EXT4-fs (loop1): Cannot turn on journaled quota: type 1: error -117 EXT4-fs error (device loop1): ext4_xattr_ibody_find:2195: inode #15: comm syz.1.8981: corrupted in-inode xattr ================================================================== BUG: KASAN: use-after-free in hlist_add_head include/linux/list.h:930 [inline] BUG: KASAN: use-after-free in enqueue_timer+0xae/0x480 kernel/time/timer.c:611 Write of size 8 at addr ffff88812613a4c0 by task syz.1.8981/1600 CPU: 1 PID: 1600 Comm: syz.1.8981 Not tainted 6.1.141-syzkaller-00038-ge2deb0b42a3a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x71/0x210 mm/kasan/report.c:316 print_report+0x4a/0x60 mm/kasan/report.c:427 kasan_report+0x122/0x150 mm/kasan/report.c:531 __asan_report_store8_noabort+0x17/0x20 mm/kasan/report_generic.c:356 hlist_add_head include/linux/list.h:930 [inline] enqueue_timer+0xae/0x480 kernel/time/timer.c:611 __mod_timer+0x79f/0xb30 kernel/time/timer.c:-1 mod_timer+0x1f/0x30 kernel/time/timer.c:1172 ext4_update_super+0xa54/0xe40 fs/ext4/super.c:6068 ext4_commit_super+0xe3/0x4b0 fs/ext4/super.c:6087 ext4_handle_error+0x5c8/0x860 fs/ext4/super.c:678 __ext4_error_inode+0x2ce/0x560 fs/ext4/super.c:811 __xattr_check_inode fs/ext4/xattr.c:278 [inline] ext4_xattr_ibody_find+0x3ab/0x550 fs/ext4/xattr.c:2195 ext4_find_inline_data_nolock+0x137/0x380 fs/ext4/inline.c:157 ext4_iget_extra_inode+0x179/0x340 fs/ext4/inode.c:4752 __ext4_iget+0x1c29/0x3cb0 fs/ext4/inode.c:5039 ext4_orphan_get+0x1d1/0x620 fs/ext4/ialloc.c:1400 ext4_orphan_cleanup+0x9b5/0x1210 fs/ext4/orphan.c:467 __ext4_fill_super fs/ext4/super.c:5522 [inline] ext4_fill_super+0x73e6/0x7930 fs/ext4/super.c:5653 get_tree_bdev+0x444/0x680 fs/super.c:1368 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5683 vfs_get_tree+0x9a/0x270 fs/super.c:1575 do_new_mount+0x25a/0xa20 fs/namespace.c:3054 path_mount+0x675/0x1010 fs/namespace.c:3384 do_mount fs/namespace.c:3397 [inline] __do_sys_mount fs/namespace.c:3605 [inline] __se_sys_mount+0x318/0x380 fs/namespace.c:3582 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3582 x64_sys_call+0x65d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f48a7f900ca Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f48a8ed4e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f48a8ed4ef0 RCX: 00007f48a7f900ca RDX: 0000200000000040 RSI: 0000200000000080 RDI: 00007f48a8ed4eb0 RBP: 0000200000000040 R08: 00007f48a8ed4ef0 R09: 0000000022000406 R10: 0000000022000406 R11: 0000000000000246 R12: 0000200000000080 R13: 00007f48a8ed4eb0 R14: 00000000000004aa R15: 0000200000000440 Allocated by task 21070: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x25/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:379 [inline] __kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:388 kasan_kmalloc include/linux/kasan.h:212 [inline] kmalloc_trace+0x40/0xb0 mm/slab_common.c:1033 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] kernfs_iop_get_link+0x65/0x620 fs/kernfs/symlink.c:135 pick_link+0x6dd/0xe30 fs/namei.c:-1 step_into+0xc4c/0xf30 fs/namei.c:1867 open_last_lookups fs/namei.c:3572 [inline] path_openat+0x1651/0x2f50 fs/namei.c:3779 do_filp_open+0x1c1/0x3c0 fs/namei.c:3809 do_sys_openat2+0x185/0x7e0 fs/open.c:1341 do_sys_open fs/open.c:1357 [inline] __do_sys_openat fs/open.c:1373 [inline] __se_sys_openat fs/open.c:1368 [inline] __x64_sys_openat+0x136/0x160 fs/open.c:1368 x64_sys_call+0x783/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 21070: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x31/0x50 mm/kasan/generic.c:516 ____kasan_slab_free+0x132/0x180 mm/kasan/common.c:241 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249 kasan_slab_free include/linux/kasan.h:178 [inline] slab_free_hook mm/slub.c:1745 [inline] slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1771 slab_free mm/slub.c:3686 [inline] __kmem_cache_free+0xb7/0x1b0 mm/slub.c:3702 kfree+0x6f/0xf0 mm/slab_common.c:990 kfree_link+0x15/0x20 fs/libfs.c:1233 do_delayed_call include/linux/delayed_call.h:28 [inline] put_link fs/namei.c:1022 [inline] open_last_lookups fs/namei.c:3571 [inline] path_openat+0x155d/0x2f50 fs/namei.c:3779 do_filp_open+0x1c1/0x3c0 fs/namei.c:3809 do_sys_openat2+0x185/0x7e0 fs/open.c:1341 do_sys_open fs/open.c:1357 [inline] __do_sys_openat fs/open.c:1373 [inline] __se_sys_openat fs/open.c:1368 [inline] __x64_sys_openat+0x136/0x160 fs/open.c:1368 x64_sys_call+0x783/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88812613a000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 1216 bytes inside of 4096-byte region [ffff88812613a000, ffff88812613b000) The buggy address belongs to the physical page: page:ffffea0004984e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x126138 head:ffffea0004984e00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 ffffea0004ba9e00 dead000000000002 ffff888100043380 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 18246, tgid 18243 (syz.4.4789), ts 1841747830284, free_ts 1110896895218 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2637 prep_new_page+0x1c/0x110 mm/page_alloc.c:2644 get_page_from_freelist+0x2c7b/0x2cf0 mm/page_alloc.c:4539 __alloc_pages+0x19e/0x3a0 mm/page_alloc.c:5850 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1 allocate_slab mm/slub.c:1962 [inline] new_slab+0x98/0x3d0 mm/slub.c:2015 ___slab_alloc+0x6f6/0xb50 mm/slub.c:3203 __slab_alloc+0x5e/0xa0 mm/slub.c:3302 slab_alloc_node mm/slub.c:3387 [inline] __kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3462 __do_kmalloc_node mm/slab_common.c:937 [inline] __kmalloc_node_track_caller+0xa0/0x1e0 mm/slab_common.c:958 kmalloc_reserve net/core/skbuff.c:449 [inline] __alloc_skb+0x236/0x4b0 net/core/skbuff.c:518 alloc_skb_fclone include/linux/skbuff.h:1340 [inline] tipc_buf_acquire+0x2b/0xe0 net/tipc/msg.c:72 tipc_msg_build+0x550/0xfd0 net/tipc/msg.c:422 tipc_sendmcast net/tipc/socket.c:881 [inline] __tipc_sendmsg+0x19dd/0x2680 net/tipc/socket.c:1469 tipc_sendmsg+0x55/0x70 net/tipc/socket.c:1403 sock_sendmsg_nosec net/socket.c:716 [inline] __sock_sendmsg net/socket.c:728 [inline] sock_sendmsg net/socket.c:751 [inline] kernel_sendmsg+0x222/0x320 net/socket.c:775 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1545 [inline] free_pcp_prepare mm/page_alloc.c:1619 [inline] free_unref_page_prepare+0x742/0x750 mm/page_alloc.c:3581 free_unref_page+0x8f/0x530 mm/page_alloc.c:3677 free_the_page mm/page_alloc.c:830 [inline] __free_pages+0x67/0x100 mm/page_alloc.c:5939 __vunmap+0x9af/0xb70 mm/vmalloc.c:2729 __vfree mm/vmalloc.c:2778 [inline] vfree+0x61/0x90 mm/vmalloc.c:2809 kcov_put kernel/kcov.c:437 [inline] kcov_close+0x2b/0x50 kernel/kcov.c:533 __fput+0x1fc/0x8f0 fs/file_table.c:320 ____fput+0x15/0x20 fs/file_table.c:348 task_work_run+0x1db/0x240 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0xa1d/0x2650 kernel/exit.c:877 do_group_exit+0x210/0x2d0 kernel/exit.c:1027 get_signal+0x13b5/0x1520 kernel/signal.c:2889 arch_do_signal_or_restart+0xb0/0x1030 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x7a/0xb0 kernel/entry/common.c:174 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303 Memory state around the buggy address: ffff88812613a380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88812613a400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88812613a480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88812613a500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88812613a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== EXT4-fs error (device loop1): ext4_orphan_get:1405: comm syz.1.8981: couldn't read orphan inode 15 (err -117) EXT4-fs (loop1): mounted filesystem without journal. Quota mode: writeback.