[ 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 '10.128.10.36' (ECDSA) to the list of known hosts. 2020/12/27 12:26:13 fuzzer started syzkaller login: [ 52.704146][ T8468] ================================================================================ [ 52.714562][ T8468] UBSAN: invalid-load in kernel/params.c:302:33 [ 52.721468][ T8468] load of value 255 is not a valid value for type '_Bool' [ 52.729193][ T8468] CPU: 1 PID: 8468 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 52.737407][ T8468] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.747459][ T8468] Call Trace: [ 52.750986][ T8468] dump_stack+0x107/0x163 [ 52.755590][ T8468] ubsan_epilogue+0xb/0x5a [ 52.760683][ T8468] __ubsan_handle_load_invalid_value.cold+0x62/0x6c [ 52.767274][ T8468] param_get_bool.cold+0x14/0x19 [ 52.772198][ T8468] param_attr_show+0x14a/0x220 [ 52.776948][ T8468] ? kernel_param_unlock+0x40/0x40 [ 52.782042][ T8468] module_attr_show+0x48/0x70 [ 52.786702][ T8468] ? func_ptr_is_kernel_text+0x80/0x80 [ 52.792145][ T8468] sysfs_kf_seq_show+0x1f8/0x400 [ 52.797068][ T8468] seq_read_iter+0x4d3/0x1220 [ 52.801750][ T8468] seq_read+0x3dd/0x5b0 [ 52.805889][ T8468] ? seq_read_iter+0x1220/0x1220 [ 52.810813][ T8468] ? lock_downgrade+0x6d0/0x6d0 [ 52.815665][ T8468] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 52.821907][ T8468] kernfs_fop_read+0xe9/0x590 [ 52.826571][ T8468] ? rw_verify_area+0x11d/0x350 [ 52.831401][ T8468] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 52.837018][ T8468] vfs_read+0x1b5/0x570 [ 52.841172][ T8468] ksys_read+0x12d/0x250 [ 52.845393][ T8468] ? vfs_write+0xa80/0xa80 [ 52.849790][ T8468] ? syscall_enter_from_user_mode+0x1d/0x50 [ 52.855670][ T8468] do_syscall_64+0x2d/0x70 [ 52.860069][ T8468] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 52.865997][ T8468] RIP: 0033:0x4b117b [ 52.869888][ T8468] 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 [ 52.889497][ T8468] RSP: 002b:000000c0000a9738 EFLAGS: 00000216 ORIG_RAX: 0000000000000000 [ 52.897889][ T8468] RAX: ffffffffffffffda RBX: 000000c00001e000 RCX: 00000000004b117b [ 52.905842][ T8468] RDX: 0000000000001200 RSI: 000000c00016b300 RDI: 0000000000000006 [ 52.913794][ T8468] RBP: 000000c0000a9788 R08: 0000000000000001 R09: 0000000000000002 [ 52.921745][ T8468] R10: 0000000000001200 R11: 0000000000000216 R12: ffffffffffffffff [ 52.929694][ T8468] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 [ 52.937803][ T8468] ================================================================================ [ 52.947134][ T8468] Kernel panic - not syncing: panic_on_warn set ... [ 52.953720][ T8468] CPU: 1 PID: 8468 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 52.961680][ T8468] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.971713][ T8468] Call Trace: [ 52.974971][ T8468] dump_stack+0x107/0x163 [ 52.979280][ T8468] panic+0x343/0x77f [ 52.983154][ T8468] ? __warn_printk+0xf3/0xf3 [ 52.987731][ T8468] ? ubsan_epilogue+0x3e/0x5a [ 52.992392][ T8468] ubsan_epilogue+0x54/0x5a [ 52.996890][ T8468] __ubsan_handle_load_invalid_value.cold+0x62/0x6c [ 53.003461][ T8468] param_get_bool.cold+0x14/0x19 [ 53.008378][ T8468] param_attr_show+0x14a/0x220 [ 53.013122][ T8468] ? kernel_param_unlock+0x40/0x40 [ 53.018224][ T8468] module_attr_show+0x48/0x70 [ 53.022895][ T8468] ? func_ptr_is_kernel_text+0x80/0x80 [ 53.028333][ T8468] sysfs_kf_seq_show+0x1f8/0x400 [ 53.033252][ T8468] seq_read_iter+0x4d3/0x1220 [ 53.037919][ T8468] seq_read+0x3dd/0x5b0 [ 53.042061][ T8468] ? seq_read_iter+0x1220/0x1220 [ 53.046983][ T8468] ? lock_downgrade+0x6d0/0x6d0 [ 53.051815][ T8468] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 53.058044][ T8468] kernfs_fop_read+0xe9/0x590 [ 53.062702][ T8468] ? rw_verify_area+0x11d/0x350 [ 53.067530][ T8468] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 53.073158][ T8468] vfs_read+0x1b5/0x570 [ 53.077294][ T8468] ksys_read+0x12d/0x250 [ 53.081515][ T8468] ? vfs_write+0xa80/0xa80 [ 53.085911][ T8468] ? syscall_enter_from_user_mode+0x1d/0x50 [ 53.091797][ T8468] do_syscall_64+0x2d/0x70 [ 53.096191][ T8468] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.102078][ T8468] RIP: 0033:0x4b117b [ 53.105956][ T8468] 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 [ 53.125539][ T8468] RSP: 002b:000000c0000a9738 EFLAGS: 00000216 ORIG_RAX: 0000000000000000 [ 53.133947][ T8468] RAX: ffffffffffffffda RBX: 000000c00001e000 RCX: 00000000004b117b [ 53.141898][ T8468] RDX: 0000000000001200 RSI: 000000c00016b300 RDI: 0000000000000006 [ 53.149887][ T8468] RBP: 000000c0000a9788 R08: 0000000000000001 R09: 0000000000000002 [ 53.158464][ T8468] R10: 0000000000001200 R11: 0000000000000216 R12: ffffffffffffffff [ 53.166417][ T8468] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 [ 53.178224][ T8468] Kernel Offset: disabled [ 53.182692][ T8468] Rebooting in 86400 seconds..