R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000001 R14: 00007f6321db5fa0 R15: 00007ffe22b74df8
</TASK>
======================================================
WARNING: possible circular locking dependency detected
6.16.0-rc1-syzkaller-00239-g08215f5486ec #0 Not tainted
------------------------------------------------------
syz.3.1033/10895 is trying to acquire lock:
ffff888078bdd5b8 (&ima_iint_mutex_key[depth]){+.+.}-{4:4}, at: process_measurement+0x7e0/0x23e0 security/integrity/ima/ima_main.c:279
but task is already holding lock:
ffffffff8f510a48 (dpm_list_mtx){+.+.}-{4:4}, at: device_pm_lock drivers/base/power/main.c:114 [inline]
ffffffff8f510a48 (dpm_list_mtx){+.+.}-{4:4}, at: dpm_for_each_dev drivers/base/power/main.c:2221 [inline]
ffffffff8f510a48 (dpm_list_mtx){+.+.}-{4:4}, at: dpm_for_each_dev+0x2d/0xb0 drivers/base/power/main.c:2214
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (dpm_list_mtx){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:602 [inline]
__mutex_lock+0x199/0xb90 kernel/locking/mutex.c:747
device_pm_add+0x87/0x3e0 drivers/base/power/main.c:138
device_add+0x9cd/0x1a70 drivers/base/core.c:3655
device_create_groups_vargs+0x1f8/0x270 drivers/base/core.c:4374
device_create+0xed/0x130 drivers/base/core.c:4413
msr_device_create+0x31/0x70 arch/x86/kernel/msr.c:251
cpuhp_invoke_callback+0x3d5/0xa10 kernel/cpu.c:194
cpuhp_thread_fun+0x47e/0x6f0 kernel/cpu.c:1104
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:164
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
-> #3 (cpuhp_state-up){+.+.}-{0:0}:
cpuhp_lock_acquire kernel/cpu.c:103 [inline]
cpuhp_thread_fun+0x193/0x6f0 kernel/cpu.c:1081
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:164
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
-> #2 (cpu_hotplug_lock){++++}-{0:0}:
percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
percpu_down_read include/linux/percpu-rwsem.h:77 [inline]
cpus_read_lock+0x42/0x160 kernel/cpu.c:490
class_cpus_read_lock_constructor include/linux/cpuhplock.h:47 [inline]
ring_buffer_resize+0x105/0x15c0 kernel/trace/ring_buffer.c:2852
__tracing_resize_ring_buffer.part.0+0x52/0x1f0 kernel/trace/trace.c:6040
__tracing_resize_ring_buffer kernel/trace/trace.c:6034 [inline]
tracing_update_buffers+0x102/0x130 kernel/trace/trace.c:6272
ftrace_event_write+0x14a/0x290 kernel/trace/trace_events.c:1505
vfs_write+0x2a0/0x1150 fs/read_write.c:684
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #1 (trace_types_lock){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:602 [inline]
__mutex_lock+0x199/0xb90 kernel/locking/mutex.c:747
class_mutex_constructor include/linux/mutex.h:225 [inline]
trace_array_get kernel/trace/trace.c:612 [inline]
tracing_check_open_get_tr.part.0+0x45/0x130 kernel/trace/trace.c:660
tracing_check_open_get_tr kernel/trace/trace.c:654 [inline]
tracing_open_file_tr+0x9a/0x220 kernel/trace/trace.c:4812
do_dentry_open+0x741/0x1c10 fs/open.c:964
vfs_open+0x82/0x3f0 fs/open.c:1094
dentry_open+0x71/0xd0 fs/open.c:1117
ima_calc_file_hash+0x2b6/0x490 security/integrity/ima/ima_crypto.c:553
ima_collect_measurement+0x897/0xa40 security/integrity/ima/ima_api.c:293
process_measurement+0x11fa/0x23e0 security/integrity/ima/ima_main.c:385
ima_file_check+0xc5/0x110 security/integrity/ima/ima_main.c:613
security_file_post_open+0x8e/0x210 security/security.c:3130
do_open fs/namei.c:3889 [inline]
path_openat+0x1404/0x2cb0 fs/namei.c:4046
do_filp_open+0x20b/0x470 fs/namei.c:4073
do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x174/0x210 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (&ima_iint_mutex_key[depth]){+.+.}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain kernel/locking/lockdep.c:3911 [inline]
__lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240
lock_acquire kernel/locking/lockdep.c:5871 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
__mutex_lock_common kernel/locking/mutex.c:602 [inline]
__mutex_lock+0x199/0xb90 kernel/locking/mutex.c:747
process_measurement+0x7e0/0x23e0 security/integrity/ima/ima_main.c:279
ima_file_check+0xc5/0x110 security/integrity/ima/ima_main.c:613
security_file_post_open+0x8e/0x210 security/security.c:3130
do_open fs/namei.c:3889 [inline]
path_openat+0x1404/0x2cb0 fs/namei.c:4046
do_file_open_root+0x322/0x610 fs/namei.c:4098
file_open_root+0x2a7/0x450 fs/open.c:1416
kernel_read_file_from_path_initns+0x189/0x260 fs/kernel_read_file.c:163
fw_get_filesystem_firmware drivers/base/firmware_loader/main.c:549 [inline]
_request_firmware+0x744/0x1470 drivers/base/firmware_loader/main.c:890
request_firmware drivers/base/firmware_loader/main.c:966 [inline]
cache_firmware drivers/base/firmware_loader/main.c:1304 [inline]
__async_dev_cache_fw_image+0xb1/0x340 drivers/base/firmware_loader/main.c:1418
async_schedule_node_domain+0xd4/0x120 kernel/async.c:221
async_schedule_domain include/linux/async.h:72 [inline]
dev_cache_fw_image+0x38e/0x490 drivers/base/firmware_loader/main.c:1474
dpm_for_each_dev drivers/base/power/main.c:2223 [inline]
dpm_for_each_dev+0x5a/0xb0 drivers/base/power/main.c:2214
device_cache_fw_images drivers/base/firmware_loader/main.c:1524 [inline]
fw_pm_notify+0x81/0x150 drivers/base/firmware_loader/main.c:1575
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
notifier_call_chain_robust kernel/notifier.c:120 [inline]
blocking_notifier_call_chain_robust kernel/notifier.c:345 [inline]
blocking_notifier_call_chain_robust+0xc8/0x160 kernel/notifier.c:333
pm_notifier_call_chain_robust+0x27/0x60 kernel/power/main.c:102
snapshot_open+0x218/0x2b0 kernel/power/user.c:87
misc_open+0x35d/0x420 drivers/char/misc.c:161
chrdev_open+0x234/0x6a0 fs/char_dev.c:414
do_dentry_open+0x741/0x1c10 fs/open.c:964
vfs_open+0x82/0x3f0 fs/open.c:1094
do_open fs/namei.c:3887 [inline]
path_openat+0x1de4/0x2cb0 fs/namei.c:4046
do_filp_open+0x20b/0x470 fs/namei.c:4073
do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x174/0x210 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
&ima_iint_mutex_key[depth] --> cpuhp_state-up --> dpm_list_mtx
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(dpm_list_mtx);
lock(cpuhp_state-up);
lock(dpm_list_mtx);
lock(&ima_iint_mutex_key[depth]);
*** DEADLOCK ***
5 locks held by syz.3.1033/10895:
#0: ffffffff8f303ea8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x63/0x420 drivers/char/misc.c:125
#1: ffffffff8e487ba8 (system_transition_mutex){+.+.}-{4:4}, at: lock_system_sleep+0x87/0xa0 kernel/power/main.c:56
#2: ffffffff8e4c8350 ((pm_chain_head).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain_robust kernel/notifier.c:344 [inline]
#2: ffffffff8e4c8350 ((pm_chain_head).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain_robust+0xa8/0x160 kernel/notifier.c:333
#3: ffffffff8f516048 (fw_lock){+.+.}-{4:4}, at: device_cache_fw_images drivers/base/firmware_loader/main.c:1522 [inline]
#3: ffffffff8f516048 (fw_lock){+.+.}-{4:4}, at: fw_pm_notify+0x69/0x150 drivers/base/firmware_loader/main.c:1575
#4: ffffffff8f510a48 (dpm_list_mtx){+.+.}-{4:4}, at: device_pm_lock drivers/base/power/main.c:114 [inline]
#4: ffffffff8f510a48 (dpm_list_mtx){+.+.}-{4:4}, at: dpm_for_each_dev drivers/base/power/main.c:2221 [inline]
#4: ffffffff8f510a48 (dpm_list_mtx){+.+.}-{4:4}, at: dpm_for_each_dev+0x2d/0xb0 drivers/base/power/main.c:2214
stack backtrace:
CPU: 0 UID: 0 PID: 10895 Comm: syz.3.1033 Not tainted 6.16.0-rc1-syzkaller-00239-g08215f5486ec #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2046
check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2178
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain kernel/locking/lockdep.c:3911 [inline]
__lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240
lock_acquire kernel/locking/lockdep.c:5871 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
__mutex_lock_common kernel/locking/mutex.c:602 [inline]
__mutex_lock+0x199/0xb90 kernel/locking/mutex.c:747
process_measurement+0x7e0/0x23e0 security/integrity/ima/ima_main.c:279
ima_file_check+0xc5/0x110 security/integrity/ima/ima_main.c:613
security_file_post_open+0x8e/0x210 security/security.c:3130
do_open fs/namei.c:3889 [inline]
path_openat+0x1404/0x2cb0 fs/namei.c:4046
do_file_open_root+0x322/0x610 fs/namei.c:4098
file_open_root+0x2a7/0x450 fs/open.c:1416
kernel_read_file_from_path_initns+0x189/0x260 fs/kernel_read_file.c:163
fw_get_filesystem_firmware drivers/base/firmware_loader/main.c:549 [inline]
_request_firmware+0x744/0x1470 drivers/base/firmware_loader/main.c:890
request_firmware drivers/base/firmware_loader/main.c:966 [inline]
cache_firmware drivers/base/firmware_loader/main.c:1304 [inline]
__async_dev_cache_fw_image+0xb1/0x340 drivers/base/firmware_loader/main.c:1418
async_schedule_node_domain+0xd4/0x120 kernel/async.c:221
async_schedule_domain include/linux/async.h:72 [inline]
dev_cache_fw_image+0x38e/0x490 drivers/base/firmware_loader/main.c:1474
dpm_for_each_dev drivers/base/power/main.c:2223 [inline]
dpm_for_each_dev+0x5a/0xb0 drivers/base/power/main.c:2214
device_cache_fw_images drivers/base/firmware_loader/main.c:1524 [inline]
fw_pm_notify+0x81/0x150 drivers/base/firmware_loader/main.c:1575
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
notifier_call_chain_robust kernel/notifier.c:120 [inline]
blocking_notifier_call_chain_robust kernel/notifier.c:345 [inline]
blocking_notifier_call_chain_robust+0xc8/0x160 kernel/notifier.c:333
pm_notifier_call_chain_robust+0x27/0x60 kernel/power/main.c:102
snapshot_open+0x218/0x2b0 kernel/power/user.c:87
misc_open+0x35d/0x420 drivers/char/misc.c:161
chrdev_open+0x234/0x6a0 fs/char_dev.c:414
do_dentry_open+0x741/0x1c10 fs/open.c:964
vfs_open+0x82/0x3f0 fs/open.c:1094
do_open fs/namei.c:3887 [inline]
path_openat+0x1de4/0x2cb0 fs/namei.c:4046
do_filp_open+0x20b/0x470 fs/namei.c:4073
do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x174/0x210 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6321b8e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6322920038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f6321db5fa0 RCX: 00007f6321b8e929
RDX: 0000000000180b01 RSI: 0000200000000000 RDI: ffffffffffffff9c
RBP: 00007f6322920090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000001 R14: 00007f6321db5fa0 R15: 00007ffe22b74df8
</TASK>
(NULL device *): loading /lib/firmware/regulatory.db failed with error -12
(NULL device *): Direct firmware load for regulatory.db failed with error -12
(NULL device *): Falling back to sysfs fallback for: regulatory.db