loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): Test dummy encryption mode enabled EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. fscrypt: AES-256-CBC-CTS using implementation "cts-cbc-aes-aesni" ------------[ cut here ]------------ RTNL: assertion failed at ./include/net/netdev_lock.h (72) WARNING: ./include/net/netdev_lock.h:72 at netdev_assert_locked_ops_compat include/net/netdev_lock.h:72 [inline], CPU#0: syz.0.0/5312 WARNING: ./include/net/netdev_lock.h:72 at netdev_queue_get_dma_dev+0x483/0x500 net/core/netdev_queues.c:43, CPU#0: syz.0.0/5312 Modules linked in: CPU: 0 UID: 0 PID: 5312 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:netdev_assert_locked_ops_compat include/net/netdev_lock.h:72 [inline] RIP: 0010:netdev_queue_get_dma_dev+0x48f/0x500 net/core/netdev_queues.c:43 Code: 75 d7 eb dd e8 52 5e 0f f8 90 0f 0b 90 e9 e0 fc ff ff e8 44 5e 0f f8 48 8d 3d 1d 5a af 06 48 c7 c6 ad c6 28 8e ba 48 00 00 00 <67> 48 0f b9 3a e9 be fc ff ff 44 89 f9 80 e1 07 38 c1 0f 8c 9b fb RSP: 0018:ffffc9000e17f9e0 EFLAGS: 00010287 RAX: ffffffff89b7b49c RBX: ffff888012c94000 RCX: 0000000000100000 RDX: 0000000000000048 RSI: ffffffff8e28c6ad RDI: ffffffff90670ec0 RBP: 0000000000000000 R08: ffffffff9002a0e7 R09: 1ffffffff200541c R10: dffffc0000000000 R11: fffffbfff200541d R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fde144546c0(0000) GS:ffff88808c54a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000002020 CR3: 000000004238f000 CR4: 0000000000352ef0 Call Trace: zcrx_register_netdev+0x213/0x520 io_uring/zcrx.c:831 io_register_zcrx+0x953/0xc00 io_uring/zcrx.c:983 __io_uring_register io_uring/register.c:942 [inline] __do_sys_io_uring_register io_uring/register.c:1040 [inline] __se_sys_io_uring_register+0xc23/0x1ab0 io_uring/register.c:1017 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fde1359e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fde14453fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 00007fde13825fa0 RCX: 00007fde1359e0d9 RDX: 0000200000000100 RSI: 0000000000000020 RDI: 0000000000000005 RBP: 00007fde13635024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fde13826038 R14: 00007fde13825fa0 R15: 00007ffc2b46ff48 ---------------- Code disassembly (best guess): 0: 75 d7 jne 0xffffffd9 2: eb dd jmp 0xffffffe1 4: e8 52 5e 0f f8 call 0xf80f5e5b 9: 90 nop a: 0f 0b ud2 c: 90 nop d: e9 e0 fc ff ff jmp 0xfffffcf2 12: e8 44 5e 0f f8 call 0xf80f5e5b 17: 48 8d 3d 1d 5a af 06 lea 0x6af5a1d(%rip),%rdi # 0x6af5a3b 1e: 48 c7 c6 ad c6 28 8e mov $0xffffffff8e28c6ad,%rsi 25: ba 48 00 00 00 mov $0x48,%edx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: e9 be fc ff ff jmp 0xfffffcf2 34: 44 89 f9 mov %r15d,%ecx 37: 80 e1 07 and $0x7,%cl 3a: 38 c1 cmp %al,%cl 3c: 0f .byte 0xf 3d: 8c .byte 0x8c 3e: 9b fwait 3f: fb sti