================================================================== BUG: KASAN: slab-use-after-free in inode_state_read_once include/linux/fs.h:884 [inline] BUG: KASAN: slab-use-after-free in iput+0x3a7/0xe80 fs/inode.c:1986 Read of size 4 at addr ffff888011803738 by task kworker/0:3/1345 CPU: 0 UID: 0 PID: 1345 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: events fserror_worker Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xba/0x230 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 inode_state_read_once include/linux/fs.h:884 [inline] iput+0x3a7/0xe80 fs/inode.c:1986 fserror_worker+0x230/0x350 fs/fserror.c:69 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 5374: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4459 [inline] slab_alloc_node mm/slub.c:4788 [inline] kmem_cache_alloc_lru_noprof+0x2b8/0x640 mm/slub.c:4807 xfs_inode_alloc+0x7e/0x710 fs/xfs/xfs_icache.c:97 xfs_iget_cache_miss fs/xfs/xfs_icache.c:635 [inline] xfs_iget+0xa8f/0x2e40 fs/xfs/xfs_icache.c:799 xfs_lookup+0x321/0x670 fs/xfs/xfs_inode.c:553 xfs_vn_lookup+0x130/0x200 fs/xfs/xfs_iops.c:327 __lookup_slow+0x2b7/0x410 fs/namei.c:1916 lookup_slow+0x53/0x70 fs/namei.c:1933 ovl_lookup_positive_unlocked fs/overlayfs/namei.c:211 [inline] ovl_lookup_single+0x32f/0xea0 fs/overlayfs/namei.c:255 ovl_lookup_layer+0x377/0x450 fs/overlayfs/namei.c:360 ovl_lookup_layers fs/overlayfs/namei.c:1163 [inline] ovl_lookup+0x9b0/0x1c80 fs/overlayfs/namei.c:1398 lookup_one_qstr_excl+0x131/0x360 fs/namei.c:1805 __start_dirop fs/namei.c:2925 [inline] start_dirop fs/namei.c:2934 [inline] filename_unlinkat+0x2ba/0x610 fs/namei.c:5521 __do_sys_unlinkat fs/namei.c:5569 [inline] __se_sys_unlinkat+0x83/0x1a0 fs/namei.c:5561 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5374: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2670 [inline] slab_free mm/slub.c:6082 [inline] kmem_cache_free+0x187/0x630 mm/slub.c:6212 rcu_do_batch kernel/rcu/tree.c:2617 [inline] rcu_core+0x7cd/0x1070 kernel/rcu/tree.c:2869 handle_softirqs+0x22a/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 __call_rcu_common kernel/rcu/tree.c:3131 [inline] call_rcu+0xee/0x890 kernel/rcu/tree.c:3251 xfs_iget_cache_miss fs/xfs/xfs_icache.c:740 [inline] xfs_iget+0xb0e/0x2e40 fs/xfs/xfs_icache.c:799 xfs_lookup+0x321/0x670 fs/xfs/xfs_inode.c:553 xfs_vn_lookup+0x130/0x200 fs/xfs/xfs_iops.c:327 __lookup_slow+0x2b7/0x410 fs/namei.c:1916 lookup_slow+0x53/0x70 fs/namei.c:1933 ovl_lookup_positive_unlocked fs/overlayfs/namei.c:211 [inline] ovl_lookup_single+0x32f/0xea0 fs/overlayfs/namei.c:255 ovl_lookup_layer+0x377/0x450 fs/overlayfs/namei.c:360 ovl_lookup_layers fs/overlayfs/namei.c:1163 [inline] ovl_lookup+0x9b0/0x1c80 fs/overlayfs/namei.c:1398 lookup_one_qstr_excl+0x131/0x360 fs/namei.c:1805 __start_dirop fs/namei.c:2925 [inline] start_dirop fs/namei.c:2934 [inline] filename_unlinkat+0x2ba/0x610 fs/namei.c:5521 __do_sys_unlinkat fs/namei.c:5569 [inline] __se_sys_unlinkat+0x83/0x1a0 fs/namei.c:5561 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888011803480 which belongs to the cache xfs_inode of size 1784 The buggy address is located 696 bytes inside of freed 1784-byte region [ffff888011803480, ffff888011803b78) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11800 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888011803c01 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff888031aaf8c0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000800080008 00000000f5000000 ffff888011803c01 head: 00fff00000000040 ffff888031aaf8c0 dead000000000122 0000000000000000 head: 0000000000000000 0000000800080008 00000000f5000000 ffff888011803c01 head: 00fff00000000002 ffffea0000460001 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_RECLAIMABLE|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5374, tgid 5373 (syz.0.0), ts 371036972383, free_ts 367309687530 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1888 prep_new_page mm/page_alloc.c:1896 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3961 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5249 alloc_slab_page mm/slub.c:3238 [inline] allocate_slab+0x77/0x660 mm/slub.c:3411 new_slab mm/slub.c:3469 [inline] refill_objects+0x331/0x3c0 mm/slub.c:7091 refill_sheaf mm/slub.c:2787 [inline] __pcs_replace_empty_main+0x2b9/0x620 mm/slub.c:4536 alloc_from_pcs mm/slub.c:4639 [inline] slab_alloc_node mm/slub.c:4773 [inline] kmem_cache_alloc_lru_noprof+0x37c/0x640 mm/slub.c:4807 xfs_inode_alloc+0x7e/0x710 fs/xfs/xfs_icache.c:97 xfs_iget_cache_miss fs/xfs/xfs_icache.c:635 [inline] xfs_iget+0xa8f/0x2e40 fs/xfs/xfs_icache.c:799 xfs_icreate fs/xfs/xfs_inode.c:600 [inline] xfs_create_tmpfile+0x309/0x610 fs/xfs/xfs_inode.c:829 xfs_rename_alloc_whiteout fs/xfs/xfs_inode.c:2094 [inline] xfs_rename+0x3db/0x19d0 fs/xfs/xfs_inode.c:2167 xfs_vn_rename+0x2c7/0x3b0 fs/xfs/xfs_iops.c:499 vfs_rename+0xa96/0xeb0 fs/namei.c:6026 ovl_do_rename_rd fs/overlayfs/overlayfs.h:364 [inline] ovl_check_rename_whiteout fs/overlayfs/super.c:598 [inline] ovl_make_workdir fs/overlayfs/super.c:717 [inline] ovl_get_workdir fs/overlayfs/super.c:840 [inline] ovl_fill_super_creds fs/overlayfs/super.c:1453 [inline] ovl_fill_super+0x4677/0x5e60 fs/overlayfs/super.c:1567 vfs_get_super fs/super.c:1327 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1346 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 page last free pid 5349 tgid 5349 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1432 [inline] __free_frozen_pages+0xc00/0xd90 mm/page_alloc.c:2977 __slab_free+0x263/0x2b0 mm/slub.c:5490 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4459 [inline] slab_alloc_node mm/slub.c:4788 [inline] __kmalloc_cache_noprof+0x2ba/0x660 mm/slub.c:5292 kmalloc_noprof include/linux/slab.h:962 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:664 [inline] netdevice_event+0x3cb/0x8f0 drivers/infiniband/core/roce_gid_mgmt.c:823 notifier_call_chain+0x1be/0x400 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2280 [inline] call_netdevice_notifiers net/core/dev.c:2294 [inline] netif_set_mac_address+0x39f/0x4e0 net/core/dev.c:9987 do_setlink+0x9b1/0x4590 net/core/rtnetlink.c:3110 rtnl_changelink net/core/rtnetlink.c:3776 [inline] __rtnl_newlink net/core/rtnetlink.c:3935 [inline] rtnl_newlink+0x15a9/0x1be0 net/core/rtnetlink.c:4072 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6958 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] __sys_sendto+0x709/0x7a0 net/socket.c:2206 Memory state around the buggy address: ffff888011803600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888011803680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888011803700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888011803780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888011803800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================