[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.11' (ECDSA) to the list of known hosts. 2020/12/27 11:38:40 fuzzer started syzkaller login: [ 55.269681][ T8487] ================================================================================ [ 55.279988][ T8487] UBSAN: invalid-load in kernel/params.c:302:33 [ 55.286757][ T8487] load of value 255 is not a valid value for type '_Bool' [ 55.294528][ T8487] CPU: 0 PID: 8487 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 55.302601][ T8487] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.312674][ T8487] Call Trace: [ 55.315946][ T8487] dump_stack+0x107/0x163 [ 55.320382][ T8487] ubsan_epilogue+0xb/0x5a [ 55.324784][ T8487] __ubsan_handle_load_invalid_value.cold+0x62/0x6c [ 55.331361][ T8487] param_get_bool.cold+0x14/0x19 [ 55.336282][ T8487] param_attr_show+0x14a/0x220 [ 55.341031][ T8487] ? kernel_param_unlock+0x40/0x40 [ 55.346234][ T8487] module_attr_show+0x48/0x70 [ 55.350899][ T8487] ? func_ptr_is_kernel_text+0x80/0x80 [ 55.356347][ T8487] sysfs_kf_seq_show+0x1f8/0x400 [ 55.361271][ T8487] seq_read_iter+0x4d3/0x1220 [ 55.365942][ T8487] seq_read+0x3dd/0x5b0 [ 55.370090][ T8487] ? seq_read_iter+0x1220/0x1220 [ 55.375035][ T8487] ? lock_downgrade+0x6d0/0x6d0 [ 55.379872][ T8487] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 55.386102][ T8487] kernfs_fop_read+0xe9/0x590 [ 55.390762][ T8487] ? rw_verify_area+0x11d/0x350 [ 55.395593][ T8487] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 55.401298][ T8487] vfs_read+0x1b5/0x570 [ 55.405447][ T8487] ksys_read+0x12d/0x250 [ 55.409671][ T8487] ? vfs_write+0xa80/0xa80 [ 55.414068][ T8487] ? syscall_enter_from_user_mode+0x1d/0x50 [ 55.419948][ T8487] do_syscall_64+0x2d/0x70 [ 55.424345][ T8487] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 55.430221][ T8487] RIP: 0033:0x4b117b [ 55.434096][ T8487] Code: ff e9 69 ff ff ff cc cc cc cc cc cc cc cc cc e8 9b c2 f8 ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 55.453693][ T8487] RSP: 002b:000000c0000bb738 EFLAGS: 00000216 ORIG_RAX: 0000000000000000 [ 55.462119][ T8487] RAX: ffffffffffffffda RBX: 000000c000020800 RCX: 00000000004b117b [ 55.470088][ T8487] RDX: 0000000000001200 RSI: 000000c00042f300 RDI: 0000000000000006 [ 55.478072][ T8487] RBP: 000000c0000bb788 R08: 0000000000000001 R09: 0000000000000002 [ 55.486045][ T8487] R10: 0000000000001200 R11: 0000000000000216 R12: ffffffffffffffff [ 55.494001][ T8487] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 [ 55.502445][ T8487] ================================================================================ [ 55.511986][ T8487] Kernel panic - not syncing: panic_on_warn set ... [ 55.518577][ T8487] CPU: 0 PID: 8487 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 55.527322][ T8487] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.537377][ T8487] Call Trace: [ 55.540647][ T8487] dump_stack+0x107/0x163 [ 55.545030][ T8487] panic+0x343/0x77f [ 55.548911][ T8487] ? __warn_printk+0xf3/0xf3 [ 55.553495][ T8487] ? ubsan_epilogue+0x3e/0x5a [ 55.558235][ T8487] ubsan_epilogue+0x54/0x5a [ 55.562731][ T8487] __ubsan_handle_load_invalid_value.cold+0x62/0x6c [ 55.569336][ T8487] param_get_bool.cold+0x14/0x19 [ 55.574352][ T8487] param_attr_show+0x14a/0x220 [ 55.579099][ T8487] ? kernel_param_unlock+0x40/0x40 [ 55.584198][ T8487] module_attr_show+0x48/0x70 [ 55.588858][ T8487] ? func_ptr_is_kernel_text+0x80/0x80 [ 55.594299][ T8487] sysfs_kf_seq_show+0x1f8/0x400 [ 55.599225][ T8487] seq_read_iter+0x4d3/0x1220 [ 55.603896][ T8487] seq_read+0x3dd/0x5b0 [ 55.608038][ T8487] ? seq_read_iter+0x1220/0x1220 [ 55.612964][ T8487] ? lock_downgrade+0x6d0/0x6d0 [ 55.617800][ T8487] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 55.624033][ T8487] kernfs_fop_read+0xe9/0x590 [ 55.628697][ T8487] ? rw_verify_area+0x11d/0x350 [ 55.633531][ T8487] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 55.639151][ T8487] vfs_read+0x1b5/0x570 [ 55.643297][ T8487] ksys_read+0x12d/0x250 [ 55.647531][ T8487] ? vfs_write+0xa80/0xa80 [ 55.651931][ T8487] ? syscall_enter_from_user_mode+0x1d/0x50 [ 55.657808][ T8487] do_syscall_64+0x2d/0x70 [ 55.662210][ T8487] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 55.668091][ T8487] RIP: 0033:0x4b117b [ 55.671971][ T8487] Code: ff e9 69 ff ff ff cc cc cc cc cc cc cc cc cc e8 9b c2 f8 ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 55.691759][ T8487] RSP: 002b:000000c0000bb738 EFLAGS: 00000216 ORIG_RAX: 0000000000000000 [ 55.700171][ T8487] RAX: ffffffffffffffda RBX: 000000c000020800 RCX: 00000000004b117b [ 55.708152][ T8487] RDX: 0000000000001200 RSI: 000000c00042f300 RDI: 0000000000000006 [ 55.716117][ T8487] RBP: 000000c0000bb788 R08: 0000000000000001 R09: 0000000000000002 [ 55.724093][ T8487] R10: 0000000000001200 R11: 0000000000000216 R12: ffffffffffffffff [ 55.732051][ T8487] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 [ 55.743993][ T8487] Kernel Offset: disabled [ 55.748440][ T8487] Rebooting in 86400 seconds..