==================================================================
BUG: KASAN: slab-out-of-bounds in hlist_move_list include/linux/list.h:843 [inline]
BUG: KASAN: slab-out-of-bounds in __collect_expired_timers kernel/time/timer.c:1482 [inline]
BUG: KASAN: slab-out-of-bounds in collect_expired_timers kernel/time/timer.c:1717 [inline]
BUG: KASAN: slab-out-of-bounds in __run_timers+0x507/0x740 kernel/time/timer.c:1781
Write of size 8 at addr ffff8881e1cf31c8 by task syz-executor.5/19507

CPU: 1 PID: 19507 Comm: syz-executor.5 Not tainted 5.4.123-syzkaller-00835-g3e256ddba1ff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x24e lib/dump_stack.c:118
 print_address_description+0x9b/0x650 mm/kasan/report.c:384
 __kasan_report+0x182/0x260 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:641
 hlist_move_list include/linux/list.h:843 [inline]
 __collect_expired_timers kernel/time/timer.c:1482 [inline]
 collect_expired_timers kernel/time/timer.c:1717 [inline]
 __run_timers+0x507/0x740 kernel/time/timer.c:1781
 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1798
 __do_softirq+0x23e/0x615 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x195/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:537 [inline]
 smp_apic_timer_interrupt+0x113/0x420 arch/x86/kernel/apic/apic.c:1150
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:831
 </IRQ>
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x4d/0x80 kernel/locking/spinlock.c:191
Code: 74 0c 48 c7 c7 70 d1 ea 85 e8 7f a5 4d fd 48 83 3d a7 73 a4 01 00 74 36 48 89 df e8 fd d7 06 fd 66 90 4c 89 34 24 ff 34 24 9d <bf> 01 00 00 00 e8 49 2d 00 fd 65 8b 05 9e 8f bb 7b 85 c0 74 08 48
RSP: 0018:ffff8881db46f720 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881de7163e4 RCX: dffffc0000000000
RDX: ffffc900018e7000 RSI: 0000000000000246 RDI: ffff8881de7163e4
RBP: ffff8881db46f830 R08: ffffffff82279c9d R09: 0000000000000003
R10: ffffed103b68dec5 R11: 0000000000000004 R12: ffff8881db46f920
R13: ffff8881de7163e4 R14: 0000000000000246 R15: ffff8881a7554280
 spin_unlock_irqrestore include/linux/spinlock.h:393 [inline]
 __skb_try_recv_datagram+0x1c2/0x5b0 net/core/datagram.c:272
 unix_dgram_recvmsg+0x2cb/0x1080 net/unix/af_unix.c:2070
 ____sys_recvmsg+0x1d1/0x440 net/socket.c:2530
 ___sys_recvmsg net/socket.c:2571 [inline]
 do_recvmmsg+0x568/0xb40 net/socket.c:2682
 __sys_recvmmsg net/socket.c:2761 [inline]
 __do_sys_recvmmsg net/socket.c:2784 [inline]
 __se_sys_recvmmsg net/socket.c:2777 [inline]
 __x64_sys_recvmmsg+0x195/0x240 net/socket.c:2777
 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4665d9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f70d0e58188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665d9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 000000000056c038
R13: 00007ffc89434edf R14: 00007f70d0e58300 R15: 0000000000022000

Allocated by task 0:
(stack is not available)

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8881e1cf3180
 which belongs to the cache sgpool-32 of size 1024
The buggy address is located 72 bytes inside of
 1024-byte region [ffff8881e1cf3180, ffff8881e1cf3580)
The buggy address belongs to the page:
page:ffffea0007873c00 refcount:1 mapcount:0 mapping:ffff8881f09b5900 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f09b5900
raw: 0000000000000000 00000000800e000e 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x19a/0x380 mm/page_alloc.c:2171
 get_page_from_freelist+0x550/0x8b0 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x3a2/0x880 mm/page_alloc.c:4855
 alloc_slab_page+0x39/0x3e0 mm/slub.c:342
 allocate_slab mm/slub.c:1675 [inline]
 new_slab+0x97/0x460 mm/slub.c:1741
 new_slab_objects mm/slub.c:2498 [inline]
 ___slab_alloc+0x330/0x4c0 mm/slub.c:2659
 __slab_alloc mm/slub.c:2699 [inline]
 slab_alloc_node mm/slub.c:2784 [inline]
 slab_alloc mm/slub.c:2829 [inline]
 kmem_cache_alloc+0x18b/0x290 mm/slub.c:2834
 mempool_alloc_slab+0x16/0x20 mm/mempool.c:513
 mempool_alloc+0x113/0x680 mm/mempool.c:393
 __sg_alloc_table+0xca/0x3a0 lib/scatterlist.c:302
 sg_alloc_table_chained+0xe0/0x1d0 lib/sg_pool.c:132
 scsi_init_sgtable drivers/scsi/scsi_lib.c:998 [inline]
 scsi_init_io+0xff/0x340 drivers/scsi/scsi_lib.c:1033
 sd_setup_read_write_cmnd drivers/scsi/sd.c:1176 [inline]
 sd_init_command+0xb53/0x2aa0 drivers/scsi/sd.c:1292
 scsi_setup_fs_cmnd drivers/scsi/scsi_lib.c:1215 [inline]
 scsi_setup_cmnd drivers/scsi/scsi_lib.c:1234 [inline]
 scsi_mq_prep_fn drivers/scsi/scsi_lib.c:1615 [inline]
 scsi_queue_rq+0x1780/0x2720 drivers/scsi/scsi_lib.c:1683
 blk_mq_dispatch_rq_list+0x90c/0x17e0 block/blk-mq.c:1297
 blk_mq_do_dispatch_sched+0x313/0x3f0 block/blk-mq-sched.c:124
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1176 [inline]
 __free_pages_ok+0xc60/0xd80 mm/page_alloc.c:1438
 free_the_page mm/page_alloc.c:4917 [inline]
 __free_pages+0x8f/0x250 mm/page_alloc.c:4923
 kfree+0x1ee/0x660 mm/slub.c:4058
 device_release+0x70/0x1a0 drivers/base/core.c:1767
 kobject_cleanup+0x1de/0x3c0 lib/kobject.c:708
 netdev_run_todo+0xc0b/0xda0 net/core/dev.c:9420
 tun_detach drivers/net/tun.c:751 [inline]
 tun_chr_close+0xc0/0xd0 drivers/net/tun.c:3517
 __fput+0x27d/0x6c0 fs/file_table.c:281
 task_work_run+0x186/0x1b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:163 [inline]
 prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Memory state around the buggy address:
 ffff8881e1cf3080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881e1cf3100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881e1cf3180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                              ^
 ffff8881e1cf3200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881e1cf3280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1e8449067 P4D 1e8449067 PUD 19a825067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 19507 Comm: syz-executor.5 Tainted: G    B             5.4.123-syzkaller-00835-g3e256ddba1ff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09cd0 EFLAGS: 00010202
RAX: ffffffff81561868 RBX: 0000000000000101 RCX: ffff8881af1f2f40
RDX: 0000000080000101 RSI: 0000000000000000 RDI: ffff8881e1cf31c0
RBP: ffff8881e1cf31e0 R08: ffffffff8156162d R09: fffffbfff0dc3fd1
R10: fffffbfff0dc3fd1 R11: 0000000000000000 R12: 00000001000031a0
R13: 1ffff1103ede46f1 R14: 0000000000000000 R15: ffff8881e1cf31c0
FS:  00007f70d0e58700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000019cf70000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x30/0x330 kernel/time/timer.c:1416
 expire_timers+0x214/0x410 kernel/time/timer.c:1461
 __run_timers+0x603/0x740 kernel/time/timer.c:1785
 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1798
 __do_softirq+0x23e/0x615 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x195/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:537 [inline]
 smp_apic_timer_interrupt+0x113/0x420 arch/x86/kernel/apic/apic.c:1150
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:831
 </IRQ>
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x4d/0x80 kernel/locking/spinlock.c:191
Code: 74 0c 48 c7 c7 70 d1 ea 85 e8 7f a5 4d fd 48 83 3d a7 73 a4 01 00 74 36 48 89 df e8 fd d7 06 fd 66 90 4c 89 34 24 ff 34 24 9d <bf> 01 00 00 00 e8 49 2d 00 fd 65 8b 05 9e 8f bb 7b 85 c0 74 08 48
RSP: 0018:ffff8881db46f720 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881de7163e4 RCX: dffffc0000000000
RDX: ffffc900018e7000 RSI: 0000000000000246 RDI: ffff8881de7163e4
RBP: ffff8881db46f830 R08: ffffffff82279c9d R09: 0000000000000003
R10: ffffed103b68dec5 R11: 0000000000000004 R12: ffff8881db46f920
R13: ffff8881de7163e4 R14: 0000000000000246 R15: ffff8881a7554280
 spin_unlock_irqrestore include/linux/spinlock.h:393 [inline]
 __skb_try_recv_datagram+0x1c2/0x5b0 net/core/datagram.c:272
 unix_dgram_recvmsg+0x2cb/0x1080 net/unix/af_unix.c:2070
 ____sys_recvmsg+0x1d1/0x440 net/socket.c:2530
 ___sys_recvmsg net/socket.c:2571 [inline]
 do_recvmmsg+0x568/0xb40 net/socket.c:2682
 __sys_recvmmsg net/socket.c:2761 [inline]
 __do_sys_recvmmsg net/socket.c:2784 [inline]
 __se_sys_recvmmsg net/socket.c:2777 [inline]
 __x64_sys_recvmmsg+0x195/0x240 net/socket.c:2777
 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4665d9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f70d0e58188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665d9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 000000000056c038
R13: 00007ffc89434edf R14: 00007f70d0e58300 R15: 0000000000022000
Modules linked in:
CR2: 0000000000000000
---[ end trace 20739b78d5b0e69e ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09cd0 EFLAGS: 00010202
RAX: ffffffff81561868 RBX: 0000000000000101 RCX: ffff8881af1f2f40
RDX: 0000000080000101 RSI: 0000000000000000 RDI: ffff8881e1cf31c0
RBP: ffff8881e1cf31e0 R08: ffffffff8156162d R09: fffffbfff0dc3fd1
R10: fffffbfff0dc3fd1 R11: 0000000000000000 R12: 00000001000031a0
R13: 1ffff1103ede46f1 R14: 0000000000000000 R15: ffff8881e1cf31c0
FS:  00007f70d0e58700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000019cf70000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400