tasks_rcu_exit_srcu_stall: rcu_tasks grace period number 33 (since boot) gp_state: RTGS_POST_SCAN_TASKLIST is 20462 jiffies old. Please check any exiting tasks stuck between calls to exit_tasks_rcu_start() and exit_tasks_rcu_finish() watchdog: BUG: soft lockup - CPU#0 stuck for 25s! [syz-executor.1:10502] Modules linked in: irq event stamp: 5448577 hardirqs last enabled at (5448576): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (5448577): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (5443412): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (5443415): [] irq_exit_rcu+0x93/0xc0 CPU: 0 PID: 10502 Comm: syz-executor.1 Not tainted 6.5.0-rc7-next-20230822 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:write_comp_data+0x10/0x90 Code: f6 85 0f 03 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 49 89 f1 49 89 d2 49 89 f8 65 8b 05 18 03 b6 7e <89> c6 81 e6 00 01 00 00 65 48 8b 14 25 80 8d 03 00 a9 00 01 ff 00 RSP: 0018:ffff88806ce09760 EFLAGS: 00000246 RAX: 0000000000000101 RBX: ffffffff813c0da0 RCX: ffffffff810c5f4f RDX: ffffffff8119ab83 RSI: 0000000000000000 RDI: 0000000000000007 RBP: ffff88806ce09808 R08: 0000000000000007 R09: 0000000000000000 R10: ffffffff8119ab83 R11: 1ffff1100d9c69d4 R12: ffffffff8119ab83 R13: ffff88806ce09838 R14: ffff88803d6e0000 R15: ffff88806ce09808 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 000000000ca6a000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0xaf/0x160 stack_trace_save+0x90/0xd0 set_track_prepare+0x74/0xd0 __create_object+0x3b2/0xc90 kmem_cache_alloc_node+0x23d/0x3b0 kmalloc_reserve+0x169/0x270 __alloc_skb+0x129/0x330 skb_copy+0x13d/0x3f0 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb11/0x1330 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x427/0x730 __iterate_interfaces+0x2d3/0x580 ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 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:__sanitizer_cov_trace_pc+0xb/0x70 Code: c0 e9 d9 7f 0f 03 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 8b 05 fd fc b5 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 8d 03 00 a9 RSP: 0018:ffff88804099f4a8 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff88804099f4d0 RCX: ffffffff8113b33c RDX: ffff88803d6e0000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001 R13: ffff88804099f5a0 R14: ffff88803d6e0000 R15: ffff88804099f570 unwind_get_return_address+0x59/0xe0 arch_stack_walk+0xa2/0x160 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 kasan_save_free_info+0x2b/0x50 __kasan_slab_free+0x10a/0x190 kmem_cache_free+0x10d/0x4d0 ___pte_free_tlb+0x1d/0x1b0 free_pgd_range+0x7be/0x1330 free_pgtables+0x5c8/0x830 exit_mmap+0x333/0x9b0 mmput+0xd5/0x390 do_exit+0x99f/0x2740 do_group_exit+0xd4/0x2a0 get_signal+0x2693/0x2720 arch_do_signal_or_restart+0x81/0x790 exit_to_user_mode_prepare+0xeb/0x180 syscall_exit_to_user_mode+0x1d/0x50 do_syscall_64+0x4c/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7fd7c15d7b19 Code: Unable to access opcode bytes at 0x7fd7c15d7aef. RSP: 002b:00007fd7beb4d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: 0000000000000008 RBX: 00007fd7c16eaf60 RCX: 00007fd7c15d7b19 RDX: 0000000000105802 RSI: 00000000200001c0 RDI: ffffffffffffff9c RBP: 00007fd7c1631f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb410404f R14: 00007fd7beb4d300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.5.0-rc7-next-20230822 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:queued_spin_lock_slowpath+0x128/0xb20 Code: 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 5c 09 00 00 48 81 c4 88 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 8a 21 00 00 f3 90 71 ff ff ff 44 8b 74 24 48 41 81 fe 00 01 00 00 0f 84 e4 00 00 RSP: 0018:ffff88806cf09a38 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff845cee3b RDX: fffffbfff0b4e579 RSI: 0000000000000004 RDI: ffffffff85a72bc0 RBP: ffffffff85a72bc0 R08: 0000000000000000 R09: fffffbfff0b4e578 R10: ffffffff85a72bc3 R11: 0000000000000001 R12: 0000000000000003 R13: fffffbfff0b4e578 R14: 0000000000000001 R15: 1ffff1100d9e1348 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fde1612750 CR3: 000000000d27e000 CR4: 0000000000350ee0 Call Trace: do_raw_spin_lock+0x1e0/0x270 mac80211_hwsim_tx_frame_no_nl.isra.0+0x6e7/0x1330 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x427/0x730 __iterate_interfaces+0x2d3/0x580 ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 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:default_idle+0x1e/0x30 Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 eb 0c 0f 1f 44 00 00 0f 00 2d b9 fa 27 00 0f 1f 44 00 00 fb f4 e9 6c 7d 02 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 RSP: 0018:ffff888008de7e70 EFLAGS: 00000206 RAX: 00000000001f7d63 RBX: 0000000000000001 RCX: ffffffff845a832e RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81299b05 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100d9e6a08 R10: ffff88806cf35043 R11: 0000000000000001 R12: ffffffff85d52290 R13: 1ffff110011bcfd3 R14: 0000000000000000 R15: 0000000000000000 default_idle_call+0x67/0xa0 do_idle+0x305/0x3c0 cpu_startup_entry+0x18/0x20 start_secondary+0x1bf/0x220 secondary_startup_64_no_verify+0x178/0x17b ---------------- Code disassembly (best guess): 0: f6 85 0f 03 66 0f 1f testb $0x1f,0xf66030f(%rbp) 7: 44 00 00 add %r8b,(%rax) a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 49 89 f1 mov %rsi,%r9 1d: 49 89 d2 mov %rdx,%r10 20: 49 89 f8 mov %rdi,%r8 23: 65 8b 05 18 03 b6 7e mov %gs:0x7eb60318(%rip),%eax # 0x7eb60342 * 2a: 89 c6 mov %eax,%esi <-- trapping instruction 2c: 81 e6 00 01 00 00 and $0x100,%esi 32: 65 48 8b 14 25 80 8d mov %gs:0x38d80,%rdx 39: 03 00 3b: a9 00 01 ff 00 test $0xff0100,%eax