leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

configfs fix for 5.12

Browse Source 
- fix a use-after-free in __configfs_open_file
    (Daiyue Zhang)
 -----BEGIN PGP SIGNATURE-----
 
 iQI/BAABCgApFiEEgdbnc3r/njty3Iq9D55TZVIEUYMFAmBLs9ELHGhjaEBsc3Qu
 ZGUACgkQD55TZVIEUYPlehAAxSw2zkzYxRvHQ+zhVRKu9x762/SOt+/3P+OuRoiN
 eGZnJi+ofLsoosj7F2Few0zKMWxMQivINpzsM8dMysvmULgbQ/xAlxPgvuk4B2I2
 l4mleFoah2BA/tnzdj9kdqv/WhzKVVhEmBgzpyTDGdRBduYAWmAhkrhXq+qC9ztY
 ArtY4Rvh61I5q12aIF8tFFbEJZqCKgZZ0W3bKO39upJF+kwoztbUUMpPF+YH4FW+
 7JitlaWFBAE89Vcf7BNqMNVk3DtLPy47WI+FaP1zmpy43XRNq2m6/FeLJhn2/S3X
 n31x6IAa4DiEJEn743czhCdAAltcMXxqVrVKF5tGfGh6mr8b96UwxjEN7U+Z4sgX
 gV8rQuHLdPc3dlTQjTuSvAAfrl3J8UpLVWLbva0vWaiUBu2/WVUfO6wJJ+ODUDaq
 woXrPtTqK8xQK2MhpOhPAvBHFsCSKqS7CvXcjOzTLJNUInN85WSVYA297r6IWr+G
 kRJpj6k8dC9e3/LbNEmrBeToKc7tPzYYcx2hlhfkaQRZUdddjuL98po7cJGeu0CR
 S10Zsry/8Lnhe2zIm7u4Hw4gEx73b+uCgZHK17OIRLHzUPmTmXaNh9eWN/jwp1/N
 wNhiPN2OJw9IRVkmTK8TFOeugEJo2VhUo51e36m5sskhowwEYDxtoZ8D7JbpKYS+
 sU8=
 =QljJ
 -----END PGP SIGNATURE-----

Merge tag 'configfs-for-5.12' of git://git.infradead.org/users/hch/configfs

Pull configfs fix from Christoph Hellwig:

 - fix a use-after-free in __configfs_open_file (Daiyue Zhang)

* tag 'configfs-for-5.12' of git://git.infradead.org/users/hch/configfs:
  configfs: fix a use-after-free in __configfs_open_file
This commit is contained in:
Linus Torvalds 2021-03-12 11:48:14 -08:00
commit 8d9d53de51
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
fs/configfs/file.c
View File

@ -378,7 +378,7 @@ static int __configfs_open_file(struct inode *inode, struct file *file, int type
attr = to_attr(dentry);
if (!attr)
goto out_put_item;
goto out_free_buffer;
if (type & CONFIGFS_ITEM_BIN_ATTR) {
buffer->bin_attr = to_bin_attr(dentry);
@ -391,7 +391,7 @@ static int __configfs_open_file(struct inode *inode, struct file *file, int type
/* Grab the module reference for this attribute if we have one */
error = -ENODEV;
if (!try_module_get(buffer->owner))
goto out_put_item;
goto out_free_buffer;
error = -EACCES;
if (!buffer->item->ci_type)
@ -435,8 +435,6 @@ static int __configfs_open_file(struct inode *inode, struct file *file, int type
out_put_module:
module_put(buffer->owner);
out_put_item:
config_item_put(buffer->item);
out_free_buffer:
up_read(&frag->frag_sem);
kfree(buffer);