rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-....: (1 GPs behind) idle=ba7/1/0x4000000000000002 softirq=11919/11920 fqs=4967 (detected by 0, t=10502 jiffies, g=13937, q=3337) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8753 Comm: syz-executor.5 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_preemption_disabled+0x4/0x170 lib/smp_processor_id.c:13 Code: 00 00 e8 6f 46 61 f8 65 48 8b 3c 25 40 70 02 00 e8 11 4b 18 f8 eb 99 0f 1f 44 00 00 0f 0b e9 23 ff ff ff cc cc cc 41 56 41 55 <49> 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 0d 58 c7 RSP: 0018:ffffc90000dc0ba8 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000034700 RCX: 0000000000000100 RDX: ffff888024eeba00 RSI: ffffffff89e51060 RDI: ffffffff89e510a0 RBP: 0000000000000014 R08: 0000000000002000 R09: ffff8880b9d3aa53 R10: ffffffff817fa712 R11: 0000000000000000 R12: ffffc90000dc0c70 R13: ffffc90000dc0c80 R14: ffffffff89400d42 R15: ffffc90000dc0cc0 FS: 00007f7c5b49b700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa893f51000 CR3: 0000000079790000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_swevent_get_recursion_context+0x19/0x140 kernel/events/core.c:9434 perf_trace_buf_alloc+0x38/0x260 kernel/trace/trace_event_perf.c:407 perf_trace_preemptirq_template+0x128/0x460 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle include/trace/events/preemptirq.h:40 [inline] trace_irq_enable_rcuidle include/trace/events/preemptirq.h:40 [inline] trace_hardirqs_on+0x156/0x1c0 kernel/trace/trace_preemptirq.c:44 asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:664 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__rcu_read_unlock+0xc4/0x570 kernel/rcu/tree_plugin.h:425 Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e b6 01 00 00 8b 85 40 04 00 00 85 c0 75 54 <65> 48 8b 1c 25 40 70 02 00 48 8d bb 3c 04 00 00 48 b8 00 00 00 00 RSP: 0018:ffffc90000dc0dc0 EFLAGS: 00000206 RAX: 0000000000000006 RBX: ffff8880b9d3a900 RCX: 1ffffffff1ae1611 RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000 RBP: ffffffff8b98c780 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817e0ba2 R11: 0000000000000000 R12: 0000000000000001 R13: ffffffff8539aa00 R14: 0000000000000200 R15: ffffffff853958c0 rcu_read_unlock include/linux/rcupdate.h:720 [inline] ieee80211_iterate_active_interfaces_atomic+0x92/0x180 net/mac80211/util.c:831 mac80211_hwsim_beacon+0xcd/0x1c0 drivers/net/wireless/mac80211_hwsim.c:1861 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__kasan_kmalloc+0x0/0xd0 mm/kasan/common.c:521 Code: a7 ff 0f b6 cb 44 89 e2 89 c6 48 89 e7 e8 c8 8d 35 02 48 81 c4 00 02 00 00 5b 41 5c c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <41> 55 49 89 d5 41 54 49 89 fc 55 89 cd 81 e1 00 04 00 00 53 48 89 RSP: 0018:ffffc9000292fbe0 EFLAGS: 00000282 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000c40 RDX: 0000000000001000 RSI: ffff8880254c8000 RDI: ffff888010c42140 RBP: 0000000000000000 R08: 0000000000000c40 R09: ffff8880254c8000 R10: 0000000000000001 R11: 00000000ffffffff R12: ffff88806b0d1d60 R13: ffff8880784a2790 R14: ffffc9000292fd28 R15: 0000000000001000 kmalloc include/linux/slab.h:595 [inline] tomoyo_realpath_from_path+0xc3/0x620 security/tomoyo/realpath.c:254 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x1d5/0x590 security/tomoyo/file.c:723 security_file_ioctl+0x50/0xb0 security/security.c:1541 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0xb3/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f7c5df46ae9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7c5b49b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7c5e05a020 RCX: 00007f7c5df46ae9 RDX: 0000000020000040 RSI: 0000000040082404 RDI: 0000000000000005 RBP: 00007f7c5dfa0f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc083458f R14: 00007f7c5b49b300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: e8 6f 46 61 f8 callq 0xf8614676 7: 65 48 8b 3c 25 40 70 mov %gs:0x27040,%rdi e: 02 00 10: e8 11 4b 18 f8 callq 0xf8184b26 15: eb 99 jmp 0xffffffb0 17: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 1c: 0f 0b ud2 1e: e9 23 ff ff ff jmpq 0xffffff46 23: cc int3 24: cc int3 25: cc int3 26: 41 56 push %r14 28: 41 55 push %r13 * 2a: 49 89 f5 mov %rsi,%r13 <-- trapping instruction 2d: 41 54 push %r12 2f: 55 push %rbp 30: 48 89 fd mov %rdi,%rbp 33: 53 push %rbx 34: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 39: 65 gs 3a: 44 rex.R 3b: 8b .byte 0x8b 3c: 25 .byte 0x25 3d: 0d .byte 0xd 3e: 58 pop %rax 3f: c7 .byte 0xc7