rxrpc: Fix call timer start racing with call destruction
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix call timer start racing with call destruction The rxrpc_call struct has a timer used to handle various timed events relating to a call. This timer can get started from the packet input routines that are run in softirq mode with just the RCU read lock held. Unfortunately, because only the RCU read lock is held - and neither ref or other lock is taken - the call can start getting destroyed at the same time a packet comes in addressed to that call. This causes the timer - which was already stopped - to get restarted. Later, the timer dispatch code may then oops if the timer got deallocated first. Fix this by trying to take a ref on the rxrpc_call struct and, if successful, passing that ref along to the timer. If the timer was already running, the ref is discarded. The timer completion routine can then pass the ref along to the call's work item when it queues it. If the timer or work item where already queued/running, the extra ref is discarded.
CVE-2022-49149
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2022-49149
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "a158bdd3247b9656df36ba133235fff702e9fdc3",
"lessThan": "051360e51341cd17738d82c15a8226010c7cb7f6",
"versionType": "git"
},
{
"status": "affected",
"version": "a158bdd3247b9656df36ba133235fff702e9fdc3",
"lessThan": "8cbf4ae7a2833767d63114573e5f9a45740cc975",
"versionType": "git"
},
{
"status": "affected",
"version": "a158bdd3247b9656df36ba133235fff702e9fdc3",
"lessThan": "54df5a37f1d951ed27fd47bf9b15a42279582110",
"versionType": "git"
},
{
"status": "affected",
"version": "a158bdd3247b9656df36ba133235fff702e9fdc3",
"lessThan": "5e3c11144e557a9dbf9a2f6abe444689ef9d8aae",
"versionType": "git"
},
{
"status": "affected",
"version": "a158bdd3247b9656df36ba133235fff702e9fdc3",
"lessThan": "4a7f62f91933c8ae5308f9127fd8ea48188b6bc3",
"versionType": "git"
}
],
"programFiles": [
"include/trace/events/rxrpc.h",
"net/rxrpc/ar-internal.h",
"net/rxrpc/call_event.c",
"net/rxrpc/call_object.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.110",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.33",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "5.16.19",
"versionType": "semver",
"lessThanOrEqual": "5.16.*"
},
{
"status": "unaffected",
"version": "5.17.2",
"versionType": "semver",
"lessThanOrEqual": "5.17.*"
},
{
"status": "unaffected",
"version": "5.18",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/trace/events/rxrpc.h",
"net/rxrpc/ar-internal.h",
"net/rxrpc/call_event.c",
"net/rxrpc/call_object.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2022-49149
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #30181 · Revision 1
- Added to Heist Feed
- Publisher date