Bug 2360213 (CVE-2025-22120)

Summary: CVE-2025-22120 kernel: ext4: goto right label 'out_mmap_sem' in ext4_setattr()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-04-16 15:02:54 UTC
In the Linux kernel, the following vulnerability has been resolved:

ext4: goto right label 'out_mmap_sem' in ext4_setattr()

Otherwise, if ext4_inode_attach_jinode() fails, a hung task will
happen because filemap_invalidate_unlock() isn't called to unlock
mapping->invalidate_lock. Like this:

EXT4-fs error (device sda) in ext4_setattr:5557: Out of memory
INFO: task fsstress:374 blocked for more than 122 seconds.
      Not tainted 6.14.0-rc1-next-20250206-xfstests-dirty #726
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:fsstress state:D stack:0     pid:374   tgid:374   ppid:373
                                  task_flags:0x440140 flags:0x00000000
Call Trace:
 <TASK>
 __schedule+0x2c9/0x7f0
 schedule+0x27/0xa0
 schedule_preempt_disabled+0x15/0x30
 rwsem_down_read_slowpath+0x278/0x4c0
 down_read+0x59/0xb0
 page_cache_ra_unbounded+0x65/0x1b0
 filemap_get_pages+0x124/0x3e0
 filemap_read+0x114/0x3d0
 vfs_read+0x297/0x360
 ksys_read+0x6c/0xe0
 do_syscall_64+0x4b/0x110
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Comment 1 Avinash Hanwate 2025-04-17 14:17:36 UTC
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025041627-CVE-2025-22120-24ce@gregkh/T