------------[ cut here ]------------
kernel BUG at fs/pipe.c:582!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 18674 Comm: syz-executor.2 Not tainted 5.4.0-next-20191204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:pipe_poll+0x37f/0x400 fs/pipe.c:582
Code: ff 85 db 75 09 e8 e1 b2 b5 ff 41 83 ce 08 e8 d8 b2 b5 ff 44 89 f0 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c1 b2 b5 ff <0f> 0b e8 2a 55 f3 ff e9 ed fc ff ff e8 20 55 f3 ff e9 b3 fd ff ff
RSP: 0018:ffffc90007eef398 EFLAGS: 00010216
RAX: 0000000000040000 RBX: ffff88809fb36800 RCX: ffffc900030f1000
RDX: 000000000003f61e RSI: ffffffff81bf451f RDI: 0000000000000004
RBP: ffffc90007eef3d0 R08: ffff888058fce5c0 R09: fffffbfff16597af
R10: fffffbfff16597ae R11: ffffffff8b2cbd77 R12: ffff8880930e8580
R13: 00000000fffffff0 R14: 0000000000000010 R15: 0000000000000880
FS:  00007fa5514a0700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004c00d3 CR3: 0000000091f8c000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vfs_poll include/linux/poll.h:90 [inline]
 ep_item_poll.isra.0+0x15c/0x400 fs/eventpoll.c:871
 ep_read_events_proc+0x228/0x4e0 fs/eventpoll.c:893
 ep_scan_ready_list+0x2fb/0x9e0 fs/eventpoll.c:698
 ep_eventpoll_poll+0x13a/0x190 fs/eventpoll.c:921
 vfs_poll include/linux/poll.h:90 [inline]
 do_select+0x922/0x16f0 fs/select.c:534
 core_sys_select+0x444/0x9e0 fs/select.c:677
 do_pselect.constprop.0+0x199/0x1e0 fs/select.c:759
 __do_sys_pselect6 fs/select.c:784 [inline]
 __se_sys_pselect6 fs/select.c:769 [inline]
 __x64_sys_pselect6+0x1fc/0x2e0 fs/select.c:769
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a679
Code: ad b6 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 b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa55149fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000010e
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000045a679
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000040
RBP: 000000000075bfc8 R08: 0000000020000200 R09: 0000000000000000
R10: 0000000020000140 R11: 0000000000000246 R12: 00007fa5514a06d4
R13: 00000000004c89d4 R14: 00000000004dffe8 R15: 00000000ffffffff
Modules linked in:
---[ end trace 3961da29f5fd325d ]---
RIP: 0010:pipe_poll+0x37f/0x400 fs/pipe.c:582
Code: ff 85 db 75 09 e8 e1 b2 b5 ff 41 83 ce 08 e8 d8 b2 b5 ff 44 89 f0 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c1 b2 b5 ff <0f> 0b e8 2a 55 f3 ff e9 ed fc ff ff e8 20 55 f3 ff e9 b3 fd ff ff
RSP: 0018:ffffc90007eef398 EFLAGS: 00010216
RAX: 0000000000040000 RBX: ffff88809fb36800 RCX: ffffc900030f1000
RDX: 000000000003f61e RSI: ffffffff81bf451f RDI: 0000000000000004
RBP: ffffc90007eef3d0 R08: ffff888058fce5c0 R09: fffffbfff16597af
R10: fffffbfff16597ae R11: ffffffff8b2cbd77 R12: ffff8880930e8580
R13: 00000000fffffff0 R14: 0000000000000010 R15: 0000000000000880
FS:  00007fa5514a0700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200034c0 CR3: 0000000091f8c000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400