CVE - CVE-2022-49841

CVE-ID
CVE-2022-49841	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: serial: imx: Add missing .thaw_noirq hook The following warning is seen with non-console UART instance when system hibernates. [ 37.371969] ------------[ cut here ]------------ [ 37.376599] uart3_root_clk already disabled [ 37.380810] WARNING: CPU: 0 PID: 296 at drivers/clk/clk.c:952 clk_core_disable+0xa4/0xb0 ... [ 37.506986] Call trace: [ 37.509432] clk_core_disable+0xa4/0xb0 [ 37.513270] clk_disable+0x34/0x50 [ 37.516672] imx_uart_thaw+0x38/0x5c [ 37.520250] platform_pm_thaw+0x30/0x6c [ 37.524089] dpm_run_callback.constprop.0+0x3c/0xd4 [ 37.528972] device_resume+0x7c/0x160 [ 37.532633] dpm_resume+0xe8/0x230 [ 37.536036] hibernation_snapshot+0x288/0x430 [ 37.540397] hibernate+0x10c/0x2e0 [ 37.543798] state_store+0xc4/0xd0 [ 37.547203] kobj_attr_store+0x1c/0x30 [ 37.550953] sysfs_kf_write+0x48/0x60 [ 37.554619] kernfs_fop_write_iter+0x118/0x1ac [ 37.559063] new_sync_write+0xe8/0x184 [ 37.562812] vfs_write+0x230/0x290 [ 37.566214] ksys_write+0x68/0xf4 [ 37.569529] __arm64_sys_write+0x20/0x2c [ 37.573452] invoke_syscall.constprop.0+0x50/0xf0 [ 37.578156] do_el0_svc+0x11c/0x150 [ 37.581648] el0_svc+0x30/0x140 [ 37.584792] el0t_64_sync_handler+0xe8/0xf0 [ 37.588976] el0t_64_sync+0x1a0/0x1a4 [ 37.592639] ---[ end trace 56e22eec54676d75 ]--- On hibernating, pm core calls into related hooks in sequence like: .freeze .freeze_noirq .thaw_noirq .thaw With .thaw_noirq hook being absent, the clock will be disabled in a unbalanced call which results the warning above. imx_uart_freeze() clk_prepare_enable() imx_uart_suspend_noirq() clk_disable() imx_uart_thaw clk_disable_unprepare() Adding the missing .thaw_noirq hook as imx_uart_resume_noirq() will have the call sequence corrected as below and thus fix the warning. imx_uart_freeze() clk_prepare_enable() imx_uart_suspend_noirq() clk_disable() imx_uart_resume_noirq() clk_enable() imx_uart_thaw clk_disable_unprepare()
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0a3160f4ffc70ee4bfa1521f698dace06e6091fd URL:https://git.kernel.org/stable/c/0a3160f4ffc70ee4bfa1521f698dace06e6091fd MISC:https://git.kernel.org/stable/c/4561d8008a467cb05ac632a215391d6b787f40aa URL:https://git.kernel.org/stable/c/4561d8008a467cb05ac632a215391d6b787f40aa MISC:https://git.kernel.org/stable/c/476b09e07bd519ec7ba5941a6a6f9a02256dbb21 URL:https://git.kernel.org/stable/c/476b09e07bd519ec7ba5941a6a6f9a02256dbb21 MISC:https://git.kernel.org/stable/c/ae22294e213a402a70fa1731538367d1b758ffe7 URL:https://git.kernel.org/stable/c/ae22294e213a402a70fa1731538367d1b758ffe7 MISC:https://git.kernel.org/stable/c/e3f9d87d6f0732827c443bd1474df21c2fad704b URL:https://git.kernel.org/stable/c/e3f9d87d6f0732827c443bd1474df21c2fad704b MISC:https://git.kernel.org/stable/c/e401312ca6e180ee1bd65f6a766e99dd40aa95e7 URL:https://git.kernel.org/stable/c/e401312ca6e180ee1bd65f6a766e99dd40aa95e7
Assigning CNA
kernel.org
Date Record Created
20250501	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250501)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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