diff options
| author | Junio C Hamano <gitster@pobox.com> | 2019-11-13 04:30:05 +0300 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2019-11-13 04:30:26 +0300 |
| commit | 61eea521fef11c6878a4157bcc0fca6e981a58b2 (patch) | |
| tree | 5c710ba17c64c1a328241783244b8414f2900dfc /fsmonitor.c | |
| parent | 460782b7be869424ff049350bdcbf151f6beca62 (diff) | |
fsmonitor: do not compare bitmap size with size of split index
3444ec2e ("fsmonitor: don't fill bitmap with entries to be removed",
2019-10-11) added a handful of sanity checks that make sure that a
bit position in fsmonitor bitmap does not go beyond the end of the
index. As each bit in the bitmap corresponds to a path in the
index, this is the right check most of the time.
Except for the case when we are in the split-index mode and looking
at a delta index that is to be overlayed on the base index but
before the base index has actually been merged in, namely in read_
and write_fsmonitor_extension(). In these codepaths, the entries in
the split/delta index is typically a small subset of the entire set
of paths (otherwise why would we be using split-index?), so the
bitmap used by the fsmonitor is almost always larger than the number
of entries in the partial index, and the incorrect comparison would
trigger the BUG().
Reported-by: Utsav Shah <ukshah2@illinois.edu>
Helped-by: Kevin Willford <Kevin.Willford@microsoft.com>
Helped-by: William Baker <William.Baker@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'fsmonitor.c')
| -rw-r--r-- | fsmonitor.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fsmonitor.c b/fsmonitor.c index 1f4aa1b150..0477500b39 100644 --- a/fsmonitor.c +++ b/fsmonitor.c @@ -55,7 +55,8 @@ int read_fsmonitor_extension(struct index_state *istate, const void *data, } istate->fsmonitor_dirty = fsmonitor_dirty; - if (istate->fsmonitor_dirty->bit_size > istate->cache_nr) + if (!istate->split_index && + istate->fsmonitor_dirty->bit_size > istate->cache_nr) BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" > %u)", (uintmax_t)istate->fsmonitor_dirty->bit_size, istate->cache_nr); @@ -83,7 +84,8 @@ void write_fsmonitor_extension(struct strbuf *sb, struct index_state *istate) uint32_t ewah_size = 0; int fixup = 0; - if (istate->fsmonitor_dirty->bit_size > istate->cache_nr) + if (!istate->split_index && + istate->fsmonitor_dirty->bit_size > istate->cache_nr) BUG("fsmonitor_dirty has more entries than the index (%"PRIuMAX" > %u)", (uintmax_t)istate->fsmonitor_dirty->bit_size, istate->cache_nr); |