CVE-2021-47468

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Source
https://cve.org/CVERecord?id=CVE-2021-47468
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47468.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-47468
Downstream
Related
Published
2024-05-22T07:15:11.603Z
Modified
2026-03-13T05:09:03.046814Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

isdn: mISDN: Fix sleeping function called from invalid context

The driver can call card->isac.release() function from an atomic context.

Fix this by calling this function after releasing the lock.

The following log reveals it:

[ 44.168226 ] BUG: sleeping function called from invalid context at kernel/workqueue.c:3018 [ 44.168941 ] inatomic(): 1, irqsdisabled(): 1, nonblock: 0, pid: 5475, name: modprobe [ 44.169574 ] INFO: lockdep is turned off. [ 44.169899 ] irq event stamp: 0 [ 44.170160 ] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [ 44.170627 ] hardirqs last disabled at (0): [<ffffffff814209ed>] copyprocess+0x132d/0x3e00 [ 44.171240 ] softirqs last enabled at (0): [<ffffffff81420a1a>] copyprocess+0x135a/0x3e00 [ 44.171852 ] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 44.172318 ] Preemption disabled at: [ 44.172320 ] [<ffffffffa009b0a9>] njrelease+0x69/0x500 [netjet] [ 44.174441 ] Call Trace: [ 44.174630 ] dumpstacklvl+0xa8/0xd1 [ 44.174912 ] dump_stack+0x15/0x17 [ 44.175166 ] ___mightsleep+0x3a2/0x510 [ 44.175459 ] ? njrelease+0x69/0x500 [netjet] [ 44.175791 ] __mightsleep+0x82/0xe0 [ 44.176063 ] ? startflushwork+0x20/0x7b0 [ 44.176375 ] startflushwork+0x33/0x7b0 [ 44.176672 ] ? traceirqenablercuidle+0x85/0x170 [ 44.177034 ] ? kasanquarantineput+0xaa/0x1f0 [ 44.177372 ] ? kasanquarantineput+0xaa/0x1f0 [ 44.177711 ] __flushwork+0x11a/0x1a0 [ 44.177991 ] ? flushwork+0x20/0x20 [ 44.178257 ] ? lock_release+0x13c/0x8f0 [ 44.178550 ] ? __kasancheckwrite+0x14/0x20 [ 44.178872 ] ? dorawspinlock+0x148/0x360 [ 44.179187 ] ? readlockisrecursive+0x20/0x20 [ 44.179530 ] ? __kasancheckread+0x11/0x20 [ 44.179846 ] ? do_rawspinunlock+0x55/0x900 [ 44.180168 ] ? ___kasanslabfree+0x116/0x140 [ 44.180505 ] ? rawspinunlockirqrestore+0x41/0x60 [ 44.180878 ] ? skbqueuepurge+0x1a3/0x1c0 [ 44.181189 ] ? kfree+0x13e/0x290 [ 44.181438 ] flushwork+0x17/0x20 [ 44.181695 ] mISDNfreedchannel+0xe8/0x100 [ 44.182006 ] isacrelease+0x210/0x260 [mISDNipac] [ 44.182366 ] njrelease+0xf6/0x500 [netjet] [ 44.182685 ] njremove+0x48/0x70 [netjet] [ 44.182989 ] pcideviceremove+0xa9/0x250

References

Affected packages

Git /

Affected ranges

Database specific

unresolved_ranges 
[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "fixed": "4.4.290"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "4.5"
            },
            {
                "fixed": "4.9.288"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "4.10"
            },
            {
                "fixed": "4.14.253"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "4.15"
            },
            {
                "fixed": "4.19.214"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "4.20"
            },
            {
                "fixed": "5.4.156"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "5.5"
            },
            {
                "fixed": "5.10.76"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "5.11"
            },
            {
                "fixed": "5.14.15"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "5.15-rc1"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "5.15-rc2"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "5.15-rc3"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "5.15-rc4"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "5.15-rc5"
            }
        ]
    }
]
source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47468.json"