(/home/sate/Testcases/c/cve/wireshark-1.2.0/wiretap/k12text.c) |
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| 1942 | | | static void K12Text_ensure_buffer_stack (void) |
| 1943 | | | { |
| 1944 | | | int num_to_alloc; |
| 1945 | | | |
| 1946 | | | if (!(yy_buffer_stack)) { |
Event 1:
Skipping " if". yy_buffer_stack evaluates to true.
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| 1947 | | | |
| 1948 | | | |
| 1949 | | | |
| 1950 | | | |
| 1951 | | | |
| 1952 | | | num_to_alloc = 1; |
| 1953 | | | (yy_buffer_stack) = (struct yy_buffer_state**)K12Text_alloc |
| 1954 | | | (num_to_alloc * sizeof(struct yy_buffer_state*) |
| 1955 | | | ); |
| 1956 | | | if ( ! (yy_buffer_stack) ) |
| 1957 | | | YY_FATAL_ERROR( "out of dynamic memory in K12Text_ensure_buffer_stack()" ); |
| 1958 | | | |
| 1959 | | | memset((yy_buffer_stack), 0, num_to_alloc * sizeof(struct yy_buffer_state*)); |
| 1960 | | | |
| 1961 | | | (yy_buffer_stack_max) = num_to_alloc; |
| 1962 | | | (yy_buffer_stack_top) = 0; |
| 1963 | | | return; |
| 1964 | | | } |
| 1965 | | | |
| 1966 | | | 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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| 1967 | | | |
| 1968 | | | |
| 1969 | | | int grow_size = 8 ; |
Event 3:
grow_size is set to 8.
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| 1970 | | | |
| 1971 | | | 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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| 1972 | | | (yy_buffer_stack) = (struct yy_buffer_state**)K12Text_realloc |
| 1973 | | | ((yy_buffer_stack), |
| 1974 | | | 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 K12Text_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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| 1975 | [+] | | ); |
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