DEBIAN-CVE-2022-49810

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Source
https://security-tracker.debian.org/tracker/CVE-2022-49810
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49810.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2022-49810
Upstream
Published
2025-05-01T15:16:04Z
Modified
2025-09-19T06:25:02Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix missing xasretry() calls in xarray iteration netfslib has a number of places in which it performs iteration of an xarray whilst being under the RCU read lock. It *should* call xasretry() as the first thing inside of the loop and do "continue" if it returns true in case the xarray walker passed out a special value indicating that the walk needs to be redone from the root[]. Fix this by adding the missing retry checks. [] I wonder if this should be done inside xasfind(), xasnextnode() and suchlike, but I'm told that's not an simple change to effect. This can cause an oops like that below. Note the faulting address - this is an internal value (|0x2) returned from xarray. BUG: kernel NULL pointer dereference, address: 0000000000000402 ... RIP: 0010:netfsrrequnlock+0xef/0x380 [netfs] ... Call Trace: netfsrreqassess+0xa6/0x240 [netfs] netfsreadpage+0x173/0x3b0 [netfs] ? initwaitvarentry+0x50/0x50 filemapreadpage+0x33/0xf0 filemapgetpages+0x2f2/0x3f0 filemapread+0xaa/0x320 ? dofilpopen+0xb2/0x150 ? rmqueue+0x3be/0xe10 cephreaditer+0x1fe/0x680 [ceph] ? newsyncread+0x115/0x1a0 newsyncread+0x115/0x1a0 vfsread+0xf3/0x180 ksysread+0x5f/0xe0 dosyscall64+0x38/0x90 entrySYSCALL64afterhwframe+0x44/0xae Changes: ======== ver #2) - Changed an unsigned int to a size_t to reduce the likelihood of an overflow as per Willy's suggestion. - Added an additional patch to fix the maths.

References

Affected packages

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.0.10-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.0.10-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.0.10-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}