watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.6:7645] Modules linked in: irq event stamp: 4345735 hardirqs last enabled at (4345734): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (4345735): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (4338572): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (4338575): [] __irq_exit_rcu+0x11b/0x180 CPU: 1 PID: 7645 Comm: syz-executor.6 Not tainted 6.1.0-next-20221214 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:stack_trace_save+0x94/0xd0 Code: 38 81 89 74 24 28 48 8d 74 24 20 89 54 24 2c 48 c7 44 24 30 00 00 00 00 65 48 8b 14 25 00 89 03 00 e8 80 68 d3 ff 8b 44 24 30 <48> c7 03 00 00 00 00 c7 43 08 00 00 00 00 48 8b 4c 24 78 65 48 2b RSP: 0018:ffff88806cf097a0 EFLAGS: 00000292 RAX: 000000000000001d RBX: ffffed100d9e12f4 RCX: ffff88806cf09610 RDX: 1ffff11008b0f12a RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88800844f780 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000092a20 R13: 0000000000092a20 R14: 0000000000092a20 R15: 0000000000000170 FS: 00007f47edc7d700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d422000 CR3: 000000001853c000 CR4: 0000000000350ee0 Call Trace: kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 __kasan_slab_alloc+0x5c/0x70 kmem_cache_alloc+0x1e1/0x410 __create_object+0x3d/0xc10 kmem_cache_alloc_node+0x283/0x420 __alloc_skb+0x21a/0x310 __netdev_alloc_skb+0x76/0x3e0 __ieee80211_beacon_get+0x3d9/0x1310 ieee80211_beacon_get_tim+0x99/0x4f0 mac80211_hwsim_beacon_tx+0x1d2/0xab0 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x74/0x180 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xc70 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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:filter_irq_stacks+0x35/0x90 Code: 48 83 ec 08 85 f6 74 30 48 bd 00 00 00 00 00 fc ff df 31 db 48 89 f8 48 c1 e8 03 80 3c 28 00 75 53 48 8b 07 48 3d 10 02 60 84 <72> 1c 48 3d 10 16 60 84 73 14 44 8d 63 01 48 83 c4 08 44 89 e0 5b RSP: 0018:ffff8880488dfb20 EFLAGS: 00000283 RAX: ffffffff846000ae RBX: 0000000000000005 RCX: 0000000000002dc0 RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8880488dfbe0 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000006 R13: 0000000000000001 R14: 0000000000002dc0 R15: ffff8880488dfbb8 __stack_depot_save+0x3e/0x4e0 kasan_save_stack+0x35/0x50 kasan_set_track+0x25/0x30 __kasan_kmalloc+0x82/0x90 do_seccomp+0x2f8/0x2860 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f47f0707b19 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:00007f47edc7d188 EFLAGS: 00000246 ORIG_RAX: 000000000000013d RAX: ffffffffffffffda RBX: 00007f47f081af60 RCX: 00007f47f0707b19 RDX: 0000000020000040 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 00007f47f0761f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc1a99b4ff R14: 00007f47edc7d300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7682 Comm: syz-executor.3 Not tainted 6.1.0-next-20221214 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__sanitizer_cov_trace_pc+0x20/0x70 Code: 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 8b 05 2d 5f ba 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 00 89 03 00 00 01 ff 00 74 0e 85 c9 74 35 8b 82 0c 14 00 00 85 c0 74 2b 8b RSP: 0018:ffff88806ce09910 EFLAGS: 00000006 RAX: 0000000000010102 RBX: 0000000000000000 RCX: 0000000000000100 RDX: ffff888010c3d040 RSI: ffffffff813d1165 RDI: 0000000000000005 RBP: 00000063c7501e6a R08: 0000000000000005 R09: 0000000000000004 R10: 0000000000000003 R11: 0000000000000001 R12: ffff88806ce28100 R13: 0000000000000003 R14: 0000000000000000 R15: ffff88806ce2b840 FS: 00007f8c32c5a700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8c32c39718 CR3: 000000001ba74000 CR4: 0000000000350ef0 Call Trace: tick_program_event+0x95/0x150 hrtimer_interrupt+0x36a/0x770 __sysvec_apic_timer_interrupt+0x148/0x500 sysvec_apic_timer_interrupt+0x3f/0xc0 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:__build_skb_around+0x12a/0x3a0 Code: 00 00 4c 89 ab d8 00 00 00 48 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 1e 02 00 00 <48> 8d bb cc 00 00 00 48 b8 00 00 00 00 00 fc ff df c7 83 c8 00 00 RSP: 0018:ffff88806ce09ac0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff8880193c18c0 RCX: ffffffff834bc41c RDX: 1ffff11003278331 RSI: 0000000000000004 RDI: ffff8880193c1988 RBP: ffff8880193c19a4 R08: 0000000000000001 R09: ffff8880193c19a7 R10: ffffed1003278334 R11: 0000000000000001 R12: 00000000000000c0 R13: ffff88801e2d5400 R14: 0000000000000a20 R15: ffff88801e2d5400 __alloc_skb+0x129/0x310 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/0xc70 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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:unwind_next_frame+0x348/0x2130 Code: 8e c7 15 00 00 41 c6 46 40 01 49 c7 c0 80 4b 4c 85 48 b8 00 00 00 00 00 fc ff df 4d 8d 48 04 4c 89 ca 48 c1 ea 03 0f b6 04 02 <4c> 89 ca 83 e2 07 38 d0 7f 08 84 c0 0f 85 e4 14 00 00 41 0f b6 40 RSP: 0018:ffff888048187520 EFLAGS: 00000216 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff818a28c3 RDX: 1ffffffff0c20cd4 RSI: ffffffff86106692 RDI: ffffffff85dce808 RBP: ffff8880481875f8 R08: ffffffff8610669e R09: ffffffff861066a2 R10: ffffed1009030ec1 R11: 0000000000038001 R12: ffff8880481875e1 R13: ffff888048187600 R14: ffff8880481875a0 R15: ffffffff818a28c3 arch_stack_walk+0x87/0xf0 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 __kasan_slab_alloc+0x5c/0x70 kmem_cache_alloc+0x1e1/0x410 __create_object+0x3d/0xc10 kmem_cache_alloc+0x273/0x410 jbd2__journal_start+0x194/0x6b0 __ext4_journal_start_sb+0x4a5/0x6b0 ext4_dirty_inode+0xa5/0x130 __mark_inode_dirty+0x1aa/0xe70 generic_update_time+0x21b/0x2b0 file_modified_flags+0x2d4/0x330 ext4_buffered_write_iter+0xf9/0x460 ext4_file_write_iter+0x3ff/0x1930 vfs_write+0xa4f/0xe40 ksys_write+0x12b/0x260 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f8c356e4b19 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:00007f8c32c5a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f8c357f7f60 RCX: 00007f8c356e4b19 RDX: 00000000000292e9 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007f8c3573ef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcc281c0cf R14: 00007f8c32c5a300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 38 81 89 74 24 28 cmp %al,0x28247489(%rcx) 6: 48 8d 74 24 20 lea 0x20(%rsp),%rsi b: 89 54 24 2c mov %edx,0x2c(%rsp) f: 48 c7 44 24 30 00 00 movq $0x0,0x30(%rsp) 16: 00 00 18: 65 48 8b 14 25 00 89 mov %gs:0x38900,%rdx 1f: 03 00 21: e8 80 68 d3 ff callq 0xffd368a6 26: 8b 44 24 30 mov 0x30(%rsp),%eax * 2a: 48 c7 03 00 00 00 00 movq $0x0,(%rbx) <-- trapping instruction 31: c7 43 08 00 00 00 00 movl $0x0,0x8(%rbx) 38: 48 8b 4c 24 78 mov 0x78(%rsp),%rcx 3d: 65 gs 3e: 48 rex.W 3f: 2b .byte 0x2b