watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz-executor.5:16215] Modules linked in: irq event stamp: 4170803 hardirqs last enabled at (4170802): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (4170803): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (4156758): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (4156763): [] __irq_exit_rcu+0x11b/0x180 CPU: 1 PID: 16215 Comm: syz-executor.5 Not tainted 6.2.0-rc3-next-20230111 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__kasan_slab_free+0x57/0x190 Code: 89 cb 31 c9 48 01 f0 0f 92 c1 48 29 fa 48 85 c9 48 0f 45 15 fb 33 cb 03 48 01 d0 48 c1 e8 0c 48 c1 e0 06 4c 01 c0 48 8b 50 08 <48> 8d 4a ff f6 c2 01 75 08 48 89 c1 0f 1f 44 00 00 48 8b 01 f6 c4 RSP: 0018:ffff88806cf09c50 EFLAGS: 00000282 RAX: ffffea00005b1280 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888008794dc0 RSI: ffff888016c4a280 RDI: ffff888000000000 RBP: ffffffff834d61bf R08: ffffea0000000000 R09: ffffffff8765592f R10: fffffbfff0ecab25 R11: 0000000000000001 R12: ffff888016c4a280 R13: ffff888008794dc0 R14: 000000000024f2a0 R15: ffff888040900e30 FS: 00007fce416ba700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdb3b6df98 CR3: 000000003c4d0000 CR4: 0000000000350ee0 Call Trace: kmem_cache_free+0xff/0x510 kfree_skbmem+0xef/0x1b0 consume_skb+0xd8/0x170 mac80211_hwsim_tx_frame+0x1f6/0x2a0 mac80211_hwsim_beacon_tx+0x566/0xb10 __iterate_interfaces+0x2d3/0x580 ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xcb0 hrtimer_run_softirq+0x176/0x350 __do_softirq+0x1c7/0x913 __irq_exit_rcu+0x11b/0x180 irq_exit_rcu+0x9/0x30 sysvec_apic_timer_interrupt+0x92/0xc0 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:put_cpu_partial+0x115/0x1c0 Code: 39 43 28 75 61 48 c7 43 28 00 00 00 00 48 c7 c6 50 0b 7d 81 48 89 df e8 09 0c af ff 48 85 ed 74 06 e8 af 81 d3 ff fb 4d 85 ed <74> 21 5b 4c 89 ee 5d 4c 89 e7 41 5c 41 5d 41 5e 41 5f e9 54 fa ff RSP: 0018:ffff888044a27a40 EFLAGS: 00000246 RAX: 00000000003f6d59 RBX: ffff88806cf41770 RCX: ffffffff812b79df RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000200 R08: 0000000000000001 R09: ffffffff8765592f R10: fffffbfff0ecab25 R11: 0000000000000001 R12: ffff888008794dc0 R13: 0000000000000000 R14: ffffea00010a4180 R15: 0000000000000001 qlist_free_all+0x6d/0x1a0 kasan_quarantine_reduce+0x196/0x230 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_bulk+0x36f/0x660 mas_alloc_nodes+0x276/0x8a0 mas_preallocate+0x1bf/0x370 mmap_region+0x766/0x1c20 do_mmap+0x82c/0xf50 do_shmat+0xeb3/0x1180 __x64_sys_shmat+0xd0/0x170 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fce44144b19 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:00007fce416ba188 EFLAGS: 00000246 ORIG_RAX: 000000000000001e RAX: ffffffffffffffda RBX: 00007fce44257f60 RCX: 00007fce44144b19 RDX: 0000000000004000 RSI: 0000000020ff3000 RDI: 0000000000000000 RBP: 00007fce4419ef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffb3ec696f R14: 00007fce416ba300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at default_idle+0xf/0x20 ---------------- Code disassembly (best guess): 0: 89 cb mov %ecx,%ebx 2: 31 c9 xor %ecx,%ecx 4: 48 01 f0 add %rsi,%rax 7: 0f 92 c1 setb %cl a: 48 29 fa sub %rdi,%rdx d: 48 85 c9 test %rcx,%rcx 10: 48 0f 45 15 fb 33 cb cmovne 0x3cb33fb(%rip),%rdx # 0x3cb3413 17: 03 18: 48 01 d0 add %rdx,%rax 1b: 48 c1 e8 0c shr $0xc,%rax 1f: 48 c1 e0 06 shl $0x6,%rax 23: 4c 01 c0 add %r8,%rax 26: 48 8b 50 08 mov 0x8(%rax),%rdx * 2a: 48 8d 4a ff lea -0x1(%rdx),%rcx <-- trapping instruction 2e: f6 c2 01 test $0x1,%dl 31: 75 08 jne 0x3b 33: 48 89 c1 mov %rax,%rcx 36: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 3b: 48 8b 01 mov (%rcx),%rax 3e: f6 .byte 0xf6 3f: c4 .byte 0xc4