------------[ cut here ]------------ kernel BUG at mm/slub.c:3934! invalid opcode: 0000 [#1] SMP PTI CPU: 1 PID: 29714 Comm: syz-executor7 Not tainted 4.18.0-rc4+ #27 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kfree+0x1ad4/0x2ac0 mm/slub.c:3934 Code: ff 8b bd 44 ff ff ff e8 8a a1 02 00 45 84 f6 0f 85 ed ec ff ff e9 01 fb ff ff 8b 3a e8 75 a1 02 00 48 85 db 0f 85 96 ed ff ff <0f> 0b eb fe 44 89 ef e8 60 a1 02 00 48 8b bd 68 ff ff ff e9 52 ed RSP: 0018:ffff8800b17df658 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffffffff8ba11000 RSI: 0000000000000001 RDI: ffffea0006000008 RBP: ffff8800b17df7a8 R08: 0000000000000000 R09: 000077ff80000000 R10: 0000000080100007 R11: 0000000080100006 R12: ffffea0006000000 R13: 0000000000000000 R14: 0000000000000000 R15: dead0000000000ff FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7624fe7db8 CR3: 00000000a4d66000 CR4: 00000000001406e0 DR0: 0000000020000040 DR1: 0000000020000040 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: free_pipe_info+0x447/0x460 fs/pipe.c:684 do_exit+0x30cb/0x3930 kernel/exit.c:909 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 syscall_return_slowpath+0x108/0x800 arch/x86/entry/common.c:268 do_syscall_64+0x1ad/0x230 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x455ab9 Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fd128314c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffa2 RBX: 00007fd1283156d4 RCX: 0000000000455ab9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c1c6c R14: 00000000004d3438 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace d97ea86b0c3c3cfc ]--- RIP: 0010:kfree+0x1ad4/0x2ac0 mm/slub.c:3934 Code: ff 8b bd 44 ff ff ff e8 8a a1 02 00 45 84 f6 0f 85 ed ec ff ff e9 01 fb ff ff 8b 3a e8 75 a1 02 00 48 85 db 0f 85 96 ed ff ff <0f> 0b eb fe 44 89 ef e8 60 a1 02 00 48 8b bd 68 ff ff ff e9 52 ed RSP: 0018:ffff8800b17df658 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffffffff8ba11000 RSI: 0000000000000001 RDI: ffffea0006000008 RBP: ffff8800b17df7a8 R08: 0000000000000000 R09: 000077ff80000000 R10: 0000000080100007 R11: 0000000080100006 R12: ffffea0006000000 R13: 0000000000000000 R14: 0000000000000000 R15: dead0000000000ff FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7624fe7db8 CR3: 000000000b030000 CR4: 00000000001406e0 DR0: 0000000020000040 DR1: 0000000020000040 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600