watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.6:8132] Modules linked in: irq event stamp: 2814891 hardirqs last enabled at (2814890): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2814891): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2814018): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2814033): [] irq_exit_rcu+0x94/0xc0 CPU: 0 UID: 0 PID: 8132 Comm: syz-executor.6 Not tainted 6.12.0-rc3-next-20241016 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x0/0x2490 Code: e9 09 ff ff ff e8 70 a9 76 00 e9 67 ff ff ff e8 66 a9 76 00 e9 3a ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 41 57 48 89 fa 49 89 ff RSP: 0018:ffff88806ce08e80 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffffff813e8f70 RCX: ffffffff8678c301 RDX: 1ffff1100d9c1209 RSI: ffffffff84821f90 RDI: ffff88806ce08e88 RBP: ffff88806ce08f20 R08: ffffffff8678c3ac R09: ffff88806ce08ec8 R10: 000000000003c001 R11: 0000000000007fe9 R12: ffff88806ce08f50 R13: 0000000000000000 R14: ffff888014deb700 R15: ffffffff845e995c FS: 00007f7e8aac9700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc9949cfa8 CR3: 000000003b29c000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x87/0xf0 stack_trace_save+0x8f/0xc0 kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 __kasan_kmalloc+0x7f/0x90 __kmalloc_noprof+0x1f7/0x4b0 ieee802_11_parse_elems_full+0xec/0x15a0 ieee80211_inform_bss+0xf7/0x10b0 cfg80211_inform_single_bss_data+0x7fe/0x1c50 cfg80211_inform_bss_data+0x20f/0x3510 cfg80211_inform_bss_frame_data+0x250/0x690 ieee80211_bss_info_update+0x2f6/0xa90 ieee80211_scan_rx+0x474/0xac0 ieee80211_rx_list+0x21ec/0x2cf0 ieee80211_rx_napi+0xdc/0x3b0 ieee80211_handle_queued_frames+0xd9/0x130 tasklet_action_common+0x235/0x3b0 handle_softirqs+0x1b1/0x770 irq_exit_rcu+0x94/0xc0 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:put_cpu_partial+0x10a/0x1b0 Code: 24 28 75 5b 49 c7 44 24 28 00 00 00 00 4c 89 e7 48 8d 35 00 00 00 00 e8 b4 ff ab ff 4d 85 ed 74 06 e8 ca 7f d5 ff fb 4d 85 f6 <74> 1c 5b 4c 89 f6 48 89 ef 5d 41 5c 41 5d 41 5e e9 c1 fa ff ff 44 RSP: 0018:ffff88803d12f740 EFLAGS: 00000282 RAX: 00000000002af04f RBX: ffffea0000a724c0 RCX: 1ffffffff0fdca53 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8183f876 RBP: ffff888008c4f780 R08: 0000000000000001 R09: fffffbfff0fda9d9 R10: ffffffff87ed4ecf R11: 00000000000007e0 R12: ffff88806ce40350 R13: 0000000000000200 R14: ffffea00003bd740 R15: ffff888029c93000 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19c/0x230 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 __alloc_object+0x2f/0x270 __create_object+0x1d/0x80 __kmalloc_noprof+0x37e/0x4b0 kmalloc_array_noprof+0x42/0x70 iter_file_splice_write+0x1a2/0x1060 direct_splice_actor+0x192/0x7a0 splice_direct_to_actor+0x348/0x9d0 do_splice_direct+0x17a/0x250 do_sendfile+0xaf1/0xe40 __x64_sys_sendfile64+0x1d5/0x210 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7e8d574b19 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:00007f7e8aac9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f7e8d688020 RCX: 00007f7e8d574b19 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 RBP: 00007f7e8d5cef6d R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000ffffc R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff59d389af R14: 00007f7e8aac9300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0x1e/0x30 9pnet_virtio: no channels available for device syz 9pnet_virtio: no channels available for device syz 9pnet_virtio: no channels available for device syz 9pnet_virtio: no channels available for device syz 9pnet_virtio: no channels available for device syz syz-executor.2 calls setitimer() with new_value NULL pointer. Misfeature support will be removed syz-executor.1 (8273) used greatest stack depth: 23440 bytes left loop6: detected capacity change from 0 to 128 loop4: detected capacity change from 0 to 512 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir264778406/syzkaller.5XFU4V/47/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop4: detected capacity change from 0 to 512 workqueue: Failed to create a rescuer kthread for wq "ext4-rsv-conversion": -EINTR EXT4-fs: failed to create workqueue EXT4-fs (loop4): mount failed loop4: detected capacity change from 0 to 512 audit: type=1400 audit(1729201851.645:10): avc: denied { write } for pid=8370 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir264778406/syzkaller.5XFU4V/49/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop4: detected capacity change from 0 to 512 ---------------- Code disassembly (best guess): 0: e9 09 ff ff ff jmpq 0xffffff0e 5: e8 70 a9 76 00 callq 0x76a97a a: e9 67 ff ff ff jmpq 0xffffff76 f: e8 66 a9 76 00 callq 0x76a97a 14: e9 3a ff ff ff jmpq 0xffffff53 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 90 nop 28: 90 nop 29: 90 nop * 2a: f3 0f 1e fa endbr64 <-- trapping instruction 2e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 35: fc ff df 38: 41 57 push %r15 3a: 48 89 fa mov %rdi,%rdx 3d: 49 89 ff mov %rdi,%r15