[ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. Starting Load/Save RF Kill Switch Status... [ 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 Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.10' (ECDSA) to the list of known hosts. 2020/12/27 12:04:22 fuzzer started syzkaller login: [ 53.074866][ T8488] ================================================================================ [ 53.085078][ T8488] UBSAN: invalid-load in kernel/params.c:302:33 [ 53.092121][ T8488] load of value 255 is not a valid value for type '_Bool' [ 53.099908][ T8488] CPU: 0 PID: 8488 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 53.107867][ T8488] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.118084][ T8488] Call Trace: [ 53.121342][ T8488] dump_stack+0x107/0x163 [ 53.125671][ T8488] ubsan_epilogue+0xb/0x5a [ 53.130410][ T8488] __ubsan_handle_load_invalid_value.cold+0x62/0x6c [ 53.137380][ T8488] param_get_bool.cold+0x14/0x19 [ 53.142301][ T8488] param_attr_show+0x14a/0x220 [ 53.147321][ T8488] ? kernel_param_unlock+0x40/0x40 [ 53.152585][ T8488] module_attr_show+0x48/0x70 [ 53.157239][ T8488] ? func_ptr_is_kernel_text+0x80/0x80 [ 53.162679][ T8488] sysfs_kf_seq_show+0x1f8/0x400 [ 53.167598][ T8488] seq_read_iter+0x4d3/0x1220 [ 53.172265][ T8488] seq_read+0x3dd/0x5b0 [ 53.176398][ T8488] ? seq_read_iter+0x1220/0x1220 [ 53.181326][ T8488] ? lock_downgrade+0x6d0/0x6d0 [ 53.186161][ T8488] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 53.192386][ T8488] kernfs_fop_read+0xe9/0x590 [ 53.197044][ T8488] ? rw_verify_area+0x11d/0x350 [ 53.201871][ T8488] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 53.207482][ T8488] vfs_read+0x1b5/0x570 [ 53.211617][ T8488] ksys_read+0x12d/0x250 [ 53.215835][ T8488] ? vfs_write+0xa80/0xa80 [ 53.220232][ T8488] ? syscall_enter_from_user_mode+0x1d/0x50 [ 53.226106][ T8488] do_syscall_64+0x2d/0x70 [ 53.230497][ T8488] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.236369][ T8488] RIP: 0033:0x4b117b [ 53.240237][ T8488] 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 [ 53.259819][ T8488] RSP: 002b:000000c0000b7738 EFLAGS: 00000216 ORIG_RAX: 0000000000000000 [ 53.268226][ T8488] RAX: ffffffffffffffda RBX: 000000c000020800 RCX: 00000000004b117b [ 53.276174][ T8488] RDX: 0000000000001200 RSI: 000000c00038f300 RDI: 0000000000000006 [ 53.284121][ T8488] RBP: 000000c0000b7788 R08: 0000000000000001 R09: 0000000000000002 [ 53.292080][ T8488] R10: 0000000000001200 R11: 0000000000000216 R12: ffffffffffffffff [ 53.300027][ T8488] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 [ 53.309807][ T8488] ================================================================================ [ 53.319138][ T8488] Kernel panic - not syncing: panic_on_warn set ... [ 53.325697][ T8488] CPU: 0 PID: 8488 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 53.333652][ T8488] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.343683][ T8488] Call Trace: [ 53.346940][ T8488] dump_stack+0x107/0x163 [ 53.351250][ T8488] panic+0x343/0x77f [ 53.355293][ T8488] ? __warn_printk+0xf3/0xf3 [ 53.359866][ T8488] ? ubsan_epilogue+0x3e/0x5a [ 53.364534][ T8488] ubsan_epilogue+0x54/0x5a [ 53.369013][ T8488] __ubsan_handle_load_invalid_value.cold+0x62/0x6c [ 53.375584][ T8488] param_get_bool.cold+0x14/0x19 [ 53.380501][ T8488] param_attr_show+0x14a/0x220 [ 53.385244][ T8488] ? kernel_param_unlock+0x40/0x40 [ 53.390334][ T8488] module_attr_show+0x48/0x70 [ 53.394989][ T8488] ? func_ptr_is_kernel_text+0x80/0x80 [ 53.400511][ T8488] sysfs_kf_seq_show+0x1f8/0x400 [ 53.405431][ T8488] seq_read_iter+0x4d3/0x1220 [ 53.410096][ T8488] seq_read+0x3dd/0x5b0 [ 53.414242][ T8488] ? seq_read_iter+0x1220/0x1220 [ 53.419160][ T8488] ? lock_downgrade+0x6d0/0x6d0 [ 53.423994][ T8488] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 53.430215][ T8488] kernfs_fop_read+0xe9/0x590 [ 53.434870][ T8488] ? rw_verify_area+0x11d/0x350 [ 53.439696][ T8488] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 53.445307][ T8488] vfs_read+0x1b5/0x570 [ 53.449442][ T8488] ksys_read+0x12d/0x250 [ 53.453660][ T8488] ? vfs_write+0xa80/0xa80 [ 53.458063][ T8488] ? syscall_enter_from_user_mode+0x1d/0x50 [ 53.463935][ T8488] do_syscall_64+0x2d/0x70 [ 53.468329][ T8488] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.474285][ T8488] RIP: 0033:0x4b117b [ 53.478240][ T8488] 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 [ 53.497827][ T8488] RSP: 002b:000000c0000b7738 EFLAGS: 00000216 ORIG_RAX: 0000000000000000 [ 53.506229][ T8488] RAX: ffffffffffffffda RBX: 000000c000020800 RCX: 00000000004b117b [ 53.514176][ T8488] RDX: 0000000000001200 RSI: 000000c00038f300 RDI: 0000000000000006 [ 53.522212][ T8488] RBP: 000000c0000b7788 R08: 0000000000000001 R09: 0000000000000002 [ 53.530168][ T8488] R10: 0000000000001200 R11: 0000000000000216 R12: ffffffffffffffff [ 53.538293][ T8488] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 [ 53.549867][ T8488] Kernel Offset: disabled [ 53.554327][ T8488] Rebooting in 86400 seconds..