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| author | Edward Adam Davis <eadavis@qq.com> | 2023-10-31 08:39:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-23 10:12:44 +0300 |
| commit | 81b4249ef37297fb17ba102a524039a05c6c5d35 (patch) | |
| tree | 362a00966ee77cc20897874b47afe304f6af8c1e /fs | |
| parent | 3d3898b4d72c677d47fe3cb554449f2df5c12555 (diff) | |
| download | linux-81b4249ef37297fb17ba102a524039a05c6c5d35.tar.xz | |
jfs: fix uaf in jfs_evict_inode
[ Upstream commit e0e1958f4c365e380b17ccb35617345b31ef7bf3 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs')
| -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 f1a705d15904..97d91c1686b8 100644 --- a/fs/jfs/jfs_mount.c +++ b/fs/jfs/jfs_mount.c @@ -184,15 +184,15 @@ 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; /* |