BUG: unable to handle kernel paging request at 00000000075d4d08
PGD 80000001a9a61067 P4D 80000001a9a61067 PUD 1a9a64067 PMD 0 
Oops: 0000 [#1] SMP PTI
CPU: 0 PID: 7011 Comm: syz-executor5 Not tainted 4.18.0-rc4+ #27
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:197 [inline]
RIP: 0010:compound_head include/linux/page-flags.h:142 [inline]
RIP: 0010:PageSwapCache include/linux/page-flags.h:338 [inline]
RIP: 0010:free_swap_cache mm/swap_state.c:290 [inline]
RIP: 0010:free_pages_and_swap_cache+0x11f/0x5b0 mm/swap_state.c:318
Code: ff 4c 8b 38 48 89 85 58 ff ff ff 48 89 c7 e8 28 22 0d 00 4c 8b 20 44 8b 32 49 8d 5f 08 4d 85 e4 0f 85 08 02 00 00 44 89 75 c8 <4d> 8b 77 08 48 89 9d 60 ff ff ff 48 89 df e8 fe 21 0d 00 4c 8b 28 
RSP: 0018:ffff88012681f618 EFLAGS: 00010246
RAX: ffff88012286ef90 RBX: 00000000075d4d08 RCX: ffff88012286af90
RDX: ffff88012286af90 RSI: aaaaaaaaaaaab000 RDI: ffffea0006cf29a0
RBP: ffff88012681f6c0 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000008 R12: 0000000000000000
R13: 00000000000001f1 R14: 00000000876000bf R15: 00000000075d4d00
FS:  00007fbab15d5700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000075d4d08 CR3: 00000001a13a2000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 tlb_flush_mmu_free mm/memory.c:260 [inline]
 tlb_flush_mmu mm/memory.c:269 [inline]
 arch_tlb_finish_mmu mm/memory.c:284 [inline]
 tlb_finish_mmu+0x290/0x5c0 mm/memory.c:434
 exit_mmap+0x5d2/0xad0 mm/mmap.c:3107
 __mmput+0x165/0x620 kernel/fork.c:971
 mmput+0xbb/0x110 kernel/fork.c:992
 exit_mm+0x6bb/0x7c0 kernel/exit.c:545
 do_exit+0xc12/0x3930 kernel/exit.c:854
 do_group_exit+0x1a0/0x360 kernel/exit.c:970
 get_signal+0x15c3/0x2190 kernel/signal.c:2468
 do_signal+0xca/0x2060 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop arch/x86/entry/common.c:162 [inline]
 prepare_exit_to_usermode+0x297/0x430 arch/x86/entry/common.c:197
 retint_user+0x8/0x8
RIP: 0033:          (null)
Code: Bad RIP value.
RSP: 002b:0000000020000508 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fbab15d56d4 RCX: 0000000000455ab9
RDX: 0000000020000100 RSI: 0000000020000500 RDI: 0000000000000000
RBP: 000000000072bea0 R08: 0000000020000480 R09: 0000000000000000
R10: 0000000020000300 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bb85d R14: 00000000004c8d28 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: 00000000075d4d08
---[ end trace 6f919d9111941fb2 ]---
RIP: 0010:__read_once_size include/linux/compiler.h:197 [inline]
RIP: 0010:compound_head include/linux/page-flags.h:142 [inline]
RIP: 0010:PageSwapCache include/linux/page-flags.h:338 [inline]
RIP: 0010:free_swap_cache mm/swap_state.c:290 [inline]
RIP: 0010:free_pages_and_swap_cache+0x11f/0x5b0 mm/swap_state.c:318
Code: ff 4c 8b 38 48 89 85 58 ff ff ff 48 89 c7 e8 28 22 0d 00 4c 8b 20 44 8b 32 49 8d 5f 08 4d 85 e4 0f 85 08 02 00 00 44 89 75 c8 <4d> 8b 77 08 48 89 9d 60 ff ff ff 48 89 df e8 fe 21 0d 00 4c 8b 28 
RSP: 0018:ffff88012681f618 EFLAGS: 00010246
RAX: ffff88012286ef90 RBX: 00000000075d4d08 RCX: ffff88012286af90
RDX: ffff88012286af90 RSI: aaaaaaaaaaaab000 RDI: ffffea0006cf29a0
RBP: ffff88012681f6c0 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000008 R12: 0000000000000000
R13: 00000000000001f1 R14: 00000000876000bf R15: 00000000075d4d00
FS:  00007fbab15d5700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001a13a2000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600