[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.167' (ECDSA) to the list of known hosts. 2020/12/27 12:21:41 fuzzer started syzkaller login: [ 54.059337][ T8457] ================================================================================ [ 54.068923][ T8457] UBSAN: invalid-load in kernel/params.c:302:33 [ 54.075711][ T8457] load of value 255 is not a valid value for type '_Bool' [ 54.082978][ T8457] CPU: 0 PID: 8457 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 54.090941][ T8457] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.100987][ T8457] Call Trace: [ 54.104382][ T8457] dump_stack+0x107/0x163 [ 54.108779][ T8457] ubsan_epilogue+0xb/0x5a [ 54.113177][ T8457] __ubsan_handle_load_invalid_value.cold+0x62/0x6c [ 54.119752][ T8457] param_get_bool.cold+0x14/0x19 [ 54.124674][ T8457] param_attr_show+0x14a/0x220 [ 54.129421][ T8457] ? kernel_param_unlock+0x40/0x40 [ 54.134514][ T8457] module_attr_show+0x48/0x70 [ 54.139172][ T8457] ? func_ptr_is_kernel_text+0x80/0x80 [ 54.144608][ T8457] sysfs_kf_seq_show+0x1f8/0x400 [ 54.149546][ T8457] seq_read_iter+0x4d3/0x1220 [ 54.154743][ T8457] seq_read+0x3dd/0x5b0 [ 54.158881][ T8457] ? seq_read_iter+0x1220/0x1220 [ 54.163812][ T8457] ? lock_downgrade+0x6d0/0x6d0 [ 54.168661][ T8457] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 54.174890][ T8457] kernfs_fop_read+0xe9/0x590 [ 54.179552][ T8457] ? rw_verify_area+0x11d/0x350 [ 54.184386][ T8457] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 54.190004][ T8457] vfs_read+0x1b5/0x570 [ 54.194163][ T8457] ksys_read+0x12d/0x250 [ 54.198402][ T8457] ? vfs_write+0xa80/0xa80 [ 54.202799][ T8457] ? syscall_enter_from_user_mode+0x1d/0x50 [ 54.208677][ T8457] do_syscall_64+0x2d/0x70 [ 54.213072][ T8457] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 54.218950][ T8457] RIP: 0033:0x4b117b [ 54.222838][ T8457] 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 [ 54.242427][ T8457] RSP: 002b:000000c0000ab738 EFLAGS: 00000216 ORIG_RAX: 0000000000000000 [ 54.250820][ T8457] RAX: ffffffffffffffda RBX: 000000c000020800 RCX: 00000000004b117b [ 54.258770][ T8457] RDX: 0000000000001200 RSI: 000000c0003a3300 RDI: 0000000000000006 [ 54.266723][ T8457] RBP: 000000c0000ab788 R08: 0000000000000001 R09: 0000000000000002 [ 54.274674][ T8457] R10: 0000000000001200 R11: 0000000000000216 R12: ffffffffffffffff [ 54.282624][ T8457] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 [ 54.292011][ T8457] ================================================================================ [ 54.301474][ T8457] Kernel panic - not syncing: panic_on_warn set ... [ 54.308037][ T8457] CPU: 0 PID: 8457 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 54.316028][ T8457] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.326082][ T8457] Call Trace: [ 54.329351][ T8457] dump_stack+0x107/0x163 [ 54.333689][ T8457] panic+0x343/0x77f [ 54.337569][ T8457] ? __warn_printk+0xf3/0xf3 [ 54.342151][ T8457] ? ubsan_epilogue+0x3e/0x5a [ 54.346814][ T8457] ubsan_epilogue+0x54/0x5a [ 54.351298][ T8457] __ubsan_handle_load_invalid_value.cold+0x62/0x6c [ 54.357872][ T8457] param_get_bool.cold+0x14/0x19 [ 54.362794][ T8457] param_attr_show+0x14a/0x220 [ 54.367558][ T8457] ? kernel_param_unlock+0x40/0x40 [ 54.372660][ T8457] module_attr_show+0x48/0x70 [ 54.377322][ T8457] ? func_ptr_is_kernel_text+0x80/0x80 [ 54.382782][ T8457] sysfs_kf_seq_show+0x1f8/0x400 [ 54.387711][ T8457] seq_read_iter+0x4d3/0x1220 [ 54.392382][ T8457] seq_read+0x3dd/0x5b0 [ 54.396535][ T8457] ? seq_read_iter+0x1220/0x1220 [ 54.401463][ T8457] ? lock_downgrade+0x6d0/0x6d0 [ 54.406297][ T8457] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 54.412526][ T8457] kernfs_fop_read+0xe9/0x590 [ 54.417188][ T8457] ? rw_verify_area+0x11d/0x350 [ 54.422042][ T8457] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 54.427673][ T8457] vfs_read+0x1b5/0x570 [ 54.431820][ T8457] ksys_read+0x12d/0x250 [ 54.436048][ T8457] ? vfs_write+0xa80/0xa80 [ 54.440470][ T8457] ? syscall_enter_from_user_mode+0x1d/0x50 [ 54.446456][ T8457] do_syscall_64+0x2d/0x70 [ 54.450855][ T8457] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 54.456778][ T8457] RIP: 0033:0x4b117b [ 54.460652][ T8457] 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 [ 54.480347][ T8457] RSP: 002b:000000c0000ab738 EFLAGS: 00000216 ORIG_RAX: 0000000000000000 [ 54.488745][ T8457] RAX: ffffffffffffffda RBX: 000000c000020800 RCX: 00000000004b117b [ 54.496696][ T8457] RDX: 0000000000001200 RSI: 000000c0003a3300 RDI: 0000000000000006 [ 54.504819][ T8457] RBP: 000000c0000ab788 R08: 0000000000000001 R09: 0000000000000002 [ 54.512770][ T8457] R10: 0000000000001200 R11: 0000000000000216 R12: ffffffffffffffff [ 54.520721][ T8457] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 [ 54.532347][ T8457] Kernel Offset: disabled [ 54.536736][ T8457] Rebooting in 86400 seconds..