Hello, syzbot found the following issue on: HEAD commit: a4145ce1e7bc Merge tag 'bcachefs-2024-03-19' of https://ev.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1312764e180000 kernel config: https://syzkaller.appspot.com/x/.config?x=5c1d7ee7e74661a8 dashboard link: https://syzkaller.appspot.com/bug?extid=65f53dd6a0f7ad64c0cb 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=1737d879180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15f5c2a5180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ce90c7e9c4b9/disk-a4145ce1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/fc2e82754c55/vmlinux-a4145ce1.xz kernel image: https://storage.googleapis.com/syzbot-assets/dfc8b656ea07/bzImage-a4145ce1.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/acef21cf3ab0/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+65f53dd6a0f7ad64c0cb@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 0 to 1024 ===================================================== BUG: KMSAN: uninit-value in hfs_find_1st_rec_by_cnid+0x27a/0x3f0 fs/hfsplus/bfind.c:78 hfs_find_1st_rec_by_cnid+0x27a/0x3f0 fs/hfsplus/bfind.c:78 __hfsplus_brec_find+0x26f/0x7b0 fs/hfsplus/bfind.c:135 hfsplus_brec_find+0x445/0x970 fs/hfsplus/bfind.c:195 hfsplus_find_attr+0x30c/0x390 hfsplus_listxattr+0x586/0x1a60 fs/hfsplus/xattr.c:708 vfs_listxattr fs/xattr.c:493 [inline] listxattr+0x1f3/0x6b0 fs/xattr.c:840 path_listxattr fs/xattr.c:864 [inline] __do_sys_listxattr fs/xattr.c:876 [inline] __se_sys_listxattr fs/xattr.c:873 [inline] __x64_sys_listxattr+0x16b/0x2f0 fs/xattr.c:873 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 Uninit was created at: slab_post_alloc_hook mm/slub.c:3804 [inline] slab_alloc_node mm/slub.c:3845 [inline] __do_kmalloc_node mm/slub.c:3965 [inline] __kmalloc+0x6e4/0x1000 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] hfsplus_find_init+0x91/0x250 fs/hfsplus/bfind.c:21 hfsplus_listxattr+0x44a/0x1a60 fs/hfsplus/xattr.c:695 vfs_listxattr fs/xattr.c:493 [inline] listxattr+0x1f3/0x6b0 fs/xattr.c:840 path_listxattr fs/xattr.c:864 [inline] __do_sys_listxattr fs/xattr.c:876 [inline] __se_sys_listxattr fs/xattr.c:873 [inline] __x64_sys_listxattr+0x16b/0x2f0 fs/xattr.c:873 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 CPU: 0 PID: 5013 Comm: syz-executor378 Not tainted 6.8.0-syzkaller-11743-ga4145ce1e7bc #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
