------------[ cut here ]------------ kernel BUG at fs/pipe.c:582! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 9273 Comm: syz-fuzzer Not tainted 5.4.0-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 91 d6 b5 ff 41 83 ce 08 e8 88 d6 b5 ff 44 89 f0 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 71 d6 b5 ff <0f> 0b e8 4a 48 f3 ff e9 ed fc ff ff e8 40 48 f3 ff e9 b3 fd ff ff RSP: 0018:ffffc900020f7a10 EFLAGS: 00010293 RAX: ffff8880a55e4500 RBX: ffff8880962a1800 RCX: ffffffff81bf21ea RDX: 0000000000000000 RSI: ffffffff81bf240f RDI: 0000000000000004 RBP: ffffc900020f7a48 R08: ffff8880a55e4500 R09: fffffbfff1617faf R10: fffffbfff1617fae R11: ffffffff8b0bfd77 R12: ffff8880a348d2c0 R13: 00000000ffffffe0 R14: 0000000000000010 R15: 000000000003854a FS: 000000c420029568(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000160a978 CR3: 000000009ff05000 CR4: 00000000001406e0 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:892 ep_send_events_proc+0x2a3/0xd70 fs/eventpoll.c:1749 ep_scan_ready_list+0x305/0xb20 fs/eventpoll.c:704 ep_send_events fs/eventpoll.c:1793 [inline] ep_poll+0x1f9/0xe60 fs/eventpoll.c:1930 do_epoll_wait+0x210/0x260 fs/eventpoll.c:2294 __do_sys_epoll_wait fs/eventpoll.c:2304 [inline] __se_sys_epoll_wait fs/eventpoll.c:2301 [inline] __x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2301 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45df89 Code: 24 18 b8 e9 00 00 00 0f 05 89 44 24 20 c3 cc cc cc 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 44 8b 54 24 1c b8 e8 00 00 00 0f 05 <89> 44 24 20 c3 cc cc 8b 7c 24 08 48 c7 c6 02 00 00 00 48 c7 c2 01 RSP: 002b:000000c4203bb850 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045df89 RDX: 0000000000000080 RSI: 000000c4203bb890 RDI: 0000000000000004 RBP: 000000c4203bbe90 R08: 0000000000000002 R09: 000000c42a12c648 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 000000c421d31da0 R14: 0000000000000001 R15: 0000000000000000 Modules linked in: ---[ end trace 3f285c1f0380bf63 ]--- RIP: 0010:pipe_poll+0x37f/0x400 fs/pipe.c:582 Code: ff 85 db 75 09 e8 91 d6 b5 ff 41 83 ce 08 e8 88 d6 b5 ff 44 89 f0 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 71 d6 b5 ff <0f> 0b e8 4a 48 f3 ff e9 ed fc ff ff e8 40 48 f3 ff e9 b3 fd ff ff RSP: 0018:ffffc900020f7a10 EFLAGS: 00010293 RAX: ffff8880a55e4500 RBX: ffff8880962a1800 RCX: ffffffff81bf21ea RDX: 0000000000000000 RSI: ffffffff81bf240f RDI: 0000000000000004 RBP: ffffc900020f7a48 R08: ffff8880a55e4500 R09: fffffbfff1617faf R10: fffffbfff1617fae R11: ffffffff8b0bfd77 R12: ffff8880a348d2c0 R13: 00000000ffffffe0 R14: 0000000000000010 R15: 000000000003854a FS: 000000c420029568(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f38ba0c2db8 CR3: 000000009ff05000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400