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Stricter validation check when seeking within a buffer

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This commit is contained in:
Pierre Pronchery 2011-09-28 10:39:26 +00:00
parent e4097243f7
commit e7723b7e88
1 changed files with 1 additions and 1 deletions
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2
src/arch.c
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@ -737,7 +737,7 @@ static off_t _arch_seek_buffer(Arch * arch, off_t offset, int whence)
} }
else if(whence == SEEK_CUR) else if(whence == SEEK_CUR)
{ {
if(arch->buffer_pos + offset < 0) if(offset < 0 && -offset > arch->buffer_pos)
return -error_set_code(1, "%s", "Invalid seek"); return -error_set_code(1, "%s", "Invalid seek");
if(offset > 0 && (size_t)offset + arch->buffer_pos if(offset > 0 && (size_t)offset + arch->buffer_pos
>= arch->buffer_cnt) >= arch->buffer_cnt)