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) close(0xffffffffffffffff) mkdirat(0xffffffffffffff9c, &(0x7f0000000240)='./config/nvmet/subsystems/testsubsys/namespaces/1\x00', 0x1ff) r1 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./config/nvmet/subsystems/testsubsys/namespaces/1/buffered_io\x00', 0x1, 0x0) write(r1, &(0x7f0000000340)='1\n', 0x2) close(r1) openat(0xffffffffffffff9c, &(0x7f0000000380)='./config/nvmet/subsystems/testsubsys/namespaces/1/device_path\x00', 0x1, 0x0) r2 = openat(0xffffffffffffff9c, &(0x7f0000000440)='./config/nvmet/subsystems/testsubsys/namespaces/1/enable\x00', 0x1, 0x0) write(r2, &(0x7f00000004c0)='1', 0x1) [ 173.418395][ T5303] Bluetooth: hci0: command tx timeout [ 173.454905][ T5340] nvmet: adding nsid 1 to subsystem testsubsys [ 173.458864][ T5340] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI [ 173.466689][ T5340] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 173.472923][ T5340] CPU: 0 UID: 0 PID: 5340 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 173.481736][ T5340] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 173.486185][ T5340] RIP: 0010:strlen+0x29/0x70 [ 173.488263][ T5340] 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 [ 173.496423][ T5340] RSP: 0018:ffffc9000e427978 EFLAGS: 00010246 [ 173.498904][ T5340] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000 [ 173.502059][ T5340] RDX: ffffc9000f329000 RSI: 0000000000000053 RDI: 0000000000000000 [ 173.505109][ T5340] RBP: ffffc9000e427ab8 R08: ffffffff907a377f R09: 1ffffffff20f46ef [ 173.508217][ T5340] R10: dffffc0000000000 R11: fffffbfff20f46f0 R12: 1ffff92001c84f40 [ 173.511334][ T5340] R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffffffffffffff [ 173.514899][ T5340] FS: 00007fd2e6e406c0(0000) GS:ffff88808c2cf000(0000) knlGS:0000000000000000 [ 173.518632][ T5340] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 173.521352][ T5340] CR2: 00007fd2e621e6d0 CR3: 00000000438ae000 CR4: 0000000000352ef0 [ 173.524755][ T5340] Call Trace: [ 173.526054][ T5340] [ 173.527199][ T5340] do_getname_kernel+0x1d/0x230 [ 173.529086][ T5340] ? getname_kernel+0xd/0x20 [ 173.531075][ T5340] filp_open+0x87/0x1d0 [ 173.532715][ T5340] ? __pfx_filp_open+0x10/0x10 [ 173.534845][ T5340] ? __pfx___mutex_lock+0x10/0x10 [ 173.537055][ T5340] nvmet_file_ns_enable+0x74/0x350 [ 173.539404][ T5340] nvmet_ns_enable+0xaa/0x780 [ 173.542037][ T5340] ? lock_acquire+0x115/0x350 [ 173.544597][ T5340] nvmet_ns_enable_store+0xd7/0x170 [ 173.547308][ T5340] ? __pfx_nvmet_ns_enable_store+0x10/0x10 [ 173.549967][ T5340] ? down_read+0x2be/0x330 [ 173.551884][ T5340] ? __pfx_nvmet_ns_enable_store+0x10/0x10 [ 173.554367][ T5340] configfs_write_iter+0x337/0x430 [ 173.556497][ T5340] vfs_write+0x612/0xba0 [ 173.558310][ T5340] ? __pfx_vfs_write+0x10/0x10 [ 173.560309][ T5340] ? __fget_files+0x2a/0x420 [ 173.562165][ T5340] ksys_write+0x150/0x270 [ 173.563973][ T5340] ? __pfx_ksys_write+0x10/0x10 [ 173.566019][ T5340] do_syscall_64+0x166/0x520 [ 173.568214][ T5340] ? trace_irq_disable+0x3b/0x140 [ 173.570724][ T5340] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 173.573328][ T5340] ? clear_bhb_loop+0x70/0xc0 [ 173.575346][ T5340] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 173.577897][ T5340] RIP: 0033:0x7fd2e5f9e159 [ 173.579885][ T5340] 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 [ 173.588163][ T5340] RSP: 002b:00007fd2e6e3ffe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 173.591762][ T5340] RAX: ffffffffffffffda RBX: 00007fd2e6225fa0 RCX: 00007fd2e5f9e159 [ 173.594709][ T5340] RDX: 0000000000000001 RSI: 00002000000004c0 RDI: 0000000000000005 [ 173.597850][ T5340] RBP: 00007fd2e6035024 R08: 0000000000000000 R09: 0000000000000000 [ 173.601204][ T5340] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 173.604747][ T5340] R13: 00007fd2e6226038 R14: 00007fd2e6225fa0 R15: 00007ffd55ed9ff8 [ 173.608095][ T5340] [ 173.609484][ T5340] Modules linked in: [ 173.611914][ T5340] ---[ end trace 0000000000000000 ]--- [ 173.620840][ T5340] RIP: 0010:strlen+0x29/0x70 [ 173.623214][ T5340] 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 [ 173.631887][ T5340] RSP: 0018:ffffc9000e427978 EFLAGS: 00010246 [ 173.634856][ T5340] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000 [ 173.642583][ T5340] RDX: ffffc9000f329000 RSI: 0000000000000053 RDI: 0000000000000000 [ 173.646268][ T5340] RBP: ffffc9000e427ab8 R08: ffffffff907a377f R09: 1ffffffff20f46ef [ 173.650073][ T5340] R10: dffffc0000000000 R11: fffffbfff20f46f0 R12: 1ffff92001c84f40 [ 173.654167][ T5340] R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffffffffffffff [ 173.657977][ T5340] FS: 00007fd2e6e406c0(0000) GS:ffff88808c2cf000(0000) knlGS:0000000000000000 [ 173.662166][ T5340] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 173.665320][ T5340] CR2: 00007fd2e621e6d0 CR3: 00000000438ae000 CR4: 0000000000352ef0 [ 173.669476][ T5340] Kernel panic - not syncing: Fatal exception [ 173.672511][ T5340] Kernel Offset: disabled [ 173.674346][ T5340] Rebooting in 86400 seconds..