ghsa-6hjm-9p27-2qv2
Vulnerability from github
Published
2024-05-22 09:31
Modified
2024-05-22 09:31
Details

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

net: mdiobus: Fix memory leak in __mdiobus_register

Once device_register() failed, we should call put_device() to decrement reference count for cleanup. Or it will cause memory leak.

BUG: memory leak unreferenced object 0xffff888114032e00 (size 256): comm "kworker/1:3", pid 2960, jiffies 4294943572 (age 15.920s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 08 2e 03 14 81 88 ff ff ................ 08 2e 03 14 81 88 ff ff 90 76 65 82 ff ff ff ff .........ve..... backtrace: [] kmalloc include/linux/slab.h:591 [inline] [] kzalloc include/linux/slab.h:721 [inline] [] device_private_init drivers/base/core.c:3203 [inline] [] device_add+0x89b/0xdf0 drivers/base/core.c:3253 [] __mdiobus_register+0xc3/0x450 drivers/net/phy/mdio_bus.c:537 [] __devm_mdiobus_register+0x75/0xf0 drivers/net/phy/mdio_devres.c:87 [] ax88772_init_mdio drivers/net/usb/asix_devices.c:676 [inline] [] ax88772_bind+0x330/0x480 drivers/net/usb/asix_devices.c:786 [] usbnet_probe+0x3ff/0xdf0 drivers/net/usb/usbnet.c:1745 [] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [] call_driver_probe drivers/base/dd.c:517 [inline] [] really_probe.part.0+0xe7/0x380 drivers/base/dd.c:596 [] really_probe drivers/base/dd.c:558 [inline] [] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:751 [] driver_probe_device+0x2a/0x120 drivers/base/dd.c:781 [] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:898 [] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427 [] __device_attach+0x122/0x260 drivers/base/dd.c:969 [] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487 [] device_add+0x5fb/0xdf0 drivers/base/core.c:3359 [] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2170 [] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238

BUG: memory leak unreferenced object 0xffff888116f06900 (size 32): comm "kworker/0:2", pid 2670, jiffies 4294944448 (age 7.160s) hex dump (first 32 bytes): 75 73 62 2d 30 30 31 3a 30 30 33 00 00 00 00 00 usb-001:003..... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] kstrdup+0x36/0x70 mm/util.c:60 [] kstrdup_const+0x53/0x80 mm/util.c:83 [] kvasprintf_const+0xc2/0x110 lib/kasprintf.c:48 [] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:289 [] dev_set_name+0x63/0x90 drivers/base/core.c:3147 [] __mdiobus_register+0xbb/0x450 drivers/net/phy/mdio_bus.c:535 [] __devm_mdiobus_register+0x75/0xf0 drivers/net/phy/mdio_devres.c:87 [] ax88772_init_mdio drivers/net/usb/asix_devices.c:676 [inline] [] ax88772_bind+0x330/0x480 drivers/net/usb/asix_devices.c:786 [] usbnet_probe+0x3ff/0xdf0 drivers/net/usb/usbnet.c:1745 [] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [] call_driver_probe drivers/base/dd.c:517 [inline] [] really_probe.part.0+0xe7/0x380 drivers/base/dd.c:596 [] really_probe drivers/base/dd.c:558 [inline] [] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:751 [] driver_probe_device+0x2a/0x120 drivers/base/dd.c:781 [] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:898 [] bus_for_each ---truncated---

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{
   affected: [],
   aliases: [
      "CVE-2021-47472",
   ],
   database_specific: {
      cwe_ids: [],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2024-05-22T07:15:11Z",
      severity: null,
   },
   details: "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mdiobus: Fix memory leak in __mdiobus_register\n\nOnce device_register() failed, we should call put_device() to\ndecrement reference count for cleanup. Or it will cause memory\nleak.\n\nBUG: memory leak\nunreferenced object 0xffff888114032e00 (size 256):\n  comm \"kworker/1:3\", pid 2960, jiffies 4294943572 (age 15.920s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 08 2e 03 14 81 88 ff ff  ................\n    08 2e 03 14 81 88 ff ff 90 76 65 82 ff ff ff ff  .........ve.....\n  backtrace:\n    [<ffffffff8265cfab>] kmalloc include/linux/slab.h:591 [inline]\n    [<ffffffff8265cfab>] kzalloc include/linux/slab.h:721 [inline]\n    [<ffffffff8265cfab>] device_private_init drivers/base/core.c:3203 [inline]\n    [<ffffffff8265cfab>] device_add+0x89b/0xdf0 drivers/base/core.c:3253\n    [<ffffffff828dd643>] __mdiobus_register+0xc3/0x450 drivers/net/phy/mdio_bus.c:537\n    [<ffffffff828cb835>] __devm_mdiobus_register+0x75/0xf0 drivers/net/phy/mdio_devres.c:87\n    [<ffffffff82b92a00>] ax88772_init_mdio drivers/net/usb/asix_devices.c:676 [inline]\n    [<ffffffff82b92a00>] ax88772_bind+0x330/0x480 drivers/net/usb/asix_devices.c:786\n    [<ffffffff82baa33f>] usbnet_probe+0x3ff/0xdf0 drivers/net/usb/usbnet.c:1745\n    [<ffffffff82c36e17>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396\n    [<ffffffff82661d17>] call_driver_probe drivers/base/dd.c:517 [inline]\n    [<ffffffff82661d17>] really_probe.part.0+0xe7/0x380 drivers/base/dd.c:596\n    [<ffffffff826620bc>] really_probe drivers/base/dd.c:558 [inline]\n    [<ffffffff826620bc>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:751\n    [<ffffffff826621ba>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:781\n    [<ffffffff82662a26>] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:898\n    [<ffffffff8265eca7>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427\n    [<ffffffff826625a2>] __device_attach+0x122/0x260 drivers/base/dd.c:969\n    [<ffffffff82660916>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487\n    [<ffffffff8265cd0b>] device_add+0x5fb/0xdf0 drivers/base/core.c:3359\n    [<ffffffff82c343b9>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2170\n    [<ffffffff82c4473c>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238\n\nBUG: memory leak\nunreferenced object 0xffff888116f06900 (size 32):\n  comm \"kworker/0:2\", pid 2670, jiffies 4294944448 (age 7.160s)\n  hex dump (first 32 bytes):\n    75 73 62 2d 30 30 31 3a 30 30 33 00 00 00 00 00  usb-001:003.....\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [<ffffffff81484516>] kstrdup+0x36/0x70 mm/util.c:60\n    [<ffffffff814845a3>] kstrdup_const+0x53/0x80 mm/util.c:83\n    [<ffffffff82296ba2>] kvasprintf_const+0xc2/0x110 lib/kasprintf.c:48\n    [<ffffffff82358d4b>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:289\n    [<ffffffff826575f3>] dev_set_name+0x63/0x90 drivers/base/core.c:3147\n    [<ffffffff828dd63b>] __mdiobus_register+0xbb/0x450 drivers/net/phy/mdio_bus.c:535\n    [<ffffffff828cb835>] __devm_mdiobus_register+0x75/0xf0 drivers/net/phy/mdio_devres.c:87\n    [<ffffffff82b92a00>] ax88772_init_mdio drivers/net/usb/asix_devices.c:676 [inline]\n    [<ffffffff82b92a00>] ax88772_bind+0x330/0x480 drivers/net/usb/asix_devices.c:786\n    [<ffffffff82baa33f>] usbnet_probe+0x3ff/0xdf0 drivers/net/usb/usbnet.c:1745\n    [<ffffffff82c36e17>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396\n    [<ffffffff82661d17>] call_driver_probe drivers/base/dd.c:517 [inline]\n    [<ffffffff82661d17>] really_probe.part.0+0xe7/0x380 drivers/base/dd.c:596\n    [<ffffffff826620bc>] really_probe drivers/base/dd.c:558 [inline]\n    [<ffffffff826620bc>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:751\n    [<ffffffff826621ba>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:781\n    [<ffffffff82662a26>] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:898\n    [<ffffffff8265eca7>] bus_for_each\n---truncated---",
   id: "GHSA-6hjm-9p27-2qv2",
   modified: "2024-05-22T09:31:46Z",
   published: "2024-05-22T09:31:46Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2021-47472",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/0c4e87ba11eb331dca2315d484d08441b8c13193",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/2bc10dca9432fadb09e45127e258fc7127fd346d",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/3a0dc2e35a5d6546b1db87fe985582dadc64fe7b",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/4ec0f9abc512cc02fb04daa89ccf6697e80ab417",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/6a18d155d5b35ad50c8fac2be091212487ae58ec",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/8121d0d4fd108280f5cd7b7fe8c6592adaa37be9",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/8ba94a7f7b9fc2a2b808ccceb99b77135deae21a",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/a9831afa2dc8a18205403907c41aa4e0950ac611",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/ab609f25d19858513919369ff3d9a63c02cd9e2e",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/b0feaa8376f52357bf2fd020d0c471713a859728",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/b89f4537d7fdbd0bafb6d8a66a484e0bc99871a4",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/bc5f2f3431ced08300e4cb3aff35f1da14c26433",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/c828115a14eacbf42042770fd68543f134e89efa",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/fd2400dd4f1b8bd7a309b1b424d9e0d188151b01",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/fdbffd95c4ce94d2197c504008eaac46b16bc5a4",
      },
   ],
   schema_version: "1.4.0",
   severity: [],
}


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