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Message-ID: <68ee2dc2.050a0220.91a22.0207.GAE@google.com>
Date: Tue, 14 Oct 2025 04:02:26 -0700
From: syzbot <syzbot+3e58a7dc1a8c00243999@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Forwarded: [PATCH] ntfs3: add debug warnings for run_lock initialization
For archival purposes, forwarding an incoming command email to
linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com.
***
Subject: [PATCH] ntfs3: add debug warnings for run_lock initialization
Author: kartikey406@...il.com
#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
Add debug messages to track when run_lock is initialized for regular
files to help diagnose lockdep warnings.
Signed-off-by: Deepanshu Kartikey <kartikey406@...il.com>
---
fs/ntfs3/file.c | 1 +
fs/ntfs3/inode.c | 83 +++++++++++++++++++++++++++++++++---------------
2 files changed, 58 insertions(+), 26 deletions(-)
diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index 4c90ec2fa2ea..0eb218a2b999 100644
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -773,6 +773,7 @@ static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len)
int ntfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
struct iattr *attr)
{
+ printk(KERN_WARNING "ntfs_setattr: testing by deepanshu \n");
struct inode *inode = d_inode(dentry);
struct ntfs_inode *ni = ntfs_i(inode);
u32 ia_valid = attr->ia_valid;
diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index 3959f23c487a..222c97f7f299 100644
--- a/fs/ntfs3/inode.c
+++ b/fs/ntfs3/inode.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// Created regular file inode// SPDX-License-Identifier: GPL-2.0
/*
*
* Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
@@ -50,7 +50,10 @@ static struct inode *ntfs_read_mft(struct inode *inode,
/* Setup 'uid' and 'gid' */
inode->i_uid = sbi->options->fs_uid;
inode->i_gid = sbi->options->fs_gid;
-
+ if (ino == 25) {
+ ntfs_warn(sb, "DEBUG: ntfs_read_mft ENTERED for inode 25");
+ //dump_stack();
+ }
err = mi_init(&ni->mi, sbi, ino);
if (err)
goto out;
@@ -462,7 +465,11 @@ static struct inode *ntfs_read_mft(struct inode *inode,
inode->i_mapping->a_ops = is_compressed(ni) ? &ntfs_aops_cmpr :
&ntfs_aops;
if (ino != MFT_REC_MFT)
+ {
+ ntfs_warn(sb, "DEBUG: deepanshu Read inode %lu, S_ISREG=%d, run_lock_init=%d",
+ ino, S_ISREG(mode), (ino != MFT_REC_MFT));
init_rwsem(&ni->file.run_lock);
+ }
} else if (S_ISCHR(mode) || S_ISBLK(mode) || S_ISFIFO(mode) ||
S_ISSOCK(mode)) {
inode->i_op = &ntfs_special_inode_operations;
@@ -527,33 +534,52 @@ static int ntfs_set_inode(struct inode *inode, void *data)
}
struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref,
- const struct cpu_str *name)
+ const struct cpu_str *name)
{
- struct inode *inode;
-
- inode = iget5_locked(sb, ino_get(ref), ntfs_test_inode, ntfs_set_inode,
- (void *)ref);
- if (unlikely(!inode))
- return ERR_PTR(-ENOMEM);
-
- /* If this is a freshly allocated inode, need to read it now. */
- if (inode->i_state & I_NEW)
- inode = ntfs_read_mft(inode, name, ref);
- else if (ref->seq != ntfs_i(inode)->mi.mrec->seq) {
- /*
- * Sequence number is not expected.
- * Looks like inode was reused but caller uses the old reference
- */
- iput(inode);
- inode = ERR_PTR(-ESTALE);
- }
-
- if (IS_ERR(inode))
- ntfs_set_state(sb->s_fs_info, NTFS_DIRTY_ERROR);
-
- return inode;
+ struct inode *inode;
+ unsigned long ino = ino_get(ref);
+
+ if (ino == 25) {
+ printk(KERN_ERR "DEEPANSHU: ntfs_iget5 START for inode 25\n");
+ //dump_stack();
+ }
+
+ inode = iget5_locked(sb, ino, ntfs_test_inode, ntfs_set_inode,
+ (void *)ref);
+
+ if (unlikely(!inode))
+ return ERR_PTR(-ENOMEM);
+
+ if (inode->i_ino == 25) {
+ printk(KERN_ERR "DEEPANSHU: After iget5_locked for inode 25, I_NEW=%d, i_state=0x%x\n",
+ !!(inode->i_state & I_NEW), inode->i_state);
+ //dump_stack();
+ }
+
+ /* If this is a freshly allocated inode, need to read it now. */
+ if (inode->i_state & I_NEW) {
+ if (inode->i_ino == 25)
+ printk(KERN_ERR "DEEPANSHU: Calling ntfs_read_mft for inode 25\n");
+ inode = ntfs_read_mft(inode, name, ref);
+ if (inode->i_ino == 25 && IS_ERR(inode))
+ printk(KERN_ERR "DEEPANSHU: ntfs_read_mft FAILED for inode 25\n");
+ } else if (ref->seq != ntfs_i(inode)->mi.mrec->seq) {
+ if (inode->i_ino == 25)
+ printk(KERN_ERR "DEEPANSHU: inode 25 seq mismatch\n");
+ iput(inode);
+ inode = ERR_PTR(-ESTALE);
+ } else if (inode->i_ino == 25) {
+ printk(KERN_ERR "DEEPANSHU: inode 25 found in CACHE, skipping ntfs_read_mft!\n");
+ //dump_stack();
+ }
+
+ if (IS_ERR(inode))
+ ntfs_set_state(sb->s_fs_info, NTFS_DIRTY_ERROR);
+
+ return inode;
}
+
enum get_block_ctx {
GET_BLOCK_GENERAL = 0,
GET_BLOCK_WRITE_BEGIN = 1,
@@ -1180,6 +1206,8 @@ int ntfs_create_inode(struct mnt_idmap *idmap, struct inode *dir,
umode_t mode, dev_t dev, const char *symname, u32 size,
struct ntfs_fnd *fnd)
{
+ printk(KERN_WARNING "GET THE MESSAGE deepanshu \n");
+ //ntfs_warn(sb, "DEBUG: In inodde function");
int err;
struct super_block *sb = dir->i_sb;
struct ntfs_sb_info *sbi = sb->s_fs_info;
@@ -1597,6 +1625,7 @@ int ntfs_create_inode(struct mnt_idmap *idmap, struct inode *dir,
inode->i_size = size;
inode_nohighmem(inode);
} else if (S_ISREG(mode)) {
+ ntfs_warn(dir->i_sb, "DEBUG: Setting up regular file inode %lu", inode->i_ino);
inode->i_op = &ntfs_file_inode_operations;
inode->i_fop = unlikely(is_legacy_ntfs(sb)) ?
&ntfs_legacy_file_operations :
@@ -1604,6 +1633,8 @@ int ntfs_create_inode(struct mnt_idmap *idmap, struct inode *dir,
inode->i_mapping->a_ops = is_compressed(ni) ? &ntfs_aops_cmpr :
&ntfs_aops;
init_rwsem(&ni->file.run_lock);
+ ntfs_warn(sb, "DEBUG: Created regular file inode %lu, run_lock initialized",
+ inode->i_ino);
} else {
inode->i_op = &ntfs_special_inode_operations;
init_special_inode(inode, mode, dev);
--
2.43.0
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