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https://github.com/Divested-Mobile/DivestOS-Build.git
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45 lines
1.4 KiB
Diff
45 lines
1.4 KiB
Diff
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From 3f0531e5775303091a1ff975cdd572cc6a935321 Mon Sep 17 00:00:00 2001
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From: Jin Qian <jinqian@google.com>
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Date: Mon, 24 Apr 2017 18:20:52 -0700
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Subject: [PATCH] BACKPORT: f2fs: sanity check log_blocks_per_seg
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f2fs currently only supports 4KB block size and 2MB segment size.
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Sanity check log_blocks_per_seg == 9, i.e. 2MB/4KB = (1 << 9)
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Partially
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(cherry-picked from commit 9a59b62fd88196844cee5fff851bee2cfd7afb6e)
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f2fs: do more integrity verification for superblock
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Do more sanity check for superblock during ->mount.
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Signed-off-by: Chao Yu <chao2.yu@samsung.com>
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Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Bug: 36817013
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Change-Id: I0be52e54fba82083068337ceb9f7ad985a87319f
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Signed-off-by: Jin Qian <jinqian@google.com>
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---
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fs/f2fs/super.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
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index 3a65e01323528..98a77b0a365d9 100644
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--- a/fs/f2fs/super.c
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+++ b/fs/f2fs/super.c
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@@ -947,6 +947,14 @@ static int sanity_check_raw_super(struct super_block *sb,
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return 1;
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}
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+ /* check log blocks per segment */
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+ if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
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+ f2fs_msg(sb, KERN_INFO,
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+ "Invalid log blocks per segment (%u)\n",
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+ le32_to_cpu(raw_super->log_blocks_per_seg));
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+ return 1;
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+ }
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+
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/* Currently, support 512/1024/2048/4096 bytes sector size */
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if (le32_to_cpu(raw_super->log_sectorsize) >
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F2FS_MAX_LOG_SECTOR_SIZE ||
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