From bba7cbf0a481ab16f9a9a4874b7dbd5682e4d3a4 Mon Sep 17 00:00:00 2001 From: Alexander Motin Date: Wed, 26 Apr 2023 12:20:43 -0400 Subject: [PATCH] Fix positive ABD size assertion in abd_verify(). Gang ABDs without childred are legal, and they do have zero size. For other ABD types zero size doesn't have much sense and likely not working correctly now. Reviewed-by: Igor Kozhukhov Reviewed-by: Brian Behlendorf Signed-off-by: Alexander Motin Sponsored by: iXsystems, Inc. Closes #14795 --- module/zfs/abd.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/module/zfs/abd.c b/module/zfs/abd.c index d4921d0ba..26222d2ef 100644 --- a/module/zfs/abd.c +++ b/module/zfs/abd.c @@ -109,7 +109,6 @@ void abd_verify(abd_t *abd) { #ifdef ZFS_DEBUG - ASSERT3U(abd->abd_size, >, 0); ASSERT3U(abd->abd_size, <=, SPA_MAXBLOCKSIZE); ASSERT3U(abd->abd_flags, ==, abd->abd_flags & (ABD_FLAG_LINEAR | ABD_FLAG_OWNER | ABD_FLAG_META | ABD_FLAG_MULTI_ZONE | @@ -118,6 +117,7 @@ abd_verify(abd_t *abd) IMPLY(abd->abd_parent != NULL, !(abd->abd_flags & ABD_FLAG_OWNER)); IMPLY(abd->abd_flags & ABD_FLAG_META, abd->abd_flags & ABD_FLAG_OWNER); if (abd_is_linear(abd)) { + ASSERT3U(abd->abd_size, >, 0); ASSERT3P(ABD_LINEAR_BUF(abd), !=, NULL); } else if (abd_is_gang(abd)) { uint_t child_sizes = 0; @@ -130,6 +130,7 @@ abd_verify(abd_t *abd) } ASSERT3U(abd->abd_size, ==, child_sizes); } else { + ASSERT3U(abd->abd_size, >, 0); abd_verify_scatter(abd); } #endif