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

usb: xhci: tegra: fix sleep in atomic call

When we set the dual-role port to Host mode, we observed the following
splat:
[ 167.057718] BUG: sleeping function called from invalid context at
include/linux/sched/mm.h:229
[ 167.057872] Workqueue: events tegra_xusb_usb_phy_work
[ 167.057954] Call trace:
[ 167.057962] dump_backtrace+0x0/0x210
[ 167.057996] show_stack+0x30/0x50
[ 167.058020] dump_stack_lvl+0x64/0x84
[ 167.058065] dump_stack+0x14/0x34
[ 167.058100] __might_resched+0x144/0x180
[ 167.058140] __might_sleep+0x64/0xd0
[ 167.058171] slab_pre_alloc_hook.constprop.0+0xa8/0x110
[ 167.058202] __kmalloc_track_caller+0x74/0x2b0
[ 167.058233] kvasprintf+0xa4/0x190
[ 167.058261] kasprintf+0x58/0x90
[ 167.058285] tegra_xusb_find_port_node.isra.0+0x58/0xd0
[ 167.058334] tegra_xusb_find_port+0x38/0xa0
[ 167.058380] tegra_xusb_padctl_get_usb3_companion+0x38/0xd0
[ 167.058430] tegra_xhci_id_notify+0x8c/0x1e0
[ 167.058473] notifier_call_chain+0x88/0x100
[ 167.058506] atomic_notifier_call_chain+0x44/0x70
[ 167.058537] tegra_xusb_usb_phy_work+0x60/0xd0
[ 167.058581] process_one_work+0x1dc/0x4c0
[ 167.058618] worker_thread+0x54/0x410
[ 167.058650] kthread+0x188/0x1b0
[ 167.058672] ret_from_fork+0x10/0x20

The function tegra_xusb_padctl_get_usb3_companion eventually calls
tegra_xusb_find_port and this in turn calls kasprintf which might sleep
and so cannot be called from an atomic context.

Fix this by moving the call to tegra_xusb_padctl_get_usb3_companion to
the tegra_xhci_id_work function where it is really needed.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 02 Oct 2025 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Thu, 02 Oct 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate


Wed, 01 Oct 2025 12:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: usb: xhci: tegra: fix sleep in atomic call When we set the dual-role port to Host mode, we observed the following splat: [ 167.057718] BUG: sleeping function called from invalid context at include/linux/sched/mm.h:229 [ 167.057872] Workqueue: events tegra_xusb_usb_phy_work [ 167.057954] Call trace: [ 167.057962] dump_backtrace+0x0/0x210 [ 167.057996] show_stack+0x30/0x50 [ 167.058020] dump_stack_lvl+0x64/0x84 [ 167.058065] dump_stack+0x14/0x34 [ 167.058100] __might_resched+0x144/0x180 [ 167.058140] __might_sleep+0x64/0xd0 [ 167.058171] slab_pre_alloc_hook.constprop.0+0xa8/0x110 [ 167.058202] __kmalloc_track_caller+0x74/0x2b0 [ 167.058233] kvasprintf+0xa4/0x190 [ 167.058261] kasprintf+0x58/0x90 [ 167.058285] tegra_xusb_find_port_node.isra.0+0x58/0xd0 [ 167.058334] tegra_xusb_find_port+0x38/0xa0 [ 167.058380] tegra_xusb_padctl_get_usb3_companion+0x38/0xd0 [ 167.058430] tegra_xhci_id_notify+0x8c/0x1e0 [ 167.058473] notifier_call_chain+0x88/0x100 [ 167.058506] atomic_notifier_call_chain+0x44/0x70 [ 167.058537] tegra_xusb_usb_phy_work+0x60/0xd0 [ 167.058581] process_one_work+0x1dc/0x4c0 [ 167.058618] worker_thread+0x54/0x410 [ 167.058650] kthread+0x188/0x1b0 [ 167.058672] ret_from_fork+0x10/0x20 The function tegra_xusb_padctl_get_usb3_companion eventually calls tegra_xusb_find_port and this in turn calls kasprintf which might sleep and so cannot be called from an atomic context. Fix this by moving the call to tegra_xusb_padctl_get_usb3_companion to the tegra_xhci_id_work function where it is really needed.
Title usb: xhci: tegra: fix sleep in atomic call
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-10-01T11:42:44.604Z

Reserved: 2025-10-01T11:39:39.401Z

Link: CVE-2023-53475

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-01T12:15:49.830

Modified: 2025-10-02T19:12:17.160

Link: CVE-2023-53475

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-10-01T00:00:00Z

Links: CVE-2023-53475 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-10-02T08:39:56Z

Weaknesses

No weakness.