CVE-2022-50282 (GCVE-0-2022-50282)
Vulnerability from cvelistv5
Published
2025-09-15 14:21
Modified
2025-09-15 14:21
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: chardev: fix error handling in cdev_device_add() While doing fault injection test, I got the following report: ------------[ cut here ]------------ kobject: '(null)' (0000000039956980): is not initialized, yet kobject_put() is being called. WARNING: CPU: 3 PID: 6306 at kobject_put+0x23d/0x4e0 CPU: 3 PID: 6306 Comm: 283 Tainted: G W 6.1.0-rc2-00005-g307c1086d7c9 #1253 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:kobject_put+0x23d/0x4e0 Call Trace: <TASK> cdev_device_add+0x15e/0x1b0 __iio_device_register+0x13b4/0x1af0 [industrialio] __devm_iio_device_register+0x22/0x90 [industrialio] max517_probe+0x3d8/0x6b4 [max517] i2c_device_probe+0xa81/0xc00 When device_add() is injected fault and returns error, if dev->devt is not set, cdev_add() is not called, cdev_del() is not needed. Fix this by checking dev->devt in error path.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/28dc61cc49c6e995121c6d86bef4b73df78dda80
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/34d17b39bceef25e4cf9805cd59250ae05d0a139
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5d2146889fad4cb9e6c13e790d4cfd871486eca8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6acf8597c5b04f455ee0649e11e5f3bcd28f381e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/85a5660491b507d33662b8e81c142e6041e642eb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b5de1eac71fec1af7723f1083d23a24789fd795c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c46db6088bccff5115674d583fef46ede80077a2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d85b5247a79355b8432bfd9ac871f96117f750d4
Impacted products
Vendor Product Version
Linux Linux Version: da97a80a657d1b1b50ef633e8ff5dbf0d417fc8d
Version: 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0
Version: 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0
Version: 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0
Version: 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0
Version: 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0
Version: 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0
Version: 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0
Version: 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0
Version: f78b54e7d83c7879f9a6e49e6724019ca34177cc
Version: d79d7d5c878809964da537336dad5ff55fa1605e
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nchardev: fix error handling in cdev_device_add()\n\nWhile doing fault injection test, I got the following report:\n\n------------[ cut here ]------------\nkobject: \u0027(null)\u0027 (0000000039956980): is not initialized, yet kobject_put() is being called.\nWARNING: CPU: 3 PID: 6306 at kobject_put+0x23d/0x4e0\nCPU: 3 PID: 6306 Comm: 283 Tainted: G        W          6.1.0-rc2-00005-g307c1086d7c9 #1253\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\nRIP: 0010:kobject_put+0x23d/0x4e0\nCall Trace:\n \u003cTASK\u003e\n cdev_device_add+0x15e/0x1b0\n __iio_device_register+0x13b4/0x1af0 [industrialio]\n __devm_iio_device_register+0x22/0x90 [industrialio]\n max517_probe+0x3d8/0x6b4 [max517]\n i2c_device_probe+0xa81/0xc00\n\nWhen device_add() is injected fault and returns error, if dev-\u003edevt is not set,\ncdev_add() is not called, cdev_del() is not needed. Fix this by checking dev-\u003edevt\nin error path."
        }
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        "dateUpdated": "2025-09-15T14:21:18.658Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "title": "chardev: fix error handling in cdev_device_add()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50282",
    "datePublished": "2025-09-15T14:21:18.658Z",
    "dateReserved": "2025-09-15T13:58:00.976Z",
    "dateUpdated": "2025-09-15T14:21:18.658Z",
    "state": "PUBLISHED"
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  }
}


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