FAULT_FLAG_ALLOW_RETRY missing a0
CPU: 0 PID: 10748 Comm: syz-executor4 Not tainted 4.9.70-g9542d2a #5
==================================================================
BUG: KASAN: slab-out-of-bounds in __lock_acquire+0x2eff/0x3640 kernel/locking/lockdep.c:3224 at addr ffff8801ca1e83f8
Read of size 8 by task syz-executor3/10773
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c3d574c8 ffffffff81d90a29 ffff8801c3d577a8 0000000000000000
 ffff8801ce71c710 ffff8801c3d57698 ffff8801ce71c600 ffff8801c3d576c0
 ffffffff8165e557 0000000000000000 0000000000005e64 ffff8801c7a920f0
Call Trace:
 [<ffffffff81d90a29>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d90a29>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8165e557>] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cd781>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cd781>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cd781>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cd781>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff814bca9a>] faultin_page mm/gup.c:386 [inline]
 [<ffffffff814bca9a>] __get_user_pages+0x39a/0x1010 mm/gup.c:585
 [<ffffffff814baa7d>] __get_user_pages_locked mm/gup.c:797 [inline]
 [<ffffffff814baa7d>] __get_user_pages_unlocked+0x19d/0x310 mm/gup.c:872
 [<ffffffff814ff612>] process_vm_rw_single_vec mm/process_vm_access.c:110 [inline]
 [<ffffffff814ff612>] process_vm_rw_core.isra.3+0x452/0xa70 mm/process_vm_access.c:218
 [<ffffffff81500030>] compat_process_vm_rw+0x1f0/0x210 mm/process_vm_access.c:342
 [<ffffffff8150015a>] C_SYSC_process_vm_readv mm/process_vm_access.c:358 [inline]
 [<ffffffff8150015a>] compat_SyS_process_vm_readv+0x4a/0x60 mm/process_vm_access.c:351
 [<ffffffff81006fc7>] do_syscall_32_irqs_on arch/x86/entry/common.c:322 [inline]
 [<ffffffff81006fc7>] do_fast_syscall_32+0x2f7/0x890 arch/x86/entry/common.c:384
 [<ffffffff838aba61>] entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
CPU: 1 PID: 10773 Comm: syz-executor3 Not tainted 4.9.70-g9542d2a #5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d552f7b0 ffffffff81d90a29 ffff8801d77fe500 ffff8801ca1e8380
 ffff8801ca1e83e0 ffffed003943d07f ffff8801ca1e83f8 ffff8801d552f7d8
 ffffffff8153a45c[   54.272468] FAULT_FLAG_ALLOW_RETRY missing a0
 ffffed003943d07f ffff8801d77fe500 0000000000000000
 [<ffffffff81d90a29>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d90a29>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153a45c>] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160
 [<ffffffff8153a71c>] print_address_description mm/kasan/report.c:198 [inline]
 [<ffffffff8153a71c>] kasan_report_error mm/kasan/report.c:287 [inline]
 [<ffffffff8153a71c>] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309
 [<ffffffff8153aab9>] kasan_report mm/kasan/report.c:330 [inline]
 [<ffffffff8153aab9>] __asan_report_load8_noabort+0x29/0x30 mm/kasan/report.c:330
 [<ffffffff8123c37f>] __lock_acquire+0x2eff/0x3640 kernel/locking/lockdep.c:3224
 [<ffffffff8123d4fe>] lock_acquire+0x12e/0x410 kernel/locking/lockdep.c:3756
 [<ffffffff838aa33e>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:186 [inline]
 [<ffffffff838aa33e>] _raw_write_lock_irqsave+0x4e/0x62 kernel/locking/spinlock.c:303
 [<ffffffff8265fe60>] sg_remove_request+0x70/0x120 drivers/scsi/sg.c:2122
 [<ffffffff82660475>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1838
 [<ffffffff826622ac>] sg_read+0xa1c/0x1440 drivers/scsi/sg.c:527
 [<ffffffff81568313>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156c0ae>] vfs_read+0x11e/0x380 fs/read_write.c:475
 [<ffffffff8156fdd9>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff8156fdd9>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff81006fc7>] do_syscall_32_irqs_on arch/x86/entry/common.c:322 [inline]
 [<ffffffff81006fc7>] do_fast_syscall_32+0x2f7/0x890 arch/x86/entry/common.c:384
 [<ffffffff838aba61>] entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
Object at ffff8801ca1e8380, in cache fasync_cache size: 96
CPU: 0 PID: 10765 Comm: syz-executor4 Not tainted 4.9.70-g9542d2a #5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c7b4f4c8 ffffffff81d90a29 ffff8801c7b4f7a8 0000000000000000
 ffff8801ce71c890 ffff8801c7b4f698 ffff8801ce71c780 ffff8801c7b4f6c0
 ffffffff8165e557 0000000000000000 0000000000005e64 ffff8801c40fd0f0
Call Trace:
 [<ffffffff81d90a29>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d90a29>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8165e557>] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cd781>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cd781>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cd781>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cd781>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff814bca9a>] faultin_page mm/gup.c:386 [inline]
 [<ffffffff814bca9a>] __get_user_pages+0x39a/0x1010 mm/gup.c:585
 [<ffffffff814baa7d>] __get_user_pages_locked mm/gup.c:797 [inline]
 [<ffffffff814baa7d>] __get_user_pages_unlocked+0x19d/0x310 mm/gup.c:872
 [<ffffffff814ff612>] process_vm_rw_single_vec mm/process_vm_access.c:110 [inline]
 [<ffffffff814ff612>] process_vm_rw_core.isra.3+0x452/0xa70 mm/process_vm_access.c:218
 [<ffffffff81500030>] compat_process_vm_rw+0x1f0/0x210 mm/process_vm_access.c:342
 [<ffffffff8150015a>] C_SYSC_process_vm_readv mm/process_vm_access.c:358 [inline]
 [<ffffffff8150015a>] compat_SyS_process_vm_readv+0x4a/0x60 mm/process_vm_access.c:351
 [<ffffffff81006fc7>] do_syscall_32_irqs_on arch/x86/entry/common.c:322 [inline]
 [<ffffffff81006fc7>] do_fast_syscall_32+0x2f7/0x890 arch/x86/entry/common.c:384
 [<ffffffff838aba61>] entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
Allocated:
PID = 10773
 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
 setfl fs/fcntl.c:70 [inline]
 do_fcntl fs/fcntl.c:267 [inline]
 SYSC_fcntl fs/fcntl.c:372 [inline]
 SyS_fcntl+0x658/0xc70 fs/fcntl.c:357
 C_SYSC_fcntl64 fs/compat.c:469 [inline]
 compat_SyS_fcntl64+0xce/0x4f0 fs/compat.c:403
 do_syscall_32_irqs_on arch/x86/entry/common.c:322 [inline]
 do_fast_syscall_32+0x2f7/0x890 arch/x86/entry/common.c:384
 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
Freed:
PID = 4401
 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_slab_free+0x73/0xc0 mm/kasan/kasan.c:571
 slab_free_hook mm/slub.c:1355 [inline]
 slab_free_freelist_hook mm/slub.c:1377 [inline]
 slab_free mm/slub.c:2958 [inline]
 kmem_cache_free+0xb2/0x2e0 mm/slub.c:2980
 fasync_free_rcu+0x1d/0x20 fs/fcntl.c:563
 __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 rcu_process_callbacks+0x871/0x12c0 kernel/rcu/tree.c:3037
 __do_softirq+0x206/0x951 kernel/softirq.c:284
Memory state around the buggy address:
 ffff8801ca1e8280: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8801ca1e8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff8801ca1e8380: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
                                                                ^
 ffff8801ca1e8400: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
 ffff8801ca1e8480: 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: 10773 Comm: syz-executor3 Tainted: G    B           4.9.70-g9542d2a #5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c55cb000 task.stack: ffff8801d5528000
RIP: 0010:[<ffffffff81239614>]  [<ffffffff81239614>] __lock_acquire+0x194/0x3640 kernel/locking/lockdep.c:3234
RSP: 0018:ffff8801d552f880  EFLAGS: 00010086
RAX: dead4ead00000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 1ffff1003943d080 RSI: 0000000000000000 RDI: ffff8801ca1e8400
RBP: ffff8801d552fa40 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8801c55cb000 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801ca1e83f8
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7733b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000205c5fc7 CR3: 00000001ca38d000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff814cb7b0 0000000000000004 ffff8801c55cb000 ffffed0038ab9715
 dffffc0000000000 ffff8801d8bd2080 0000000000000000 ffff8801c55cb8b0
 ffff8801c55cb888 ffff8801d552f980 0000000000000246 ffff8801c55cb000
Call Trace:
 [<ffffffff8123d4fe>] lock_acquire+0x12e/0x410 kernel/locking/lockdep.c:3756
 [<ffffffff838aa33e>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:186 [inline]
 [<ffffffff838aa33e>] _raw_write_lock_irqsave+0x4e/0x62 kernel/locking/spinlock.c:303
 [<ffffffff8265fe60>] sg_remove_request+0x70/0x120 drivers/scsi/sg.c:2122
 [<ffffffff82660475>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1838
 [<ffffffff826622ac>] sg_read+0xa1c/0x1440 drivers/scsi/sg.c:527
 [<ffffffff81568313>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156c0ae>] vfs_read+0x11e/0x380 fs/read_write.c:475
 [<ffffffff8156fdd9>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff8156fdd9>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff81006fc7>] do_syscall_32_irqs_on arch/x86/entry/common.c:322 [inline]
 [<ffffffff81006fc7>] do_fast_syscall_32+0x2f7/0x890 arch/x86/entry/common.c:384
 [<ffffffff838aba61>] entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
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  [<ffffffff81239614>] __lock_acquire+0x194/0x3640 kernel/locking/lockdep.c:3234
 RSP <ffff8801d552f880>
---[ end trace 5046716e8b47b779 ]---