netlink: 'syz-executor.5': attribute type 10 has an invalid length.
BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
#PF error: [normal kernel read fault]
PGD 8700f067 P4D 8700f067 PUD a4245067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 12202 Comm: syz-executor.0 Not tainted 5.0.0-rc6+ #85
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:slab_equal_or_root mm/slab.h:228 [inline]
RIP: 0010:cache_from_obj mm/slab.h:374 [inline]
RIP: 0010:cache_from_obj mm/slab.h:356 [inline]
RIP: 0010:kmem_cache_free+0x207/0x260 mm/slab.c:3741
Code: ea ff ff 48 c1 e8 0c 48 c1 e0 06 48 01 d0 48 8b 50 08 48 8d 4a ff 83 e2 01 48 0f 45 c1 48 8b 40 18 49 39 c4 0f 84 19 fe ff ff <4c> 3b a0 80 00 00 00 0f 85 60 1e 00 00 49 89 c4 e9 04 fe ff ff 0f
RSP: 0018:ffff888059ef7dd8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff88805ea7d800 RCX: ffffffffffffffff
RDX: 0000000000000000 RSI: ffffffff81329bb4 RDI: 0000000000000007
RBP: ffff888059ef7df8 R08: ffff88809e9de400 R09: 0000000000000001
kobject: 'loop5' (000000003070c326): kobject_uevent_env
R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff88821bc45380
kobject: 'loop5' (000000003070c326): fill_kobj_path: path = '/devices/virtual/block/loop5'
R13: ffff88805ea7d820 R14: ffff88821bc45380 R15: 00000000ffffff9c
FS:  0000000000c5c940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000080 CR3: 00000000908f0000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 putname+0xef/0x130 fs/namei.c:261
kobject: 'loop3' (00000000d489f8d8): kobject_uevent_env
 do_symlinkat+0x181/0x290 fs/namei.c:4160
kobject: 'loop3' (00000000d489f8d8): fill_kobj_path: path = '/devices/virtual/block/loop3'
 __do_sys_symlink fs/namei.c:4172 [inline]
 __se_sys_symlink fs/namei.c:4170 [inline]
 __x64_sys_symlink+0x59/0x80 fs/namei.c:4170
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457b57
Code: 0f 1f 00 b8 5c 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 6d bb fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 4d bb fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc56d5adf8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000457b57
RDX: 00007ffc56d5ae73 RSI: 00000000004bd62c RDI: 00007ffc56d5ae60
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013
R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000001c2c R15: 0000000000000000
Modules linked in:
CR2: 0000000000000080
kobject: 'loop5' (000000003070c326): kobject_uevent_env
Enabling of bearer <udp:
yz1> rejected, already enabled
---[ end trace 1c52884a79436198 ]---
kobject: 'loop5' (000000003070c326): fill_kobj_path: path = '/devices/virtual/block/loop5'
RIP: 0010:slab_equal_or_root mm/slab.h:228 [inline]
RIP: 0010:cache_from_obj mm/slab.h:374 [inline]
RIP: 0010:cache_from_obj mm/slab.h:356 [inline]
RIP: 0010:kmem_cache_free+0x207/0x260 mm/slab.c:3741
kobject: 'loop4' (0000000024e2daec): kobject_uevent_env
Code: ea ff ff 48 c1 e8 0c 48 c1 e0 06 48 01 d0 48 8b 50 08 48 8d 4a ff 83 e2 01 48 0f 45 c1 48 8b 40 18 49 39 c4 0f 84 19 fe ff ff <4c> 3b a0 80 00 00 00 0f 85 60 1e 00 00 49 89 c4 e9 04 fe ff ff 0f
kobject: 'loop4' (0000000024e2daec): fill_kobj_path: path = '/devices/virtual/block/loop4'
Enabling of bearer <udp:
yz1> rejected, already enabled
Enabling of bearer <udp:
yz1> rejected, already enabled
RSP: 0018:ffff888059ef7dd8 EFLAGS: 00010282
kobject: 'loop1' (00000000fdb7a23f): kobject_uevent_env
RAX: 0000000000000000 RBX: ffff88805ea7d800 RCX: ffffffffffffffff
kobject: 'loop1' (00000000fdb7a23f): fill_kobj_path: path = '/devices/virtual/block/loop1'
RDX: 0000000000000000 RSI: ffffffff81329bb4 RDI: 0000000000000007
RBP: ffff888059ef7df8 R08: ffff88809e9de400 R09: 0000000000000001
R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff88821bc45380
R13: ffff88805ea7d820 R14: ffff88821bc45380 R15: 00000000ffffff9c
FS:  0000000000c5c940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
kobject: 'loop2' (00000000fc3e2f62): kobject_uevent_env
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000070a158 CR3: 00000000908f0000 CR4: 00000000001406e0
kobject: 'loop2' (00000000fc3e2f62): fill_kobj_path: path = '/devices/virtual/block/loop2'
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400