Buffer I/O error on dev loop3, logical block 10, lost async page write syz-executor.3[14604]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=1f24/1/0x4000000000000000 softirq=544251/544252 fqs=38541 rcu: (detected by 1, t=105002 jiffies, g=696213, q=52459 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 14601 Comm: syz-executor.4 Not tainted 6.5.0-rc6-next-20230818 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:default_send_IPI_self+0x5d/0xc0 Code: 1a f3 90 0f b6 45 00 84 c0 74 04 3c 03 7e 66 8b 04 25 00 c3 5f ff f6 c4 10 75 e6 81 cb 00 00 04 00 89 df 89 3c 25 00 c3 5f ff <5b> 5d e9 ec b0 4b 03 bb e8 03 00 00 eb 16 65 ff 05 6a 60 f2 7e bf RSP: 0018:ffff88806ce096d8 EFLAGS: 00000006 RAX: 00000000000400f6 RBX: 00000000000400f6 RCX: 0000000000000100 RDX: ffff888035dfb680 RSI: ffffffff810980c5 RDI: 00000000000400f6 RBP: fffffbffffebf860 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001 R13: ffff88806ce3a5b0 R14: 0000000000000000 R15: 0000000000000008 FS: 00007f541b7a8700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc9a80ab000 CR3: 00000000155e4000 CR4: 0000000000350ef0 Call Trace: arch_irq_work_raise+0x4f/0x70 __irq_work_queue_local+0xc1/0x2f0 irq_work_queue_on+0x122/0x130 __rcu_read_unlock+0x3f0/0x4f0 perf_event_output_forward+0x21c/0x3c0 __perf_event_overflow+0x4c2/0x9e0 perf_swevent_event+0x2c6/0x3f0 perf_tp_event+0x2dd/0x1280 perf_trace_run_bpf_submit+0xf3/0x190 perf_trace_preemptirq_template+0x252/0x420 trace_hardirqs_on+0xce/0x100 asm_sysvec_irq_work+0x1a/0x20 RIP: 0010:__rcu_read_unlock+0xc8/0x4f0 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 76 01 00 00 8b 85 f8 03 00 00 85 c0 75 58 <65> 48 8b 1c 25 80 8d 03 00 48 8d bb f4 03 00 00 48 b8 00 00 00 00 RSP: 0018:ffff88806ce09db8 EFLAGS: 00000202 RAX: 000000000000b894 RBX: ffff88806ce3a580 RCX: 1ffffffff0ba9e21 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81387911 RBP: ffffffff85619b80 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff85d51ad7 R11: 0000000000000001 R12: 0000000000000001 R13: ffffffff831ccb00 R14: 0000000000000200 R15: dffffc0000000000 ieee80211_iterate_active_interfaces_atomic+0x95/0x1c0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x59d/0xb60 hrtimer_run_softirq+0x14c/0x310 __do_softirq+0x1b7/0x7d4 irq_exit_rcu+0x93/0xc0 sysvec_apic_timer_interrupt+0x6e/0x90 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:finish_task_switch.isra.0+0x20d/0x830 Code: 89 ff 48 c7 03 00 00 00 00 e8 7f b4 38 03 4d 85 e4 75 ba 4c 89 ff e8 42 8f 38 03 e8 0d ac 30 00 fb 65 48 8b 1c 25 80 8d 03 00 <48> 8d bb 78 14 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffff888041d6fd58 EFLAGS: 00000202 RAX: 00000000000005df RBX: ffff888035dfb680 RCX: 1ffffffff0ba9e21 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81242233 RBP: ffff888041d6fd98 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff85d51ad7 R11: 0000000000000001 R12: ffff88806ce397d8 R13: ffff888008d99b40 R14: ffff888008d9bb28 R15: ffff88806ce397c0 __schedule+0x9b1/0x2b00 schedule+0xdb/0x1a0 exit_to_user_mode_prepare+0x95/0x180 syscall_exit_to_user_mode+0x1d/0x50 do_syscall_64+0x4c/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7f541e232b19 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:00007f541b7a8188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 0000000000000005 RBX: 00007f541e345f60 RCX: 00007f541e232b19 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000580 RBP: 00007f541e28cf6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce434735f R14: 00007f541b7a8300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 1a f3 sbb %bl,%dh 2: 90 nop 3: 0f b6 45 00 movzbl 0x0(%rbp),%eax 7: 84 c0 test %al,%al 9: 74 04 je 0xf b: 3c 03 cmp $0x3,%al d: 7e 66 jle 0x75 f: 8b 04 25 00 c3 5f ff mov 0xffffffffff5fc300,%eax 16: f6 c4 10 test $0x10,%ah 19: 75 e6 jne 0x1 1b: 81 cb 00 00 04 00 or $0x40000,%ebx 21: 89 df mov %ebx,%edi 23: 89 3c 25 00 c3 5f ff mov %edi,0xffffffffff5fc300 * 2a: 5b pop %rbx <-- trapping instruction 2b: 5d pop %rbp 2c: e9 ec b0 4b 03 jmpq 0x34bb11d 31: bb e8 03 00 00 mov $0x3e8,%ebx 36: eb 16 jmp 0x4e 38: 65 ff 05 6a 60 f2 7e incl %gs:0x7ef2606a(%rip) # 0x7ef260a9 3f: bf .byte 0xbf