Fixes for 6.3

Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/queue-6.3/fs-ntfs3-fix-null-ptr-deref-on-inode-i_op-in-ntfs_lo.patch b/queue-6.3/fs-ntfs3-fix-null-ptr-deref-on-inode-i_op-in-ntfs_lo.patch
new file mode 100644 (file)
index 0000000..052421f
--- /dev/null
+++ b/queue-6.3/fs-ntfs3-fix-null-ptr-deref-on-inode-i_op-in-ntfs_lo.patch
@@ -0,0 +1,80 @@
+From 757f5d538ac1f6f01143baefadc78e91106b9726 Mon Sep 17 00:00:00 2001
+From: Sasha Levin <sashal@kernel.org>
+Date: Fri, 25 Nov 2022 10:21:59 +0000
+Subject: fs/ntfs3: Fix null-ptr-deref on inode->i_op in ntfs_lookup()
+
+From: ZhangPeng <zhangpeng362@huawei.com>
+
+[ Upstream commit 254e69f284d7270e0abdc023ee53b71401c3ba0c ]
+
+Syzbot reported a null-ptr-deref bug:
+
+ntfs3: loop0: Different NTFS' sector size (1024) and media sector size
+(512)
+ntfs3: loop0: Mark volume as dirty due to NTFS errors
+general protection fault, probably for non-canonical address
+0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
+KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
+RIP: 0010:d_flags_for_inode fs/dcache.c:1980 [inline]
+RIP: 0010:__d_add+0x5ce/0x800 fs/dcache.c:2796
+Call Trace:
+ <TASK>
+ d_splice_alias+0x122/0x3b0 fs/dcache.c:3191
+ lookup_open fs/namei.c:3391 [inline]
+ open_last_lookups fs/namei.c:3481 [inline]
+ path_openat+0x10e6/0x2df0 fs/namei.c:3688
+ do_filp_open+0x264/0x4f0 fs/namei.c:3718
+ do_sys_openat2+0x124/0x4e0 fs/open.c:1310
+ do_sys_open fs/open.c:1326 [inline]
+ __do_sys_open fs/open.c:1334 [inline]
+ __se_sys_open fs/open.c:1330 [inline]
+ __x64_sys_open+0x221/0x270 fs/open.c:1330
+ do_syscall_x64 arch/x86/entry/common.c:50 [inline]
+ do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
+ entry_SYSCALL_64_after_hwframe+0x63/0xcd
+
+If the MFT record of ntfs inode is not a base record, inode->i_op can be
+NULL. And a null-ptr-deref may happen:
+
+ntfs_lookup()
+    dir_search_u() # inode->i_op is set to NULL
+    d_splice_alias()
+        __d_add()
+            d_flags_for_inode() # inode->i_op->get_link null-ptr-deref
+
+Fix this by adding a Check on inode->i_op before calling the
+d_splice_alias() function.
+
+Fixes: 4342306f0f0d ("fs/ntfs3: Add file operations and implementation")
+Reported-by: syzbot+a8f26a403c169b7593fe@syzkaller.appspotmail.com
+Signed-off-by: ZhangPeng <zhangpeng362@huawei.com>
+Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
+Signed-off-by: Sasha Levin <sashal@kernel.org>
+---
+ fs/ntfs3/namei.c | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+diff --git a/fs/ntfs3/namei.c b/fs/ntfs3/namei.c
+index 407fe92394e22..8d206770d8c6d 100644
+--- a/fs/ntfs3/namei.c
++++ b/fs/ntfs3/namei.c
+@@ -88,6 +88,16 @@ static struct dentry *ntfs_lookup(struct inode *dir, struct dentry *dentry,
+               __putname(uni);
+       }
+ 
++      /*
++       * Check for a null pointer
++       * If the MFT record of ntfs inode is not a base record, inode->i_op can be NULL.
++       * This causes null pointer dereference in d_splice_alias().
++       */
++      if (!IS_ERR(inode) && inode->i_op == NULL) {
++              iput(inode);
++              inode = ERR_PTR(-EINVAL);
++      }
++
+       return d_splice_alias(inode, dentry);
+ }
+ 
+-- 
+2.39.2
+

diff --git a/queue-6.3/series b/queue-6.3/series
index 6551c2b13127afcfd5a7df18f8f2ecd582bba014..d27289c60705f35f8464431fd552618e715090d3 100644 (file)
--- a/queue-6.3/series
+++ b/queue-6.3/series
@@ -6,3 +6,4 @@ mtd-spi-nor-spansion-enable-jffs2-write-buffer-for-i.patch
 qcom-llcc-edac-support-polling-mode-for-ecc-handling.patch
 soc-qcom-llcc-do-not-create-edac-platform-device-on-.patch
 mtd-spi-nor-spansion-enable-jffs2-write-buffer-for-i.patch-29548
+fs-ntfs3-fix-null-ptr-deref-on-inode-i_op-in-ntfs_lo.patch