Hello, syzbot found the following issue on: HEAD commit: fbafc3e621c3 Merge tag 'for_linus' of git://git.kernel.org.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1770ee26e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=e0c7078a6b901aa3 dashboard link: https://syzkaller.appspot.com/bug?extid=55ad87f38795d6787521 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=17ea9be9e80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=149e8179e80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/1520f7b6daa4/disk-fbafc3e6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8b490af009d5/vmlinux-fbafc3e6.xz kernel image: https://storage.googleapis.com/syzbot-assets/202ca200f4a4/bzImage-fbafc3e6.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/78ed00b58340/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+55ad87f38795d6787521@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in __hfsplus_ext_read_extent fs/hfsplus/extents.c:167 [inline] BUG: KMSAN: uninit-value in __hfsplus_ext_cache_extent+0x82a/0x960 fs/hfsplus/extents.c:191 __hfsplus_ext_read_extent fs/hfsplus/extents.c:167 [inline] __hfsplus_ext_cache_extent+0x82a/0x960 fs/hfsplus/extents.c:191 hfsplus_ext_read_extent fs/hfsplus/extents.c:218 [inline] hfsplus_file_extend+0x775/0x1b90 fs/hfsplus/extents.c:461 hfsplus_get_block+0xe99/0x1690 fs/hfsplus/extents.c:245 __block_write_begin_int+0x946/0x2c70 fs/buffer.c:2119 __block_write_begin fs/buffer.c:2168 [inline] block_write_begin+0x143/0x450 fs/buffer.c:2227 cont_write_begin+0xd5c/0x12f0 fs/buffer.c:2582 hfsplus_write_begin+0x9a/0x130 fs/hfsplus/inode.c:52 generic_perform_write+0x3f5/0xc40 mm/filemap.c:3918 __generic_file_write_iter+0x20a/0x460 mm/filemap.c:4013 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:4039 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x1490 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0x121/0x3c0 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] hfsplus_find_init+0x91/0x250 fs/hfsplus/bfind.c:21 hfsplus_ext_read_extent fs/hfsplus/extents.c:216 [inline] hfsplus_file_extend+0x6d8/0x1b90 fs/hfsplus/extents.c:461 hfsplus_get_block+0xe99/0x1690 fs/hfsplus/extents.c:245 __block_write_begin_int+0x946/0x2c70 fs/buffer.c:2119 __block_write_begin fs/buffer.c:2168 [inline] block_write_begin+0x143/0x450 fs/buffer.c:2227 cont_write_begin+0xd5c/0x12f0 fs/buffer.c:2582 hfsplus_write_begin+0x9a/0x130 fs/hfsplus/inode.c:52 generic_perform_write+0x3f5/0xc40 mm/filemap.c:3918 __generic_file_write_iter+0x20a/0x460 mm/filemap.c:4013 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:4039 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x1490 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b CPU: 0 PID: 5003 Comm: syz-executor371 Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ===================================================== --- 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
