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) [ 94.350743][ T4649] Bluetooth: hci0: command tx timeout [ 94.395945][ T5320] nvmet: adding nsid 1 to subsystem testsubsys [ 94.399194][ T5320] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI [ 94.406651][ T5320] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 94.410159][ T5320] CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 94.413874][ T5320] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 94.418128][ T5320] RIP: 0010:strlen+0x29/0x70 [ 94.420247][ T5320] 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 [ 94.428401][ T5320] RSP: 0018:ffffc9000e507978 EFLAGS: 00010246 [ 94.431024][ T5320] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000 [ 94.434786][ T5320] RDX: ffffc9000ee1a000 RSI: 0000000000000053 RDI: 0000000000000000 [ 94.438059][ T5320] RBP: ffffc9000e507ab8 R08: ffffffff907a377f R09: 1ffffffff20f46ef [ 94.441396][ T5320] R10: dffffc0000000000 R11: fffffbfff20f46f0 R12: 1ffff92001ca0f40 [ 94.445105][ T5320] R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffffffffffffff [ 94.449018][ T5320] FS: 00007fd47f8896c0(0000) GS:ffff88808c2cf000(0000) knlGS:0000000000000000 [ 94.453477][ T5320] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.456054][ T5320] CR2: 00007f0e65bc4fb3 CR3: 0000000012504000 CR4: 0000000000352ef0 [ 94.459339][ T5320] Call Trace: [ 94.460758][ T5320] [ 94.462096][ T5320] do_getname_kernel+0x1d/0x230 [ 94.464266][ T5320] ? getname_kernel+0xd/0x20 [ 94.466311][ T5320] filp_open+0x87/0x1d0 [ 94.468102][ T5320] ? __pfx_filp_open+0x10/0x10 [ 94.470073][ T5320] ? __pfx___mutex_lock+0x10/0x10 [ 94.472152][ T5320] nvmet_file_ns_enable+0x74/0x350 [ 94.474436][ T5320] nvmet_ns_enable+0xaa/0x780 [ 94.476419][ T5320] ? lock_acquire+0x115/0x350 [ 94.478439][ T5320] nvmet_ns_enable_store+0xd7/0x170 [ 94.480577][ T5320] ? __pfx_nvmet_ns_enable_store+0x10/0x10 [ 94.483085][ T5320] ? down_read+0x2be/0x330 [ 94.484993][ T5320] ? __pfx_nvmet_ns_enable_store+0x10/0x10 [ 94.487578][ T5320] configfs_write_iter+0x337/0x430 [ 94.490793][ T5320] vfs_write+0x612/0xba0 [ 94.492642][ T5320] ? __pfx_vfs_write+0x10/0x10 [ 94.494728][ T5320] ? __fget_files+0x2a/0x420 [ 94.496580][ T5320] ksys_write+0x150/0x270 [ 94.498403][ T5320] ? __pfx_ksys_write+0x10/0x10 [ 94.500449][ T5320] do_syscall_64+0x166/0x520 [ 94.502389][ T5320] ? trace_irq_disable+0x3b/0x140 [ 94.504662][ T5320] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.507324][ T5320] ? clear_bhb_loop+0x70/0xc0 [ 94.509299][ T5320] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.511732][ T5320] RIP: 0033:0x7fd47e99e159 [ 94.513719][ T5320] 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 [ 94.522150][ T5320] RSP: 002b:00007fd47f888fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 94.525644][ T5320] RAX: ffffffffffffffda RBX: 00007fd47ec25fa0 RCX: 00007fd47e99e159 [ 94.529037][ T5320] RDX: 0000000000000001 RSI: 00002000000004c0 RDI: 0000000000000005 [ 94.532367][ T5320] RBP: 00007fd47ea35024 R08: 0000000000000000 R09: 0000000000000000 [ 94.535917][ T5320] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 94.539349][ T5320] R13: 00007fd47ec26038 R14: 00007fd47ec25fa0 R15: 00007ffec84f6908 [ 94.542714][ T5320] [ 94.543997][ T5320] Modules linked in: [ 94.549029][ T5320] ---[ end trace 0000000000000000 ]--- [ 94.573396][ T5320] RIP: 0010:strlen+0x29/0x70 [ 94.573458][ T5320] 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 [ 94.573544][ T5320] RSP: 0018:ffffc9000e507978 EFLAGS: 00010246 [ 94.573593][ T5320] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000 [ 94.573620][ T5320] RDX: ffffc9000ee1a000 RSI: 0000000000000053 RDI: 0000000000000000 [ 94.573647][ T5320] RBP: ffffc9000e507ab8 R08: ffffffff907a377f R09: 1ffffffff20f46ef [ 94.573675][ T5320] R10: dffffc0000000000 R11: fffffbfff20f46f0 R12: 1ffff92001ca0f40 [ 94.573855][ T5320] R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffffffffffffff [ 94.573885][ T5320] FS: 00007fd47f8896c0(0000) GS:ffff88808c2cf000(0000) knlGS:0000000000000000 [ 94.573915][ T5320] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.573944][ T5320] CR2: 00007f0e65bc4fb3 CR3: 0000000012504000 CR4: 0000000000352ef0 [ 94.574002][ T5320] Kernel panic - not syncing: Fatal exception [ 94.614071][ T5320] Kernel Offset: disabled [ 94.615908][ T5320] Rebooting in 86400 seconds..