RDX: 0000000000000040 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
BUG: unable to handle kernel NULL pointer dereference at 000000000000010e
IP: qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163
PGD 1be210067 P4D 1be210067 PUD 1c031b067 PMD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 3379 Comm: syz-executor7 Not tainted 4.15.0-rc3+ #131
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163
RSP: 0018:ffff8801be22fb18 EFLAGS: 00010246
RAX: ffff880100000100 RBX: 0000000000000282 RCX: 0000000000000000
RDX: ffffea0004000000 RSI: ffff88021fffae1f RDI: 0000000000000282
RBP: ffff8801be22fb50 R08: ffff88021fffae78 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000000000a R14: ffff880100000100 R15: ffffffff85ecb980
FS:  0000000000000000(0000) GS:ffff8801db500000(0063) knlGS:000000000965b900
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000000010e CR3: 00000001bf512000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 quarantine_reduce+0x141/0x170 mm/kasan/quarantine.c:259
 kasan_kmalloc+0xca/0xe0 mm/kasan/kasan.c:536
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489
 slab_post_alloc_hook mm/slab.h:442 [inline]
 slab_alloc mm/slab.c:3385 [inline]
 kmem_cache_alloc+0x11b/0x760 mm/slab.c:3545
 getname_flags+0xcb/0x580 fs/namei.c:138
 getname+0x19/0x20 fs/namei.c:209
 do_sys_open+0x2e7/0x6d0 fs/open.c:1053
 C_SYSC_open fs/open.c:1096 [inline]
 compat_SyS_open+0x2a/0x40 fs/open.c:1094
 do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline]
 do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389
 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:125
RIP: 0023:0xf7fcbc79
RSP: 002b:000000000847e980 EFLAGS: 00000206 ORIG_RAX: 0000000000000005
RAX: ffffffffffffffda RBX: 000000000847fa64 RCX: 0000000000098800
RDX: 0000000040000001 RSI: 00000000000605f1 RDI: 0000000000000000
RBP: 000000000847ea1c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Code: 55 48 89 e5 41 57 41 56 41 55 41 54 49 c7 c7 80 b9 ec 85 53 49 89 f4 48 83 ec 10 48 89 7d c8 4d 85 e4 4d 89 e5 0f 84 c8 00 00 00 <49> 63 95 04 01 00 00 4c 8b 30 48 29 d0 49 83 3f 00 48 89 c6 0f 
RIP: qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163 RSP: ffff8801be22fb18
CR2: 000000000000010e
---[ end trace f5540c3bd3842a34 ]---