Hello, syzbot found the following issue on: HEAD commit: 66a27abac311 Merge tag 'powerpc-6.9-1' of git://git.kernel.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=147b32a5180000 kernel config: https://syzkaller.appspot.com/x/.config?x=48bb382b96e7eda7 dashboard link: https://syzkaller.appspot.com/bug?extid=eb83fe1cce5833cd66a0 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12598006180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=105d8aa5180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/37968fa0451e/disk-66a27aba.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5b288c5c3088/vmlinux-66a27aba.xz kernel image: https://storage.googleapis.com/syzbot-assets/792ddbf8146d/bzImage-66a27aba.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+eb83fe1cce5833cd66a0@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in fscache_relinquish_cookie include/linux/fscache.h:307 [inline] BUG: KMSAN: uninit-value in v9fs_evict_inode+0x109/0x130 fs/9p/vfs_inode.c:356 fscache_relinquish_cookie include/linux/fscache.h:307 [inline] v9fs_evict_inode+0x109/0x130 fs/9p/vfs_inode.c:356 evict+0x3ae/0xa60 fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput+0x9ca/0xe10 fs/inode.c:1767 iget_failed+0x15e/0x180 fs/bad_inode.c:248 v9fs_fid_iget_dotl+0x375/0x570 fs/9p/vfs_inode_dotl.c:96 v9fs_get_inode_from_fid fs/9p/v9fs.h:230 [inline] v9fs_mount+0xc02/0x12b0 fs/9p/vfs_super.c:142 legacy_get_tree+0x114/0x290 fs/fs_context.c:662 vfs_get_tree+0xa7/0x570 fs/super.c:1779 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352 path_mount+0x742/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3875 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 Uninit was created at: __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2175 [inline] allocate_slab mm/slub.c:2338 [inline] new_slab+0x2de/0x1400 mm/slub.c:2391 ___slab_alloc+0x1184/0x33d0 mm/slub.c:3525 __slab_alloc mm/slub.c:3610 [inline] __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmem_cache_alloc_lru+0x6d7/0xbe0 mm/slub.c:3864 alloc_inode_sb include/linux/fs.h:3089 [inline] v9fs_alloc_inode+0x62/0x130 fs/9p/vfs_inode.c:228 alloc_inode+0x86/0x460 fs/inode.c:261 iget_locked+0x2bf/0xee0 fs/inode.c:1280 v9fs_fid_iget_dotl+0x7f/0x570 fs/9p/vfs_inode_dotl.c:62 v9fs_get_inode_from_fid fs/9p/v9fs.h:230 [inline] v9fs_mount+0xc02/0x12b0 fs/9p/vfs_super.c:142 legacy_get_tree+0x114/0x290 fs/fs_context.c:662 vfs_get_tree+0xa7/0x570 fs/super.c:1779 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352 path_mount+0x742/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3875 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 CPU: 1 PID: 5014 Comm: syz-executor406 Not tainted 6.8.0-syzkaller-11136-g66a27abac311 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
