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BUG: KASAN: double-free or invalid-free in slab_free mm/slub.c:3157 [inline]
BUG: KASAN: double-free or invalid-free in kfree+0xdb/0x3c0 mm/slub.c:4156

CPU: 0 PID: 15321 Comm: modprobe Not tainted 5.10.0-next-20201223-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:230
 kasan_report_invalid_free+0x51/0x80 mm/kasan/report.c:355
 ____kasan_slab_free.part.0+0xfd/0x110 mm/kasan/common.c:344
 kasan_slab_free include/linux/kasan.h:188 [inline]
 slab_free_hook mm/slub.c:1548 [inline]
 slab_free_freelist_hook+0x82/0x1d0 mm/slub.c:1586
 slab_free mm/slub.c:3157 [inline]
 kfree+0xdb/0x3c0 mm/slub.c:4156
 bdev_free_inode+0x57/0x80 fs/block_dev.c:787
 i_callback+0x3f/0x70 fs/inode.c:222
 rcu_do_batch kernel/rcu/tree.c:2489 [inline]
 rcu_core+0x75d/0xf80 kernel/rcu/tree.c:2723
 __do_softirq+0x2bc/0xa77 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:226 [inline]
 __irq_exit_rcu+0x17f/0x200 kernel/softirq.c:420
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:432
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:compound_head include/linux/page-flags.h:186 [inline]
RIP: 0010:PageUptodate include/linux/page-flags.h:515 [inline]
RIP: 0010:filemap_map_pages+0xd81/0x1110 mm/filemap.c:3075
Code: dc ff 4c 89 e8 48 c1 e8 03 80 3c 18 00 0f 85 74 02 00 00 4c 8b 7d 08 31 ff 49 89 ee 4c 89 f8 83 e0 01 48 89 c6 48 89 44 24 58 <e8> aa d8 dc ff 48 8b 44 24 58 48 85 c0 0f 85 c5 01 00 00 e8 a7 d0
RSP: 0000:ffffc90001fefc30 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888024103600 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffea0002e72e00 R08: 0000000000000001 R09: 0000000002e72e00
R10: ffffffff819678d6 R11: 0000000000000000 R12: 0000000000000165
R13: ffffea0002e72e08 R14: ffffea0002e72e00 R15: ffffea0002e72dc8
 do_fault_around mm/memory.c:3980 [inline]
 do_read_fault mm/memory.c:4014 [inline]
 do_fault mm/memory.c:4147 [inline]
 handle_pte_fault mm/memory.c:4387 [inline]
 __handle_mm_fault mm/memory.c:4522 [inline]
 handle_mm_fault+0x3bc5/0x5760 mm/memory.c:4620
 do_user_addr_fault+0x458/0xc60 arch/x86/mm/fault.c:1398
 handle_page_fault arch/x86/mm/fault.c:1455 [inline]
 exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1511
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:580
RIP: 0033:0x7f8f99be283b
Code: 03 ba 5f 00 00 00 48 89 04 24 b8 a8 e3 50 00 48 c1 e0 04 48 83 c1 01 48 01 d0 48 89 c2 48 c1 ea 18 81 e2 f0 00 00 00 48 31 d0 <0f> b6 11 84 d2 75 de 25 ff ff ff 0f 48 3d f6 75 ae 03 75 2b 48 8d
RSP: 002b:00007ffe377e8770 EFLAGS: 00010202
RAX: 00000000050e3adf RBX: 00007f8f99b597a8 RCX: 00007f8f99c9b50e
RDX: 0000000000000000 RSI: 0000000000000025 RDI: 00007f8f99b59850
RBP: 00007ffe377e88c0 R08: 00007f8f99b3fea8 R09: 00007f8f99b3fea8
R10: 00007f8f99ed46f0 R11: 0000000000000000 R12: 00007f8f9a0f6000
R13: 00007f8f99b59838 R14: 00007f8f99b3a000 R15: 0000000000399070

Allocated by task 4915:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:404 [inline]
 ____kasan_kmalloc mm/kasan/common.c:435 [inline]
 ____kasan_kmalloc.constprop.0+0xa0/0xd0 mm/kasan/common.c:407
 kasan_slab_alloc include/linux/kasan.h:205 [inline]
 slab_post_alloc_hook mm/slab.h:518 [inline]
 slab_alloc_node mm/slub.c:2903 [inline]
 slab_alloc mm/slub.c:2911 [inline]
 __kmalloc_track_caller+0x163/0x2e0 mm/slub.c:4496
 kmemdup+0x23/0x50 mm/util.c:128
 kmemdup include/linux/string.h:520 [inline]
 add_partition+0x3a7/0x960 block/partitions/core.c:368
 blk_add_partition block/partitions/core.c:598 [inline]
 blk_add_partitions+0xacf/0xf60 block/partitions/core.c:674
 bdev_disk_changed+0x1fd/0x410 fs/block_dev.c:1249
 blkdev_reread_part block/ioctl.c:94 [inline]
 blkdev_common_ioctl+0x129c/0x16a0 block/ioctl.c:501
 blkdev_ioctl+0x1ef/0x6c0 block/ioctl.c:570
 block_ioctl+0xf9/0x140 fs/block_dev.c:1648
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff888012ab0200
 which belongs to the cache kmalloc-128 of size 128
The buggy address is located 0 bytes inside of
 128-byte region [ffff888012ab0200, ffff888012ab0280)
The buggy address belongs to the page:
page:00000000b18be980 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888012ab0200 pfn:0x12ab0
flags: 0xfff00000000200(slab)
raw: 00fff00000000200 ffffea0000c0f1c8 ffffea0000a78048 ffff888010841640
raw: ffff888012ab0200 000000000010000f 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888012ab0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888012ab0180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888012ab0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888012ab0280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888012ab0300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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