Race Condition Affecting kernel-livepatch-6_4_0-150600_23_38-default package, versions <1-150600.13.3.2
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Test your applications- Snyk IDSNYK-SLES156-KERNELLIVEPATCH6401506002338DEFAULT-8727177
- published14 Feb 2025
- disclosed13 Feb 2025
Introduced: 13 Feb 2025
CVE-2024-57913 (opens in a new tab)How to fix?
Upgrade SLES:15.6 kernel-livepatch-6_4_0-150600_23_38-default to version 1-150600.13.3.2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-livepatch-6_4_0-150600_23_38-default package and not the kernel-livepatch-6_4_0-150600_23_38-default package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: f_fs: Remove WARN_ON in functionfs_bind
This commit addresses an issue related to below kernel panic where panic_on_warn is enabled. It is caused by the unnecessary use of WARN_ON in functionsfs_bind, which easily leads to the following scenarios.
1.adb_write in adbd 2. UDC write via configfs ================= =====================
->usb_ffs_open_thread() ->UDC write ->open_functionfs() ->configfs_write_iter() ->adb_open() ->gadget_dev_desc_UDC_store() ->adb_write() ->usb_gadget_register_driver_owner ->driver_register() ->StartMonitor() ->bus_add_driver() ->adb_read() ->gadget_bind_driver() <times-out without BIND event> ->configfs_composite_bind() ->usb_add_function() ->open_functionfs() ->ffs_func_bind() ->adb_open() ->functionfs_bind() <ffs->state !=FFS_ACTIVE>
The adb_open, adb_read, and adb_write operations are invoked from the daemon, but trying to bind the function is a process that is invoked by UDC write through configfs, which opens up the possibility of a race condition between the two paths. In this race scenario, the kernel panic occurs due to the WARN_ON from functionfs_bind when panic_on_warn is enabled. This commit fixes the kernel panic by removing the unnecessary WARN_ON.
Kernel panic - not syncing: kernel: panic_on_warn set ... [ 14.542395] Call trace: [ 14.542464] ffs_func_bind+0x1c8/0x14a8 [ 14.542468] usb_add_function+0xcc/0x1f0 [ 14.542473] configfs_composite_bind+0x468/0x588 [ 14.542478] gadget_bind_driver+0x108/0x27c [ 14.542483] really_probe+0x190/0x374 [ 14.542488] __driver_probe_device+0xa0/0x12c [ 14.542492] driver_probe_device+0x3c/0x220 [ 14.542498] __driver_attach+0x11c/0x1fc [ 14.542502] bus_for_each_dev+0x104/0x160 [ 14.542506] driver_attach+0x24/0x34 [ 14.542510] bus_add_driver+0x154/0x270 [ 14.542514] driver_register+0x68/0x104 [ 14.542518] usb_gadget_register_driver_owner+0x48/0xf4 [ 14.542523] gadget_dev_desc_UDC_store+0xf8/0x144 [ 14.542526] configfs_write_iter+0xf0/0x138
References
- https://www.suse.com/security/cve/CVE-2024-57913.html
- https://bugzilla.suse.com/1236102
- https://git.kernel.org/stable/c/19fc1c83454ca9d5699e39633ec79ce26355251c
- https://git.kernel.org/stable/c/3e4d32cc145955d5c56c5498a3ff057e4aafa9d1
- https://git.kernel.org/stable/c/82f60f3600aecd9ffcd0fbc4e193694511c85b47
- https://git.kernel.org/stable/c/a8b6a18b9b66cc4c016d63132b59ce5383f7cdd2
- https://git.kernel.org/stable/c/bfe60030fcd976e3546e1f73d6d0eb3fea26442e
- https://git.kernel.org/stable/c/dfc51e48bca475bbee984e90f33fdc537ce09699
- https://git.kernel.org/stable/c/ea6a1498742430eb2effce0d1439ff29ef37dd7d