raw: 0000000000000000 0000000000000000 00000000ffffff7f 0000000000000000
page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:547!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 21320 Comm: syz-executor.5 Not tainted 5.1.0-rc6+ #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:put_page_testzero include/linux/mm.h:547 [inline]
RIP: 0010:put_page_testzero include/linux/mm.h:545 [inline]
RIP: 0010:io_mem_free+0x12d/0x150 fs/io_uring.c:2325
Code: ff 5b 41 5c 41 5d 5d c3 e8 80 a1 a8 ff 4d 8d 65 ff e9 53 ff ff ff e8 72 a1 a8 ff 48 c7 c6 c0 fe 75 87 4c 89 e7 e8 33 10 d2 ff <0f> 0b 48 89 df e8 49 b7 e0 ff e9 71 ff ff ff e8 5f b7 e0 ff e9 08
RSP: 0018:ffff88805b6e7d70 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffffea00025cc3f4 RCX: ffffc9001088c000
RDX: 0000000000040000 RSI: ffffffff819a0c42 RDI: ffffea00025cc3f8
RBP: ffff88805b6e7d88 R08: 000000000000003e R09: ffffed1015d05011
R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00025cc3c0
R13: 0000000000000000 R14: ffff8880a0edc140 R15: fffffffffffffff4
FS:  00007f312598f700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001c68e80 CR3: 00000000a60d6000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 io_ring_ctx_free fs/io_uring.c:2557 [inline]
 io_ring_ctx_wait_and_kill+0x290/0x510 fs/io_uring.c:2601
 io_uring_create fs/io_uring.c:2888 [inline]
 io_uring_setup+0x1305/0x1ac0 fs/io_uring.c:2914
 __do_sys_io_uring_setup fs/io_uring.c:2927 [inline]
 __se_sys_io_uring_setup fs/io_uring.c:2924 [inline]
 __x64_sys_io_uring_setup+0x54/0x80 fs/io_uring.c:2924
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458da9
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f312598ec78 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 00007f312598ec90 RCX: 0000000000458da9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000197
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f312598f6d4
R13: 00000000004bffde R14: 00000000004d2318 R15: 0000000000000004
Modules linked in:
---[ end trace 536b68c0e7396ec6 ]---
RIP: 0010:put_page_testzero include/linux/mm.h:547 [inline]
RIP: 0010:put_page_testzero include/linux/mm.h:545 [inline]
RIP: 0010:io_mem_free+0x12d/0x150 fs/io_uring.c:2325
Code: ff 5b 41 5c 41 5d 5d c3 e8 80 a1 a8 ff 4d 8d 65 ff e9 53 ff ff ff e8 72 a1 a8 ff 48 c7 c6 c0 fe 75 87 4c 89 e7 e8 33 10 d2 ff <0f> 0b 48 89 df e8 49 b7 e0 ff e9 71 ff ff ff e8 5f b7 e0 ff e9 08
RSP: 0018:ffff88805b6e7d70 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffffea00025cc3f4 RCX: ffffc9001088c000
RDX: 0000000000040000 RSI: ffffffff819a0c42 RDI: ffffea00025cc3f8
RBP: ffff88805b6e7d88 R08: 000000000000003e R09: ffffed1015d05011
R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00025cc3c0
R13: 0000000000000000 R14: ffff8880a0edc140 R15: fffffffffffffff4
FS:  00007f312598f700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000140e030 CR3: 00000000a60d6000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600