[EXT4 FS bs=4096, gc=1, bpg=32768, ipg=32, mo=e040e018, mo2=0002] System zones: 0-1, 15-15, 18-18, 34-34 EXT4-fs (loop8): orphan cleanup on readonly fs Quota error (device loop8): v2_read_header: Failed header read: expected=8 got=0 EXT4-fs warning (device loop8): ext4_enable_quotas:7016: Failed to enable quota tracking (type=1, err=-22, ino=4). Please run e2fsck to fix. EXT4-fs (loop8): Cannot turn on quotas: error -22 EXT4-fs error (device loop8): ext4_orphan_get:1426: comm syz.8.4414: bad orphan inode 16 ================================================================== BUG: KASAN: use-after-free in hlist_add_head include/linux/list.h:930 [inline] BUG: KASAN: use-after-free in enqueue_timer+0xa6/0x480 kernel/time/timer.c:611 Write of size 8 at addr ffff8881121764c0 by task syz.8.4414/14774 CPU: 0 PID: 14774 Comm: syz.8.4414 Tainted: G W 6.1.124-syzkaller-00114-g2055772eada0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 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+0xa6/0x480 kernel/time/timer.c:611 internal_add_timer kernel/time/timer.c:640 [inline] __mod_timer+0x8d3/0xcf0 kernel/time/timer.c:1121 mod_timer+0x1f/0x30 kernel/time/timer.c:1172 ext4_update_super+0xa41/0xe50 fs/ext4/super.c:6055 ext4_commit_super+0xe3/0x4b0 fs/ext4/super.c:6074 ext4_handle_error+0x5d8/0x870 fs/ext4/super.c:678 __ext4_error+0x260/0x480 fs/ext4/super.c:779 ext4_orphan_get+0x256/0x5f0 fs/ext4/ialloc.c:1426 ext4_orphan_cleanup+0x901/0x11b0 fs/ext4/orphan.c:467 __ext4_fill_super fs/ext4/super.c:5509 [inline] ext4_fill_super+0x7d3d/0x8450 fs/ext4/super.c:5640 get_tree_bdev+0x440/0x680 fs/super.c:1368 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5670 vfs_get_tree+0x88/0x290 fs/super.c:1575 do_new_mount+0x2ba/0xb30 fs/namespace.c:3056 path_mount+0x671/0x1070 fs/namespace.c:3386 do_mount fs/namespace.c:3399 [inline] __do_sys_mount fs/namespace.c:3607 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3584 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3584 x64_sys_call+0x49d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fd3c6f8e54a 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:00007fd3c7d86e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fd3c7d86ef0 RCX: 00007fd3c6f8e54a RDX: 0000000020000000 RSI: 0000000020000040 RDI: 00007fd3c7d86eb0 RBP: 0000000020000000 R08: 00007fd3c7d86ef0 R09: 0000000000010050 R10: 0000000000010050 R11: 0000000000000246 R12: 0000000020000040 R13: 00007fd3c7d86eb0 R14: 000000000000052c R15: 0000000020000840 Allocated by task 14046: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:379 [inline] __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388 kasan_kmalloc include/linux/kasan.h:212 [inline] kmalloc_trace+0x44/0xa0 mm/slab_common.c:1033 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] ext4_alloc_sbi fs/ext4/super.c:4253 [inline] ext4_fill_super+0x102/0x8450 fs/ext4/super.c:5627 get_tree_bdev+0x440/0x680 fs/super.c:1368 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5670 vfs_get_tree+0x88/0x290 fs/super.c:1575 do_new_mount+0x2ba/0xb30 fs/namespace.c:3056 path_mount+0x671/0x1070 fs/namespace.c:3386 do_mount fs/namespace.c:3399 [inline] __do_sys_mount fs/namespace.c:3607 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3584 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3584 x64_sys_call+0x49d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 13810: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0x131/0x180 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 mm/slub.c:1771 [inline] slab_free mm/slub.c:3686 [inline] __kmem_cache_free+0x21d/0x410 mm/slub.c:3702 kfree+0x7a/0xf0 mm/slab_common.c:990 ext4_put_super+0x9e5/0xd60 fs/ext4/super.c:1313 generic_shutdown_super+0x14f/0x370 fs/super.c:503 kill_block_super+0x7e/0xe0 fs/super.c:1472 deactivate_locked_super+0xad/0x110 fs/super.c:334 deactivate_super+0xbe/0xf0 fs/super.c:365 cleanup_mnt+0x485/0x510 fs/namespace.c:1186 __cleanup_mnt+0x19/0x20 fs/namespace.c:1193 task_work_run+0x24d/0x2e0 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0xbd0/0x2b80 kernel/exit.c:877 do_group_exit+0x21a/0x2d0 kernel/exit.c:1027 __do_sys_exit_group kernel/exit.c:1038 [inline] __se_sys_exit_group kernel/exit.c:1036 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036 x64_sys_call+0x610/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff888112176000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 1216 bytes inside of 4096-byte region [ffff888112176000, ffff888112177000) The buggy address belongs to the physical page: page:ffffea0004485c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888112174000 pfn:0x112170 head:ffffea0004485c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 ffffea0004c0aa08 ffffea0004c42008 ffff888100043380 raw: ffff888112174000 0000000000040002 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 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 295, tgid 295 (syz-executor), ts 22117251100, free_ts 22113775377 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2605 prep_new_page+0x1b/0x110 mm/page_alloc.c:2612 get_page_from_freelist+0x2f41/0x2fc0 mm/page_alloc.c:4477 __alloc_pages+0x234/0x610 mm/page_alloc.c:5775 alloc_slab_page+0x6c/0xf0 allocate_slab mm/slub.c:1962 [inline] new_slab+0x90/0x3e0 mm/slub.c:2015 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203 __slab_alloc+0x5d/0xa0 mm/slub.c:3302 slab_alloc_node mm/slub.c:3387 [inline] __kmem_cache_alloc_node+0x207/0x2a0 mm/slub.c:3462 __do_kmalloc_node mm/slab_common.c:937 [inline] __kmalloc_node_track_caller+0xa2/0x1e0 mm/slab_common.c:958 kmalloc_reserve net/core/skbuff.c:446 [inline] __alloc_skb+0x125/0x2d0 net/core/skbuff.c:515 alloc_skb include/linux/skbuff.h:1290 [inline] nlmsg_new include/net/netlink.h:991 [inline] rtmsg_ifinfo_build_skb+0x7f/0x180 net/core/rtnetlink.c:3963 rtmsg_ifinfo_event net/core/rtnetlink.c:3999 [inline] rtmsg_ifinfo+0x78/0x120 net/core/rtnetlink.c:4008 __dev_notify_flags+0xdd/0x610 net/core/dev.c:8645 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8687 do_setlink+0xdb8/0x4050 net/core/rtnetlink.c:2830 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1513 [inline] free_pcp_prepare mm/page_alloc.c:1587 [inline] free_unref_page_prepare+0x9f1/0xa00 mm/page_alloc.c:3526 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3622 free_the_page mm/page_alloc.c:798 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5864 __free_slab+0xce/0x1a0 mm/slub.c:2039 free_slab mm/slub.c:2054 [inline] discard_slab mm/slub.c:2060 [inline] __unfreeze_partials+0x165/0x1a0 mm/slub.c:2609 put_cpu_partial+0xa9/0x100 mm/slub.c:2685 __slab_free+0x1c8/0x280 mm/slub.c:3563 do_slab_free mm/slub.c:3640 [inline] ___cache_free+0xc6/0xd0 mm/slub.c:3696 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0xc5/0x140 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:310 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:768 slab_alloc_node mm/slub.c:3421 [inline] __kmem_cache_alloc_node+0x193/0x2a0 mm/slub.c:3462 kmalloc_trace+0x2a/0xa0 mm/slab_common.c:1028 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] ref_tracker_alloc+0x138/0x450 lib/ref_tracker.c:85 __netdev_tracker_alloc include/linux/netdevice.h:4076 [inline] netdev_hold+0x92/0xe0 include/linux/netdevice.h:4105 Memory state around the buggy address: ffff888112176380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888112176400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888112176480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888112176500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888112176580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ext4_test_bit(bit=15, block=18) = 1 is_bad_inode(inode)=0 NEXT_ORPHAN(inode)=0 max_ino=32 i_nlink=2 EXT4-fs (loop8): mounted filesystem without journal. Quota mode: writeback. fscrypt (loop8, inode 16): Error -61 getting encryption context fscrypt (loop8, inode 16): Error -61 getting encryption context binfmt_misc: register: failed to install interpreter file ./file2