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CVE PROGRAM SOURCE RECORD5.5 Medium

CVE-2023-53234

watchdog: Fix kmemleak in watchdog_cdev_register

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix kmemleak in watchdog_cdev_register kmemleak reports memory leaks in watchdog_dev_register, as follows: unreferenced object 0xffff888116233000 (size 2048): comm ""modprobe"", pid 28147, jiffies 4353426116 (age 61.741s) hex dump (first 32 bytes): 80 fa b9 05 81 88 ff ff 08 30 23 16 81 88 ff ff .........0#..... 08 30 23 16 81 88 ff ff 00 00 00 00 00 00 00 00 .0#............. backtrace: [<000000007f001ffd>] __kmem_cache_alloc_node+0x157/0x220 [<000000006a389304>] kmalloc_trace+0x21/0x110 [<000000008d640eea>] watchdog_dev_register+0x4e/0x780 [watchdog] [<0000000053c9f248>] __watchdog_register_device+0x4f0/0x680 [watchdog] [<00000000b2979824>] watchdog_register_device+0xd2/0x110 [watchdog] [<000000001f730178>] 0xffffffffc10880ae [<000000007a1a8bcc>] do_one_initcall+0xcb/0x4d0 [<00000000b98be325>] do_init_module+0x1ca/0x5f0 [<0000000046d08e7c>] load_module+0x6133/0x70f0 ... unreferenced object 0xffff888105b9fa80 (size 16): comm ""modprobe"", pid 28147, jiffies 4353426116 (age 61.741s) hex dump (first 16 bytes): 77 61 74 63 68 64 6f 67 31 00 b9 05 81 88 ff ff watchdog1....... backtrace: [<000000007f001ffd>] __kmem_cache_alloc_node+0x157/0x220 [<00000000486ab89b>] __kmalloc_node_track_caller+0x44/0x1b0 [<000000005a39aab0>] kvasprintf+0xb5/0x140 [<0000000024806f85>] kvasprintf_const+0x55/0x180 [<000000009276cb7f>] kobject_set_name_vargs+0x56/0x150 [<00000000a92e820b>] dev_set_name+0xab/0xe0 [<00000000cec812c6>] watchdog_dev_register+0x285/0x780 [watchdog] [<0000000053c9f248>] __watchdog_register_device+0x4f0/0x680 [watchdog] [<00000000b2979824>] watchdog_register_device+0xd2/0x110 [watchdog] [<000000001f730178>] 0xffffffffc10880ae [<000000007a1a8bcc>] do_one_initcall+0xcb/0x4d0 [<00000000b98be325>] do_init_module+0x1ca/0x5f0 [<0000000046d08e7c>] load_module+0x6133/0x70f0 ... The reason is that put_device is not be called if cdev_device_add fails and wdd->id != 0. watchdog_cdev_register wd_data = kzalloc [1] err = dev_set_name [2] .. err = cdev_device_add if (err) { if (wdd->id == 0) { // wdd->id != 0 .. } return err; // [1],[2] would be leaked To fix it, call put_device in all wdd->id cases.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 450caf1faa0d7bbbd1da93d3ee8c5edea7bc51a8 to < bf26b0e430ce34261f45959989edaf680b64d538affected
  • f4c36f1999745c2160422fe2f362deadbe3a136b to < 8c1655600f4f2839fb844fe8c70b2b65fadc7a56affected
  • ca7851d46de8a8d69022c4e5feed0820483b5f46 to < 59e391b3fc507a15b7e8e9d9f4de87cae177c366affected
  • 72139dfa2464e43957d330266994740bb7be2535 to < c5a21a5501508ae3afa2fe6d5a3e74a37fa48df3affected
  • 72139dfa2464e43957d330266994740bb7be2535 to < 23cc41c3f19c4d858c3708f1c0a06e94958e6c3baffected
  • 72139dfa2464e43957d330266994740bb7be2535 to < ac099d94e0480c937aa9172ab64074981ca1a4d3affected
  • 72139dfa2464e43957d330266994740bb7be2535 to < 50808d034e199fe3ff7a9d2068a4eebeb6b4098aaffected
  • 72139dfa2464e43957d330266994740bb7be2535 to < 13721a2ac66b246f5802ba1b75ad8637e53eeeccaffected
  • f76905ce52653e8a821963c35d9013cff19b1399affected
  • 4.14.182 to < 4.14.308affected
  • 4.19.93 to < 4.19.276affected
  • 5.4.8 to < 5.4.235affected
  • 4.9.225 to < 4.10affected

Linux Linux

Default version status: affected

  • 5.5affected
  • 0 to < 5.5unaffected
  • 4.14.308 to ≤ 4.14.*unaffected
  • 4.19.276 to ≤ 4.19.*unaffected
  • 5.4.235 to ≤ 5.4.*unaffected
  • 5.10.173 to ≤ 5.10.*unaffected
  • 5.15.100 to ≤ 5.15.*unaffected
  • 6.1.18 to ≤ 6.1.*unaffected
  • 6.2.5 to ≤ 6.2.*unaffected
  • 6.3 to ≤ *unaffected

References