linux-kernel - Re: [syzbot] [xfs?] KASAN: slab-use-after-free Read in xfs_buf

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Message-ID: <696df95d.050a0220.3390f1.0045.GAE@google.com>
Date: Mon, 19 Jan 2026 01:29:01 -0800
From: syzbot <syzbot+0391d34e801643e2809b@...kaller.appspotmail.com>
To: hch@...radead.org, linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [xfs?] KASAN: slab-use-after-free Read in xfs_buf_rele (4)

Hello,

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

./include/linux/srcu.h:197:2: error: call to undeclared function 'lock_sync'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
./include/linux/semaphore.h:52:28: error: field designator 'name' does not refer to any field in type 'struct lockdep_map'
./include/linux/semaphore.h:52:28: error: field designator 'wait_type_inner' does not refer to any field in type 'struct lockdep_map'


Tested on:

commit:         9f73447f disable lockdep
git tree:       git://git.infradead.org/users/hch/xfs.git xfs-buf-hash
kernel config:  https://syzkaller.appspot.com/x/.config?x=8c5ac3d8b8abfcb
dashboard link: https://syzkaller.appspot.com/bug?extid=0391d34e801643e2809b
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
userspace arch: arm64

Note: no patches were applied.