diff options
| author | Edward Adam Davis <eadavis@qq.com> | 2023-10-31 13:39:04 +0800 |
|---|---|---|
| committer | Dave Kleikamp <dave.kleikamp@oracle.com> | 2023-11-21 15:26:33 -0600 |
| commit | e0e1958f4c365e380b17ccb35617345b31ef7bf3 (patch) | |
| tree | a3336c1a307df071e9d02057988c53ac0566067a | |
| parent | 74ecdda68242b174920fe7c6133a856fb7d8559b (diff) | |
jfs: fix uaf in jfs_evict_inode
When the execution of diMount(ipimap) fails, the object ipimap that has been
released may be accessed in diFreeSpecial(). Asynchronous ipimap release occurs
when rcu_core() calls jfs_free_node().
Therefore, when diMount(ipimap) fails, sbi->ipimap should not be initialized as
ipimap.
Reported-and-tested-by: syzbot+01cf2dbcbe2022454388@syzkaller.appspotmail.com
Signed-off-by: Edward Adam Davis <eadavis@qq.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
| -rw-r--r-- | fs/jfs/jfs_mount.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/jfs/jfs_mount.c b/fs/jfs/jfs_mount.c index 415eb65a36ff..9b5c6a20b30c 100644 --- a/fs/jfs/jfs_mount.c +++ b/fs/jfs/jfs_mount.c @@ -172,15 +172,15 @@ int jfs_mount(struct super_block *sb) } jfs_info("jfs_mount: ipimap:0x%p", ipimap); - /* map further access of per fileset inodes by the fileset inode */ - sbi->ipimap = ipimap; - /* initialize fileset inode allocation map */ if ((rc = diMount(ipimap))) { jfs_err("jfs_mount: diMount failed w/rc = %d", rc); goto err_ipimap; } + /* map further access of per fileset inodes by the fileset inode */ + sbi->ipimap = ipimap; + return rc; /* |