Realloc() needs to allocate one more byte for sprintf()#746
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vathpela merged 1 commit intorhboot:mainfrom Jun 3, 2025
Merged
Realloc() needs to allocate one more byte for sprintf()#746vathpela merged 1 commit intorhboot:mainfrom
vathpela merged 1 commit intorhboot:mainfrom
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In generate_sbat_var_defs.c, realloc() should allocate one more byte for the end of string '\0' when running sprintf() later. Suppose we use fgets() to get line="abc\n", so strlen(line)=4 bytes. realloc(...,strlen(line),1) will allocate 5 bytes which is not capable to save line(3 bytes),'\' and 'n'(2 bytes) pluses extra '\0' byte totally 6 bytes when running sprintf(.....,"%s\\n", line) later on. where '\n' of line has been removed in line[strlen(line) - 1] = 0; Signed-off-by: Dennis Tseng <dennis.tseng@suse.com>
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In generate_sbat_var_defs.c, realloc() should allocate one more byte for the end of string '\0' when running sprintf() later. please also refer #744
Suppose we use fgets() to get line="abc\n", so strlen(line)=4 bytes. realloc(...,strlen(line),1) will allocate only 5 bytes which is not capable to save line(3 bytes),'\' and 'n'(2 bytes) pluses extra '\0' byte totally 6 bytes when running sprintf(.....,"%s\\n", line) later on.
where '\n' of line has been removed in line[strlen(line) - 1] = 0;