Hello, syzbot found the following issue on: HEAD commit: 5925fa68 Merge tag 'perf-tools-fixes-for-v5.9-2020-09-16' .. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14b72f01900000 kernel config: https://syzkaller.appspot.com/x/.config?x=c61f6bd349c981f3 dashboard link: https://syzkaller.appspot.com/bug?extid=735579fbeb0c09a90cfa compiler: gcc (GCC) 10.1.0-syz 20200507 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+735579fbeb0c09a90cfa@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 1 PID: 14586 at kernel/rcu/srcutree.c:389 cleanup_srcu_struct+0x23b/0x2d0 kernel/rcu/srcutree.c:408 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 14586 Comm: syz-executor.5 Not tainted 5.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x198/0x1fd lib/dump_stack.c:118 panic+0x347/0x7c0 kernel/panic.c:231 __warn.cold+0x20/0x46 kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:cleanup_srcu_struct+0x23b/0x2d0 kernel/rcu/srcutree.c:389 Code: 84 24 98 04 00 00 00 00 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f 0b 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 <0f> 0b e9 36 ff ff ff 48 8b 3c 24 e8 45 88 53 00 e9 b7 fe ff ff 48 RSP: 0018:ffffc90018f27a18 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff839a9211 RDX: ffff88804f2de100 RSI: ffffffff839a92c3 RDI: 0000000000000006 RBP: 0000000000000001 R08: 0000000000000040 R09: 0000000000000001 R10: 0000000000000040 R11: 0000000000000000 R12: ffffc900057b3020 R13: ffffc900057a9000 R14: ffff88806cfbf000 R15: ffffc900057b2840 kvm_destroy_vm+0x777/0xbe0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:882 kvm_put_kvm arch/x86/kvm/../../../virt/kvm/kvm_main.c:899 [inline] kvm_vm_release+0xac/0xe0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:922 __fput+0x285/0x920 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:141 exit_task_work include/linux/task_work.h:25 [inline] do_exit+0xb7d/0x29f0 kernel/exit.c:806 do_group_exit+0x125/0x310 kernel/exit.c:903 get_signal+0x428/0x1f00 kernel/signal.c:2757 arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:159 [inline] exit_to_user_mode_prepare+0x1ae/0x200 kernel/entry/common.c:190 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:278 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:572 RIP: 0033:0x41221c Code: Bad RIP value. RSP: 002b:00007ffe0eb2c660 EFLAGS: 00000202 RAX: 0000000036b92991 RBX: 000000003787d99d RCX: 0000001b2da20000 RDX: 0000000036b92991 RSI: 0000000000000991 RDI: ffffffff36b92991 RBP: 0000000000001914 R08: 0000000036b92991 R09: 0000000036b92995 R10: 00007ffe0eb2c7d0 R11: 0000000000000246 R12: 000000000118cfc8 R13: 00007fb1a8045008 R14: 00007fb1a8045000 R15: 000000000003ce98 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
