rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=7dbc/1/0x4000000000000000 softirq=18306/18314 fqs=0
rcu: (detected by 1, t=10502 jiffies, g=10821, q=99 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6200 Comm: dhcpcd-run-hook Not tainted 6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:-1 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3822 [inline]
RIP: 0010:validate_chain+0xac/0x24e0 kernel/locking/lockdep.c:3877
Code: e8 19 36 e3 ff 90 0f 0b 90 90 90 48 bd eb 83 b5 80 46 86 c8 61 48 0f af eb 48 c1 ed 2d 48 8b 04 ed f0 96 28 94 48 85 c0 74 1c <48> 83 c0 f8 74 16 48 8b 48 18 48 39 d9 0f 84 cf 01 00 00 48 8b 40
RSP: 0018:ffffc90000007a50 EFLAGS: 00000086
RAX: ffffffff946cb3e8 RBX: bc101d9a73125dae RCX: 0000000000040000
RDX: 0000000000000001 RSI: ffff88807bfd6568 RDI: ffff88807bfd5a00
RBP: 000000000001dd63 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff93651020 R14: ffff88807bfd5a00 R15: ffff88807bfd6568
FS: 0000000000000000(0000) GS:ffff888124fcf000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbf0b68dd58 CR3: 000000007bef8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235
lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1795 [inline]
__hrtimer_run_queues+0x67b/0xd40 kernel/time/hrtimer.c:1855
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1917
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:kasan_check_range+0x1bc/0x2a0 mm/kasan/generic.c:189
Code: 8d 5d 07 48 85 ed 48 0f 49 dd 48 83 e3 f8 48 29 dd 74 12 41 80 3b 00 0f 85 b3 00 00 00 49 ff c3 48 ff cd 75 ee 5b 41 5c 41 5e <41> 5f 5d c3 cc cc cc cc 40 84 ed 75 61 f7 c5 00 ff 00 00 75 5e f7
RSP: 0018:ffffc900049bf2e8 EFLAGS: 00000256
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: ffffffff8221a834
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea0001dab180
RBP: 0000000000000000 R08: ffffea0001dab187 R09: 1ffffd40003b5630
R10: dffffc0000000000 R11: fffff940003b5631 R12: dffffc0000000000
R13: ffffea0001dab180 R14: ffffea0001dab188 R15: fffff940003b5631
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
folio_test_swapcache include/linux/page-flags.h:585 [inline]
free_swap_cache+0xe4/0x3e0 mm/swap_state.c:227
free_pages_and_swap_cache+0x1d4/0x6a0 mm/swap_state.c:260
__tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:397 [inline]
tlb_flush_mmu+0x3a9/0x690 mm/mmu_gather.c:404
tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:496
exit_mmap+0x5b1/0xde0 mm/mmap.c:1297
__mmput+0x115/0x410 kernel/fork.c:1379
exec_mmap+0x791/0x880 fs/exec.c:1009
begin_new_exec+0x12b0/0x2100 fs/exec.c:1265
load_elf_binary+0x9a2/0x28a0 fs/binfmt_elf.c:1001
search_binary_handler fs/exec.c:1773 [inline]
exec_binprm fs/exec.c:1805 [inline]
bprm_execve+0x97b/0x1440 fs/exec.c:1857
do_execveat_common+0x57c/0x710 fs/exec.c:1964
do_execve fs/exec.c:2038 [inline]
__do_sys_execve fs/exec.c:2114 [inline]
__se_sys_execve fs/exec.c:2109 [inline]
__x64_sys_execve+0x94/0xb0 fs/exec.c:2109
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd32f771ef7
Code: Unable to access opcode bytes at 0x7fd32f771ecd.
RSP: 002b:00007fffb36a8cc8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 0000558566bb1e28 RCX: 00007fd32f771ef7
RDX: 0000558566bb1e48 RSI: 0000558566bb1e28 RDI: 0000558566bb1ed0
RBP: 0000558566bb1ed0 R08: 0000558566bb1ed5 R09: 00007fffb36aae93
R10: 0000000000000008 R11: 0000000000000246 R12: 0000558566bb1e48
R13: 00007fd32f91f904 R14: 0000558566bb1e48 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10502 jiffies! g10821 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:26688 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_timeout+0x15b/0x2b0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2e1/0x1340 kernel/rcu/tree.c:2046
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2248
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 6201 Comm: syz-executor.0 Not tainted 6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:194 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:217
Code: 08 10 65 93 65 8b 15 38 ca a1 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 <83> fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48 8d 7e 01 8b 89 1c
RSP: 0018:ffffc90004a7f7b8 EFLAGS: 00000246
RAX: ffffffff81b7679d RBX: 1ffff110170c8219 RCX: ffff888031b39e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004a7f9b0 R08: ffffffff81b76768 R09: 1ffffffff20bd2ce
R10: dffffc0000000000 R11: ffffffff816b5a60 R12: ffff8880b873ab88
R13: ffff8880b86410c8 R14: ffff8880b873ab80 R15: 0000000000000000
FS: 00007fbf0b68d6c0(0000) GS:ffff8881250cf000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd32f8245e8 CR3: 000000006f788000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
csd_lock_wait kernel/smp.c:340 [inline]
smp_call_function_many_cond+0x1bcd/0x2d40 kernel/smp.c:885
clock_was_set+0x766/0x820 kernel/time/hrtimer.c:978
timekeeping_inject_offset+0x40c/0x550 kernel/time/timekeeping.c:1434
do_adjtimex+0x62f/0xbd0 kernel/time/timekeeping.c:2564
do_clock_adjtime kernel/time/posix-timers.c:1170 [inline]
__do_sys_clock_adjtime kernel/time/posix-timers.c:1182 [inline]
__se_sys_clock_adjtime kernel/time/posix-timers.c:1173 [inline]
__x64_sys_clock_adjtime+0x1e3/0x2a0 kernel/time/posix-timers.c:1173
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbf0a87cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbf0b68d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007fbf0a99c050 RCX: 00007fbf0a87cae9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007fbf0a8c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fbf0a99c050 R15: 00007fff6f201618