general protection fault, probably for non-canonical address 0xdffffc0000000024: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000120-0x0000000000000127] CPU: 1 PID: 12982 Comm: syz.9.3541 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025 RIP: 0010:mutex_can_spin_on_owner kernel/locking/mutex.c:620 [inline] RIP: 0010:mutex_optimistic_spin kernel/locking/mutex.c:664 [inline] RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:976 [inline] RIP: 0010:__mutex_lock+0x18e/0xc50 kernel/locking/mutex.c:1117 Code: 42 80 3c 28 00 74 08 48 89 df e8 fd 5c 26 fd 4c 8b 3b 49 83 e7 f8 0f 84 93 00 00 00 4c 89 e9 4d 8d 6f 2c 4c 89 e8 48 c1 e8 03 <0f> b6 04 08 84 c0 0f 85 64 08 00 00 41 83 7d 00 00 0f 84 24 01 00 RSP: 0018:ffffc900016274e0 EFLAGS: 00010207 RAX: 0000000000000024 RBX: ffff888115e0ac40 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888115e0ac40 RBP: ffffc90001627600 R08: dffffc0000000000 R09: ffffed1022bc1589 R10: ffffed1022bc1589 R11: 1ffff11022bc1588 R12: ffff88810f4c3b40 R13: 0000000000000124 R14: 0000000000000007 R15: 00000000000000f8 FS: 00007fcd767946c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000122fee000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __mutex_lock_slowpath+0xe/0x10 kernel/locking/mutex.c:1379 mutex_lock+0xcf/0xe0 kernel/locking/mutex.c:299 steam_input_open+0x91/0x160 drivers/hid/hid-steam.c:297 input_open_device+0x14c/0x2a0 drivers/input/input.c:635 evdev_open_device drivers/input/evdev.c:400 [inline] evdev_open+0x4d2/0x5e0 drivers/input/evdev.c:487 chrdev_open+0x597/0x670 fs/char_dev.c:414 do_dentry_open+0x793/0x1090 fs/open.c:819 vfs_open+0x73/0x80 fs/open.c:942 do_open fs/namei.c:3391 [inline] path_openat+0x27ad/0x3160 fs/namei.c:3509 do_filp_open+0x1b3/0x3e0 fs/namei.c:3536 do_sys_openat2+0x14c/0x6d0 fs/open.c:1217 do_sys_open fs/open.c:1233 [inline] __do_sys_openat fs/open.c:1249 [inline] __se_sys_openat fs/open.c:1244 [inline] __x64_sys_openat+0x136/0x160 fs/open.c:1244 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fcd77d2a590 Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 49 94 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 9c 94 02 00 8b 44 RSP: 002b:00007fcd76793b70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000081f42 RCX: 00007fcd77d2a590 RDX: 0000000000081f42 RSI: 00007fcd76793c10 RDI: 00000000ffffff9c RBP: 00007fcd76793c10 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: cccccccccccccccd R13: 00007fcd77f73038 R14: 00007fcd77f72fa0 R15: 00007ffe2d37b868 Modules linked in: ---[ end trace 1aa75f59b532c7e6 ]--- RIP: 0010:mutex_can_spin_on_owner kernel/locking/mutex.c:620 [inline] RIP: 0010:mutex_optimistic_spin kernel/locking/mutex.c:664 [inline] RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:976 [inline] RIP: 0010:__mutex_lock+0x18e/0xc50 kernel/locking/mutex.c:1117 Code: 42 80 3c 28 00 74 08 48 89 df e8 fd 5c 26 fd 4c 8b 3b 49 83 e7 f8 0f 84 93 00 00 00 4c 89 e9 4d 8d 6f 2c 4c 89 e8 48 c1 e8 03 <0f> b6 04 08 84 c0 0f 85 64 08 00 00 41 83 7d 00 00 0f 84 24 01 00 RSP: 0018:ffffc900016274e0 EFLAGS: 00010207 RAX: 0000000000000024 RBX: ffff888115e0ac40 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888115e0ac40 RBP: ffffc90001627600 R08: dffffc0000000000 R09: ffffed1022bc1589 R10: ffffed1022bc1589 R11: 1ffff11022bc1588 R12: ffff88810f4c3b40 R13: 0000000000000124 R14: 0000000000000007 R15: 00000000000000f8 FS: 00007fcd767946c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000122fee000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 5: 74 08 je 0xf 7: 48 89 df mov %rbx,%rdi a: e8 fd 5c 26 fd call 0xfd265d0c f: 4c 8b 3b mov (%rbx),%r15 12: 49 83 e7 f8 and $0xfffffffffffffff8,%r15 16: 0f 84 93 00 00 00 je 0xaf 1c: 4c 89 e9 mov %r13,%rcx 1f: 4d 8d 6f 2c lea 0x2c(%r15),%r13 23: 4c 89 e8 mov %r13,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 64 08 00 00 jne 0x89a 36: 41 83 7d 00 00 cmpl $0x0,0x0(%r13) 3b: 0f .byte 0xf 3c: 84 24 01 test %ah,(%rcx,%rax,1)