Hello, syzbot found the following issue on: HEAD commit: 52b1853b080a Merge tag 'i2c-for-6.7-final' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10027331e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=655f8abe9fe69b3b dashboard link: https://syzkaller.appspot.com/bug?extid=4936b06b07f365af31cc 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=11d62025e80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13c38055e80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/bf8c17cb6cda/disk-52b1853b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7aa7b6d00e92/vmlinux-52b1853b.xz kernel image: https://storage.googleapis.com/syzbot-assets/dbc54614504d/bzImage-52b1853b.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/25a961b83aac/mount_0.gz Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=172c038de80000 final oops: https://syzkaller.appspot.com/x/report.txt?x=14ac038de80000 console output: https://syzkaller.appspot.com/x/log.txt?x=10ac038de80000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4936b06b07f365af31cc@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 0 to 4096 ================================================================== BUG: KASAN: out-of-bounds in nilfs_set_link+0x24d/0x2e0 fs/nilfs2/dir.c:421 Read of size 2 at addr ffff888078f08008 by task syz-executor397/5051 CPU: 1 PID: 5051 Comm: syz-executor397 Not tainted 6.7.0-rc8-syzkaller-00177-g52b1853b080a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x142/0x170 mm/kasan/report.c:588 nilfs_set_link+0x24d/0x2e0 fs/nilfs2/dir.c:421 nilfs_rename+0x5d8/0x6b0 fs/nilfs2/namei.c:414 vfs_rename+0xaba/0xde0 fs/namei.c:4844 do_renameat2+0xd5a/0x1390 fs/namei.c:4996 __do_sys_rename fs/namei.c:5042 [inline] __se_sys_rename fs/namei.c:5040 [inline] __x64_sys_rename+0x86/0x90 fs/namei.c:5040 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fb7b8290669 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffd4bb0238 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fb7b8290669 RDX: 00007fb7b8290669 RSI: 0000000020000040 RDI: 0000000020000180 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000f69 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 431bde82d7b634db R15: 00007fffd4bb02a0 </TASK> The buggy address belongs to the physical page: page:ffffea0001e3c200 refcount:1 mapcount:1 mapping:0000000000000000 index:0x55b79e908 pfn:0x78f08 memcg:ffff888141652000 anon flags: 0xfff000000a0028(uptodate|lru|mappedtodisk|swapbacked|node=0|zone=1|lastcpupid=0x7ff) page_type: 0x0() raw: 00fff000000a0028 ffffea0001391e88 ffffea00013f1b48 ffff888029cbb001 raw: 000000055b79e908 0000000000000000 0000000100000000 ffff888141652000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 5052, tgid 5052 (udevd), ts 58139256944, free_ts 52307690585 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1544 [inline] get_page_from_freelist+0x33ea/0x3570 mm/page_alloc.c:3312 __alloc_pages+0x255/0x680 mm/page_alloc.c:4568 alloc_pages_mpol+0x3de/0x640 mm/mempolicy.c:2133 vma_alloc_folio+0xf3/0x3f0 mm/mempolicy.c:2172 wp_page_copy mm/memory.c:3120 [inline] do_wp_page+0x125e/0x4d40 mm/memory.c:3511 handle_pte_fault mm/memory.c:5055 [inline] __handle_mm_fault mm/memory.c:5180 [inline] handle_mm_fault+0x1b1c/0x6680 mm/memory.c:5345 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline] handle_page_fault arch/x86/mm/fault.c:1507 [inline] exc_page_fault+0x456/0x870 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1137 [inline] free_unref_page_prepare+0x931/0xa60 mm/page_alloc.c:2347 free_unref_page_list+0x5a0/0x840 mm/page_alloc.c:2533 release_pages+0x2117/0x2400 mm/swap.c:1042 tlb_batch_pages_flush mm/mmu_gather.c:98 [inline] tlb_flush_mmu_free mm/mmu_gather.c:293 [inline] tlb_flush_mmu+0x34c/0x4e0 mm/mmu_gather.c:300 tlb_finish_mmu+0xd4/0x1f0 mm/mmu_gather.c:392 exit_mmap+0x4d3/0xc60 mm/mmap.c:3324 __mmput+0x115/0x3c0 kernel/fork.c:1349 exit_mm+0x21f/0x300 kernel/exit.c:567 do_exit+0x9af/0x2740 kernel/exit.c:856 do_group_exit+0x206/0x2c0 kernel/exit.c:1018 __do_sys_exit_group kernel/exit.c:1029 [inline] __se_sys_exit_group kernel/exit.c:1027 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1027 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Memory state around the buggy address: ffff888078f07f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888078f07f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888078f08000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888078f08080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888078f08100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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
