==================================================================
BUG: KASAN: slab-out-of-bounds in __lock_acquire+0x2eff/0x3640 kernel/locking/lockdep.c:3224 at addr ffff8801a819c8f8
nla_parse: 4 callbacks suppressed
netlink: 8 bytes leftover after parsing attributes in process `syz-executor1'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor1'.
Read of size 8 by task syz-executor3/7223
CPU: 1 PID: 7223 Comm: syz-executor3 Not tainted 4.9.67-gf26d3c7 #106
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c7ef7810 ffffffff81d906e9 ffff8801d77ec140 ffff8801a819c880
 ffff8801a819c8e0 ffffed003503391f ffff8801a819c8f8 ffff8801c7ef7838
 ffffffff8153a2cc ffffed003503391f ffff8801d77ec140 0000000000000000
Call Trace:
 [<ffffffff81d906e9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d906e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153a2cc>] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160
 [<ffffffff8153a58c>] print_address_description mm/kasan/report.c:198 [inline]
 [<ffffffff8153a58c>] kasan_report_error mm/kasan/report.c:287 [inline]
 [<ffffffff8153a58c>] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309
 [<ffffffff8153a929>] kasan_report mm/kasan/report.c:330 [inline]
 [<ffffffff8153a929>] __asan_report_load8_noabort+0x29/0x30 mm/kasan/report.c:330
 [<ffffffff8123c36f>] __lock_acquire+0x2eff/0x3640 kernel/locking/lockdep.c:3224
 [<ffffffff8123d4ee>] lock_acquire+0x12e/0x410 kernel/locking/lockdep.c:3756
 [<ffffffff838a98ce>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:186 [inline]
 [<ffffffff838a98ce>] _raw_write_lock_irqsave+0x4e/0x62 kernel/locking/spinlock.c:303
 [<ffffffff8265f4c0>] sg_remove_request+0x70/0x120 drivers/scsi/sg.c:2122
 [<ffffffff8265fad5>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1838
 [<ffffffff8266190c>] sg_read+0xa1c/0x1440 drivers/scsi/sg.c:527
 [<ffffffff815680d3>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156be6e>] vfs_read+0x11e/0x380 fs/read_write.c:475
 [<ffffffff8156fb99>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff8156fb99>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
Object at ffff8801a819c880, in cache fasync_cache size: 96
Allocated:
PID = 7214
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 save_stack+0x43/0xd0 mm/kasan/kasan.c:495
 set_track mm/kasan/kasan.c:507 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:537
 slab_post_alloc_hook mm/slab.h:417 [inline]
 slab_alloc_node mm/slub.c:2715 [inline]
 slab_alloc mm/slub.c:2723 [inline]
 kmem_cache_alloc+0xba/0x290 mm/slub.c:2728
 fasync_alloc fs/fcntl.c:604 [inline]
 fasync_add_entry fs/fcntl.c:662 [inline]
 fasync_helper+0x37/0xb0 fs/fcntl.c:691
 sg_fasync+0x86/0xb0 drivers/scsi/sg.c:1203
 ioctl_fioasync fs/ioctl.c:534 [inline]
 do_vfs_ioctl+0x2d8/0x1140 fs/ioctl.c:639
 SYSC_ioctl fs/ioctl.c:694 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685
 entry_SYSCALL_64_fastpath+0x23/0xc6
Freed:
PID = 0
(stack is not available)
Memory state around the buggy address:
 ffff8801a819c780: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8801a819c800: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff8801a819c880: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
                                                                ^
 ffff8801a819c900: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
 ffff8801a819c980: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
==================================================================
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 7223 Comm: syz-executor3 Tainted: G    B           4.9.67-gf26d3c7 #106
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801cee58000 task.stack: ffff8801c7ef0000
RIP: 0010:[<ffffffff81239604>]  [<ffffffff81239604>] __lock_acquire+0x194/0x3640 kernel/locking/lockdep.c:3234
RSP: 0018:ffff8801c7ef78e0  EFLAGS: 00010086
RAX: dead4ead00000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 1ffff10035033920 RSI: 0000000000000000 RDI: ffff8801a819c900
RBP: ffff8801c7ef7aa0 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8801cee58000 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801a819c8f8
FS:  00007f480e894700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020aff000 CR3: 00000001d1f49000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 00000000024000c0 ffff8801a682e868 ffff8801da0018c0 ffff8801c7ef7b28
 ffffffff81539613 0000004000000009 ffff8801cee58000 ffff8801cee588b0
 00000000000002a3 0000000000000002 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff8123d4ee>] lock_acquire+0x12e/0x410 kernel/locking/lockdep.c:3756
 [<ffffffff838a98ce>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:186 [inline]
 [<ffffffff838a98ce>] _raw_write_lock_irqsave+0x4e/0x62 kernel/locking/spinlock.c:303
 [<ffffffff8265f4c0>] sg_remove_request+0x70/0x120 drivers/scsi/sg.c:2122
 [<ffffffff8265fad5>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1838
 [<ffffffff8266190c>] sg_read+0xa1c/0x1440 drivers/scsi/sg.c:527
 [<ffffffff815680d3>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156be6e>] vfs_read+0x11e/0x380 fs/read_write.c:475
 [<ffffffff8156fb99>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff8156fb99>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
Code: 9e ff ff 44 8b 94 24 98 00 00 00 48 85 c0 8b 8c 24 90 00 00 00 44 8b 8c 24 88 00 00 00 4c 8b 9c 24 80 00 00 00 0f 84 ff 07 00 00 <f0> ff 80 98 01 00 00 49 8d b3 a8 08 00 00 48 ba 00 00 00 00 00 
RIP  [<ffffffff81239604>] __lock_acquire+0x194/0x3640 kernel/locking/lockdep.c:3234
 RSP <ffff8801c7ef78e0>
---[ end trace 7bf2cefce8390eae ]---