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MDEV-35541 UBSAN: runtime error: addition of unsigned offset to X overflowed to Y in my_b_flush_io_cache
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/home/buildbot/server/mysys/mf_iocache.c:1793:39: runtime error: addition of unsigned offset to 0x7e1586a239fb overflowed to 0x7e1586a239fa
SUMMARY: UndefinedBehaviorSanitizer: pointer-overflow /home/buildbot/server/mysys/mf_iocache.c:1793:39
This commit is contained in:
Sergei Golubchik 2025-12-22 13:13:50 +01:00
parent 576b4fe4e5
commit d11c4402e7
1 changed files with 7 additions and 4 deletions
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11
mysys/mf_iocache.c
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@ -212,7 +212,7 @@ int init_io_cache_ext(IO_CACHE *info, File file, size_t cachesize,
{
size_t min_cache;
my_off_t pos;
my_off_t end_of_file= ~(my_off_t) 0;
my_off_t end_of_file= MY_FILEPOS_ERROR;
DBUG_ENTER("init_io_cache_ext");
DBUG_PRINT("enter",("cache:%p type: %d pos: %llu",
info, (int) type, (ulonglong) seek_offset));
@ -515,7 +515,7 @@ my_bool reinit_io_cache(IO_CACHE *info, enum cache_type type,
info->write_end=info->write_buffer+info->buffer_length;
info->seek_not_done=1;
}
info->end_of_file = ~(my_off_t) 0;
info->end_of_file= MY_FILE_ERROR;
}
pos=info->request_pos+(seek_offset-info->pos_in_file);
if (type == WRITE_CACHE)
@ -586,7 +586,7 @@ my_bool reinit_io_cache(IO_CACHE *info, enum cache_type type,
info->write_end=(info->buffer + info->buffer_length -
(seek_offset & (IO_SIZE-1)));
}
info->end_of_file= ~(my_off_t) 0;
info->end_of_file= MY_FILEPOS_ERROR;
}
}
info->type=type;
@ -1792,7 +1792,10 @@ int my_b_flush_io_cache(IO_CACHE *info, int need_append_buffer_lock)
if ((length=(size_t) (info->write_pos - info->write_buffer)))
{
my_off_t eof= info->end_of_file + info->write_pos - info->append_read_pos;
my_off_t eof= info->end_of_file;
if (eof != MY_FILE_ERROR)
eof+= info->write_pos - info->append_read_pos;
if (append_cache)
{
if (tmp_file_track(info, eof) ||