BUG: Bad page state in process syz-executor.2  pfn:1c5aa7
page:ffffea000716a9c0 count:0 mapcount:1 mapping:          (null) index:0x20ca8
flags: 0x4000000000040008(uptodate|swapbacked)
page dumped because: nonzero mapcount
Modules linked in:
CPU: 1 PID: 22461 Comm: syz-executor.2 Not tainted 4.9.141+ #1
 ffff8800ada77208 ffffffff81b42e79 1ffff10015b4ee43 ffffea000716a9c0
 1ffffffff0601200 ffff8800ada77278 ffffffff82a96960 ffff8800ada772a0
 ffffffff814fc6eb 0000000041b58ab3 ffffffff82e358ba ffffffff8141d2e0
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff814fc6eb>] bad_page.cold.29+0xc6/0x107 mm/page_alloc.c:582
 [<ffffffff8141d513>] free_pages_check_bad+0xe3/0x150 mm/page_alloc.c:962
 [<ffffffff81424956>] free_pages_check mm/page_alloc.c:971 [inline]
 [<ffffffff81424956>] free_pages_prepare mm/page_alloc.c:1062 [inline]
 [<ffffffff81424956>] free_pcp_prepare mm/page_alloc.c:1087 [inline]
 [<ffffffff81424956>] free_hot_cold_page+0x6a6/0x9d0 mm/page_alloc.c:2473
 [<ffffffff8143b98b>] __put_single_page mm/swap.c:78 [inline]
 [<ffffffff8143b98b>] __put_page+0x6b/0xa0 mm/swap.c:102
 [<ffffffff815cf793>] put_page include/linux/mm.h:785 [inline]
 [<ffffffff815cf793>] dio_cleanup fs/direct-io.c:433 [inline]
 [<ffffffff815cf793>] do_blockdev_direct_IO fs/direct-io.c:1276 [inline]
 [<ffffffff815cf793>] __blockdev_direct_IO+0x1b03/0xbd10 fs/direct-io.c:1360
 [<ffffffff816de318>] ext4_direct_IO_write fs/ext4/inode.c:3507 [inline]
 [<ffffffff816de318>] ext4_direct_IO+0x978/0x29c0 fs/ext4/inode.c:3663
 [<ffffffff81411f64>] generic_file_direct_write+0x284/0x510 mm/filemap.c:2655
 [<ffffffff8141240f>] __generic_file_write_iter+0x21f/0x540 mm/filemap.c:2835
 [<ffffffff816b328d>] ext4_file_write_iter+0x63d/0xd70 fs/ext4/file.c:165
 [<ffffffff815071c7>] vfs_iter_write+0x2d7/0x450 fs/read_write.c:390
 [<ffffffff815ae4fb>] iter_file_splice_write+0x5fb/0xb30 fs/splice.c:768
 [<ffffffff815b066d>] do_splice_from fs/splice.c:870 [inline]
 [<ffffffff815b066d>] do_splice fs/splice.c:1166 [inline]
 [<ffffffff815b066d>] SYSC_splice fs/splice.c:1416 [inline]
 [<ffffffff815b066d>] SyS_splice+0xe4d/0x14d0 fs/splice.c:1399
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
BUG: Bad page state in process syz-executor.2  pfn:178bea
page:ffffea0005e2fa80 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000080(slab)
page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
bad because of flags: 0x80(slab)
Modules linked in:
CPU: 1 PID: 22461 Comm: syz-executor.2 Tainted: G    B           4.9.141+ #1
 ffff8800ada77208 ffffffff81b42e79 1ffff10015b4ee43 ffffea0005e2fa80
 ffffea0005e2fa80 ffff8800ada77278 ffffffff82a96a20 ffff8800ada772a0
 ffffffff814fc6eb 0000000041b58ab3 ffffffff82e358ba ffffffff8141d2e0
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff814fc6eb>] bad_page.cold.29+0xc6/0x107 mm/page_alloc.c:582
 [<ffffffff8141d52e>] free_pages_check_bad+0xfe/0x150 mm/page_alloc.c:962
 [<ffffffff81424956>] free_pages_check mm/page_alloc.c:971 [inline]
 [<ffffffff81424956>] free_pages_prepare mm/page_alloc.c:1062 [inline]
 [<ffffffff81424956>] free_pcp_prepare mm/page_alloc.c:1087 [inline]
 [<ffffffff81424956>] free_hot_cold_page+0x6a6/0x9d0 mm/page_alloc.c:2473
 [<ffffffff8143b98b>] __put_single_page mm/swap.c:78 [inline]
 [<ffffffff8143b98b>] __put_page+0x6b/0xa0 mm/swap.c:102
 [<ffffffff815cf793>] put_page include/linux/mm.h:785 [inline]
 [<ffffffff815cf793>] dio_cleanup fs/direct-io.c:433 [inline]
 [<ffffffff815cf793>] do_blockdev_direct_IO fs/direct-io.c:1276 [inline]
 [<ffffffff815cf793>] __blockdev_direct_IO+0x1b03/0xbd10 fs/direct-io.c:1360
 [<ffffffff816de318>] ext4_direct_IO_write fs/ext4/inode.c:3507 [inline]
 [<ffffffff816de318>] ext4_direct_IO+0x978/0x29c0 fs/ext4/inode.c:3663
 [<ffffffff81411f64>] generic_file_direct_write+0x284/0x510 mm/filemap.c:2655
 [<ffffffff8141240f>] __generic_file_write_iter+0x21f/0x540 mm/filemap.c:2835
 [<ffffffff816b328d>] ext4_file_write_iter+0x63d/0xd70 fs/ext4/file.c:165
 [<ffffffff815071c7>] vfs_iter_write+0x2d7/0x450 fs/read_write.c:390
 [<ffffffff815ae4fb>] iter_file_splice_write+0x5fb/0xb30 fs/splice.c:768
 [<ffffffff815b066d>] do_splice_from fs/splice.c:870 [inline]
 [<ffffffff815b066d>] do_splice fs/splice.c:1166 [inline]
 [<ffffffff815b066d>] SYSC_splice fs/splice.c:1416 [inline]
 [<ffffffff815b066d>] SyS_splice+0xe4d/0x14d0 fs/splice.c:1399
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
BUG: Bad page state in process syz-executor.2  pfn:1c9079
page:ffffea0007241e40 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000080(slab)
page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
bad because of flags: 0x80(slab)
Modules linked in:
CPU: 1 PID: 22461 Comm: syz-executor.2 Tainted: G    B           4.9.141+ #1
 ffff8800ada77208 ffffffff81b42e79 1ffff10015b4ee43 ffffea0007241e40
 ffffea0007241e40 ffff8800ada77278 ffffffff82a96a20 ffff8800ada772a0
 ffffffff814fc6eb 0000000041b58ab3 ffffffff82e358ba ffffffff8141d2e0
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff814fc6eb>] bad_page.cold.29+0xc6/0x107 mm/page_alloc.c:582
 [<ffffffff8141d52e>] free_pages_check_bad+0xfe/0x150 mm/page_alloc.c:962
 [<ffffffff81424956>] free_pages_check mm/page_alloc.c:971 [inline]
 [<ffffffff81424956>] free_pages_prepare mm/page_alloc.c:1062 [inline]
 [<ffffffff81424956>] free_pcp_prepare mm/page_alloc.c:1087 [inline]
 [<ffffffff81424956>] free_hot_cold_page+0x6a6/0x9d0 mm/page_alloc.c:2473
 [<ffffffff8143b98b>] __put_single_page mm/swap.c:78 [inline]
 [<ffffffff8143b98b>] __put_page+0x6b/0xa0 mm/swap.c:102
 [<ffffffff815cf793>] put_page include/linux/mm.h:785 [inline]
 [<ffffffff815cf793>] dio_cleanup fs/direct-io.c:433 [inline]
 [<ffffffff815cf793>] do_blockdev_direct_IO fs/direct-io.c:1276 [inline]
 [<ffffffff815cf793>] __blockdev_direct_IO+0x1b03/0xbd10 fs/direct-io.c:1360
 [<ffffffff816de318>] ext4_direct_IO_write fs/ext4/inode.c:3507 [inline]
 [<ffffffff816de318>] ext4_direct_IO+0x978/0x29c0 fs/ext4/inode.c:3663
 [<ffffffff81411f64>] generic_file_direct_write+0x284/0x510 mm/filemap.c:2655
 [<ffffffff8141240f>] __generic_file_write_iter+0x21f/0x540 mm/filemap.c:2835
 [<ffffffff816b328d>] ext4_file_write_iter+0x63d/0xd70 fs/ext4/file.c:165
 [<ffffffff815071c7>] vfs_iter_write+0x2d7/0x450 fs/read_write.c:390
 [<ffffffff815ae4fb>] iter_file_splice_write+0x5fb/0xb30 fs/splice.c:768
 [<ffffffff815b066d>] do_splice_from fs/splice.c:870 [inline]
 [<ffffffff815b066d>] do_splice fs/splice.c:1166 [inline]
 [<ffffffff815b066d>] SYSC_splice fs/splice.c:1416 [inline]
 [<ffffffff815b066d>] SyS_splice+0xe4d/0x14d0 fs/splice.c:1399
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
BUG: Bad page state in process syz-executor.2  pfn:1c6ff5
page:ffffea00071bfd40 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000080(slab)
page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
bad because of flags: 0x80(slab)
Modules linked in:
CPU: 1 PID: 22461 Comm: syz-executor.2 Tainted: G    B           4.9.141+ #1
 ffff8800ada77208 ffffffff81b42e79 1ffff10015b4ee43 ffffea00071bfd40
 ffffea00071bfd40 ffff8800ada77278 ffffffff82a96a20 ffff8800ada772a0
 ffffffff814fc6eb 0000000041b58ab3 ffffffff82e358ba ffffffff8141d2e0
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff814fc6eb>] bad_page.cold.29+0xc6/0x107 mm/page_alloc.c:582
 [<ffffffff8141d52e>] free_pages_check_bad+0xfe/0x150 mm/page_alloc.c:962
 [<ffffffff81424956>] free_pages_check mm/page_alloc.c:971 [inline]
 [<ffffffff81424956>] free_pages_prepare mm/page_alloc.c:1062 [inline]
 [<ffffffff81424956>] free_pcp_prepare mm/page_alloc.c:1087 [inline]
 [<ffffffff81424956>] free_hot_cold_page+0x6a6/0x9d0 mm/page_alloc.c:2473
 [<ffffffff8143b98b>] __put_single_page mm/swap.c:78 [inline]
 [<ffffffff8143b98b>] __put_page+0x6b/0xa0 mm/swap.c:102
 [<ffffffff815cf793>] put_page include/linux/mm.h:785 [inline]
 [<ffffffff815cf793>] dio_cleanup fs/direct-io.c:433 [inline]
 [<ffffffff815cf793>] do_blockdev_direct_IO fs/direct-io.c:1276 [inline]
 [<ffffffff815cf793>] __blockdev_direct_IO+0x1b03/0xbd10 fs/direct-io.c:1360
 [<ffffffff816de318>] ext4_direct_IO_write fs/ext4/inode.c:3507 [inline]
 [<ffffffff816de318>] ext4_direct_IO+0x978/0x29c0 fs/ext4/inode.c:3663
 [<ffffffff81411f64>] generic_file_direct_write+0x284/0x510 mm/filemap.c:2655
 [<ffffffff8141240f>] __generic_file_write_iter+0x21f/0x540 mm/filemap.c:2835
 [<ffffffff816b328d>] ext4_file_write_iter+0x63d/0xd70 fs/ext4/file.c:165
 [<ffffffff815071c7>] vfs_iter_write+0x2d7/0x450 fs/read_write.c:390
 [<ffffffff815ae4fb>] iter_file_splice_write+0x5fb/0xb30 fs/splice.c:768
 [<ffffffff815b066d>] do_splice_from fs/splice.c:870 [inline]
 [<ffffffff815b066d>] do_splice fs/splice.c:1166 [inline]
 [<ffffffff815b066d>] SYSC_splice fs/splice.c:1416 [inline]
 [<ffffffff815b066d>] SyS_splice+0xe4d/0x14d0 fs/splice.c:1399
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
BUG: Bad page state in process syz-executor.2  pfn:1a363a
page:ffffea00068d8e80 count:0 mapcount:1 mapping:          (null) index:0x20044
flags: 0x4000000000040008(uptodate|swapbacked)
page dumped because: nonzero mapcount
Modules linked in:
CPU: 1 PID: 22461 Comm: syz-executor.2 Tainted: G    B           4.9.141+ #1
 ffff8800ada77208 ffffffff81b42e79 1ffff10015b4ee43 ffffea00068d8e80
 ffffea00068d8e80 ffff8800ada77278 ffffffff82a96960 ffff8800ada772a0
 ffffffff814fc6eb 0000000041b58ab3 ffffffff82e358ba ffffffff8141d2e0
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff814fc6eb>] bad_page.cold.29+0xc6/0x107 mm/page_alloc.c:582
 [<ffffffff8141d513>] free_pages_check_bad+0xe3/0x150 mm/page_alloc.c:962
 [<ffffffff81424956>] free_pages_check mm/page_alloc.c:971 [inline]
 [<ffffffff81424956>] free_pages_prepare mm/page_alloc.c:1062 [inline]
 [<ffffffff81424956>] free_pcp_prepare mm/page_alloc.c:1087 [inline]
 [<ffffffff81424956>] free_hot_cold_page+0x6a6/0x9d0 mm/page_alloc.c:2473
 [<ffffffff8143b98b>] __put_single_page mm/swap.c:78 [inline]
 [<ffffffff8143b98b>] __put_page+0x6b/0xa0 mm/swap.c:102
 [<ffffffff815cf793>] put_page include/linux/mm.h:785 [inline]
 [<ffffffff815cf793>] dio_cleanup fs/direct-io.c:433 [inline]
 [<ffffffff815cf793>] do_blockdev_direct_IO fs/direct-io.c:1276 [inline]
 [<ffffffff815cf793>] __blockdev_direct_IO+0x1b03/0xbd10 fs/direct-io.c:1360
 [<ffffffff816de318>] ext4_direct_IO_write fs/ext4/inode.c:3507 [inline]
 [<ffffffff816de318>] ext4_direct_IO+0x978/0x29c0 fs/ext4/inode.c:3663
 [<ffffffff81411f64>] generic_file_direct_write+0x284/0x510 mm/filemap.c:2655
 [<ffffffff8141240f>] __generic_file_write_iter+0x21f/0x540 mm/filemap.c:2835
 [<ffffffff816b328d>] ext4_file_write_iter+0x63d/0xd70 fs/ext4/file.c:165
 [<ffffffff815071c7>] vfs_iter_write+0x2d7/0x450 fs/read_write.c:390
 [<ffffffff815ae4fb>] iter_file_splice_write+0x5fb/0xb30 fs/splice.c:768
 [<ffffffff815b066d>] do_splice_from fs/splice.c:870 [inline]
 [<ffffffff815b066d>] do_splice fs/splice.c:1166 [inline]
 [<ffffffff815b066d>] SYSC_splice fs/splice.c:1416 [inline]
 [<ffffffff815b066d>] SyS_splice+0xe4d/0x14d0 fs/splice.c:1399
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
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
Modules linked in:
CPU: 0 PID: 22518 Comm: syz-executor.2 Tainted: G    B           4.9.141+ #1
task: ffff8801a50e2f80 task.stack: ffff8800b87b8000
RIP: 0010:[<ffffffff815cf7b0>]  [<ffffffff815cf7b0>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff815cf7b0>]  [<ffffffff815cf7b0>] compound_head include/linux/page-flags.h:143 [inline]
RIP: 0010:[<ffffffff815cf7b0>]  [<ffffffff815cf7b0>] get_page include/linux/mm.h:768 [inline]
RIP: 0010:[<ffffffff815cf7b0>]  [<ffffffff815cf7b0>] submit_page_section fs/direct-io.c:825 [inline]
RIP: 0010:[<ffffffff815cf7b0>]  [<ffffffff815cf7b0>] do_direct_IO fs/direct-io.c:1045 [inline]
RIP: 0010:[<ffffffff815cf7b0>]  [<ffffffff815cf7b0>] do_blockdev_direct_IO fs/direct-io.c:1274 [inline]
RIP: 0010:[<ffffffff815cf7b0>]  [<ffffffff815cf7b0>] __blockdev_direct_IO+0x1b20/0xbd10 fs/direct-io.c:1360
RSP: 0018:ffff8800b87bf340  EFLAGS: 00010202
RAX: 0000000000000004 RBX: dffffc0000000000 RCX: ffffc90004b98000
RDX: 00000000000003bf RSI: ffffffff815cf79d RDI: 0000000000000020
RBP: ffff8800b87bf660 R08: ffffed00155f230e R09: ffff8800aaf91800
R10: ffffed00155f230d R11: ffff8800aaf9186f R12: 0000000000000000
R13: ffffea0002cc0c1c R14: ffffea0002cc0c00 R15: ffff8801d637ea40
FS:  00007f47bc4db700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000070f07b CR3: 00000000b1d07000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffff8800b87bf380 fffffbfff0604a02 ffff8800b87bf450 ffff8801d637ead8
 0005080000000000 0000000000001000 0000000000030420 ffff8801d637eab9
 ffff8800b87bf550 ffffffff00000000 ffff8800b87bf4b0 0000000000000fff
Call Trace:
 [<ffffffff816de318>] ext4_direct_IO_write fs/ext4/inode.c:3507 [inline]
 [<ffffffff816de318>] ext4_direct_IO+0x978/0x29c0 fs/ext4/inode.c:3663
 [<ffffffff81411f64>] generic_file_direct_write+0x284/0x510 mm/filemap.c:2655
 [<ffffffff8141240f>] __generic_file_write_iter+0x21f/0x540 mm/filemap.c:2835
 [<ffffffff816b328d>] ext4_file_write_iter+0x63d/0xd70 fs/ext4/file.c:165
 [<ffffffff815071c7>] vfs_iter_write+0x2d7/0x450 fs/read_write.c:390
 [<ffffffff815ae4fb>] iter_file_splice_write+0x5fb/0xb30 fs/splice.c:768
 [<ffffffff815b066d>] do_splice_from fs/splice.c:870 [inline]
 [<ffffffff815b066d>] do_splice fs/splice.c:1166 [inline]
 [<ffffffff815b066d>] SYSC_splice fs/splice.c:1416 [inline]
 [<ffffffff815b066d>] SyS_splice+0xe4d/0x14d0 fs/splice.c:1399
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: ff e8 d5 c2 d4 ff 4c 89 ef e8 8d c1 e6 ff e9 39 ff ff ff e8 c3 c2 d4 ff 48 8b 84 24 c8 00 00 00 48 8d 78 20 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 06 83 00 00 48 8b 84 24 c8 00 00 00 4c 8b 68 
RIP  [<ffffffff815cf7b0>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff815cf7b0>] compound_head include/linux/page-flags.h:143 [inline]
RIP  [<ffffffff815cf7b0>] get_page include/linux/mm.h:768 [inline]
RIP  [<ffffffff815cf7b0>] submit_page_section fs/direct-io.c:825 [inline]
RIP  [<ffffffff815cf7b0>] do_direct_IO fs/direct-io.c:1045 [inline]
RIP  [<ffffffff815cf7b0>] do_blockdev_direct_IO fs/direct-io.c:1274 [inline]
RIP  [<ffffffff815cf7b0>] __blockdev_direct_IO+0x1b20/0xbd10 fs/direct-io.c:1360
 RSP <ffff8800b87bf340>
---[ end trace 51c820559509e369 ]---