linux-kernel - [PATCH] mkfs.f2fs: ensure zone size is equal or bigger than segment size

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Message-ID: <20250522182445.2175742-1-daeho43@gmail.com>
Date: Thu, 22 May 2025 11:24:45 -0700
From: Daeho Jeong <daeho43@...il.com>
To: linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	kernel-team@...roid.com
Cc: Daeho Jeong <daehojeong@...gle.com>
Subject: [PATCH] mkfs.f2fs: ensure zone size is equal or bigger than segment size

From: Daeho Jeong <daehojeong@...gle.com>

Otherwise, it doesn't work with a crash.

Signed-off-by: Daeho Jeong <daehojeong@...gle.com>
---
 lib/libf2fs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/libf2fs.c b/lib/libf2fs.c
index d2579d7..396e22c 100644
--- a/lib/libf2fs.c
+++ b/lib/libf2fs.c
@@ -1346,6 +1346,11 @@ int f2fs_get_f2fs_info(void)
 				return -1;
 			}
 			c.zone_blocks = c.devices[i].zone_blocks;
+			if (c.zone_blocks < DEFAULT_BLOCKS_PER_SEGMENT) {
+				MSG(0, "\tError: zone size should not be less "
+					"than segment size\n");
+				return -1;
+			}
 		}
 
 		/*
-- 
2.49.0.1151.ga128411c76-goog