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SubjectRe: [syzbot] [iommu?] KASAN: slab-use-after-free Read in iommufd_vfio_ioas
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Hello,

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

./include/linux/stddef.h:8:14: error: incompatible types when assigning to type 'struct iommufd_object' from type 'void *'


Tested on:

commit: 2af9b20d Merge tag 'x86-urgent-2023-10-28' of git://gi..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel config: https://syzkaller.appspot.com/x/.config?x=cb98fe061049a6e4
dashboard link: https://syzkaller.appspot.com/bug?extid=d31adfb277377ef8fcba
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=178165a0e80000

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