linux-kernel - Re: [syzbot] [block?] general protection fault in blk_mq_free_tags

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Message-ID: <68d1e1d6.a70a0220.1b52b.0007.GAE@google.com>
Date: Mon, 22 Sep 2025 16:55:02 -0700
From: syzbot <syzbot+5c5d41e80248d610221f@...kaller.appspotmail.com>
To: hdanton@...a.com, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [block?] general protection fault in blk_mq_free_tags_callback

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

arch/x86/kvm/emulate.c:4091:2: error: call to undeclared function 'F'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
arch/x86/kvm/emulate.c:4093:2: error: field designator cannot initialize a non-struct, non-union type 'u8[7]' (aka 'unsigned char[7]')
arch/x86/kvm/emulate.c:4094:2: error: field designator 'flags' does not refer to any field in type 'union (unnamed union at arch/x86/kvm/emulate.c:198:2)'
arch/x86/kvm/emulate.c:4094:2: error: field designator 'u' does not refer to any field in type 'union (unnamed union at arch/x86/kvm/emulate.c:198:2)'
arch/x86/kvm/emulate.c:4095:2: error: initialization of non-aggregate type 'int (*)(struct x86_emulate_ctxt *)' with a designated initializer list


Tested on:

commit:         bf2602a3 Add linux-next specific files for 20250922
git tree:       linux-next
kernel config:  https://syzkaller.appspot.com/x/.config?x=135377594f35b576
dashboard link: https://syzkaller.appspot.com/bug?extid=5c5d41e80248d610221f
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=166138e2580000