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| author | Darrick J. Wong <djwong@kernel.org> | 2026-09-14 22:39:10 -0700 |
|---|---|---|
| committer | Carlos Maiolino <cem@kernel.org> | 2026-09-17 11:27:41 +0200 |
| commit | 476582d754cdc5110f806001417fea6c77824c13 (patch) | |
| tree | 6264b5168ee449138bfe3fc7471f6b0eb2afe1ec /tools/perf/tests/shell/test_stackcollapse_python.sh | |
| parent | ffb48dccce1960a9ea24463a2f3c21d124d6b672 (diff) | |
| download | linux-next-476582d754cdc5110f806001417fea6c77824c13.tar.gz linux-next-476582d754cdc5110f806001417fea6c77824c13.zip | |
xfs: don't let hidden_space go negative in xfs_metafile_resv_init
LOLLM points out that if the amount of fdblocks that we can reserve for
a metadata btree file goes below the space already used by that file,
then the hidden_space subtraction can underflow, causing
xfs_dec_fdblocks to subtract a huge amount of space. We never want the
target to be less than the used sapce, so fix the logic that adjusts
dblocks_avail downwards.
Also fix an error in the adjacent comment.
Cc: stable@vger.kernel.org # v6.15
Fixes: 1df8d75030b787 ("xfs: make metabtree reservations global")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Assisted-by: LOLLM # finding obvious bugs
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
Diffstat (limited to 'tools/perf/tests/shell/test_stackcollapse_python.sh')
0 files changed, 0 insertions, 0 deletions