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| author | Paolo Bonzini <pbonzini@redhat.com> | 2024-10-06 03:59:22 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-10-06 03:59:22 -0400 |
| commit | c8d430db8eec7d4fd13a6bea27b7086a54eda6da (patch) | |
| tree | 3c9b35bc9372232183e745cc2a03995a8d053ff6 /kernel/padata.c | |
| parent | 2a5fe5a01668e831af1de3951718fbf88b9a9b9c (diff) | |
| parent | a1d402abf8e3ff1d821e88993fc5331784fac0da (diff) | |
| download | linux-c8d430db8eec7d4fd13a6bea27b7086a54eda6da.tar.gz linux-c8d430db8eec7d4fd13a6bea27b7086a54eda6da.tar.bz2 linux-c8d430db8eec7d4fd13a6bea27b7086a54eda6da.zip | |
Merge tag 'kvmarm-fixes-6.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 fixes for 6.12, take #1
- Fix pKVM error path on init, making sure we do not change critical
system registers as we're about to fail
- Make sure that the host's vector length is at capped by a value
common to all CPUs
- Fix kvm_has_feat*() handling of "negative" features, as the current
code is pretty broken
- Promote Joey to the status of official reviewer, while James steps
down -- hopefully only temporarly
Diffstat (limited to 'kernel/padata.c')
| -rw-r--r-- | kernel/padata.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/padata.c b/kernel/padata.c index 0fa6c2895460..d899f34558af 100644 --- a/kernel/padata.c +++ b/kernel/padata.c @@ -404,7 +404,8 @@ void padata_do_serial(struct padata_priv *padata) /* Sort in ascending order of sequence number. */ list_for_each_prev(pos, &reorder->list) { cur = list_entry(pos, struct padata_priv, list); - if (cur->seq_nr < padata->seq_nr) + /* Compare by difference to consider integer wrap around */ + if ((signed int)(cur->seq_nr - padata->seq_nr) < 0) break; } list_add(&padata->list, pos); @@ -512,9 +513,12 @@ void __init padata_do_multithreaded(struct padata_mt_job *job) * thread function. Load balance large jobs between threads by * increasing the number of chunks, guarantee at least the minimum * chunk size from the caller, and honor the caller's alignment. + * Ensure chunk_size is at least 1 to prevent divide-by-0 + * panic in padata_mt_helper(). */ ps.chunk_size = job->size / (ps.nworks * load_balance_factor); ps.chunk_size = max(ps.chunk_size, job->min_chunk); + ps.chunk_size = max(ps.chunk_size, 1ul); ps.chunk_size = roundup(ps.chunk_size, job->align); /* |