--- /dev/null
+From 7a6e59d719ef0ec9b3d765cba3ba98ee585cbde3 Mon Sep 17 00:00:00 2001
+From: Chao Yu <chao@kernel.org>
+Date: Mon, 2 Nov 2020 17:36:58 +0800
+Subject: f2fs: fix to seek incorrect data offset in inline data file
+
+From: Chao Yu <yuchao0@huawei.com>
+
+commit 7a6e59d719ef0ec9b3d765cba3ba98ee585cbde3 upstream.
+
+As kitestramuort reported:
+
+F2FS-fs (nvme0n1p4): access invalid blkaddr:1598541474
+[ 25.725898] ------------[ cut here ]------------
+[ 25.725903] WARNING: CPU: 6 PID: 2018 at f2fs_is_valid_blkaddr+0x23a/0x250
+[ 25.725923] Call Trace:
+[ 25.725927] ? f2fs_llseek+0x204/0x620
+[ 25.725929] ? ovl_copy_up_data+0x14f/0x200
+[ 25.725931] ? ovl_copy_up_inode+0x174/0x1e0
+[ 25.725933] ? ovl_copy_up_one+0xa22/0xdf0
+[ 25.725936] ? ovl_copy_up_flags+0xa6/0xf0
+[ 25.725938] ? ovl_aio_cleanup_handler+0xd0/0xd0
+[ 25.725939] ? ovl_maybe_copy_up+0x86/0xa0
+[ 25.725941] ? ovl_open+0x22/0x80
+[ 25.725943] ? do_dentry_open+0x136/0x350
+[ 25.725945] ? path_openat+0xb7e/0xf40
+[ 25.725947] ? __check_sticky+0x40/0x40
+[ 25.725948] ? do_filp_open+0x70/0x100
+[ 25.725950] ? __check_sticky+0x40/0x40
+[ 25.725951] ? __check_sticky+0x40/0x40
+[ 25.725953] ? __x64_sys_openat+0x1db/0x2c0
+[ 25.725955] ? do_syscall_64+0x2d/0x40
+[ 25.725957] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
+
+llseek() reports invalid block address access, the root cause is if
+file has inline data, f2fs_seek_block() will access inline data regard
+as block address index in inode block, which should be wrong, fix it.
+
+Reported-by: kitestramuort <kitestramuort@autistici.org>
+Signed-off-by: Chao Yu <yuchao0@huawei.com>
+Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ fs/f2fs/file.c | 11 ++++++++---
+ 1 file changed, 8 insertions(+), 3 deletions(-)
+
+--- a/fs/f2fs/file.c
++++ b/fs/f2fs/file.c
+@@ -412,9 +412,14 @@ static loff_t f2fs_seek_block(struct fil
+ goto fail;
+
+ /* handle inline data case */
+- if (f2fs_has_inline_data(inode) && whence == SEEK_HOLE) {
+- data_ofs = isize;
+- goto found;
++ if (f2fs_has_inline_data(inode)) {
++ if (whence == SEEK_HOLE) {
++ data_ofs = isize;
++ goto found;
++ } else if (whence == SEEK_DATA) {
++ data_ofs = offset;
++ goto found;
++ }
+ }
+
+ pgofs = (pgoff_t)(offset >> PAGE_SHIFT);