /* delete these function pointers which cause false positives */
  12 delete from caller_info where function = '(struct notifier_block)->notifier_call' and type != 0;
  13 delete from caller_info where function = '(struct mISDNchannel)->send' and type != 0;
  14 delete from caller_info where function = '(struct irq_router)->get' and type != 0;
  15 delete from caller_info where function = '(struct irq_router)->set' and type != 0;
  16 delete from caller_info where function = '(struct net_device_ops)->ndo_change_mtu' and caller = 'i40e_dbg_netdev_ops_write';
  17
  18 /* type 3 is USER_DATA */
  19 delete from caller_info where caller = 'hid_input_report' and type = 3;
  20 delete from caller_info where caller = 'nes_process_iwarp_aeqe' and type = 3;
  21 delete from caller_info where caller = 'oz_process_ep0_urb' and type = 3;
  22 delete from caller_info where function = 'dev_hard_start_xmit' and key = '\$\$' and type = 3;
  23 delete from caller_info where function like '%->ndo_start_xmit' and key = '\$\$' and type = 3;
  24 delete from caller_info where caller = 'packet_rcv_fanout' and function = '(struct packet_type)->func' and parameter = 1 and type = 3;
  25 delete from caller_info where caller = 'hptiop_probe' and type = 3;
  26
  27 insert into caller_info values ('userspace', '', 'compat_sys_ioctl', 0, 0, 3, 0, '$$', '1');
  28 insert into caller_info values ('userspace', '', 'compat_sys_ioctl', 0, 0, 3, 1, '$$', '1');
  29 insert into caller_info values ('userspace', '', 'compat_sys_ioctl', 0, 0, 3, 2, '$$', '1');
  30
  31 delete from caller_info where function = '(struct timer_list)->function' and parameter = 0;
  32
  33 /*
  34  * rw_verify_area is a very central function for the kernel.  The 1000000 isn't
  35  * accurate but I've picked it so that we can add "pos + count" without wrapping
  36  * on 32 bits.
  37  */
  38 delete from return_states where function = 'rw_verify_area';
  39 insert into return_states values ('faked', 'rw_verify_area', 0, 1, '0-1000000[<=p3]', 0, 0, -1, '', '');
  40 insert into return_states values ('faked', 'rw_verify_area', 0, 1, '0-1000000[<=p3]', 0, 11, 2, '*\$\$', '0-1000000');
  41 insert into return_states values ('faked', 'rw_verify_area', 0, 1, '0-1000000[<=p3]', 0, 11, 3, '\$\$', '0-1000000');
  42 insert into return_states values ('faked', 'rw_verify_area', 0, 2, '(-4095)-(-1)', 0, 0, -1, '', '');
  43
  44
  45 /* store a bunch of capped functions */
  46 update return_states set return = '0-u32max[<=p2]' where function = 'copy_to_user';
  47 update return_states set return = '0-u32max[<=p2]' where function = '_copy_to_user';
  48 update return_states set return = '0-u32max[<=p2]' where function = '__copy_to_user';
  49 update return_states set return = '0-u32max[<=p2]' where function = 'copy_from_user';
  50 update return_states set return = '0-u32max[<=p2]' where function = '_copy_from_user';
  51 update return_states set return = '0-u32max[<=p2]' where function = '__copy_from_user';
  52
  53 EOF
  54
  55 call_id=$(echo "select distinct call_id from caller_info where function = '__kernel_write';" | sqlite3 smatch_db.sqlite)
  56 for id in $call_id ; do
  57     echo "insert into caller_info values ('fake', '', '__kernel_write', $id, 0, 1, 3, '*\$\$', '0-1000000');" | sqlite3 smatch_db.sqlite
  58 done
  59
  60 for i in $(echo "select distinct return from return_states where function = 'clear_user';" | sqlite3 smatch_db.sqlite ) ; do
  61     echo "update return_states set return = \"$i[<=p1]\" where return = \"$i\" and function = 'clear_user';" | sqlite3 smatch_db.sqlite
  62 done
  63
  64