program: r0 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./file0\x00', 0x42, 0x1b6) ftruncate(r0, 0x100000) mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./config\x00', 0x1ff) mount(0x0, &(0x7f0000000080)='./config\x00', &(0x7f00000000c0)='configfs\x00', 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./config/nvmet/subsystems/testsubsys\x00', 0x1ff) r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./config/nvmet/subsystems/testsubsys/attr_allow_any_host\x00', 0x1, 0x0) write(r1, &(0x7f0000000200)='1', 0x1) close(r1) mkdirat(0xffffffffffffff9c, &(0x7f0000000240)='./config/nvmet/subsystems/testsubsys/namespaces/1\x00', 0x1ff) r2 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/nvmet/subsystems/testsubsys/namespaces/1/buffered_io\x00', 0x1, 0x0) write(r2, &(0x7f0000000340)='1\n', 0x2) close(r2) openat(0xffffffffffffff9c, &(0x7f0000000380)='./config/nvmet/subsystems/testsubsys/namespaces/1/device_path\x00', 0x1, 0x0) r3 = openat(0xffffffffffffff9c, &(0x7f0000000440)='./config/nvmet/subsystems/testsubsys/namespaces/1/enable\x00', 0x1, 0x0) write(r3, &(0x7f00000004c0)='1\n', 0x2) [ 160.506616][ T5289] Bluetooth: hci0: command tx timeout [ 160.539858][ T5328] nvmet: adding nsid 1 to subsystem testsubsys [ 160.544891][ T5328] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI [ 160.549831][ T5328] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 160.553765][ T5328] CPU: 0 UID: 0 PID: 5328 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 160.557719][ T5328] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 160.561877][ T5328] RIP: 0010:strlen+0x29/0x70 [ 160.563522][ T5328] Code: 90 f3 0f 1e fa 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 [ 160.570425][ T5328] RSP: 0018:ffffc9000e18f978 EFLAGS: 00010246 [ 160.572462][ T5328] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000 [ 160.575082][ T5328] RDX: ffffc9000ea82000 RSI: 0000000000000055 RDI: 0000000000000000 [ 160.578178][ T5328] RBP: ffffc9000e18fab8 R08: ffffffff907a377f R09: 1ffffffff20f46ef [ 160.581573][ T5328] R10: dffffc0000000000 R11: fffffbfff20f46f0 R12: 1ffff92001c31f40 [ 160.584912][ T5328] R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffffffffffffff [ 160.587965][ T5328] FS: 00007f6210a2f6c0(0000) GS:ffff88808c2cf000(0000) knlGS:0000000000000000 [ 160.591703][ T5328] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 160.594499][ T5328] CR2: 00007f620fe19fd0 CR3: 0000000012738000 CR4: 0000000000352ef0 [ 160.597867][ T5328] Call Trace: [ 160.599369][ T5328] [ 160.600658][ T5328] do_getname_kernel+0x1d/0x230 [ 160.602763][ T5328] ? getname_kernel+0xd/0x20 [ 160.604742][ T5328] filp_open+0x87/0x1d0 [ 160.606478][ T5328] ? __pfx_filp_open+0x10/0x10 [ 160.608423][ T5328] ? __pfx___mutex_lock+0x10/0x10 [ 160.610560][ T5328] nvmet_file_ns_enable+0x74/0x350 [ 160.612699][ T5328] nvmet_ns_enable+0xaa/0x780 [ 160.614445][ T5328] ? lock_acquire+0x115/0x350 [ 160.616150][ T5328] nvmet_ns_enable_store+0xd7/0x170 [ 160.618293][ T5328] ? __pfx_nvmet_ns_enable_store+0x10/0x10 [ 160.620905][ T5328] ? down_read+0x2be/0x330 [ 160.623002][ T5328] ? __pfx_nvmet_ns_enable_store+0x10/0x10 [ 160.625583][ T5328] configfs_write_iter+0x337/0x430 [ 160.627754][ T5328] vfs_write+0x612/0xba0 [ 160.629611][ T5328] ? __pfx_vfs_write+0x10/0x10 [ 160.631631][ T5328] ? __fget_files+0x2a/0x420 [ 160.633668][ T5328] ksys_write+0x150/0x270 [ 160.635603][ T5328] ? __pfx_ksys_write+0x10/0x10 [ 160.637758][ T5328] do_syscall_64+0x166/0x520 [ 160.639856][ T5328] ? trace_irq_disable+0x3b/0x140 [ 160.642033][ T5328] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 160.644478][ T5328] ? clear_bhb_loop+0x70/0xc0 [ 160.646444][ T5328] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 160.649075][ T5328] RIP: 0033:0x7f620fb9e159 [ 160.650935][ T5328] 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 [ 160.657865][ T5328] RSP: 002b:00007f6210a2efe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 160.661025][ T5328] RAX: ffffffffffffffda RBX: 00007f620fe25fa0 RCX: 00007f620fb9e159 [ 160.664191][ T5328] RDX: 0000000000000002 RSI: 00002000000004c0 RDI: 0000000000000005 [ 160.667251][ T5328] RBP: 00007f620fc35024 R08: 0000000000000000 R09: 0000000000000000 [ 160.670602][ T5328] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 160.674008][ T5328] R13: 00007f620fe26038 R14: 00007f620fe25fa0 R15: 00007fff6e8f93f8 [ 160.677558][ T5328] [ 160.678993][ T5328] Modules linked in: [ 160.682022][ T5328] ---[ end trace 0000000000000000 ]--- [ 160.689538][ T5328] RIP: 0010:strlen+0x29/0x70 [ 160.691956][ T5328] Code: 90 f3 0f 1e fa 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 [ 160.700634][ T5328] RSP: 0018:ffffc9000e18f978 EFLAGS: 00010246 [ 160.703621][ T5328] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000 [ 160.707594][ T5328] RDX: ffffc9000ea82000 RSI: 0000000000000055 RDI: 0000000000000000 [ 160.711239][ T5328] RBP: ffffc9000e18fab8 R08: ffffffff907a377f R09: 1ffffffff20f46ef [ 160.714942][ T5328] R10: dffffc0000000000 R11: fffffbfff20f46f0 R12: 1ffff92001c31f40 [ 160.718645][ T5328] R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffffffffffffff [ 160.722583][ T5328] FS: 00007f6210a2f6c0(0000) GS:ffff88808c2cf000(0000) knlGS:0000000000000000 [ 160.727583][ T5328] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 160.730751][ T5328] CR2: 00007f620fdf36b8 CR3: 0000000012738000 CR4: 0000000000352ef0 [ 160.734703][ T5328] Kernel panic - not syncing: Fatal exception [ 160.737759][ T5328] Kernel Offset: disabled [ 160.739726][ T5328] Rebooting in 86400 seconds..