Description
In the Linux kernel, the following vulnerability has been resolved: ext4: update s_journal_inum if it changes after journal replay When mounting a crafted ext4 image, s_journal_inum may change after journal replay, which is obviously unreasonable because we have successfully loaded and replayed the journal through the old s_journal_inum. And the new s_journal_inum bypasses some of the checks in ext4_get_journal(), which may trigger a null pointer dereference problem. So if s_journal_inum changes after the journal replay, we ignore the change, and rewrite the current journal_inum to the superblock.
Product status
345c0dbf3a30872d9b204db96b5857cd00808cae (git) before 499fef2030fb754c68b1c7cb3a799a3bc1d0d925
345c0dbf3a30872d9b204db96b5857cd00808cae (git) before 70e66bdeae4d0f7c8e87762f425b68aedd5e8955
345c0dbf3a30872d9b204db96b5857cd00808cae (git) before ee0c5277d4fab920bd31345c49e193ecede9ecef
345c0dbf3a30872d9b204db96b5857cd00808cae (git) before 3039d8b8692408438a618fac2776b629852663c3
51890201da4d654f6ca131bc45a0e892bb10de1d (git)
7eff961ca9f364be255d279346517ba0158ec8e3 (git)
a9855260fe8d8680bf8c4f0d8303b696c861e99b (git)
795762468125a6412c089651e74f780bee154118 (git)
2fd4629de51974002f4e9cf1a35a1926dd6c9d99 (git)
3.16.85 (semver) before 3.17
4.4.221 (semver) before 4.5
4.9.221 (semver) before 4.10
4.14.178 (semver) before 4.15
4.19.73 (semver) before 4.20
5.2
Any version before 5.2
5.15.104 (semver)
6.1.21 (semver)
6.2.8 (semver)
6.3 (original_commit_for_fix)
References
git.kernel.org/...c/499fef2030fb754c68b1c7cb3a799a3bc1d0d925
git.kernel.org/...c/70e66bdeae4d0f7c8e87762f425b68aedd5e8955
git.kernel.org/...c/ee0c5277d4fab920bd31345c49e193ecede9ecef
git.kernel.org/...c/3039d8b8692408438a618fac2776b629852663c3