AI Score
Confidence
Low
EPSS
Percentile
15.5%
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial
In the Linux kernel, the following vulnerability has been resolved:
nvme: fix reconnection fail due to reserved tag allocation
We found a issue on production environment while using NVMe over RDMA,
admin_q reconnect failed forever while remote target and network is ok.
After dig into it, we found it may caused by a ABBA deadlock due to tag
allocation. In my case, the tag was hold by a keep alive request
waiting inside admin_q, as we quiesced admin_q while reset ctrl, so the
request maked as idle and will not process before reset success. As
fabric_q shares tagset with admin_q, while reconnect remote target, we
need a tag for connect command, but the only one reserved tag was held
by keep alive command which waiting inside admin_q. As a result, we
failed to reconnect admin_q forever. In order to fix this issue, I
think we should keep two reserved tags for admin queue.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ed01fee283a0",
"lessThan": "149afee5c741",
"versionType": "git"
},
{
"status": "affected",
"version": "ed01fee283a0",
"lessThan": "ff2f90f88d78",
"versionType": "git"
},
{
"status": "affected",
"version": "ed01fee283a0",
"lessThan": "6851778504cd",
"versionType": "git"
},
{
"status": "affected",
"version": "ed01fee283a0",
"lessThan": "262da920896e",
"versionType": "git"
},
{
"status": "affected",
"version": "ed01fee283a0",
"lessThan": "de105068fead",
"versionType": "git"
}
],
"programFiles": [
"drivers/nvme/host/core.c",
"drivers/nvme/host/fabrics.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.12",
"versionType": "custom"
},
{
"status": "unaffected",
"version": "6.1.83",
"versionType": "custom",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.23",
"versionType": "custom",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.7.11",
"versionType": "custom",
"lessThanOrEqual": "6.7.*"
},
{
"status": "unaffected",
"version": "6.8.2",
"versionType": "custom",
"lessThanOrEqual": "6.8.*"
},
{
"status": "unaffected",
"version": "6.9",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/nvme/host/core.c",
"drivers/nvme/host/fabrics.h"
],
"defaultStatus": "affected"
}
]
git.kernel.org/stable/c/149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8
git.kernel.org/stable/c/262da920896e2f2ab0e3947d9dbee0aa09045818
git.kernel.org/stable/c/6851778504cdb49431809b4ba061903d5f592c96
git.kernel.org/stable/c/de105068fead55ed5c07ade75e9c8e7f86a00d1d
git.kernel.org/stable/c/ff2f90f88d78559802466ad1c84ac5bda4416b3a