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) [ 94.657687][ T5316] nvmet: adding nsid 1 to subsystem testsubsys [ 94.666468][ T5316] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI [ 94.672115][ T5316] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 94.675593][ T5316] CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 94.679477][ T5316] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 94.684121][ T5316] RIP: 0010:strlen+0x29/0x70 [ 94.686308][ T5316] 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 [ 94.694726][ T5316] RSP: 0018:ffffc9000e0b7978 EFLAGS: 00010246 [ 94.697447][ T5316] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000 [ 94.700871][ T5316] RDX: ffffc9000ea5a000 RSI: 0000000000000053 RDI: 0000000000000000 [ 94.704134][ T5316] RBP: ffffc9000e0b7ab8 R08: ffffffff907a377f R09: 1ffffffff20f46ef [ 94.707403][ T5316] R10: dffffc0000000000 R11: fffffbfff20f46f0 R12: 1ffff92001c16f40 [ 94.710685][ T5316] R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffffffffffffff [ 94.713988][ T5316] FS: 00007fcc629f56c0(0000) GS:ffff88808c2cf000(0000) knlGS:0000000000000000 [ 94.717948][ T5316] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.720769][ T5316] CR2: 00007fcc6681e6d0 CR3: 0000000043456000 CR4: 0000000000352ef0 [ 94.724271][ T5316] Call Trace: [ 94.725793][ T5316] [ 94.727164][ T5316] do_getname_kernel+0x1d/0x230 [ 94.729236][ T5316] ? getname_kernel+0xd/0x20 [ 94.731270][ T5316] filp_open+0x87/0x1d0 [ 94.733058][ T5316] ? __pfx_filp_open+0x10/0x10 [ 94.735259][ T5316] ? __pfx___mutex_lock+0x10/0x10 [ 94.737677][ T5316] nvmet_file_ns_enable+0x74/0x350 [ 94.740032][ T5316] nvmet_ns_enable+0xaa/0x780 [ 94.742561][ T5316] ? lock_acquire+0x115/0x350 [ 94.744853][ T5316] nvmet_ns_enable_store+0xd7/0x170 [ 94.747166][ T5316] ? __pfx_nvmet_ns_enable_store+0x10/0x10 [ 94.749680][ T5316] ? down_read+0x2be/0x330 [ 94.751571][ T5316] ? __pfx_nvmet_ns_enable_store+0x10/0x10 [ 94.754026][ T5316] configfs_write_iter+0x337/0x430 [ 94.756248][ T5316] vfs_write+0x612/0xba0 [ 94.758085][ T5316] ? __pfx_vfs_write+0x10/0x10 [ 94.760126][ T5316] ? __fget_files+0x2a/0x420 [ 94.762229][ T5316] ksys_write+0x150/0x270 [ 94.764188][ T5316] ? __pfx_ksys_write+0x10/0x10 [ 94.766380][ T5316] do_syscall_64+0x166/0x520 [ 94.768481][ T5316] ? trace_irq_disable+0x3b/0x140 [ 94.770627][ T5316] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.773200][ T5316] ? clear_bhb_loop+0x70/0xc0 [ 94.775285][ T5316] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.777912][ T5316] RIP: 0033:0x7fcc6659e159 [ 94.779967][ T5316] 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 [ 94.788399][ T5316] RSP: 002b:00007fcc629f4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 94.792203][ T5316] RAX: ffffffffffffffda RBX: 00007fcc66825fa0 RCX: 00007fcc6659e159 [ 94.795703][ T5316] RDX: 0000000000000001 RSI: 00002000000004c0 RDI: 0000000000000005 [ 94.799302][ T5316] RBP: 00007fcc66635024 R08: 0000000000000000 R09: 0000000000000000 [ 94.802795][ T5316] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 94.806223][ T5316] R13: 00007fcc66826038 R14: 00007fcc66825fa0 R15: 00007ffcfc5adde8 [ 94.809687][ T5316] [ 94.811066][ T5316] Modules linked in: [ 94.813357][ T5316] ---[ end trace 0000000000000000 ]--- [ 94.820665][ T4644] Bluetooth: hci0: command tx timeout [ 94.823554][ T5316] RIP: 0010:strlen+0x29/0x70 [ 94.826494][ T5316] 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 [ 94.835137][ T5316] RSP: 0018:ffffc9000e0b7978 EFLAGS: 00010246 [ 94.838210][ T5316] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000 [ 94.842315][ T5316] RDX: ffffc9000ea5a000 RSI: 0000000000000053 RDI: 0000000000000000 [ 94.846465][ T5316] RBP: ffffc9000e0b7ab8 R08: ffffffff907a377f R09: 1ffffffff20f46ef [ 94.849875][ T5316] R10: dffffc0000000000 R11: fffffbfff20f46f0 R12: 1ffff92001c16f40 [ 94.853587][ T5316] R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffffffffffffff [ 94.857228][ T5316] FS: 00007fcc629f56c0(0000) GS:ffff88808c2cf000(0000) knlGS:0000000000000000 [ 94.861097][ T5316] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.864574][ T5316] CR2: 00007fcc667f36b8 CR3: 0000000043456000 CR4: 0000000000352ef0 [ 94.868367][ T5316] Kernel panic - not syncing: Fatal exception [ 94.871490][ T5316] Kernel Offset: disabled [ 94.873329][ T5316] Rebooting in 86400 seconds..