syzkaller login: [ 2.525889][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 20.240437][ T467] cgroup: Unknown subsys name 'net'
[ 20.241804][ T467] cgroup: Unknown subsys name 'net_prio'
[ 20.242755][ T467] cgroup: Unknown subsys name 'devices'
[ 20.243975][ T467] cgroup: Unknown subsys name 'blkio'
[ 20.326788][ T467] cgroup: Unknown subsys name 'hugetlb'
[ 20.332930][ T467] cgroup: Unknown subsys name 'rlimit'
[ 20.477093][ T467] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 21.302120][ T470] syz-executor.0 (470) used greatest stack depth: 11944 bytes left
Warning: Permanently added '10.128.1.180' (ED25519) to the list of known hosts.
2024/01/25 14:19:59 ignoring optional flag "sandboxArg"="0"
2024/01/25 14:19:59 parsed 1 programs
2024/01/25 14:19:59 executed programs: 0
[ 39.079956][ T1047] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 40.405850][ C0] hrtimer: interrupt took 15333 ns
[ 41.250052][ T1660] ------------[ cut here ]------------
[ 41.255524][ T1660] unexpected event refcount: 2; ptr=ffff88810bf28fd8
[ 41.262214][ T1660] WARNING: CPU: 1 PID: 1660 at kernel/events/core.c:5165 free_event+0x31/0x40
[ 41.271236][ T1660] Modules linked in:
[ 41.275461][ T1660] CPU: 1 PID: 1660 Comm: syz-executor.0 Not tainted 5.15.147-syzkaller #0
[ 41.283942][ T1660] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
[ 41.293987][ T1660] RIP: 0010:free_event+0x31/0x40
[ 41.298919][ T1660] Code: f0 48 0f b1 97 28 02 00 00 48 83 f8 01 75 05 e9 05 fd ff ff 48 8b b7 28 02 00 00 48 89 fa 48 c7 c7 30 fb 30 82 e8 fa 91 83 00 <0f> 0b c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 41 56 41 55 49 c7 c5
[ 41.318799][ T1660] RSP: 0018:ffffc9000174fcb8 EFLAGS: 00010286
[ 41.324854][ T1660] RAX: 0000000000000000 RBX: dead000000000122 RCX: 00000000ffffdfff
[ 41.332828][ T1660] RDX: 00000000ffffffea RSI: 00000000ffffdfff RDI: 0000000000000001
[ 41.341227][ T1660] RBP: ffff88810bf28fd8 R08: ffffffff82774548 R09: 0000000000000003
[ 41.349197][ T1660] R10: 00000000ffffe000 R11: 3fffffffffffffff R12: ffff88810bf2ba18
[ 41.357426][ T1660] R13: ffff8881013c8754 R14: ffffc9000174fa00 R15: dead000000000100
[ 41.365377][ T1660] FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
[ 41.374494][ T1660] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 41.381080][ T1660] CR2: 00007ffd56eb7258 CR3: 000000010d4eb000 CR4: 00000000003506e0
[ 41.389058][ T1660] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 41.397022][ T1660] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 41.404976][ T1660] Call Trace:
[ 41.408256][ T1660]
[ 41.411226][ T1660] ? __warn+0x7b/0xf0
[ 41.415189][ T1660] ? free_event+0x31/0x40
[ 41.419508][ T1660] ? report_bug+0x9a/0xc0
[ 41.423815][ T1660] ? handle_bug+0x3c/0x60
[ 41.428140][ T1660] ? exc_invalid_op+0x14/0x70
[ 41.432789][ T1660] ? asm_exc_invalid_op+0x16/0x20
[ 41.437805][ T1660] ? free_event+0x31/0x40
[ 41.442109][ T1660] ? free_event+0x31/0x40
[ 41.446430][ T1660] perf_event_release_kernel+0x25f/0x2f0
[ 41.452044][ T1660] perf_release+0xc/0x10
[ 41.456277][ T1660] __fput+0x83/0x250
[ 41.460235][ T1660] task_work_run+0x54/0x80
[ 41.464635][ T1660] do_exit+0x38d/0xae0
[ 41.468694][ T1660] do_group_exit+0x34/0xb0
[ 41.473178][ T1660] get_signal+0xca/0xac0
[ 41.477420][ T1660] arch_do_signal_or_restart+0xf8/0x710
[ 41.483047][ T1660] exit_to_user_mode_prepare+0x116/0x190
[ 41.489111][ T1660] syscall_exit_to_user_mode+0x12/0x30
[ 41.494746][ T1660] ret_from_fork+0x15/0x30
[ 41.499153][ T1660] RIP: 0033:0x7fc181820ce9
[ 41.503625][ T1660] Code: Unable to access opcode bytes at RIP 0x7fc181820cbf.
[ 41.511000][ T1660] RSP: 002b:00007fc1813a3078 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
[ 41.519655][ T1660] RAX: 0000000000000000 RBX: 00007fc18193ff80 RCX: 00007fc181820ce9
[ 41.527841][ T1660] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000200
[ 41.535797][ T1660] RBP: 00007fc18186d47a R08: 0000000000000000 R09: 0000000000000000
[ 41.544125][ T1660] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
[ 41.552431][ T1660] R13: 0000000000000006 R14: 00007fc18193ff80 R15: 00007ffd56eb7048
[ 41.561083][ T1660]
[ 41.564097][ T1660] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 41.571513][ T1660] CPU: 1 PID: 1660 Comm: syz-executor.0 Not tainted 5.15.147-syzkaller #0
[ 41.580234][ T1660] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
[ 41.590339][ T1660] Call Trace:
[ 41.593604][ T1660]
[ 41.596701][ T1660] dump_stack_lvl+0x41/0x5e
[ 41.601461][ T1660] panic+0xfb/0x2ae
[ 41.605240][ T1660] check_panic_on_warn.cold+0xf/0x1e
[ 41.610581][ T1660] __warn+0x87/0xf0
[ 41.614440][ T1660] ? free_event+0x31/0x40
[ 41.618825][ T1660] report_bug+0x9a/0xc0
[ 41.623057][ T1660] handle_bug+0x3c/0x60
[ 41.627179][ T1660] exc_invalid_op+0x14/0x70
[ 41.631759][ T1660] asm_exc_invalid_op+0x16/0x20
[ 41.636658][ T1660] RIP: 0010:free_event+0x31/0x40
[ 41.641649][ T1660] Code: f0 48 0f b1 97 28 02 00 00 48 83 f8 01 75 05 e9 05 fd ff ff 48 8b b7 28 02 00 00 48 89 fa 48 c7 c7 30 fb 30 82 e8 fa 91 83 00 <0f> 0b c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 41 56 41 55 49 c7 c5
[ 41.661219][ T1660] RSP: 0018:ffffc9000174fcb8 EFLAGS: 00010286
[ 41.667242][ T1660] RAX: 0000000000000000 RBX: dead000000000122 RCX: 00000000ffffdfff
[ 41.675374][ T1660] RDX: 00000000ffffffea RSI: 00000000ffffdfff RDI: 0000000000000001
[ 41.683438][ T1660] RBP: ffff88810bf28fd8 R08: ffffffff82774548 R09: 0000000000000003
[ 41.691455][ T1660] R10: 00000000ffffe000 R11: 3fffffffffffffff R12: ffff88810bf2ba18
[ 41.699745][ T1660] R13: ffff8881013c8754 R14: ffffc9000174fa00 R15: dead000000000100
[ 41.707885][ T1660] ? free_event+0x31/0x40
[ 41.712354][ T1660] perf_event_release_kernel+0x25f/0x2f0
[ 41.717955][ T1660] perf_release+0xc/0x10
[ 41.722281][ T1660] __fput+0x83/0x250
[ 41.726231][ T1660] task_work_run+0x54/0x80
[ 41.730792][ T1660] do_exit+0x38d/0xae0
[ 41.734828][ T1660] do_group_exit+0x34/0xb0
[ 41.739295][ T1660] get_signal+0xca/0xac0
[ 41.743570][ T1660] arch_do_signal_or_restart+0xf8/0x710
[ 41.749277][ T1660] exit_to_user_mode_prepare+0x116/0x190
[ 41.754870][ T1660] syscall_exit_to_user_mode+0x12/0x30
[ 41.760289][ T1660] ret_from_fork+0x15/0x30
[ 41.764682][ T1660] RIP: 0033:0x7fc181820ce9
[ 41.769222][ T1660] Code: Unable to access opcode bytes at RIP 0x7fc181820cbf.
[ 41.776692][ T1660] RSP: 002b:00007fc1813a3078 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
[ 41.786302][ T1660] RAX: 0000000000000000 RBX: 00007fc18193ff80 RCX: 00007fc181820ce9
[ 41.794328][ T1660] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000200
[ 41.802405][ T1660] RBP: 00007fc18186d47a R08: 0000000000000000 R09: 0000000000000000
[ 41.810715][ T1660] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
[ 41.818774][ T1660] R13: 0000000000000006 R14: 00007fc18193ff80 R15: 00007ffd56eb7048
[ 41.827145][ T1660]
[ 41.830375][ T1660] Kernel Offset: disabled
[ 41.834774][ T1660] Rebooting in 86400 seconds..