CVE: CVE-2025-21824
Published: 2025-02-27
Description: In the Linux kernel, the following vulnerability has been resolved:

gpu: host1x: Fix a use of uninitialized mutex

commit c8347f915e67 ("gpu: host1x: Fix boot regression for Tegra")
caused a use of uninitialized mutex leading to below warning when
CONFIG_DEBUG_MUTEXES and CONFIG_DEBUG_LOCK_ALLOC are enabled.

[   41.662843] ------------[ cut here ]------------
[   41.663012] DEBUG_LOCKS_WARN_ON(lock->magic != lock)
[   41.663035] WARNING: CPU: 4 PID: 794 at kernel/locking/mutex.c:587 __mutex_lock+0x670/0x878
[   41.663458] Modules linked in: rtw88_8822c(+) bluetooth(+) rtw88_pci rtw88_core mac80211 aquantia libarc4 crc_itu_t cfg80211 tegra194_cpufreq dwmac_tegra(+) arm_dsu_pmu stmmac_platform stmmac pcs_xpcs rfkill at24 host1x(+) tegra_bpmp_thermal ramoops reed_solomon fuse loop nfnetlink xfs mmc_block rpmb_core ucsi_ccg ina3221 crct10dif_ce xhci_tegra ghash_ce lm90 sha2_ce sha256_arm64 sha1_ce sdhci_tegra pwm_fan sdhci_pltfm sdhci gpio_keys rtc_tegra cqhci mmc_core phy_tegra_xusb i2c_tegra tegra186_gpc_dma i2c_tegra_bpmp spi_tegra114 dm_mirror dm_region_hash dm_log dm_mod
[   41.665078] CPU: 4 UID: 0 PID: 794 Comm: (udev-worker) Not tainted 6.11.0-29.31_[PII_REDACTED].el10.aarch64+debug #1
[   41.665838] Hardware name: NVIDIA NVIDIA Jetson AGX Orin Developer Kit/Jetson, BIOS 36.3.0-gcid-35594366 02/26/2024
[   41.672555] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   41.679636] pc : __mutex_lock+0x670/0x878
[   41.683834] lr : __mutex_lock+0x670/0x878
[   41.688035] sp : ffff800084b77090
[   41.691446] x29: ffff800084b77160 x28: ffffdd4bebf7b000 x27: ffffdd4be96b1000
[   41.698799] x26: 1fffe[PII_REDACTED]c x25: 1ffff0001096ee18 x24: [PII_REDACTED]
[   41.706149] x23: [PII_REDACTED] x22: [PII_REDACTED] x21: ffffdd4be6e3c7a0
[   41.713500] x20: ffff800084b770f0 x19: ffff00011841b1e8 x18: [PII_REDACTED]
[   41.720675] x17: [PII_REDACTED] x16: [PII_REDACTED] x15: [PII_REDACTED]
[   41.728023] x14: [PII_REDACTED] x13: [PII_REDACTED] x12: ffff6001a96eaab3
[   41.735375] x11: 1fffe001a96eaab2 x10: ffff6001a96eaab2 x9 : ffffdd4be4838bbc
[   41.742723] x8 : 00009ffe5691554e x7 : ffff000d4b755593 x6 : [PII_REDACTED]
[   41.749985] x5 : ffff000d4b755590 x4 : 1fffe0001d88f001 x3 : dfff[PII_REDACTED]00
[   41.756988] x2 : [PII_REDACTED] x1 : [PII_REDACTED] x0 : ffff0000ec478000
[   41.764251] Call trace:
[   41.766695]  __mutex_lock+0x670/0x878
[   41.770373]  mutex_lock_nested+0x2c/0x40
[   41.774134]  host1x_intr_start+0x54/0xf8 [host1x]
[   41.778863]  host1x_runtime_resume+0x150/0x228 [host1x]
[   41.783935]  pm_generic_runtime_resume+0x84/0xc8
[   41.788485]  __rpm_callback+0xa0/0x478
[   41.792422]  rpm_callback+0x15c/0x1a8
[   41.795922]  rpm_resume+0x698/0xc08
[   41.799597]  __pm_runtime_resume+0xa8/0x140
[   41.803621]  host1x_probe+0x810/0xbc0 [host1x]
[   41.807909]  platform_probe+0xcc/0x1a8
[   41.811845]  really_probe+0x188/0x800
[   41.815347]  __driver_probe_device+0x164/0x360
[   41.819810]  driver_probe_device+0x64/0x1a8
[   41.823834]  __driver_attach+0x180/0x490
[   41.827773]  bus_for_each_dev+0x104/0x1a0
[   41.831797]  driver_attach+0x44/0x68
[   41.835296]  bus_add_driver+0x23c/0x4e8
[   41.839235]  driver_register+0x15c/0x3a8
[   41.843170]  __platform_register_drivers+0xa4/0x208
[   41.848159]  tegra_host1x_init+0x4c/0xff8 [host1x]
[   41.853147]  do_one_initcall+0xd4/0x380
[   41.856997]  do_init_module+0x1dc/0x698
[   41.860758]  load_module+0xc70/0x1300
[   41.864435]  __do_sys_init_module+0x1a8/0x1d0
[   41.868721]  __arm64_sys_init_module+0x74/0xb0
[   41.873183]  invoke_syscall.constprop.0+0xdc/0x1e8
[   41.877997]  do_el0_svc+0x154/0x1d0
[   41.881671]  el0_svc+0x54/0x140
[   41.884820]  el0t_64_sync_handler+0x120/0x130
[   41.889285]  el0t_64_sync+0x1a4/0x1a8
[   41.892960] irq event stamp: 69737
[   41.896370] hardirqs last  enabled at (69737): [<ffffdd4be6d7768c>] _raw_spin_unlock_irqrestore+0x44/0xe8
[   41.905739] hardirqs last disabled at (69736):
---truncated---
CVSS Score: 5.5 (MEDIUM)
CWE: CWE-908, CWE-908
References: https://git.kernel.org/stable/c/02458fbfaa0170aabf8506f7d4ed054f02414251; https://git.kernel.org/stable/c/127e91638ddcd02b80de92fec2240609a9f90426; https://git.kernel.org/stable/c/396d8e5136b4476672bc15b83ba312486bb4bf76