[ 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 '10.128.0.38' (ECDSA) to the list of known hosts. 2020/12/27 12:30:37 fuzzer started syzkaller login: [ 52.989993][ T8461] ================================================================================ [ 52.999494][ T8461] UBSAN: invalid-load in kernel/params.c:302:33 [ 53.005833][ T8461] load of value 255 is not a valid value for type '_Bool' [ 53.013782][ T8461] CPU: 0 PID: 8461 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 53.021826][ T8461] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.031931][ T8461] Call Trace: [ 53.035194][ T8461] dump_stack+0x107/0x163 [ 53.039528][ T8461] ubsan_epilogue+0xb/0x5a [ 53.043926][ T8461] __ubsan_handle_load_invalid_value.cold+0x62/0x6c [ 53.050515][ T8461] param_get_bool.cold+0x14/0x19 [ 53.055452][ T8461] param_attr_show+0x14a/0x220 [ 53.062031][ T8461] ? kernel_param_unlock+0x40/0x40 [ 53.067143][ T8461] module_attr_show+0x48/0x70 [ 53.071976][ T8461] ? func_ptr_is_kernel_text+0x80/0x80 [ 53.077415][ T8461] sysfs_kf_seq_show+0x1f8/0x400 [ 53.082339][ T8461] seq_read_iter+0x4d3/0x1220 [ 53.087012][ T8461] seq_read+0x3dd/0x5b0 [ 53.091153][ T8461] ? seq_read_iter+0x1220/0x1220 [ 53.096085][ T8461] ? lock_downgrade+0x6d0/0x6d0 [ 53.101355][ T8461] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 53.108193][ T8461] kernfs_fop_read+0xe9/0x590 [ 53.112862][ T8461] ? rw_verify_area+0x11d/0x350 [ 53.117712][ T8461] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 53.123329][ T8461] vfs_read+0x1b5/0x570 [ 53.127467][ T8461] ksys_read+0x12d/0x250 [ 53.131691][ T8461] ? vfs_write+0xa80/0xa80 [ 53.136089][ T8461] ? syscall_enter_from_user_mode+0x1d/0x50 [ 53.141967][ T8461] do_syscall_64+0x2d/0x70 [ 53.146363][ T8461] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.152238][ T8461] RIP: 0033:0x4b117b [ 53.156113][ T8461] 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 [ 53.176267][ T8461] RSP: 002b:000000c0000f1738 EFLAGS: 00000216 ORIG_RAX: 0000000000000000 [ 53.184665][ T8461] RAX: ffffffffffffffda RBX: 000000c00001e000 RCX: 00000000004b117b [ 53.192620][ T8461] RDX: 0000000000001200 RSI: 000000c00034b300 RDI: 0000000000000006 [ 53.200831][ T8461] RBP: 000000c0000f1788 R08: 0000000000000001 R09: 0000000000000002 [ 53.208807][ T8461] R10: 0000000000001200 R11: 0000000000000216 R12: ffffffffffffffff [ 53.216757][ T8461] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 [ 53.226250][ T8461] ================================================================================ [ 53.235572][ T8461] Kernel panic - not syncing: panic_on_warn set ... [ 53.242139][ T8461] CPU: 0 PID: 8461 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 [ 53.250093][ T8461] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.260137][ T8461] Call Trace: [ 53.263506][ T8461] dump_stack+0x107/0x163 [ 53.267824][ T8461] panic+0x343/0x77f [ 53.271699][ T8461] ? __warn_printk+0xf3/0xf3 [ 53.276332][ T8461] ? ubsan_epilogue+0x3e/0x5a [ 53.281002][ T8461] ubsan_epilogue+0x54/0x5a [ 53.285486][ T8461] __ubsan_handle_load_invalid_value.cold+0x62/0x6c [ 53.292059][ T8461] param_get_bool.cold+0x14/0x19 [ 53.296981][ T8461] param_attr_show+0x14a/0x220 [ 53.301748][ T8461] ? kernel_param_unlock+0x40/0x40 [ 53.306851][ T8461] module_attr_show+0x48/0x70 [ 53.311519][ T8461] ? func_ptr_is_kernel_text+0x80/0x80 [ 53.316963][ T8461] sysfs_kf_seq_show+0x1f8/0x400 [ 53.321902][ T8461] seq_read_iter+0x4d3/0x1220 [ 53.326569][ T8461] seq_read+0x3dd/0x5b0 [ 53.330722][ T8461] ? seq_read_iter+0x1220/0x1220 [ 53.335660][ T8461] ? lock_downgrade+0x6d0/0x6d0 [ 53.340495][ T8461] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 53.346722][ T8461] kernfs_fop_read+0xe9/0x590 [ 53.351404][ T8461] ? rw_verify_area+0x11d/0x350 [ 53.356234][ T8461] ? kernfs_vma_page_mkwrite+0x230/0x230 [ 53.361936][ T8461] vfs_read+0x1b5/0x570 [ 53.366101][ T8461] ksys_read+0x12d/0x250 [ 53.370326][ T8461] ? vfs_write+0xa80/0xa80 [ 53.374725][ T8461] ? syscall_enter_from_user_mode+0x1d/0x50 [ 53.380603][ T8461] do_syscall_64+0x2d/0x70 [ 53.385000][ T8461] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.390874][ T8461] RIP: 0033:0x4b117b [ 53.394746][ T8461] 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 [ 53.414417][ T8461] RSP: 002b:000000c0000f1738 EFLAGS: 00000216 ORIG_RAX: 0000000000000000 [ 53.423083][ T8461] RAX: ffffffffffffffda RBX: 000000c00001e000 RCX: 00000000004b117b [ 53.431378][ T8461] RDX: 0000000000001200 RSI: 000000c00034b300 RDI: 0000000000000006 [ 53.439430][ T8461] RBP: 000000c0000f1788 R08: 0000000000000001 R09: 0000000000000002 [ 53.447393][ T8461] R10: 0000000000001200 R11: 0000000000000216 R12: ffffffffffffffff [ 53.455532][ T8461] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 [ 53.467260][ T8461] Kernel Offset: disabled [ 53.471743][ T8461] Rebooting in 86400 seconds..