watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz-executor.5:16237] Modules linked in: irq event stamp: 20835657 hardirqs last enabled at (20835656): [] irqentry_exit+0x3b/0x80 kernel/entry/common.c:435 hardirqs last disabled at (20835657): [] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1076 softirqs last enabled at (159092): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (159092): [] __do_softirq+0x597/0x8de kernel/softirq.c:582 softirqs last disabled at (159095): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last disabled at (159095): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last disabled at (159095): [] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 CPU: 0 PID: 16237 Comm: syz-executor.5 Not tainted 6.7.0-rc3-syzkaller-00841-g7489723c2e26 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1f/0x60 kernel/kcov.c:207 Code: 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 48 8b 14 25 c0 bc 03 00 65 8b 05 b4 26 7c 7e a9 00 01 ff 00 48 8b 34 24 74 0f c4 01 74 35 8b 82 fc 15 00 00 85 c0 74 2b 8b 82 d8 15 00 00 83 RSP: 0018:ffffc900000074f8 EFLAGS: 00000206 RAX: 0000000000000103 RBX: ffffffff8f99a820 RCX: ffffffff8139ebf4 RDX: ffff8880251f3b80 RSI: ffffffff8139ec11 RDI: 0000000000000006 RBP: ffffffff8f99a81c R08: 0000000000000006 R09: ffffffff8a83af59 R10: ffffffff8a83ad52 R11: 0000000000000002 R12: ffffffff8a83af59 R13: ffffffff8a83ad52 R14: dffffc0000000000 R15: ffffffff8f99a81c FS: 00007ff8575276c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31421000 CR3: 0000000082d47000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __orc_find+0xe1/0x130 arch/x86/kernel/unwind_orc.c:109 orc_find arch/x86/kernel/unwind_orc.c:227 [inline] unwind_next_frame+0x329/0x2390 arch/x86/kernel/unwind_orc.c:494 arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826 slab_free mm/slub.c:3809 [inline] kmem_cache_free+0xf8/0x350 mm/slub.c:3831 kfree_skbmem+0x166/0x1b0 net/core/skbuff.c:1036 tcp_wmem_free_skb include/net/tcp.h:312 [inline] tcp_write_queue_purge+0x186/0xd60 net/ipv4/tcp.c:2960 tcp_write_err net/ipv4/tcp_timer.c:79 [inline] tcp_write_timeout net/ipv4/tcp_timer.c:295 [inline] tcp_retransmit_timer+0x10ce/0x4050 net/ipv4/tcp_timer.c:577 tcp_write_timer_handler net/ipv4/tcp_timer.c:693 [inline] tcp_write_timer_handler+0x55a/0xa50 net/ipv4/tcp_timer.c:667 tcp_write_timer+0xa6/0x2b0 net/ipv4/tcp_timer.c:710 call_timer_fn+0x193/0x590 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb20 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x21a/0x8de kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x14/0x60 kernel/kcov.c:207 Code: 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 48 8b 14 25 c0 bc 03 00 65 8b 05 b4 26 7c 7e 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 fc 15 00 00 RSP: 0018:ffffc90005a67820 EFLAGS: 00000202 RAX: 0000000080000001 RBX: ffffc90005a67900 RCX: ffffc90005222000 RDX: ffff8880251f3b80 RSI: ffffffff813a07c9 RDI: ffffc90005a67908 RBP: ffffc90005a678f8 R08: 0000000000000004 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90005a60000 R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000001 on_stack arch/x86/include/asm/stacktrace.h:56 [inline] unwind_next_frame+0x11d7/0x2390 arch/x86/kernel/unwind_orc.c:665 __unwind_start+0x5a4/0x880 arch/x86/kernel/unwind_orc.c:760 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xaf/0x170 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492 __call_rcu_common.constprop.0+0x9a/0x7a0 kernel/rcu/tree.c:2681 perf_event_alloc+0x1f1e/0x3f00 kernel/events/core.c:12071 __do_sys_perf_event_open+0x46e/0x2b10 kernel/events/core.c:12482 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7ff85687cba9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff8575270c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007ff85699bf80 RCX: 00007ff85687cba9 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000020000080 RBP: 00007ff8568c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ff85699bf80 R15: 00007ffef0998c68 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 16234 Comm: syz-executor.4 Not tainted 6.7.0-rc3-syzkaller-00841-g7489723c2e26 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:127 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:178 [inline] RIP: 0010:kasan_check_range+0x10d/0x190 mm/kasan/generic.c:187 Code: 00 00 7c 0b 44 89 c2 e8 71 ed ff ff 83 f0 01 5b 5d 41 5c c3 48 85 d2 74 4f 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 41 80 38 00 <74> f2 eb b6 41 bc 08 00 00 00 45 29 dc 49 8d 14 2c eb 0c 48 83 c0 RSP: 0018:ffffc900001efd40 EFLAGS: 00000046 RAX: fffffbfff23e2fd1 RBX: fffffbfff23e2fd2 RCX: ffffffff81672fbe RDX: fffffbfff23e2fd2 RSI: 0000000000000008 RDI: ffffffff91f17e88 RBP: fffffbfff23e2fd1 R08: 0000000000000000 R09: fffffbfff23e2fd1 R10: ffffffff91f17e8f R11: 0000000000000005 R12: ffff888025092948 R13: 0000000000000002 R14: 000000000000004f R15: 000000000000004f FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31325000 CR3: 000000002ad26000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] hlock_class+0x4e/0x130 kernel/locking/lockdep.c:228 __lock_acquire+0xc65/0x3b20 kernel/locking/lockdep.c:5134 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 seqcount_lockdep_reader_access include/linux/seqlock.h:102 [inline] timekeeping_get_delta kernel/time/timekeeping.c:254 [inline] timekeeping_get_ns kernel/time/timekeeping.c:388 [inline] ktime_get+0x12c/0x490 kernel/time/timekeeping.c:848 hrtimer_forward_now include/linux/hrtimer.h:506 [inline] perf_swevent_hrtimer+0x226/0x3e0 kernel/events/core.c:11038 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x647/0xc20 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline] __sysvec_apic_timer_interrupt+0x105/0x400 arch/x86/kernel/apic/apic.c:1082 sysvec_apic_timer_interrupt+0x43/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:__sanitizer_cov_trace_switch+0x40/0x90 kernel/kcov.c:341 Code: 48 83 f8 20 74 63 77 44 48 83 f8 08 74 53 48 83 f8 10 75 2f 41 bd 03 00 00 00 4c 8b 75 00 31 db 4d 85 f6 74 1e 48 8b 74 dd 10 <4c> 89 e2 4c 89 ef 48 83 c3 01 48 8b 4c 24 28 e8 2c fe ff ff 49 39 RSP: 0018:ffffc900001f0490 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff813a04ea RDX: ffff888025091dc0 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffffff8ac9d440 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000005 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000003 R15: 0000000000000001 unwind_next_frame+0xeaa/0x2390 arch/x86/kernel/unwind_orc.c:641 arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826 slab_free mm/slub.c:3809 [inline] kmem_cache_free+0xf8/0x350 mm/slub.c:3831 skb_kfree_head net/core/skbuff.c:948 [inline] skb_kfree_head net/core/skbuff.c:945 [inline] skb_free_head+0x17f/0x1b0 net/core/skbuff.c:962 skb_release_data+0x5ba/0x870 net/core/skbuff.c:992 skb_release_all net/core/skbuff.c:1058 [inline] __kfree_skb+0x51/0x70 net/core/skbuff.c:1072 tcp_wmem_free_skb include/net/tcp.h:312 [inline] tcp_rtx_queue_purge net/ipv4/tcp.c:2949 [inline] tcp_write_queue_purge+0x63b/0xd60 net/ipv4/tcp.c:2962 tcp_write_err net/ipv4/tcp_timer.c:79 [inline] tcp_write_timeout net/ipv4/tcp_timer.c:295 [inline] tcp_retransmit_timer+0x10ce/0x4050 net/ipv4/tcp_timer.c:577 tcp_write_timer_handler net/ipv4/tcp_timer.c:693 [inline] tcp_write_timer_handler+0x55a/0xa50 net/ipv4/tcp_timer.c:667 tcp_write_timer+0xa6/0x2b0 net/ipv4/tcp_timer.c:710 call_timer_fn+0x193/0x590 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb20 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x21a/0x8de kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:_compound_head+0x2b/0x130 include/linux/page-flags.h:247 Code: 54 55 53 48 89 fb e8 64 19 bf ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e8 00 00 00 <4c> 8b 63 08 31 ff 4c 89 e5 83 e5 01 48 89 ee e8 c1 14 bf ff 48 85 RSP: 0018:ffffc90004dcf6d8 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffea0000a97c00 RCX: ffffc90004dcfae8 RDX: 1ffffd4000152f81 RSI: ffffffff81c87c9c RDI: ffffea0000a97c08 RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000001 R13: ffff88801c9fe198 R14: dffffc0000000000 R15: 0000000000000007 PageAnon include/linux/page-flags.h:657 [inline] zap_pte_range mm/memory.c:1452 [inline] zap_pmd_range mm/memory.c:1582 [inline] zap_pud_range mm/memory.c:1611 [inline] zap_p4d_range mm/memory.c:1632 [inline] unmap_page_range+0x1109/0x2b50 mm/memory.c:1653 unmap_single_vma+0x194/0x2b0 mm/memory.c:1699 unmap_vmas+0x229/0x470 mm/memory.c:1743 exit_mmap+0x1ad/0xa70 mm/mmap.c:3308 __mmput+0x12a/0x4d0 kernel/fork.c:1349 mmput+0x62/0x70 kernel/fork.c:1371 exit_mm kernel/exit.c:567 [inline] do_exit+0x9ad/0x2ae0 kernel/exit.c:858 do_group_exit+0xd4/0x2a0 kernel/exit.c:1021 get_signal+0x23be/0x2790 kernel/signal.c:2904 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x121/0x240 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0xa/0x40 kernel/entry/common.c:309 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0033:0x7f875de7cba9 Code: Unable to access opcode bytes at 0x7f875de7cb7f. RSP: 002b:00007f875ecc2178 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00007f875df9bf88 RCX: 00007f875de7cba9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f875df9bf88 RBP: 00007f875df9bf80 R08: 00007f875ecc26c0 R09: 00007f875ecc26c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f875df9bf8c R13: 000000000000000b R14: 00007fff8fc8b5b0 R15: 00007fff8fc8b698