================================================================================ UBSAN: invalid-load in kernel/params.c:302:33 load of value 255 is not a valid value for type '_Bool' CPU: 0 PID: 9983 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148 __ubsan_handle_load_invalid_value.cold+0x62/0x6c lib/ubsan.c:427 param_get_bool.cold+0x14/0x19 kernel/params.c:302 param_attr_show+0x14a/0x220 kernel/params.c:549 module_attr_show+0x48/0x70 kernel/params.c:882 sysfs_kf_seq_show+0x1f8/0x400 fs/sysfs/file.c:61 seq_read_iter+0x4d3/0x1220 fs/seq_file.c:227 seq_read+0x3dd/0x5b0 fs/seq_file.c:159 kernfs_fop_read+0xe9/0x590 fs/kernfs/file.c:251 vfs_read+0x1b5/0x570 fs/read_write.c:494 ksys_read+0x12d/0x250 fs/read_write.c:634 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4ad4a0 Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 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 RSP: 002b:000000c0004c1678 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 000000c00001c000 RCX: 00000000004ad4a0 RDX: 0000000000001200 RSI: 000000c0004ed300 RDI: 0000000000000003 RBP: 000000c0004c16c8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005 ================================================================================