general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] CPU: 1 PID: 25879 Comm: syz-executor.2 Not tainted 6.4.0-syzkaller-11311-g24be4d0b46bb #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:idempotent kernel/module/main.c:3078 [inline] RIP: 0010:init_module_from_file+0x1c1/0x6a0 kernel/module/main.c:3124 Code: 0f 84 c0 01 00 00 e8 3e f1 12 00 4d 89 e7 49 83 ef 08 74 61 e8 30 f1 12 00 4c 89 fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 59 04 00 00 4d 3b 2f 0f 84 ae 00 00 00 e8 07 f1 RSP: 0018:ffffc900202afd28 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 000000000000001c RCX: 0000000000000000 RDX: 0000000000000007 RSI: ffffffff81710e70 RDI: ffffc9000efdfe28 RBP: ffff88802c2fe840 R08: 0000000000000001 R09: fffff52004055f97 R10: 0000000000000003 R11: 0000000000000001 R12: ffffc9000efdfe28 R13: ffff88802a3de7c0 R14: ffffffff9213f200 R15: 000000000000003e FS: 00007f9972fce700(0000) GS:ffff88806b700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 000000010f4c7000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_finit_module kernel/module/main.c:3171 [inline] __se_sys_finit_module kernel/module/main.c:3154 [inline] __x64_sys_finit_module+0xfd/0x190 kernel/module/main.c:3154 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f997228c389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9972fce168 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 00007f99723abf80 RCX: 00007f997228c389 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00007f99722d7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcf8057d2f R14: 00007f9972fce300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:idempotent kernel/module/main.c:3078 [inline] RIP: 0010:init_module_from_file+0x1c1/0x6a0 kernel/module/main.c:3124 Code: 0f 84 c0 01 00 00 e8 3e f1 12 00 4d 89 e7 49 83 ef 08 74 61 e8 30 f1 12 00 4c 89 fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 59 04 00 00 4d 3b 2f 0f 84 ae 00 00 00 e8 07 f1 RSP: 0018:ffffc900202afd28 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 000000000000001c RCX: 0000000000000000 RDX: 0000000000000007 RSI: ffffffff81710e70 RDI: ffffc9000efdfe28 RBP: ffff88802c2fe840 R08: 0000000000000001 R09: fffff52004055f97 R10: 0000000000000003 R11: 0000000000000001 R12: ffffc9000efdfe28 R13: ffff88802a3de7c0 R14: ffffffff9213f200 R15: 000000000000003e FS: 00007f9972fce700(0000) GS:ffff88806b700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 000000010f4c7000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 84 c0 01 00 00 je 0x1c6 6: e8 3e f1 12 00 callq 0x12f149 b: 4d 89 e7 mov %r12,%r15 e: 49 83 ef 08 sub $0x8,%r15 12: 74 61 je 0x75 14: e8 30 f1 12 00 callq 0x12f149 19: 4c 89 fa mov %r15,%rdx 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 59 04 00 00 jne 0x48d 34: 4d 3b 2f cmp (%r15),%r13 37: 0f 84 ae 00 00 00 je 0xeb 3d: e8 .byte 0xe8 3e: 07 (bad) 3f: f1 icebp