random: crng reseeded on system resumption BUG: unable to handle page fault for address: fffffbcc04c4ee06 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 6dfd0067 P4D 6dfd0067 PUD 6de84067 PMD 6de83067 PTE 0 Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 PID: 4400 Comm: syz-executor.4 Not tainted 6.1.0-rc3-next-20221101 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:get_desc+0x128/0x470 Code: e2 02 00 00 83 e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 0f 85 cd 02 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 d8 48 c1 e8 03 <0f> b6 0c 10 48 8d 43 07 48 89 c6 48 c1 ee 03 0f b6 14 16 48 89 de RSP: 0000:ffff88803eeafbf8 EFLAGS: 00010216 RAX: 1fffffcc04c4ee06 RBX: fffffe6026277030 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000006 RBP: ffff88803eeafcb8 R08: 0000000000000006 R09: 000000000000007f R10: 0000000000000030 R11: 0000000000000001 R12: 1ffff11007dd5f7f R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000007f FS: 00007f74514e4700(0000) GS:ffff88806d000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbcc04c4ee06 CR3: 000000000e74c000 CR4: 0000000000350ef0 Call Trace: insn_get_code_seg_params+0xa7/0x1b0 insn_decode_from_regs+0x6e/0x1a0 fixup_umip_exception+0xc7/0x6e0 exc_general_protection+0x15d/0x220 asm_exc_alignment_check-0xe/0x30 RIP: 0033:0x7f7453f09497 Code: 03 75 14 c7 05 16 6a 0b 01 04 00 00 00 bf 06 00 00 00 e8 7c f4 01 00 83 3d 05 6a 0b 01 04 75 0b c7 05 f9 69 0b 01 05 00 00 00 83 3d f1 69 0b 01 05 75 14 c7 05 e5 69 0b 01 06 00 00 00 bf 7f RSP: 002b:00007f74514e3dc0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00007f74514e4700 RCX: 00007f7453f28a41 RDX: 0000000000000000 RSI: 00007f74514e3ca0 RDI: 0000000000000002 RBP: 00007f74514e4020 R08: 0000000000000000 R09: 00007f74514e3ca0 R10: 0000000000000008 R11: 0000000000000246 R12: 00007f74514e3f20 R13: 0000000000001000 R14: 0000000000000020 R15: 00007f7454065000 Modules linked in: CR2: fffffbcc04c4ee06 ---[ end trace 0000000000000000 ]--- RIP: 0010:get_desc+0x128/0x470 Code: e2 02 00 00 83 e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 0f 85 cd 02 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 d8 48 c1 e8 03 <0f> b6 0c 10 48 8d 43 07 48 89 c6 48 c1 ee 03 0f b6 14 16 48 89 de RSP: 0000:ffff88803eeafbf8 EFLAGS: 00010216 RAX: 1fffffcc04c4ee06 RBX: fffffe6026277030 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000006 RBP: ffff88803eeafcb8 R08: 0000000000000006 R09: 000000000000007f R10: 0000000000000030 R11: 0000000000000001 R12: 1ffff11007dd5f7f R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000007f FS: 00007f74514e4700(0000) GS:ffff88806d000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbcc04c4ee06 CR3: 000000000e74c000 CR4: 0000000000350ef0 netlink: 'syz-executor.1': attribute type 11 has an invalid length. random: crng reseeded on system resumption Restarting kernel threads ... done. netlink: 'syz-executor.1': attribute type 11 has an invalid length. random: crng reseeded on system resumption syz-executor.1 (4437) used greatest stack depth: 23704 bytes left random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption netlink: 'syz-executor.5': attribute type 11 has an invalid length. random: crng reseeded on system resumption Restarting kernel threads ... netlink: 'syz-executor.1': attribute type 11 has an invalid length. netlink: 'syz-executor.6': attribute type 11 has an invalid length. done. netlink: 'syz-executor.2': attribute type 11 has an invalid length. netlink: 'syz-executor.6': attribute type 11 has an invalid length. netlink: 'syz-executor.5': attribute type 11 has an invalid length. syz-executor.2 (4536) used greatest stack depth: 23640 bytes left netlink: 'syz-executor.2': attribute type 11 has an invalid length. netlink: 'syz-executor.6': attribute type 11 has an invalid length. netlink: 3760 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 3760 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 3760 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 3760 bytes leftover after parsing attributes in process `syz-executor.3'. loop2: detected capacity change from 0 to 40 loop2: detected capacity change from 0 to 40 loop2: detected capacity change from 0 to 40 loop7: detected capacity change from 0 to 40 loop7: detected capacity change from 0 to 40 loop2: detected capacity change from 0 to 40 ---------------- Code disassembly (best guess): 0: e2 02 loop 0x4 2: 00 00 add %al,(%rax) 4: 83 e0 07 and $0x7,%eax 7: 38 c2 cmp %al,%dl 9: 0f 9e c1 setle %cl c: 84 d2 test %dl,%dl e: 0f 95 c0 setne %al 11: 84 c1 test %al,%cl 13: 0f 85 cd 02 00 00 jne 0x2e6 19: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 20: fc ff df 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 0f b6 0c 10 movzbl (%rax,%rdx,1),%ecx <-- trapping instruction 2e: 48 8d 43 07 lea 0x7(%rbx),%rax 32: 48 89 c6 mov %rax,%rsi 35: 48 c1 ee 03 shr $0x3,%rsi 39: 0f b6 14 16 movzbl (%rsi,%rdx,1),%edx 3d: 48 89 de mov %rbx,%rsi