================================================================== BUG: KASAN: slab-use-after-free in __lock_acquire+0x77/0x1fd0 kernel/locking/lockdep.c:5005 Read of size 8 at addr ffff888026e8a7b8 by task kworker/u4:13/14711 CPU: 0 PID: 14711 Comm: kworker/u4:13 Not tainted 6.7.0-rc4-syzkaller-00039-g9ace34a8e446 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Workqueue: btrfs-delalloc btrfs_work_helper Call Trace: __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 __lock_acquire+0x77/0x1fd0 kernel/locking/lockdep.c:5005 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:518 [inline] try_to_wake_up+0xb5/0x1440 kernel/sched/core.c:4226 submit_compressed_extents+0xde/0x1a50 fs/btrfs/inode.c:1587 run_ordered_work fs/btrfs/async-thread.c:289 [inline] btrfs_work_helper+0x923/0xbe0 fs/btrfs/async-thread.c:325 process_one_work kernel/workqueue.c:2627 [inline] process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2700 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2781 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Allocated by task 2: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6c/0x3c0 mm/slab.h:763 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x1dd/0x310 mm/slub.c:3523 alloc_task_struct_node kernel/fork.c:173 [inline] dup_task_struct+0x57/0x7d0 kernel/fork.c:1110 copy_process+0x5d1/0x3fb0 kernel/fork.c:2332 kernel_clone+0x222/0x840 kernel/fork.c:2907 kernel_thread+0x1bc/0x230 kernel/fork.c:2969 create_kthread kernel/kthread.c:411 [inline] kthreadd+0x60c/0x810 kernel/kthread.c:764 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Freed by task 16592: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] kmem_cache_free+0x299/0x470 mm/slub.c:3831 put_task_struct include/linux/sched/task.h:136 [inline] delayed_put_task_struct+0x115/0x2c0 kernel/exit.c:227 rcu_do_batch kernel/rcu/tree.c:2158 [inline] rcu_core+0xad8/0x17c0 kernel/rcu/tree.c:2431 __do_softirq+0x2b8/0x939 kernel/softirq.c:553 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2681 [inline] call_rcu+0x167/0xa80 kernel/rcu/tree.c:2795 context_switch kernel/sched/core.c:5379 [inline] __schedule+0x1969/0x4ab0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0x149/0x260 kernel/sched/core.c:6778 io_schedule+0x8c/0x100 kernel/sched/core.c:8998 bit_wait_io+0x12/0xc0 kernel/sched/wait_bit.c:209 __wait_on_bit+0xac/0x2e0 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0x1d4/0x250 kernel/sched/wait_bit.c:64 wait_on_buffer include/linux/buffer_head.h:392 [inline] ext4_commit_super+0x3b5/0x4c0 fs/ext4/super.c:6222 ext4_handle_error+0x5f0/0x8b0 fs/ext4/super.c:736 __ext4_error_inode+0x322/0x4e0 fs/ext4/super.c:877 check_xattrs+0x2d6/0xbc0 fs/ext4/xattr.c:289 __ext4_xattr_check_block fs/ext4/xattr.c:303 [inline] ext4_xattr_block_get fs/ext4/xattr.c:596 [inline] ext4_xattr_get+0x2b8/0x840 fs/ext4/xattr.c:714 vfs_getxattr_alloc+0x46d/0x5b0 fs/xattr.c:394 ima_read_xattr+0x38/0x60 security/integrity/ima/ima_appraise.c:231 process_measurement+0x118a/0x21c0 security/integrity/ima/ima_main.c:340 ima_file_check+0xf1/0x170 security/integrity/ima/ima_main.c:557 do_open fs/namei.c:3624 [inline] path_openat+0x2897/0x3290 fs/namei.c:3779 do_filp_open+0x234/0x490 fs/namei.c:3809 do_sys_openat2+0x13e/0x1d0 fs/open.c:1440 do_sys_open fs/open.c:1455 [inline] __do_sys_openat fs/open.c:1471 [inline] __se_sys_openat fs/open.c:1466 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1466 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 Second to last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2681 [inline] call_rcu+0x167/0xa80 kernel/rcu/tree.c:2795 context_switch kernel/sched/core.c:5379 [inline] __schedule+0x1969/0x4ab0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0x149/0x260 kernel/sched/core.c:6778 do_nanosleep+0x196/0x5f0 kernel/time/hrtimer.c:2047 hrtimer_nanosleep+0x226/0x460 kernel/time/hrtimer.c:2100 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1396 [inline] __se_sys_clock_nanosleep+0x327/0x3b0 kernel/time/posix-timers.c:1373 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 The buggy address belongs to the object at ffff888026e89dc0 which belongs to the cache task_struct of size 7360 The buggy address is located 2552 bytes inside of freed 7360-byte region [ffff888026e89dc0, ffff888026e8ba80) The buggy address belongs to the physical page: page:ffffea00009ba200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x26e88 head:ffffea00009ba200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88803075e7c1 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888014e51500 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000040004 00000001ffffffff ffff88803075e7c1 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 2, tgid 2 (kthreadd), ts 698539594196, free_ts 698306158324 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 alloc_slab_page+0x6a/0x170 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x84/0x2f0 mm/slub.c:2070 ___slab_alloc+0xc8a/0x1330 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] kmem_cache_alloc_node+0x22b/0x310 mm/slub.c:3523 alloc_task_struct_node kernel/fork.c:173 [inline] dup_task_struct+0x57/0x7d0 kernel/fork.c:1110 copy_process+0x5d1/0x3fb0 kernel/fork.c:2332 kernel_clone+0x222/0x840 kernel/fork.c:2907 kernel_thread+0x1bc/0x230 kernel/fork.c:2969 create_kthread kernel/kthread.c:411 [inline] kthreadd+0x60c/0x810 kernel/kthread.c:764 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 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+0x37/0x3f0 mm/page_alloc.c:2487 discard_slab mm/slub.c:2116 [inline] __unfreeze_partials+0x1e0/0x220 mm/slub.c:2655 put_cpu_partial+0x17b/0x250 mm/slub.c:2731 __slab_free+0x2b6/0x390 mm/slub.c:3679 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6c/0x3c0 mm/slab.h:763 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x1dd/0x310 mm/slub.c:3523 __alloc_skb+0x181/0x420 net/core/skbuff.c:641 alloc_skb include/linux/skbuff.h:1286 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1214 [inline] netlink_sendmsg+0x6fc/0xd70 net/netlink/af_netlink.c:1885 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x592/0x890 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 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: ffff888026e8a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888026e8a700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888026e8a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888026e8a800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888026e8a880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================