linux-kernel - Re: [PATCH] ocfs2: Fix kernel BUG in ocfs2_write

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Message-ID: <202512090210.evJEJv5b-lkp@intel.com>
Date: Tue, 9 Dec 2025 03:11:32 +0800
From: kernel test robot <lkp@...el.com>
To: Prithvi Tambewagh <activprithvi@...il.com>, mark@...heh.com,
	jlbec@...lplan.org, joseph.qi@...ux.alibaba.com
Cc: oe-kbuild-all@...ts.linux.dev, ocfs2-devel@...ts.linux.dev,
	linux-kernel@...r.kernel.org, linux-kernel-mentees@...ts.linux.dev,
	skhan@...uxfoundation.org, david.hunter.linux@...il.com,
	khalid@...nel.org, Prithvi Tambewagh <activprithvi@...il.com>,
	syzbot+c818e5c4559444f88aa0@...kaller.appspotmail.com,
	stable@...r.kernel.org
Subject: Re: [PATCH] ocfs2: Fix kernel BUG in ocfs2_write_block

Hi Prithvi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 24172e0d79900908cf5ebf366600616d29c9b417]

url:    https://github.com/intel-lab-lkp/linux/commits/Prithvi-Tambewagh/ocfs2-Fix-kernel-BUG-in-ocfs2_write_block/20251206-235042
base:   24172e0d79900908cf5ebf366600616d29c9b417
patch link:    https://lore.kernel.org/r/20251206154819.175479-1-activprithvi%40gmail.com
patch subject: [PATCH] ocfs2: Fix kernel BUG in ocfs2_write_block
config: loongarch-randconfig-r112-20251207 (https://download.01.org/0day-ci/archive/20251209/202512090210.evJEJv5b-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 12.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251209/202512090210.evJEJv5b-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512090210.evJEJv5b-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> fs/ocfs2/slot_map.c:197:26: sparse: sparse: cast to restricted __le16
>> fs/ocfs2/slot_map.c:197:26: sparse: sparse: cast to restricted __le16

vim +197 fs/ocfs2/slot_map.c

   182	
   183	static int ocfs2_update_disk_slot(struct ocfs2_super *osb,
   184					  struct ocfs2_slot_info *si,
   185					  int slot_num)
   186	{
   187		int status;
   188		struct buffer_head *bh;
   189	
   190		spin_lock(&osb->osb_lock);
   191		if (si->si_extended)
   192			ocfs2_update_disk_slot_extended(si, slot_num, &bh);
   193		else
   194			ocfs2_update_disk_slot_old(si, slot_num, &bh);
   195		spin_unlock(&osb->osb_lock);
   196		if (bh->b_blocknr < OCFS2_SUPER_BLOCK_BLKNO) {
 > 197			status = ocfs2_error(osb->sb,
   198					     "Invalid Slot Map Buffer Head "
   199					     "Block Number : %llu, Should be >= %d",
   200					     le16_to_cpu(bh->b_blocknr),
   201					     le16_to_cpu((int)OCFS2_SUPER_BLOCK_BLKNO));
   202			if (!status)
   203				return -EIO;
   204			return status;
   205		}
   206	
   207		status = ocfs2_write_block(osb, bh, INODE_CACHE(si->si_inode));
   208		if (status < 0)
   209			mlog_errno(status);
   210	
   211		return status;
   212	}
   213	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki