diff options
| author | Alexander Motin <[email protected]> | 2021-09-17 13:17:18 -0400 |
|---|---|---|
| committer | Tony Hutter <[email protected]> | 2022-03-04 15:37:33 -0800 |
| commit | 0e2bb1a3ee395887a8e75f0273aca2b328a3f3cd (patch) | |
| tree | 88319d6874d574740bab1a91343b56536eb7e357 /module | |
| parent | 037434e4fc5e30f6bb38ce62c7aab8aaa30c6e0b (diff) | |
Really zero the zero page
While switching abd_zero_buf allocation KPI I've missed the fact
that kmem_zalloc() zeroed the allocation, while kmem_cache_alloc()
does not. Add explicit bzero() after it.
I don't think it should have caused real problems, but leaking one
memory page content all over the pool is not good.
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Brian Atkinson <[email protected]>
Reviewed-by: Ryan Moeller <[email protected]>
Signed-off-by: Alexander Motin <[email protected]>
Closes #12569
Diffstat (limited to 'module')
| -rw-r--r-- | module/os/freebsd/zfs/abd_os.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/module/os/freebsd/zfs/abd_os.c b/module/os/freebsd/zfs/abd_os.c index 95a83542f..41ceed1dc 100644 --- a/module/os/freebsd/zfs/abd_os.c +++ b/module/os/freebsd/zfs/abd_os.c @@ -250,6 +250,7 @@ abd_alloc_zero_scatter(void) n = abd_chunkcnt_for_bytes(SPA_MAXBLOCKSIZE); abd_zero_buf = kmem_cache_alloc(abd_chunk_cache, KM_PUSHPAGE); + bzero(abd_zero_buf, PAGE_SIZE); abd_zero_scatter = abd_alloc_struct(SPA_MAXBLOCKSIZE); abd_zero_scatter->abd_flags |= ABD_FLAG_OWNER | ABD_FLAG_ZEROS; |