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authorMatt Merhar <mattmerhar@protonmail.com>2020-04-19 17:12:03 -0400
committerHauke Mehrtens <hauke@hauke-m.de>2020-05-04 22:40:41 +0200
commit0974d59b5f1808a0748b5611d8943c72027f72ff (patch)
treeab39423595060f8a55cb0bea1b593de0e230387f /target/linux/generic
parentf40947a8c0c345d69836f4f6528353b9fbb5ce0e (diff)
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kernel: backport fix for non-regular inodes on f2fs
Upstream commit dda9f4b9ca ("f2fs: fix to skip verifying block address for non-regular inode"). On 4.14, attempting to perform operations on a non-regular inode residing on an f2fs filesystem, such rm-ing a device node, would fail and lead to a warning / call trace in dmesg. This fix was already applied to other kernels upstream - including 4.19, from which the patch was taken. More info at https://bugzilla.kernel.org/show_bug.cgi?id=202495. Signed-off-by: Matt Merhar <mattmerhar@protonmail.com> (cherry picked from commit ee500186a5617dfe80f4b762fd6bd0c38af93d49)
Diffstat (limited to 'target/linux/generic')
-rw-r--r--target/linux/generic/backport-4.14/050-v4.19-f2fs-skip-verifying-block-address-non-regular-inode.patch69
1 files changed, 69 insertions, 0 deletions
diff --git a/target/linux/generic/backport-4.14/050-v4.19-f2fs-skip-verifying-block-address-non-regular-inode.patch b/target/linux/generic/backport-4.14/050-v4.19-f2fs-skip-verifying-block-address-non-regular-inode.patch
new file mode 100644
index 0000000000..65ab16a97a
--- /dev/null
+++ b/target/linux/generic/backport-4.14/050-v4.19-f2fs-skip-verifying-block-address-non-regular-inode.patch
@@ -0,0 +1,69 @@
+From dda9f4b9cac6bdd2a96253b4444d7a6ce5132edb Mon Sep 17 00:00:00 2001
+From: Chao Yu <yuchao0@huawei.com>
+Date: Sat, 11 Aug 2018 23:42:09 +0800
+Subject: f2fs: fix to skip verifying block address for non-regular inode
+
+generic/184 1s ... [failed, exit status 1]- output mismatch
+ --- tests/generic/184.out 2015-01-11 16:52:27.643681072 +0800
+ QA output created by 184 - silence is golden
+ +rm: cannot remove '/mnt/f2fs/null': Bad address
+ +mknod: '/mnt/f2fs/null': Bad address
+ +chmod: cannot access '/mnt/f2fs/null': Bad address
+ +./tests/generic/184: line 36: /mnt/f2fs/null: Bad address
+ ...
+
+F2FS-fs (zram0): access invalid blkaddr:259
+EIP: f2fs_is_valid_blkaddr+0x14b/0x1b0 [f2fs]
+ f2fs_iget+0x927/0x1010 [f2fs]
+ f2fs_lookup+0x26e/0x630 [f2fs]
+ __lookup_slow+0xb3/0x140
+ lookup_slow+0x31/0x50
+ walk_component+0x185/0x1f0
+ path_lookupat+0x51/0x190
+ filename_lookup+0x7f/0x140
+ user_path_at_empty+0x36/0x40
+ vfs_statx+0x61/0xc0
+ __do_sys_stat64+0x29/0x40
+ sys_stat64+0x13/0x20
+ do_fast_syscall_32+0xaa/0x22c
+ entry_SYSENTER_32+0x53/0x86
+
+In f2fs_iget(), we will check inode's first block address, if it is valid,
+we will set FI_FIRST_BLOCK_WRITTEN flag in inode.
+
+But we should only do this for regular inode, otherwise, like special
+inode, i_addr[0] is used for storing device info instead of block address,
+it will fail checking flow obviously.
+
+So for non-regular inode, let's skip verifying address and setting flag.
+
+Signed-off-by: Chao Yu <yuchao0@huawei.com>
+Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
+---
+ fs/f2fs/inode.c | 14 ++++++++------
+ 1 file changed, 8 insertions(+), 6 deletions(-)
+
+--- a/fs/f2fs/inode.c
++++ b/fs/f2fs/inode.c
+@@ -310,13 +310,15 @@ static int do_read_inode(struct inode *i
+ /* get rdev by using inline_info */
+ __get_inode_rdev(inode, ri);
+
+- err = __written_first_block(sbi, ri);
+- if (err < 0) {
+- f2fs_put_page(node_page, 1);
+- return err;
++ if (S_ISREG(inode->i_mode)) {
++ err = __written_first_block(sbi, ri);
++ if (err < 0) {
++ f2fs_put_page(node_page, 1);
++ return err;
++ }
++ if (!err)
++ set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
+ }
+- if (!err)
+- set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
+
+ if (!need_inode_block_update(sbi, inode->i_ino))
+ fi->last_disk_size = inode->i_size;