watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.1:9594] Modules linked in: irq event stamp: 4390533 hardirqs last enabled at (4390532): [<ffffffff8460144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (4390533): [<ffffffff843fe0af>] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (4374758): [<ffffffff8118443b>] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (4374761): [<ffffffff8118443b>] __irq_exit_rcu+0x11b/0x180 CPU: 1 PID: 9594 Comm: syz-executor.1 Not tainted 6.1.0-rc8-next-20221207 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:___slab_alloc+0x1d4/0x1080 Code: 75 28 0f 85 22 04 00 00 49 c7 45 28 00 00 00 00 48 c7 c6 62 df 7c 81 4c 89 ef e8 67 4d af ff 48 83 3c 24 00 0f 85 53 01 00 00 <48> 83 7b 18 00 0f 84 ef 04 00 00 9c 41 5d fa 41 81 e5 00 02 00 00 RSP: 0018:ffff88806cf098c0 EFLAGS: 00000206 RAX: 000000000042fe6c RBX: ffff88806cf3d880 RCX: ffffffff812b8edf RDX: 0000000000000000 RSI: 0000000000000103 RDI: 0000000000000000 RBP: ffff88800844f780 R08: 0000000000000001 R09: ffffffff8762e90f R10: fffffbfff0ec5d21 R11: 0000000000000001 R12: 00000000ffffffff R13: ffff88806cf3d8a0 R14: ffff88804511d040 R15: 0000000000000000 FS: 00007fe0701d7700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556021c58 CR3: 000000000cc96000 CR4: 0000000000350ee0 Call Trace: <IRQ> __slab_alloc.constprop.0+0x4d/0x90 kmem_cache_alloc+0x356/0x410 __create_object+0x3d/0xc10 __kmem_cache_alloc_node+0x25b/0x400 __kmalloc_node_track_caller+0x43/0xb0 __alloc_skb+0xe9/0x310 skb_copy+0x13d/0x3d0 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb6d/0x1360 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x566/0xab0 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x74/0x180 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xba0 hrtimer_run_softirq+0x176/0x350 __do_softirq+0x1c7/0x8f9 __irq_exit_rcu+0x11b/0x180 irq_exit_rcu+0x9/0x30 sysvec_apic_timer_interrupt+0x92/0xc0 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:rcu_is_watching+0x5/0xb0 Code: 49 00 eb dc e8 8c a6 49 00 eb 99 e8 95 a5 49 00 e9 50 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 53 <48> 83 ec 08 65 ff 05 c8 c8 cf 7e e8 1b 3c 0c 03 48 c7 c3 00 4f 03 RSP: 0018:ffff88804695ee58 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff812c2d7c RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff85d07c10 RBP: 1ffff11008d2bdd1 R08: 0000000000000000 R09: ffffffff85d07c17 R10: fffffbfff0ba0f82 R11: 0000000000000001 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 rcu_read_lock_sched_held+0x24/0x80 lock_release+0x54b/0x750 __filemap_get_folio+0x276/0xc90 pagecache_get_page+0x2e/0x130 __find_get_block+0x447/0xc00 __getblk_gfp+0x2c/0x80 __ext4_get_inode_loc+0x4ab/0x13b0 ext4_get_inode_loc+0xbe/0x160 ext4_reserve_inode_write+0xce/0x280 ext4_xattr_set_handle+0x40f/0x14e0 ext4_initxattrs+0xb9/0x120 security_inode_init_security+0x1ab/0x360 __ext4_new_inode+0x39a9/0x55e0 ext4_create+0x2e4/0x4e0 lookup_open.isra.0+0xed0/0x1250 path_openat+0x946/0x29b0 do_filp_open+0x1ba/0x410 do_sys_openat2+0x171/0x4c0 __x64_sys_openat+0x143/0x200 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fe072c61b19 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:00007fe0701d7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fe072d74f60 RCX: 00007fe072c61b19 RDX: 0000000000141042 RSI: 0000000020000100 RDI: ffffffffffffff9c RBP: 00007fe072cbbf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffecb12c57f R14: 00007fe0701d7300 R15: 0000000000022000 </TASK> 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: 75 28 jne 0x2a 2: 0f 85 22 04 00 00 jne 0x42a 8: 49 c7 45 28 00 00 00 movq $0x0,0x28(%r13) f: 00 10: 48 c7 c6 62 df 7c 81 mov $0xffffffff817cdf62,%rsi 17: 4c 89 ef mov %r13,%rdi 1a: e8 67 4d af ff callq 0xffaf4d86 1f: 48 83 3c 24 00 cmpq $0x0,(%rsp) 24: 0f 85 53 01 00 00 jne 0x17d * 2a: 48 83 7b 18 00 cmpq $0x0,0x18(%rbx) <-- trapping instruction 2f: 0f 84 ef 04 00 00 je 0x524 35: 9c pushfq 36: 41 5d pop %r13 38: fa cli 39: 41 81 e5 00 02 00 00 and $0x200,%r13d