On Mon, Mar 25, 2024 at 01:35:33PM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=102618b1180000 > kernel config: https://syzkaller.appspot.com/x/.config?x=fe78468a74fdc3b7 > dashboard link: https://syzkaller.appspot.com/bug?extid=fa52b47267f5cac8c654 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/0f7abe4afac7/disk-fe46a7dd.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/82598d09246c/vmlinux-fe46a7dd.xz > kernel image: https://storage.googleapis.com/syzbot-assets/efa23788c875/bzImage-fe46a7dd.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+fa52b47267f5cac8c654@xxxxxxxxxxxxxxxxxxxxxxxxx > > ====================================================== > WARNING: possible circular locking dependency detected > 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted > ------------------------------------------------------ > syz-executor.5/6047 is trying to acquire lock: > ffffffff8e21f720 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:303 [inline] > ffffffff8e21f720 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook mm/slub.c:3746 [inline] > ffffffff8e21f720 (fs_reclaim){+.+.}-{0:0}, at: slab_alloc_node mm/slub.c:3827 [inline] > ffffffff8e21f720 (fs_reclaim){+.+.}-{0:0}, at: kmem_cache_alloc+0x48/0x340 mm/slub.c:3852 > > but task is already holding lock: > ffff88801f58d958 (&qinf->qi_tree_lock){+.+.}-{3:3}, at: xfs_qm_dqget_cache_insert fs/xfs/xfs_dquot.c:825 [inline] > ffff88801f58d958 (&qinf->qi_tree_lock){+.+.}-{3:3}, at: xfs_qm_dqget+0x2c4/0x640 fs/xfs/xfs_dquot.c:901 > > which lock already depends on the new lock. #syz dup: possible deadlock in xfs_qm_dqget_cache_insert -- Dave Chinner david@xxxxxxxxxxxxx
