Bug 2126423 (CVE-2022-3202)

Summary: CVE-2022-3202 Kernel: jfs: Null Pointer Deference in jfs_evict_inode leads to Denial of Service
Product: [Other] Security Response Reporter: Rohit Keshri <rkeshri>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: acaringi, adscvr, airlied, alciregi, bhu, brdeoliv, bskeggs, chwhite, crwood, ddepaula, debarbos, dhoward, dvlasenk, fhrbata, hdegoede, hkrzesin, hpa, jarod, jarodwilson, jburrell, jfaracco, jferlan, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lleshchi, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rvrbovsk, scweaver, steved, tyberry, vkumar, walters, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: kernel 5.17 rc3 Doc Type: If docs needed, set a value
Doc Text:
A NULL pointer dereference flaw was found in diFree in fs/jfs/inode.c in the Journaled File System (JFS)in the Linux kernel. This flaw allows a local attacker to crash the system or leak internal kernel information.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2022-11-26 10:55:36 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2128459    
Bug Blocks: 2076327    

Description Rohit Keshri 2022-09-13 12:14:10 UTC 
A NULL pointer dereference flaw in diFree in fs/jfs/inode.c in Journaled File System (JFS)in the Linux kernel. This could allow a local attacker to crash the system or leak kernel internal information.

The following is the crash information:

BUG: kernel NULL pointer dereference, address: 0000000000000004
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 162c13067 P4D 162c13067 PUD 15f0f4067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 6659 Comm: syz-executor348 Not tainted 5.17.0-rc4+ #5
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
RIP: 0010:diFree+0x1d1/0x4330 build/../fs/jfs/jfs_imap.c:871
..
Call Trace:
 <TASK>
 jfs_evict_inode+0x605/0x6b0 build/../fs/jfs/inode.c:155
 evict+0x4f4/0xdd0 build/../fs/inode.c:664
 iput_final build/../fs/inode.c:1744 [inline]
 iput+0xc53/0x1100 build/../fs/inode.c:1770
 diFreeSpecial+0xec/0x1b0 build/../fs/jfs/jfs_imap.c:548
 jfs_mount+0xd1c/0x12c0 build/../fs/jfs/jfs_mount.c:191
 jfs_fill_super+0x76d/0x1670 build/../fs/jfs/super.c:560
 mount_bdev+0x626/0x920 build/../fs/super.c:1367
 jfs_do_mount+0xc9/0xe0 build/../fs/jfs/super.c:674
 legacy_get_tree+0x163/0x2e0 build/../fs/fs_context.c:610
 vfs_get_tree+0xd8/0x5d0 build/../fs/super.c:1497
 do_new_mount+0x7b5/0x16f0 build/../fs/namespace.c:2994
 path_mount+0x100d/0x27a0 build/../fs/namespace.c:3324
 do_mount build/../fs/namespace.c:3337 [inline]
 __do_sys_mount build/../fs/namespace.c:3545 [inline]
 __se_sys_mount+0x8a8/0x9d0 build/../fs/namespace.c:3522
 __x64_sys_mount+0x15d/0x1b0 build/../fs/namespace.c:3522
 do_syscall_x64 build/../arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 build/../arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reference:
https://github.com/torvalds/linux/commit/a53046291020ec41e09181396c1e829287b48d47
Comment 3 Rohit Keshri 2022-09-13 12:19:37 UTC 
There was no shipped kernel version that was seen affected by this problem. These files are not built in our source code.
Comment 4 Alex 2022-09-20 16:31:56 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2128459]
Comment 6 Justin M. Forbes 2022-09-23 18:53:40 UTC 
This was fixed for Fedora with the 5.17.3 stable kernel updates
Comment 7 Product Security DevOps Team 2022-11-26 10:55:32 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-3202