CVE-2022-49383
Renesas Linux Watchdog BUG: Invalid Wait Context Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: watchdog: rzg2l_wdt: Fix 'BUG: Invalid wait context' This patch fixes the issue 'BUG: Invalid wait context' during restart() callback by using clk_prepare_enable() instead of pm_runtime_get_sync() for turning on the clocks during restart. This issue is noticed when testing with renesas_defconfig. [ 42.213802] reboot: Restarting system [ 42.217860] [ 42.219364] ============================= [ 42.223368] [ BUG: Invalid wait context ] [ 42.227372] 5.17.0-rc5-arm64-renesas-00002-g10393723e35e #522 Not tainted [ 42.234153] ----------------------------- [ 42.238155] systemd-shutdow/1 is trying to lock: [ 42.242766] ffff00000a650828 (&genpd->mlock){+.+.}-{3:3}, at: genpd_lock_mtx+0x14/0x20 [ 42.250709] other info that might help us debug this: [ 42.255753] context-{4:4} [ 42.258368] 2 locks held by systemd-shutdow/1: [ 42.262806] #0: ffff80000944e1c8 (system_transition_mutex#2){+.+.}-{3:3}, at: __do_sys_reboot+0xd0/0x250 [ 42.272388] #1: ffff8000094c4e40 (rcu_read_lock){....}-{1:2}, at: atomic_notifier_call_chain+0x0/0x150 [ 42.281795] stack backtrace: [ 42.284672] CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 5.17.0-rc5-arm64-renesas-00002-g10393723e35e #522 [ 42.294577] Hardware name: Renesas SMARC EVK based on r9a07g044c2 (DT) [ 42.301096] Call trace: [ 42.303538] dump_backtrace+0xcc/0xd8 [ 42.307203] show_stack+0x14/0x30 [ 42.310517] dump_stack_lvl+0x88/0xb0 [ 42.314180] dump_stack+0x14/0x2c [ 42.317492] __lock_acquire+0x1b24/0x1b50 [ 42.321502] lock_acquire+0x120/0x3a8 [ 42.325162] __mutex_lock+0x84/0x8f8 [ 42.328737] mutex_lock_nested+0x30/0x58 [ 42.332658] genpd_lock_mtx+0x14/0x20 [ 42.336319] genpd_runtime_resume+0xc4/0x228 [ 42.340587] __rpm_callback+0x44/0x170 [ 42.344337] rpm_callback+0x64/0x70 [ 42.347824] rpm_resume+0x4e0/0x6b8 [ 42.351310] __pm_runtime_resume+0x50/0x78 [ 42.355404] rzg2l_wdt_restart+0x28/0x68 [ 42.359329] watchdog_restart_notifier+0x1c/0x30 [ 42.363943] atomic_notifier_call_chain+0x94/0x150 [ 42.368732] do_kernel_restart+0x24/0x30 [ 42.372652] machine_restart+0x44/0x70 [ 42.376399] kernel_restart+0x3c/0x60 [ 42.380058] __do_sys_reboot+0x228/0x250 [ 42.383977] __arm64_sys_reboot+0x20/0x28 [ 42.387983] invoke_syscall+0x40/0xf8
INFO
Published Date :
Feb. 26, 2025, 7:01 a.m.
Last Modified :
Feb. 26, 2025, 7:01 a.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
References to Advisories, Solutions, and Tools
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CVE-2022-49383.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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CVE-2022-49383 vulnerability anywhere in the article.
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CVE-2022-49383 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 26, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: watchdog: rzg2l_wdt: Fix 'BUG: Invalid wait context' This patch fixes the issue 'BUG: Invalid wait context' during restart() callback by using clk_prepare_enable() instead of pm_runtime_get_sync() for turning on the clocks during restart. This issue is noticed when testing with renesas_defconfig. [ 42.213802] reboot: Restarting system [ 42.217860] [ 42.219364] ============================= [ 42.223368] [ BUG: Invalid wait context ] [ 42.227372] 5.17.0-rc5-arm64-renesas-00002-g10393723e35e #522 Not tainted [ 42.234153] ----------------------------- [ 42.238155] systemd-shutdow/1 is trying to lock: [ 42.242766] ffff00000a650828 (&genpd->mlock){+.+.}-{3:3}, at: genpd_lock_mtx+0x14/0x20 [ 42.250709] other info that might help us debug this: [ 42.255753] context-{4:4} [ 42.258368] 2 locks held by systemd-shutdow/1: [ 42.262806] #0: ffff80000944e1c8 (system_transition_mutex#2){+.+.}-{3:3}, at: __do_sys_reboot+0xd0/0x250 [ 42.272388] #1: ffff8000094c4e40 (rcu_read_lock){....}-{1:2}, at: atomic_notifier_call_chain+0x0/0x150 [ 42.281795] stack backtrace: [ 42.284672] CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 5.17.0-rc5-arm64-renesas-00002-g10393723e35e #522 [ 42.294577] Hardware name: Renesas SMARC EVK based on r9a07g044c2 (DT) [ 42.301096] Call trace: [ 42.303538] dump_backtrace+0xcc/0xd8 [ 42.307203] show_stack+0x14/0x30 [ 42.310517] dump_stack_lvl+0x88/0xb0 [ 42.314180] dump_stack+0x14/0x2c [ 42.317492] __lock_acquire+0x1b24/0x1b50 [ 42.321502] lock_acquire+0x120/0x3a8 [ 42.325162] __mutex_lock+0x84/0x8f8 [ 42.328737] mutex_lock_nested+0x30/0x58 [ 42.332658] genpd_lock_mtx+0x14/0x20 [ 42.336319] genpd_runtime_resume+0xc4/0x228 [ 42.340587] __rpm_callback+0x44/0x170 [ 42.344337] rpm_callback+0x64/0x70 [ 42.347824] rpm_resume+0x4e0/0x6b8 [ 42.351310] __pm_runtime_resume+0x50/0x78 [ 42.355404] rzg2l_wdt_restart+0x28/0x68 [ 42.359329] watchdog_restart_notifier+0x1c/0x30 [ 42.363943] atomic_notifier_call_chain+0x94/0x150 [ 42.368732] do_kernel_restart+0x24/0x30 [ 42.372652] machine_restart+0x44/0x70 [ 42.376399] kernel_restart+0x3c/0x60 [ 42.380058] __do_sys_reboot+0x228/0x250 [ 42.383977] __arm64_sys_reboot+0x20/0x28 [ 42.387983] invoke_syscall+0x40/0xf8 Added Reference https://git.kernel.org/stable/c/0a635239cd5484d8f2e702713ccc49ec82aa7594 Added Reference https://git.kernel.org/stable/c/6505541e5298cea2b79da68ee626f583f8e18784 Added Reference https://git.kernel.org/stable/c/e4cf89596c1f1e33309556699f910ced4abbaf44
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-49383 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-49383
weaknesses.