From: zhengliang zhengliang6@huawei.com
stable inclusion from stable-v4.19.270 commit 87cf27e5c9a25c0c5037fdf6dcaa8d4334e4c0d0 category: bugfix bugzilla: 187904,https://gitee.com/openeuler/kernel/issues/I6BJAR CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 9a5d265fed014115f35e598022c956e5d2fb863e ]
It should call trace exit in all return path for ext4_truncate.
Signed-off-by: zhengliang zhengliang6@huawei.com Reviewed-by: Andreas Dilger adilger@dilger.ca Reviewed-by: Ritesh Harjani riteshh@linux.ibm.com Link: https://lore.kernel.org/r/20200701083027.45996-1-zhengliang6@huawei.com Signed-off-by: Theodore Ts'o tytso@mit.edu Stable-dep-of: a71248b1accb ("ext4: fix use-after-free in ext4_orphan_cleanup") Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Baokun Li libaokun1@huawei.com Reviewed-by: Zhang Yi yi.zhang@huawei.com Signed-off-by: Yongqiang Liu liuyongqiang13@huawei.com --- fs/ext4/inode.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 6006842c679c..59df8ee6e9b0 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4499,7 +4499,7 @@ int ext4_truncate(struct inode *inode) trace_ext4_truncate_enter(inode);
if (!ext4_can_truncate(inode)) - return 0; + goto out_trace;
ext4_clear_inode_flag(inode, EXT4_INODE_EOFBLOCKS);
@@ -4510,16 +4510,14 @@ int ext4_truncate(struct inode *inode) int has_inline = 1;
err = ext4_inline_data_truncate(inode, &has_inline); - if (err) - return err; - if (has_inline) - return 0; + if (err || has_inline) + goto out_trace; }
/* If we zero-out tail of the page, we have to create jinode for jbd2 */ if (inode->i_size & (inode->i_sb->s_blocksize - 1)) { if (ext4_inode_attach_jinode(inode) < 0) - return 0; + goto out_trace; }
if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) @@ -4528,8 +4526,10 @@ int ext4_truncate(struct inode *inode) credits = ext4_blocks_for_truncate(inode);
handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, credits); - if (IS_ERR(handle)) - return PTR_ERR(handle); + if (IS_ERR(handle)) { + err = PTR_ERR(handle); + goto out_trace; + }
if (inode->i_size & (inode->i_sb->s_blocksize - 1)) ext4_block_truncate_page(handle, mapping, inode->i_size); @@ -4578,6 +4578,7 @@ int ext4_truncate(struct inode *inode) ext4_mark_inode_dirty(handle, inode); ext4_journal_stop(handle);
+out_trace: trace_ext4_truncate_exit(inode); return err; }