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      <title>CVE-2022-50566 — mtd: Fix device name leak when register device failed in add_mtd_device()</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2022-50566</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;mtd: Fix device name leak when register device failed in add_mtd_device()&lt;/p&gt;
&lt;p&gt;There is a kmemleak when register device failed:
  unreferenced object 0xffff888101aab550 (size 8):
    comm &amp;#34;insmod&amp;#34;, pid 3922, jiffies 4295277753 (age 925.408s)
    hex dump (first 8 bytes):
      6d 74 64 30 00 88 ff ff                          mtd0....
    backtrace:
      [&amp;lt;00000000bde26724&amp;gt;] __kmalloc_node_track_caller+0x4e/0x150
      [&amp;lt;000000003c32b416&amp;gt;] kvasprintf+0xb0/0x130
      [&amp;lt;000000001f7a8f15&amp;gt;] kobject_set_name_vargs+0x2f/0xb0
      [&amp;lt;000000006e781163&amp;gt;] dev_set_name+0xab/0xe0
      [&amp;lt;00000000e30d0c78&amp;gt;] add_mtd_device+0x4bb/0x700
      [&amp;lt;00000000f3d34de7&amp;gt;] mtd_device_parse_register+0x2ac/0x3f0
      [&amp;lt;00000000c0d88488&amp;gt;] 0xffffffffa0238457
      [&amp;lt;00000000b40d0922&amp;gt;] 0xffffffffa02a008f
      [&amp;lt;0000000023d17b9d&amp;gt;] do_one_initcall+0x87/0x2a0
      [&amp;lt;00000000770f6ca6&amp;gt;] do_init_module+0xdf/0x320
      [&amp;lt;000000007b6768fe&amp;gt;] load_module+0x2f98/0x3330
      [&amp;lt;00000000346bed5a&amp;gt;] __do_sys_finit_module+0x113/0x1b0
      [&amp;lt;00000000674c2290&amp;gt;] do_syscall_64+0x35/0x80
      [&amp;lt;000000004c6a8d97&amp;gt;] entry_SYSCALL_64_after_hwframe+0x46/0xb0&lt;/p&gt;
&lt;p&gt;If register device failed, should call put_device() to give up the
reference.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;mtd: Fix device name leak when register device failed in add_mtd_device()&lt;/p&gt;
&lt;p&gt;There is a kmemleak when register device failed:
  unreferenced object 0xffff888101aab550 (size 8):
    comm &amp;#34;insmod&amp;#34;, pid 3922, jiffies 4295277753 (age 925.408s)
    hex dump (first 8 bytes):
      6d 74 64 30 00 88 ff ff                          mtd0....
    backtrace:
      [&amp;lt;00000000bde26724&amp;gt;] __kmalloc_node_track_caller+0x4e/0x150
      [&amp;lt;000000003c32b416&amp;gt;] kvasprintf+0xb0/0x130
      [&amp;lt;000000001f7a8f15&amp;gt;] kobject_set_name_vargs+0x2f/0xb0
      [&amp;lt;000000006e781163&amp;gt;] dev_set_name+0xab/0xe0
      [&amp;lt;00000000e30d0c78&amp;gt;] add_mtd_device+0x4bb/0x700
      [&amp;lt;00000000f3d34de7&amp;gt;] mtd_device_parse_register+0x2ac/0x3f0
      [&amp;lt;00000000c0d88488&amp;gt;] 0xffffffffa0238457
      [&amp;lt;00000000b40d0922&amp;gt;] 0xffffffffa02a008f
      [&amp;lt;0000000023d17b9d&amp;gt;] do_one_initcall+0x87/0x2a0
      [&amp;lt;00000000770f6ca6&amp;gt;] do_init_module+0xdf/0x320
      [&amp;lt;000000007b6768fe&amp;gt;] load_module+0x2f98/0x3330
      [&amp;lt;00000000346bed5a&amp;gt;] __do_sys_finit_module+0x113/0x1b0
      [&amp;lt;00000000674c2290&amp;gt;] do_syscall_64+0x35/0x80
      [&amp;lt;000000004c6a8d97&amp;gt;] entry_SYSCALL_64_after_hwframe+0x46/0xb0&lt;/p&gt;
&lt;p&gt;If register device failed, should call put_device() to give up the
reference.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2022-50566</guid>
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