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KASAN: slab-out-of-bounds Read in native_queued_spin_lock_slowpath (2)

Status: auto-closed as invalid on 2019/02/22 15:29
First crash: 2351d, last: 2351d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-44 KASAN: slab-out-of-bounds Read in native_queued_spin_lock_slowpath 1 2352d 2352d 0/2 closed as invalid on 2017/12/12 13:35
android-49 KASAN: slab-out-of-bounds Read in native_queued_spin_lock_slowpath 1168 2345d 2407d 0/3 closed as invalid on 2019/01/01 20:10

Sample crash report:
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1025 sclass=netlink_route_socket
==================================================================
BUG: KASAN: slab-out-of-bounds in __read_once_size include/linux/compiler.h:218 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in atomic_read arch/x86/include/asm/atomic.h:27 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352 at addr ffff8800b7eb57d4
	___slab_alloc.constprop.78+0x4c6/0x530 mm/slub.c:2475
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=6 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=6 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=6 cpu=0 pid=6756
	run_ksoftirqd+0x20/0x60 kernel/softirq.c:662
INFO: Freed in fasync_free_rcu+0x14/0x20 fs/fcntl.c:562 age=7 cpu=0 pid=3
BUG: KASAN: slab-out-of-bounds in __read_once_size include/linux/compiler.h:218 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in atomic_read arch/x86/include/asm/atomic.h:27 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352 at addr ffff8800b7eb57d4
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
	entry_SYSCALL_64_fastpath+0x16/0x76
	fasync_free_rcu+0x14/0x20 fs/fcntl.c:562
	___slab_alloc.constprop.78+0x4c6/0x530 mm/slub.c:2475
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
 [<ffffffff814db589>] kasan_report mm/kasan/report.c:282 [inline]
 [<ffffffff814db589>] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:282
	slab_free mm/slub.c:2840 [inline]
	kmem_cache_free+0x1f1/0x300 mm/slub.c:2849
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 [<ffffffff814db1f7>] print_address_description mm/kasan/report.c:139 [inline]
 [<ffffffff814db1f7>] kasan_report_error mm/kasan/report.c:237 [inline]
 [<ffffffff814db1f7>] kasan_report.part.2+0x227/0x530 mm/kasan/report.c:262
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
-----------------------------------------------------------------------------

 [<ffffffff814f6d8a>] __vfs_read+0xda/0x3e0 fs/read_write.c:432
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
BUG fasync_cache (Tainted: G    B          ): kasan: bad access detected
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
INFO: Slab 0xffffea0002dfad00 objects=20 used=3 fp=0xffff8800b7eb5a90 flags=0x4000000000004080
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

	entry_SYSCALL_64_fastpath+0x16/0x76
	entry_SYSCALL_64_fastpath+0x16/0x76
BUG: KASAN: slab-out-of-bounds in __read_once_size include/linux/compiler.h:218 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in atomic_read arch/x86/include/asm/atomic.h:27 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352 at addr ffff8800b7eb57d4
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 [<ffffffff814f6d8a>] __vfs_read+0xda/0x3e0 fs/read_write.c:432
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

	entry_SYSCALL_64_fastpath+0x16/0x76
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
	fasync_free_rcu+0x14/0x20 fs/fcntl.c:562
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 [<ffffffff814f6d8a>] __vfs_read+0xda/0x3e0 fs/read_write.c:432
 ffff8800b7eb5800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 [<ffffffff814d3af4>] print_trailer+0x114/0x1a0 mm/slub.c:682
Call Trace:
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
BUG fasync_cache (Tainted: G    B          ): kasan: bad access detected
 [<ffffffff8374a8b6>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:187 [inline]
 [<ffffffff8374a8b6>] _raw_write_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:303
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
	__rcu_reclaim kernel/rcu/rcu.h:118 [inline]
	rcu_do_batch kernel/rcu/tree.c:2705 [inline]
	invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
	__rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
	rcu_process_callbacks+0x7ff/0x1490 kernel/rcu/tree.c:2957
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
Read of size 4 by task syz-executor1/6756
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 [<ffffffff814d945f>] object_err+0x2f/0x40 mm/slub.c:689
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

	fasync_alloc fs/fcntl.c:603 [inline]
	fasync_add_entry fs/fcntl.c:661 [inline]
	fasync_helper+0x29/0x90 fs/fcntl.c:690
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
Call Trace:
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
 [<ffffffff8374a8b6>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:187 [inline]
 [<ffffffff8374a8b6>] _raw_write_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:303
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=117 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=117 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=117 cpu=0 pid=6756
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
BUG fasync_cache (Tainted: G    B          ): kasan: bad access detected
 [<ffffffff81cc9b4f>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81cc9b4f>] dump_stack+0x8e/0xcf lib/dump_stack.c:51
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
Call Trace:
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
Call Trace:
 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

                                                 ^
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
	setfl fs/fcntl.c:69 [inline]
	do_fcntl fs/fcntl.c:266 [inline]
	SYSC_fcntl fs/fcntl.c:371 [inline]
	SyS_fcntl+0x5be/0xc70 fs/fcntl.c:356
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
                                                 ^
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
Read of size 4 by task syz-executor1/6756
	run_ksoftirqd+0x20/0x60 kernel/softirq.c:662
Read of size 4 by task syz-executor1/6756
==================================================================
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
	fasync_free_rcu+0x14/0x20 fs/fcntl.c:562
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
 [<ffffffff81cc9b4f>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81cc9b4f>] dump_stack+0x8e/0xcf lib/dump_stack.c:51
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
 ffff8800b7eb5880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
=============================================================================
 [<ffffffff814f6d8a>] __vfs_read+0xda/0x3e0 fs/read_write.c:432
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 [<ffffffff814fb393>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff814fb393>] SyS_read+0xd3/0x1c0 fs/read_write.c:562
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

==================================================================
Read of size 4 by task syz-executor1/6756
 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
Read of size 4 by task syz-executor1/6756
	slab_free mm/slub.c:2840 [inline]
	kmem_cache_free+0x1f1/0x300 mm/slub.c:2849
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
Call Trace:
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
 [<ffffffff814fb393>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff814fb393>] SyS_read+0xd3/0x1c0 fs/read_write.c:562
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
Memory state around the buggy address:
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
	kthread+0x245/0x310 kernel/kthread.c:211
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
-----------------------------------------------------------------------------

CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
 [<ffffffff814d945f>] object_err+0x2f/0x40 mm/slub.c:689
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
BUG fasync_cache (Tainted: G    B          ): kasan: bad access detected
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
	run_ksoftirqd+0x20/0x60 kernel/softirq.c:662
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=236 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=236 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=236 cpu=0 pid=6756
	run_ksoftirqd+0x20/0x60 kernel/softirq.c:662
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
	entry_SYSCALL_64_fastpath+0x16/0x76
	fasync_free_rcu+0x14/0x20 fs/fcntl.c:562
	fasync_alloc fs/fcntl.c:603 [inline]
	fasync_add_entry fs/fcntl.c:661 [inline]
	fasync_helper+0x29/0x90 fs/fcntl.c:690
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

 ffff8800b7eb5880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
 [<ffffffff8374a8b6>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:187 [inline]
 [<ffffffff8374a8b6>] _raw_write_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:303
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
 ffff8800b7eb5800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
INFO: Freed in fasync_free_rcu+0x14/0x20 fs/fcntl.c:562 age=261 cpu=0 pid=3
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
Call Trace:
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
Memory state around the buggy address:
Memory state around the buggy address:
 [<ffffffff814db1f7>] print_address_description mm/kasan/report.c:139 [inline]
 [<ffffffff814db1f7>] kasan_report_error mm/kasan/report.c:237 [inline]
 [<ffffffff814db1f7>] kasan_report.part.2+0x227/0x530 mm/kasan/report.c:262
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
Call Trace:
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

	__rcu_reclaim kernel/rcu/rcu.h:118 [inline]
	rcu_do_batch kernel/rcu/tree.c:2705 [inline]
	invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
	__rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
	rcu_process_callbacks+0x7ff/0x1490 kernel/rcu/tree.c:2957
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
Memory state around the buggy address:
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
	kthread+0x245/0x310 kernel/kthread.c:211
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 [<ffffffff8123ab47>] queued_write_lock include/asm-generic/qrwlock.h:121 [inline]
 [<ffffffff8123ab47>] do_raw_write_lock+0xc7/0x1d0 kernel/locking/spinlock_debug.c:279
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
==================================================================
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 [<ffffffff8374a8b6>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:187 [inline]
 [<ffffffff8374a8b6>] _raw_write_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:303
                                                 ^
-----------------------------------------------------------------------------

Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
 [<ffffffff81cc9b4f>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81cc9b4f>] dump_stack+0x8e/0xcf lib/dump_stack.c:51
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
Memory state around the buggy address:
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

INFO: Freed in fasync_free_rcu+0x14/0x20 fs/fcntl.c:562 age=297 cpu=0 pid=3
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
Memory state around the buggy address:
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 ffff8800b7eb5800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
-----------------------------------------------------------------------------

	setfl fs/fcntl.c:69 [inline]
	do_fcntl fs/fcntl.c:266 [inline]
	SYSC_fcntl fs/fcntl.c:371 [inline]
	SyS_fcntl+0x5be/0xc70 fs/fcntl.c:356
	kthread+0x245/0x310 kernel/kthread.c:211
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
=============================================================================
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 [<ffffffff814f6d8a>] __vfs_read+0xda/0x3e0 fs/read_write.c:432
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
 [<ffffffff814db1f7>] print_address_description mm/kasan/report.c:139 [inline]
 [<ffffffff814db1f7>] kasan_report_error mm/kasan/report.c:237 [inline]
 [<ffffffff814db1f7>] kasan_report.part.2+0x227/0x530 mm/kasan/report.c:262
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
=============================================================================
INFO: Slab 0xffffea0002dfad00 objects=20 used=3 fp=0xffff8800b7eb5a90 flags=0x4000000000004080
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
	kthread+0x245/0x310 kernel/kthread.c:211
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
	run_ksoftirqd+0x20/0x60 kernel/softirq.c:662
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Memory state around the buggy address:
 [<ffffffff8123b9c6>] pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:696 [inline]
 [<ffffffff8123b9c6>] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:28 [inline]
 [<ffffffff8123b9c6>] queued_spin_lock include/asm-generic/qspinlock.h:102 [inline]
 [<ffffffff8123b9c6>] queued_write_lock_slowpath+0x116/0x150 kernel/locking/qrwlock.c:115
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
==================================================================
INFO: Freed in fasync_free_rcu+0x14/0x20 fs/fcntl.c:562 age=348 cpu=0 pid=3
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
	kthread+0x245/0x310 kernel/kthread.c:211
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
 [<ffffffff814d3af4>] print_trailer+0x114/0x1a0 mm/slub.c:682
 ffff8800b7eb5800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
=============================================================================
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
 [<ffffffff8123ab47>] queued_write_lock include/asm-generic/qrwlock.h:121 [inline]
 [<ffffffff8123ab47>] do_raw_write_lock+0xc7/0x1d0 kernel/locking/spinlock_debug.c:279
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

	__slab_free+0x18c/0x2b0 mm/slub.c:2685
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=381 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=381 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=381 cpu=0 pid=6756
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 [<ffffffff81cc9b4f>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81cc9b4f>] dump_stack+0x8e/0xcf lib/dump_stack.c:51
 ffff8800b7eb5880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
 [<ffffffff8123ab47>] queued_write_lock include/asm-generic/qrwlock.h:121 [inline]
 [<ffffffff8123ab47>] do_raw_write_lock+0xc7/0x1d0 kernel/locking/spinlock_debug.c:279
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
	__rcu_reclaim kernel/rcu/rcu.h:118 [inline]
	rcu_do_batch kernel/rcu/tree.c:2705 [inline]
	invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
	__rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
	rcu_process_callbacks+0x7ff/0x1490 kernel/rcu/tree.c:2957
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
Call Trace:
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 [<ffffffff814d3af4>] print_trailer+0x114/0x1a0 mm/slub.c:682
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
Call Trace:
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
	fasync_alloc fs/fcntl.c:603 [inline]
	fasync_add_entry fs/fcntl.c:661 [inline]
	fasync_helper+0x29/0x90 fs/fcntl.c:690
-----------------------------------------------------------------------------

	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
INFO: Slab 0xffffea0002dfad00 objects=20 used=3 fp=0xffff8800b7eb5a90 flags=0x4000000000004080
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
                                                 ^
 [<ffffffff814d945f>] object_err+0x2f/0x40 mm/slub.c:689
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
	run_ksoftirqd+0x20/0x60 kernel/softirq.c:662
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
INFO: Slab 0xffffea0002dfad00 objects=20 used=3 fp=0xffff8800b7eb5a90 flags=0x4000000000004080
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
	__rcu_reclaim kernel/rcu/rcu.h:118 [inline]
	rcu_do_batch kernel/rcu/tree.c:2705 [inline]
	invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
	__rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
	rcu_process_callbacks+0x7ff/0x1490 kernel/rcu/tree.c:2957
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
 [<ffffffff82564a50>] sg_remove_request+0x60/0x100 drivers/scsi/sg.c:2132
 [<ffffffff814d3af4>] print_trailer+0x114/0x1a0 mm/slub.c:682
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
	__rcu_reclaim kernel/rcu/rcu.h:118 [inline]
	rcu_do_batch kernel/rcu/tree.c:2705 [inline]
	invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
	__rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
	rcu_process_callbacks+0x7ff/0x1490 kernel/rcu/tree.c:2957
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
	___slab_alloc.constprop.78+0x4c6/0x530 mm/slub.c:2475
	__rcu_reclaim kernel/rcu/rcu.h:118 [inline]
	rcu_do_batch kernel/rcu/tree.c:2705 [inline]
	invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
	__rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
	rcu_process_callbacks+0x7ff/0x1490 kernel/rcu/tree.c:2957
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
 [<ffffffff81cc9b4f>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81cc9b4f>] dump_stack+0x8e/0xcf lib/dump_stack.c:51
	fasync_alloc fs/fcntl.c:603 [inline]
	fasync_add_entry fs/fcntl.c:661 [inline]
	fasync_helper+0x29/0x90 fs/fcntl.c:690
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
 [<ffffffff8123ab47>] queued_write_lock include/asm-generic/qrwlock.h:121 [inline]
 [<ffffffff8123ab47>] do_raw_write_lock+0xc7/0x1d0 kernel/locking/spinlock_debug.c:279
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
 [<ffffffff814fb393>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff814fb393>] SyS_read+0xd3/0x1c0 fs/read_write.c:562
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
 [<ffffffff814d945f>] object_err+0x2f/0x40 mm/slub.c:689
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=457 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=457 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=457 cpu=0 pid=6756
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 [<ffffffff814db1f7>] print_address_description mm/kasan/report.c:139 [inline]
 [<ffffffff814db1f7>] kasan_report_error mm/kasan/report.c:237 [inline]
 [<ffffffff814db1f7>] kasan_report.part.2+0x227/0x530 mm/kasan/report.c:262
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
==================================================================
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
Read of size 4 by task syz-executor1/6756
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                 ^
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

                                                 ^
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 [<ffffffff8123b9c6>] pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:696 [inline]
 [<ffffffff8123b9c6>] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:28 [inline]
 [<ffffffff8123b9c6>] queued_spin_lock include/asm-generic/qspinlock.h:102 [inline]
 [<ffffffff8123b9c6>] queued_write_lock_slowpath+0x116/0x150 kernel/locking/qrwlock.c:115
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
BUG fasync_cache (Tainted: G    B          ): kasan: bad access detected
 [<ffffffff8123ab47>] queued_write_lock include/asm-generic/qrwlock.h:121 [inline]
 [<ffffffff8123ab47>] do_raw_write_lock+0xc7/0x1d0 kernel/locking/spinlock_debug.c:279
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
	fasync_free_rcu+0x14/0x20 fs/fcntl.c:562
INFO: Slab 0xffffea0002dfad00 objects=20 used=3 fp=0xffff8800b7eb5a90 flags=0x4000000000004080
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
Memory state around the buggy address:
 [<ffffffff814d3af4>] print_trailer+0x114/0x1a0 mm/slub.c:682
 ffff8800b7eb5880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 [<ffffffff814db589>] kasan_report mm/kasan/report.c:282 [inline]
 [<ffffffff814db589>] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:282
 ffff8800b7eb5880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
Call Trace:
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 [<ffffffff814fb393>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff814fb393>] SyS_read+0xd3/0x1c0 fs/read_write.c:562
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
INFO: Slab 0xffffea0002dfad00 objects=20 used=3 fp=0xffff8800b7eb5a90 flags=0x4000000000004080
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
Memory state around the buggy address:
INFO: Freed in fasync_free_rcu+0x14/0x20 fs/fcntl.c:562 age=524 cpu=0 pid=3
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 ffff8800b7eb5800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
Call Trace:
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

BUG fasync_cache (Tainted: G    B          ): kasan: bad access detected
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

-----------------------------------------------------------------------------

Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
BUG fasync_cache (Tainted: G    B          ): kasan: bad access detected
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
	slab_free mm/slub.c:2840 [inline]
	kmem_cache_free+0x1f1/0x300 mm/slub.c:2849
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
 [<ffffffff814d945f>] object_err+0x2f/0x40 mm/slub.c:689
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 [<ffffffff814d945f>] object_err+0x2f/0x40 mm/slub.c:689
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
 [<ffffffff8374a8b6>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:187 [inline]
 [<ffffffff8374a8b6>] _raw_write_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:303
 ffff8800b7eb5800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 ffff8800b7eb5880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 [<ffffffff814fb393>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff814fb393>] SyS_read+0xd3/0x1c0 fs/read_write.c:562
	fasync_alloc fs/fcntl.c:603 [inline]
	fasync_add_entry fs/fcntl.c:661 [inline]
	fasync_helper+0x29/0x90 fs/fcntl.c:690
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 [<ffffffff8123ab47>] queued_write_lock include/asm-generic/qrwlock.h:121 [inline]
 [<ffffffff8123ab47>] do_raw_write_lock+0xc7/0x1d0 kernel/locking/spinlock_debug.c:279
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
==================================================================
 [<ffffffff814d3af4>] print_trailer+0x114/0x1a0 mm/slub.c:682
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 [<ffffffff814fb393>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff814fb393>] SyS_read+0xd3/0x1c0 fs/read_write.c:562
	entry_SYSCALL_64_fastpath+0x16/0x76
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 [<ffffffff814f6d8a>] __vfs_read+0xda/0x3e0 fs/read_write.c:432
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
==================================================================
 [<ffffffff8123ab47>] queued_write_lock include/asm-generic/qrwlock.h:121 [inline]
 [<ffffffff8123ab47>] do_raw_write_lock+0xc7/0x1d0 kernel/locking/spinlock_debug.c:279
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
                                                 ^
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 [<ffffffff814d945f>] object_err+0x2f/0x40 mm/slub.c:689
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
	__rcu_reclaim kernel/rcu/rcu.h:118 [inline]
	rcu_do_batch kernel/rcu/tree.c:2705 [inline]
	invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
	__rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
	rcu_process_callbacks+0x7ff/0x1490 kernel/rcu/tree.c:2957
	run_ksoftirqd+0x20/0x60 kernel/softirq.c:662
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
	__rcu_reclaim kernel/rcu/rcu.h:118 [inline]
	rcu_do_batch kernel/rcu/tree.c:2705 [inline]
	invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
	__rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
	rcu_process_callbacks+0x7ff/0x1490 kernel/rcu/tree.c:2957
Call Trace:
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
	slab_free mm/slub.c:2840 [inline]
	kmem_cache_free+0x1f1/0x300 mm/slub.c:2849
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
Memory state around the buggy address:
 [<ffffffff8123b9c6>] pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:696 [inline]
 [<ffffffff8123b9c6>] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:28 [inline]
 [<ffffffff8123b9c6>] queued_spin_lock include/asm-generic/qspinlock.h:102 [inline]
 [<ffffffff8123b9c6>] queued_write_lock_slowpath+0x116/0x150 kernel/locking/qrwlock.c:115
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
	fasync_free_rcu+0x14/0x20 fs/fcntl.c:562
==================================================================
 [<ffffffff8123648d>] __read_once_size include/linux/compiler.h:218 [inline]
 [<ffffffff8123648d>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 [<ffffffff8123648d>] virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline]
 [<ffffffff8123648d>] native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
 [<ffffffff82564a50>] sg_remove_request+0x60/0x100 drivers/scsi/sg.c:2132
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 [<ffffffff82564a50>] sg_remove_request+0x60/0x100 drivers/scsi/sg.c:2132
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
 [<ffffffff814db589>] kasan_report mm/kasan/report.c:282 [inline]
 [<ffffffff814db589>] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:282
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
	fasync_free_rcu+0x14/0x20 fs/fcntl.c:562
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
 [<ffffffff8374a8b6>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:187 [inline]
 [<ffffffff8374a8b6>] _raw_write_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:303
BUG: KASAN: slab-out-of-bounds in __read_once_size include/linux/compiler.h:218 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in atomic_read arch/x86/include/asm/atomic.h:27 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352 at addr ffff8800b7eb57d4
Call Trace:
                                                 ^
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
 [<ffffffff814d3af4>] print_trailer+0x114/0x1a0 mm/slub.c:682
	___slab_alloc.constprop.78+0x4c6/0x530 mm/slub.c:2475
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 ffff8800b7eb5880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
Memory state around the buggy address:
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
 [<ffffffff814fb393>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff814fb393>] SyS_read+0xd3/0x1c0 fs/read_write.c:562
=============================================================================
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
	fasync_free_rcu+0x14/0x20 fs/fcntl.c:562
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
	kthread+0x245/0x310 kernel/kthread.c:211
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
 [<ffffffff82564a50>] sg_remove_request+0x60/0x100 drivers/scsi/sg.c:2132
Memory state around the buggy address:
 [<ffffffff814db1f7>] print_address_description mm/kasan/report.c:139 [inline]
 [<ffffffff814db1f7>] kasan_report_error mm/kasan/report.c:237 [inline]
 [<ffffffff814db1f7>] kasan_report.part.2+0x227/0x530 mm/kasan/report.c:262
 [<ffffffff8123ab47>] queued_write_lock include/asm-generic/qrwlock.h:121 [inline]
 [<ffffffff8123ab47>] do_raw_write_lock+0xc7/0x1d0 kernel/locking/spinlock_debug.c:279
Call Trace:
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

	__slab_free+0x18c/0x2b0 mm/slub.c:2685
 [<ffffffff8123b9c6>] pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:696 [inline]
 [<ffffffff8123b9c6>] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:28 [inline]
 [<ffffffff8123b9c6>] queued_spin_lock include/asm-generic/qspinlock.h:102 [inline]
 [<ffffffff8123b9c6>] queued_write_lock_slowpath+0x116/0x150 kernel/locking/qrwlock.c:115
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
	slab_free mm/slub.c:2840 [inline]
	kmem_cache_free+0x1f1/0x300 mm/slub.c:2849
	slab_free mm/slub.c:2840 [inline]
	kmem_cache_free+0x1f1/0x300 mm/slub.c:2849
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
 [<ffffffff814d3af4>] print_trailer+0x114/0x1a0 mm/slub.c:682
==================================================================
 [<ffffffff814d3af4>] print_trailer+0x114/0x1a0 mm/slub.c:682
==================================================================
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
	entry_SYSCALL_64_fastpath+0x16/0x76
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
Call Trace:
==================================================================
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
	___slab_alloc.constprop.78+0x4c6/0x530 mm/slub.c:2475
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 [<ffffffff814f6d8a>] __vfs_read+0xda/0x3e0 fs/read_write.c:432
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
	slab_free mm/slub.c:2840 [inline]
	kmem_cache_free+0x1f1/0x300 mm/slub.c:2849
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
                                                 ^
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
 [<ffffffff814db589>] kasan_report mm/kasan/report.c:282 [inline]
 [<ffffffff814db589>] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:282
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
	kthread+0x245/0x310 kernel/kthread.c:211
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
Memory state around the buggy address:
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
 [<ffffffff8374a8b6>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:187 [inline]
 [<ffffffff8374a8b6>] _raw_write_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:303
Call Trace:
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
 [<ffffffff8374a8b6>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:187 [inline]
 [<ffffffff8374a8b6>] _raw_write_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:303
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
 [<ffffffff814db1f7>] print_address_description mm/kasan/report.c:139 [inline]
 [<ffffffff814db1f7>] kasan_report_error mm/kasan/report.c:237 [inline]
 [<ffffffff814db1f7>] kasan_report.part.2+0x227/0x530 mm/kasan/report.c:262
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
	fasync_alloc fs/fcntl.c:603 [inline]
	fasync_add_entry fs/fcntl.c:661 [inline]
	fasync_helper+0x29/0x90 fs/fcntl.c:690
INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=756 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=756 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=756 cpu=0 pid=6756
	run_ksoftirqd+0x20/0x60 kernel/softirq.c:662
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
Call Trace:
 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 [<ffffffff814db589>] kasan_report mm/kasan/report.c:282 [inline]
 [<ffffffff814db589>] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:282
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
Read of size 4 by task syz-executor1/6756
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
 [<ffffffff81cc9b4f>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81cc9b4f>] dump_stack+0x8e/0xcf lib/dump_stack.c:51
	fasync_free_rcu+0x14/0x20 fs/fcntl.c:562
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
BUG: KASAN: slab-out-of-bounds in __read_once_size include/linux/compiler.h:218 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in atomic_read arch/x86/include/asm/atomic.h:27 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352 at addr ffff8800b7eb57d4
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=778 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=778 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=778 cpu=0 pid=6756
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
                                                 ^
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
 [<ffffffff814d945f>] object_err+0x2f/0x40 mm/slub.c:689
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
 ffff8800b7eb5800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 [<ffffffff81cc9b4f>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81cc9b4f>] dump_stack+0x8e/0xcf lib/dump_stack.c:51
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
                                                 ^
==================================================================
 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
INFO: Slab 0xffffea0002dfad00 objects=20 used=3 fp=0xffff8800b7eb5a90 flags=0x4000000000004080
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=805 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=805 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=805 cpu=0 pid=6756
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
-----------------------------------------------------------------------------

                                                 ^
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=812 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=812 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=812 cpu=0 pid=6756
	__rcu_reclaim kernel/rcu/rcu.h:118 [inline]
	rcu_do_batch kernel/rcu/tree.c:2705 [inline]
	invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
	__rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
	rcu_process_callbacks+0x7ff/0x1490 kernel/rcu/tree.c:2957
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 [<ffffffff814db589>] kasan_report mm/kasan/report.c:282 [inline]
 [<ffffffff814db589>] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:282
Memory state around the buggy address:
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
Memory state around the buggy address:
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
                                                 ^
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
BUG fasync_cache (Tainted: G    B          ): kasan: bad access detected
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
	slab_free mm/slub.c:2840 [inline]
	kmem_cache_free+0x1f1/0x300 mm/slub.c:2849
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 [<ffffffff814db589>] kasan_report mm/kasan/report.c:282 [inline]
 [<ffffffff814db589>] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:282
                                                 ^
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
INFO: Slab 0xffffea0002dfad00 objects=20 used=3 fp=0xffff8800b7eb5a90 flags=0x4000000000004080
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
	fasync_free_rcu+0x14/0x20 fs/fcntl.c:562
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
INFO: Slab 0xffffea0002dfad00 objects=20 used=3 fp=0xffff8800b7eb5a90 flags=0x4000000000004080
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
==================================================================
                                                 ^
=============================================================================
 [<ffffffff814db1f7>] print_address_description mm/kasan/report.c:139 [inline]
 [<ffffffff814db1f7>] kasan_report_error mm/kasan/report.c:237 [inline]
 [<ffffffff814db1f7>] kasan_report.part.2+0x227/0x530 mm/kasan/report.c:262
Read of size 4 by task syz-executor1/6756
 [<ffffffff814fb393>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff814fb393>] SyS_read+0xd3/0x1c0 fs/read_write.c:562
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 [<ffffffff814f6d8a>] __vfs_read+0xda/0x3e0 fs/read_write.c:432
	__slab_alloc.isra.74.constprop.77+0x50/0xa0 mm/slub.c:2504
BUG fasync_cache (Tainted: G    B          ): kasan: bad access detected
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
Read of size 4 by task syz-executor1/6756
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=900 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=900 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=900 cpu=0 pid=6756
Object ffff8800b7eb5780: ff ff ff ff ff ff ff ff 80 e3 70 85 ff ff ff ff  ..........p.....
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
Call Trace:
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

==================================================================
 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=909 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=909 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=909 cpu=0 pid=6756
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=911 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=911 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=911 cpu=0 pid=6756
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
INFO: Slab 0xffffea0002dfad00 objects=20 used=3 fp=0xffff8800b7eb5a90 flags=0x4000000000004080
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
Object ffff8800b7eb57a0: 00 50 8b 83 ff ff ff ff 01 46 00 00 07 00 00 00  .P.......F......
	sg_fasync+0x66/0xb0 drivers/scsi/sg.c:1213
INFO: Allocated in fasync_alloc fs/fcntl.c:603 [inline] age=920 cpu=0 pid=6756
INFO: Allocated in fasync_add_entry fs/fcntl.c:661 [inline] age=920 cpu=0 pid=6756
INFO: Allocated in fasync_helper+0x29/0x90 fs/fcntl.c:690 age=920 cpu=0 pid=6756
	setfl fs/fcntl.c:69 [inline]
	do_fcntl fs/fcntl.c:266 [inline]
	SYSC_fcntl fs/fcntl.c:371 [inline]
	SyS_fcntl+0x5be/0xc70 fs/fcntl.c:356
 [<ffffffff814fb393>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff814fb393>] SyS_read+0xd3/0x1c0 fs/read_write.c:562
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
	ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
Memory state around the buggy address:
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
	smpboot_thread_fn+0x55f/0x920 kernel/smpboot.c:163
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
BUG: KASAN: slab-out-of-bounds in __read_once_size include/linux/compiler.h:218 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in atomic_read arch/x86/include/asm/atomic.h:27 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline] at addr ffff8800b7eb57d4
BUG: KASAN: slab-out-of-bounds in native_queued_spin_lock_slowpath+0x5ad/0x660 kernel/locking/qspinlock.c:352 at addr ffff8800b7eb57d4
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
Object ffff8800b7eb5790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 [<ffffffff814f6d8a>] __vfs_read+0xda/0x3e0 fs/read_write.c:432
Bytes b4 ffff8800b7eb5760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 [<ffffffff814db1f7>] print_address_description mm/kasan/report.c:139 [inline]
 [<ffffffff814db1f7>] kasan_report_error mm/kasan/report.c:237 [inline]
 [<ffffffff814db1f7>] kasan_report.part.2+0x227/0x530 mm/kasan/report.c:262
 [<ffffffff814f6d8a>] __vfs_read+0xda/0x3e0 fs/read_write.c:432
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

-----------------------------------------------------------------------------

 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
	slab_alloc_node mm/slub.c:2567 [inline]
	slab_alloc mm/slub.c:2609 [inline]
	kmem_cache_alloc+0x155/0x290 mm/slub.c:2614
 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
 [<ffffffff8123b9c6>] pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:696 [inline]
 [<ffffffff8123b9c6>] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:28 [inline]
 [<ffffffff8123b9c6>] queued_spin_lock include/asm-generic/qspinlock.h:102 [inline]
 [<ffffffff8123b9c6>] queued_write_lock_slowpath+0x116/0x150 kernel/locking/qrwlock.c:115
 ffff8800b7eb5880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 [<ffffffff814f8a21>] vfs_read+0xe1/0x340 fs/read_write.c:454
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 ffff8800b7eb5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
 [<ffffffff82564a50>] sg_remove_request+0x60/0x100 drivers/scsi/sg.c:2132
Call Trace:
	run_ksoftirqd+0x20/0x60 kernel/softirq.c:662
>ffff8800b7eb5780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 [<ffffffff814d3af4>] print_trailer+0x114/0x1a0 mm/slub.c:682
Read of size 4 by task syz-executor1/6756
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
 ffff8800b7eb4010 ffff8800b7eb5770 ffff8801d2e979e0 ffffffff814d3af4
Object ffff8800b7eb5770: 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
Object ffff8800b7eb57b0: 00 00 00 00 00 00 00 00 00 cc 1c b7 00 88 ff ff  ................
 [<ffffffff82564ff5>] sg_finish_rem_req+0x255/0x2f0 drivers/scsi/sg.c:1848
 [<ffffffff8123ab47>] queued_write_lock include/asm-generic/qrwlock.h:121 [inline]
 [<ffffffff8123ab47>] do_raw_write_lock+0xc7/0x1d0 kernel/locking/spinlock_debug.c:279
INFO: Freed in fasync_free_rcu+0x14/0x20 fs/fcntl.c:562 age=983 cpu=0 pid=3
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
CPU: 0 PID: 6756 Comm: syz-executor1 Tainted: G    B           4.4.105-ge303a83 #5
Object ffff8800b7eb57c0: 00 c3 82 d2 01 88 ff ff 30 f5 52 81 ff ff ff ff  ........0.R.....
	__slab_free+0x18c/0x2b0 mm/slub.c:2685
 [<ffffffff82566a87>] sg_read+0x767/0x1260 drivers/scsi/sg.c:538
	__do_softirq+0x24d/0xa60 kernel/softirq.c:273
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
 [<ffffffff814fb393>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff814fb393>] SyS_read+0xd3/0x1c0 fs/read_write.c:562
 ffff8800b7eb5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801d9402c00 ffffea0002dfad00 ffff8800b7eb5770 0000000000000000
INFO: Object 0xffff8800b7eb5770 @offset=6000 fp=0xdead4ead00000000

==================================================================
 0000000000000000 263dc65b38caca23 ffff8801d2e979b0 ffffffff81cc9b4f
	setfl fs/fcntl.c:69 [inline]
	do_fcntl fs/fcntl.c:266 [inline]
	SYSC_fcntl fs/fcntl.c:371 [inline]
	SyS_fcntl+0x5be/0xc70 fs/fcntl.c:356

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2017/12/13 09:46 https://android.googlesource.com/kernel/common android-4.4 e303a832d93e ce7f2399 .config console log report ci-android-44-kasan-gce
2017/12/13 00:18 https://android.googlesource.com/kernel/common android-4.4 e303a832d93e 414a185f .config console log report ci-android-44-kasan-gce
2017/12/12 20:02 https://android.googlesource.com/kernel/common android-4.4 e303a832d93e 414a185f .config console log report ci-android-44-kasan-gce
2017/12/12 15:02 https://android.googlesource.com/kernel/common android-4.4 36205b7fa963 414a185f .config console log report ci-android-44-kasan-gce
* Struck through repros no longer work on HEAD.