In the Linux kernel, the following vulnerability has been resolved:
spufs: fix gang directory lifetimes
prior to "[POWERPC] spufs: Fix gang destroy leaks" we used to have
a problem with gang lifetimes - creation of a gang returns opened
gang directory, which normally gets removed when that gets closed,
but if somebody has created a context belonging to that gang and
kept it alive until the gang got closed, removal failed and we
ended up with a leak.
Unfortunately, it had been fixed the wrong way. Dentry of gang
directory was no longer pinned, and rmdir on close was gone.
One problem was that failure of open kept calling simple_rmdir()
as cleanup, which meant an unbalanced dput(). Another bug was
in the success case - gang creation incremented link count on
root directory, but that was no longer undone when gang got
destroyed.
Fix consists of
* reverting the commit in question
* adding a counter to gang, protected by ->i_rwsem
of gang directory inode.
* having it set to 1 at creation time, dropped
in both spufs_dir_close() and spufs_gang_close() and bumped
in spufs_create_context(), provided that it's not 0.
* using simple_recursive_removal() to take the gang
directory out when counter reaches zero.
Metrics
Affected Vendors & Products
References
History
Mon, 03 Nov 2025 20:30:00 +0000
| Type | Values Removed | Values Added |
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| References |
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Fri, 31 Oct 2025 21:00:00 +0000
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| First Time appeared |
Linux
Linux linux Kernel |
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| Weaknesses | NVD-CWE-noinfo | |
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.22:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.22:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.22:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.22:rc7:*:*:*:*:*:* |
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| Vendors & Products |
Linux
Linux linux Kernel |
Fri, 18 Apr 2025 02:45:00 +0000
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| References |
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| Metrics |
threat_severity
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cvssV3_1
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Wed, 16 Apr 2025 14:30:00 +0000
| Type | Values Removed | Values Added |
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| Description | In the Linux kernel, the following vulnerability has been resolved: spufs: fix gang directory lifetimes prior to "[POWERPC] spufs: Fix gang destroy leaks" we used to have a problem with gang lifetimes - creation of a gang returns opened gang directory, which normally gets removed when that gets closed, but if somebody has created a context belonging to that gang and kept it alive until the gang got closed, removal failed and we ended up with a leak. Unfortunately, it had been fixed the wrong way. Dentry of gang directory was no longer pinned, and rmdir on close was gone. One problem was that failure of open kept calling simple_rmdir() as cleanup, which meant an unbalanced dput(). Another bug was in the success case - gang creation incremented link count on root directory, but that was no longer undone when gang got destroyed. Fix consists of * reverting the commit in question * adding a counter to gang, protected by ->i_rwsem of gang directory inode. * having it set to 1 at creation time, dropped in both spufs_dir_close() and spufs_gang_close() and bumped in spufs_create_context(), provided that it's not 0. * using simple_recursive_removal() to take the gang directory out when counter reaches zero. | |
| Title | spufs: fix gang directory lifetimes | |
| References |
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Status: PUBLISHED
Assigner: Linux
Published: 2025-04-16T14:12:24.571Z
Updated: 2025-11-03T19:41:52.282Z
Reserved: 2024-12-29T08:45:45.814Z
Link: CVE-2025-22072
No data.
Status : Modified
Published: 2025-04-16T15:16:01.390
Modified: 2025-11-03T20:17:42.153
Link: CVE-2025-22072