(/home/sate/Testcases/c/cve/wireshark-1.2.0/epan/dfilter/scanner.c) |
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| 1904 | | | static void df_ensure_buffer_stack (void) |
| 1905 | | | { |
| 1906 | | | int num_to_alloc; |
| 1907 | | | |
| 1908 | | | if (!(yy_buffer_stack)) { |
Event 1:
Skipping " if". yy_buffer_stack evaluates to true.
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| 1909 | | | |
| 1910 | | | |
| 1911 | | | |
| 1912 | | | |
| 1913 | | | |
| 1914 | | | num_to_alloc = 1; |
| 1915 | | | (yy_buffer_stack) = (struct yy_buffer_state**)df_alloc |
| 1916 | | | (num_to_alloc * sizeof(struct yy_buffer_state*) |
| 1917 | | | ); |
| 1918 | | | if ( ! (yy_buffer_stack) ) |
| 1919 | | | YY_FATAL_ERROR( "out of dynamic memory in df_ensure_buffer_stack()" ); |
| 1920 | | | |
| 1921 | | | memset((yy_buffer_stack), 0, num_to_alloc * sizeof(struct yy_buffer_state*)); |
| 1922 | | | |
| 1923 | | | (yy_buffer_stack_max) = num_to_alloc; |
| 1924 | | | (yy_buffer_stack_top) = 0; |
| 1925 | | | return; |
| 1926 | | | } |
| 1927 | | | |
| 1928 | | | if ((yy_buffer_stack_top) >= ((yy_buffer_stack_max)) - 1){ |
Event 2:
Taking true branch. yy_buffer_stack_top >= yy_buffer_stack_max - 1 evaluates to true.
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| 1929 | | | |
| 1930 | | | |
| 1931 | | | int grow_size = 8 ; |
Event 3:
grow_size is set to 8.
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| 1932 | | | |
| 1933 | | | num_to_alloc = (yy_buffer_stack_max) + grow_size; |
Event 4:
num_to_alloc is set to yy_buffer_stack_max + 8. - Determines the allocation size later.
See related event 3.
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| 1934 | | | (yy_buffer_stack) = (struct yy_buffer_state**)df_realloc |
| 1935 | | | ((yy_buffer_stack), |
| 1936 | | | num_to_alloc * sizeof(struct yy_buffer_state*) |
Event 5:
4 * num_to_alloc, which evaluates to 4 * yy_buffer_stack_max + 32, is passed to df_realloc() as the second argument. - This multiplication may overflow and it is used as the allocation size later.
See related event 4.
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| 1937 | [+] | | ); |
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