==================================================================
BUG: KASAN: use-after-free in list_empty include/linux/list.h:189 [inline]
BUG: KASAN: use-after-free in sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2120
Read of size 8 at addr ffff8801cf3af6c0 by task syz-executor0/12225

CPU: 1 PID: 12225 Comm: syz-executor0 Not tainted 4.4.118-g239a415 #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 10780a631cf79092 ffff8800b77c79f0 ffffffff81d0402d
 ffffea00073cebc0 ffff8801cf3af6c0 0000000000000000 ffff8801cf3af6c0
 ffff8800b6d40238 ffff8800b77c7a28 ffffffff814fe103 ffff8801cf3af6c0
Call Trace:
 [<ffffffff81d0402d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0402d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fe103>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fe615>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fe615>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fe774>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff825b83a9>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff825b83a9>] sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2120
 [<ffffffff825b8925>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1837
 [<ffffffff825ba7cb>] sg_read+0xa1b/0x1490 drivers/scsi/sg.c:537
 [<ffffffff8151d7c1>] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680
 [<ffffffff8151fb1d>] do_readv_writev+0x5dd/0x6e0 fs/read_write.c:810
 [<ffffffff8151fc98>] vfs_readv+0x78/0xb0 fs/read_write.c:834
 [<ffffffff81521fc9>] SYSC_readv fs/read_write.c:860 [inline]
 [<ffffffff81521fc9>] SyS_readv+0xd9/0x240 fs/read_write.c:852
 [<ffffffff83772a5f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Allocated by task 8643:
 [<ffffffff81035d96>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd173>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fd43d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fd43d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814fda12>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff814f90ea>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff814f90ea>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff814f90ea>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff814f90ea>] kmem_cache_alloc+0xba/0x290 mm/slub.c:2628
 [<ffffffff8155857a>] fasync_alloc+0x1a/0x20 fs/fcntl.c:607
 [<ffffffff8161515b>] do_fcntl_add_lease fs/locks.c:1824 [inline]
 [<ffffffff8161515b>] fcntl_setlease+0xcb/0x220 fs/locks.c:1853
 [<ffffffff81557307>] do_fcntl fs/fcntl.c:328 [inline]
 [<ffffffff81557307>] SYSC_fcntl fs/fcntl.c:375 [inline]
 [<ffffffff81557307>] SyS_fcntl+0x6e7/0xc40 fs/fcntl.c:360
 [<ffffffff83772a5f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Freed by task 8643:
 [<ffffffff81035d96>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd173>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fda92>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fda92>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814fa1d7>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814fa1d7>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814fa1d7>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814fa1d7>] kmem_cache_free+0xc7/0x320 mm/slub.c:2881
 [<ffffffff8155859c>] fasync_free+0x1c/0x20 fs/fcntl.c:617
 [<ffffffff816151f8>] do_fcntl_add_lease fs/locks.c:1835 [inline]
 [<ffffffff816151f8>] fcntl_setlease+0x168/0x220 fs/locks.c:1853
 [<ffffffff81557307>] do_fcntl fs/fcntl.c:328 [inline]
 [<ffffffff81557307>] SYSC_fcntl fs/fcntl.c:375 [inline]
 [<ffffffff81557307>] SyS_fcntl+0x6e7/0xc40 fs/fcntl.c:360
 [<ffffffff83772a5f>] entry_SYSCALL_64_fastpath+0x1c/0x98

The buggy address belongs to the object at ffff8801cf3af680
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8801cf3af680, ffff8801cf3af6e0)
The buggy address belongs to the page:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.118-g239a415 #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffffffff84217840 task.stack: ffffffff84200000
RIP: 0010:[<ffffffff81277485>]  [<ffffffff81277485>] irqd_has_set kernel/irq/internals.h:188 [inline]
RIP: 0010:[<ffffffff81277485>]  [<ffffffff81277485>] irq_may_run+0x45/0x100 kernel/irq/chip.c:379
RSP: 0018:ffff8801db207e80  EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff8800b7739b80 RCX: ffffffff81277451
RDX: 0000000000000000 RSI: ffffffff84ad4068 RDI: ffff8800b7739bb0
RBP: ffff8801db207e98 R08: 0000000000000001 R09: ffffffff850ead10
R10: 0000000000000000 R11: 1ffff1003b640f9c R12: 0000000000000000
R13: ffffffff84207db0 R14: ffffffff84200000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006fc2d4 CR3: 00000001cc2ea000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8800b7739b80 ffff8800b7739bf4 ffffffff84207db0 ffff8801db207f00
 ffffffff81278759 ffffffff84218108 00000000db207f10 0000000000000046
 ffffffff84218110 0000000000000000 ffff8800b7739c20 ffff8800b7739b80
Call Trace:
 <IRQ> 
 [<ffffffff81278759>] handle_edge_irq+0x69/0x8e0 kernel/irq/chip.c:585
 [<ffffffff81016900>] generic_handle_irq_desc include/linux/irqdesc.h:140 [inline]
 [<ffffffff81016900>] handle_irq+0x250/0x3a0 arch/x86/kernel/irq_64.c:78
 [<ffffffff83775519>] do_IRQ+0x89/0x1b0 arch/x86/kernel/irq.c:239
 [<ffffffff837735e0>] common_interrupt+0xa0/0xa0 arch/x86/entry/entry_64.S:592
 <EOI> 
 [<ffffffff81027e85>] arch_safe_halt arch/x86/include/asm/paravirt.h:117 [inline]
 [<ffffffff81027e85>] default_idle+0x55/0x3c0 arch/x86/kernel/process.c:290
 [<ffffffff810293fa>] arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:281
 [<ffffffff81221468>] default_idle_call+0x48/0x70 kernel/sched/idle.c:93
 [<ffffffff81221b6d>] cpuidle_idle_call kernel/sched/idle.c:157 [inline]
 [<ffffffff81221b6d>] cpu_idle_loop kernel/sched/idle.c:253 [inline]
 [<ffffffff81221b6d>] cpu_startup_entry+0x5fd/0x8f0 kernel/sched/idle.c:301
 [<ffffffff8375f9a9>] rest_init+0x189/0x190 init/main.c:410
 [<ffffffff84822811>] start_kernel+0x6b9/0x6ee init/main.c:682
 [<ffffffff84821312>] x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:196
 [<ffffffff84821454>] x86_64_start_kernel+0x140/0x163 arch/x86/kernel/head64.c:185
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c2 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 63 30 4c 89 e2 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 89 00 00 00 41 f7 04 24 00 
RIP  [<ffffffff81277485>] irqd_has_set kernel/irq/internals.h:188 [inline]
RIP  [<ffffffff81277485>] irq_may_run+0x45/0x100 kernel/irq/chip.c:379
 RSP <ffff8801db207e80>
---[ end trace 824562dd29bbf2d4 ]---