BACKPORT: f2fs: sanity check log_blocks_per_seg
f2fs currently only supports 4KB block size and 2MB segment size.
Sanity check log_blocks_per_seg == 9, i.e. 2MB/4KB = (1 << 9)
Partially
(cherry-picked from commit 9a59b62fd88196844cee5fff851bee2cfd7afb6e)
f2fs: do more integrity verification for superblock
Do more sanity check for superblock during ->mount.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Jin Qian <jinqian@google.com>
Bug: 36817013
Change-Id: I0be52e54fba82083068337ceb9f7ad985a87319f
Tracked-On: https://jira01.devtools.intel.com/browse/AW-6221
Signed-off-by: Victor Tasayco Loarte <victorx.tasayco.loarte@intel.com>
Reviewed-on: https://android.intel.com/594758
Reviewed-by: Louis, FabienX <fabienx.louis@intel.com>
Reviewed-by: Dubray, SimonX <simonx.dubray@intel.com>
Reviewed-by: Ledentec, AlexandreX <alexandrex.ledentec@intel.com>
Reviewed-by: Akue, LoicX <loicx.akue@intel.com>
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 9f3bbc5..5975b09 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -424,6 +424,14 @@
return 1;
}
+ /* check log blocks per segment */
+ if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
+ f2fs_msg(sb, KERN_INFO,
+ "Invalid log blocks per segment (%u)\n",
+ le32_to_cpu(raw_super->log_blocks_per_seg));
+ return 1;
+ }
+
if (le32_to_cpu(raw_super->log_sectorsize) !=
F2FS_LOG_SECTOR_SIZE) {
f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize");
