Bug 2266427 (CVE-2021-46914) - CVE-2021-46914 kernel: unbalanced device enable/disable in suspend/resume
Summary: CVE-2021-46914 kernel: unbalanced device enable/disable in suspend/resume
Keywords:
Status: NEW
Alias: CVE-2021-46914
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2266428
Blocks: 2266369
TreeView+ depends on / blocked
 
Reported: 2024-02-27 19:43 UTC by Rohit Keshri
Modified: 2024-06-16 14:40 UTC (History)
49 users (show)

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Description Rohit Keshri 2024-02-27 19:43:20 UTC
In the Linux kernel, the following vulnerability has been resolved:

ixgbe: fix unbalanced device enable/disable in suspend/resume

pci_disable_device() called in __ixgbe_shutdown() decreases
dev->enable_cnt by 1. pci_enable_device_mem() which increases
dev->enable_cnt by 1, was removed from ixgbe_resume() in commit
6f82b2558735 ("ixgbe: use generic power management"). This caused
unbalanced increase/decrease. So add pci_enable_device_mem() back.

Fix the following call trace.

  ixgbe 0000:17:00.1: disabling already-disabled device
  Call Trace:
   __ixgbe_shutdown+0x10a/0x1e0 [ixgbe]
   ixgbe_suspend+0x32/0x70 [ixgbe]
   pci_pm_suspend+0x87/0x160
   ? pci_pm_freeze+0xd0/0xd0
   dpm_run_callback+0x42/0x170
   __device_suspend+0x114/0x460
   async_suspend+0x1f/0xa0
   async_run_entry_fn+0x3c/0xf0
   process_one_work+0x1dd/0x410
   worker_thread+0x34/0x3f0
   ? cancel_delayed_work+0x90/0x90
   kthread+0x14c/0x170
   ? kthread_park+0x90/0x90
   ret_from_fork+0x1f/0x30

https://git.kernel.org/stable/c/be07581aacae7cd0a073afae8e8862032f794309
https://git.kernel.org/stable/c/debb9df311582c83fe369baa35fa4b92e8a9c58a
https://git.kernel.org/stable/c/f1b4be4a753caa4056496f679d70550d0c11a264

Comment 1 Rohit Keshri 2024-02-27 19:46:17 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266428]

Comment 3 Justin M. Forbes 2024-02-27 23:01:33 UTC
This was fixed for Fedora with the 5.11.16 stable kernel updates.

Comment 6 Alex 2024-06-09 15:11:51 UTC
The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-46914 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags REMOTE NETWORK  ; these flags parsed automatically based on patche data). Such automatic check happens only for Low/Moderates (and only when not from reporter, but parsing already existing CVE). Highs always checked manually (I check it myself and then we check it again in Remediation team). In rare cases some of the Moderates could be increased to High later.


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