================================================================== BUG: KASAN: slab-use-after-free in is_system_glock fs/gfs2/glock.c:699 [inline] BUG: KASAN: slab-use-after-free in do_xmote+0xd88/0xe20 fs/gfs2/glock.c:814 Read of size 8 at addr ffff888000ae04b8 by task kworker/0:0H/9 CPU: 0 PID: 9 Comm: kworker/0:0H Not tainted 6.10.0-rc2-syzkaller-00097-g2df0193e62cf #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: glock_workqueue glock_work_func Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 is_system_glock fs/gfs2/glock.c:699 [inline] do_xmote+0xd88/0xe20 fs/gfs2/glock.c:814 run_queue+0x3f0/0x6b0 fs/gfs2/glock.c:900 glock_work_func+0x127/0x3e0 fs/gfs2/glock.c:1133 process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 5361: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3940 [inline] slab_alloc_node mm/slub.c:4000 [inline] kmem_cache_alloc_lru_noprof+0x121/0x2f0 mm/slub.c:4019 gfs2_alloc_inode+0x49/0x1f0 fs/gfs2/super.c:1537 alloc_inode+0x5d/0x230 fs/inode.c:261 iget5_locked fs/inode.c:1235 [inline] iget5_locked+0x1c9/0x2c0 fs/inode.c:1228 gfs2_inode_lookup+0xd1/0x8a0 fs/gfs2/inode.c:124 gfs2_dir_search+0x22c/0x2e0 fs/gfs2/dir.c:1667 gfs2_lookupi+0x3c5/0x6d0 fs/gfs2/inode.c:340 gfs2_lookup_meta+0xa8/0x180 fs/gfs2/inode.c:280 init_statfs fs/gfs2/ops_fstype.c:631 [inline] init_journal fs/gfs2/ops_fstype.c:797 [inline] init_inodes+0xf60/0x2e80 fs/gfs2/ops_fstype.c:865 gfs2_fill_super+0x1a6e/0x2b60 fs/gfs2/ops_fstype.c:1244 get_tree_bdev+0x36f/0x610 fs/super.c:1615 gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1322 vfs_get_tree+0x8f/0x380 fs/super.c:1780 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x6e1/0x1f10 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __ia32_sys_mount+0x295/0x320 fs/namespace.c:3875 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Freed by task 24: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2195 [inline] slab_free mm/slub.c:4436 [inline] kmem_cache_free+0x12f/0x3a0 mm/slub.c:4511 i_callback+0x43/0x70 fs/inode.c:250 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2809 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 run_ksoftirqd kernel/softirq.c:928 [inline] run_ksoftirqd+0x3a/0x60 kernel/softirq.c:920 smpboot_thread_fn+0x661/0xa10 kernel/smpboot.c:164 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:3072 destroy_inode+0x12c/0x1b0 fs/inode.c:316 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 gfs2_put_super+0x258/0x750 fs/gfs2/super.c:627 generic_shutdown_super+0x159/0x3d0 fs/super.c:642 kill_block_super+0x3b/0x90 fs/super.c:1676 gfs2_kill_sb+0x360/0x410 fs/gfs2/ops_fstype.c:1785 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super+0xde/0x100 fs/super.c:506 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa9b/0x2ba0 kernel/exit.c:874 do_group_exit+0xd3/0x2a0 kernel/exit.c:1023 __do_sys_exit_group kernel/exit.c:1034 [inline] __se_sys_exit_group kernel/exit.c:1032 [inline] __ia32_sys_exit_group+0x3e/0x50 kernel/exit.c:1032 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e The buggy address belongs to the object at ffff888000ae0000 which belongs to the cache gfs2_inode of size 1592 The buggy address is located 1208 bytes inside of freed 1592-byte region [ffff888000ae0000, ffff888000ae0638) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888000ae2198 pfn:0xae0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff8880216c5a01 flags: 0x7ff00000000040(head|node=0|zone=0|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 007ff00000000040 ffff888016f67e00 dead000000000122 0000000000000000 raw: ffff888000ae2198 0000000080130011 00000001ffffefff ffff8880216c5a01 head: 007ff00000000040 ffff888016f67e00 dead000000000122 0000000000000000 head: ffff888000ae2198 0000000080130011 00000001ffffefff ffff8880216c5a01 head: 007ff00000000003 ffffea000002b801 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5361, tgid 5360 (syz-executor.0), ts 57514593072, free_ts 57494276425 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x136a/0x2df0 mm/page_alloc.c:3402 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4660 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x56/0x110 mm/slub.c:2264 allocate_slab mm/slub.c:2427 [inline] new_slab+0x84/0x260 mm/slub.c:2480 ___slab_alloc+0xdac/0x1870 mm/slub.c:3666 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3756 __slab_alloc_node mm/slub.c:3809 [inline] slab_alloc_node mm/slub.c:3988 [inline] kmem_cache_alloc_lru_noprof+0x2a7/0x2f0 mm/slub.c:4019 gfs2_alloc_inode+0x49/0x1f0 fs/gfs2/super.c:1537 alloc_inode+0x5d/0x230 fs/inode.c:261 iget5_locked fs/inode.c:1235 [inline] iget5_locked+0x1c9/0x2c0 fs/inode.c:1228 gfs2_inode_lookup+0xd1/0x8a0 fs/gfs2/inode.c:124 gfs2_dir_search+0x22c/0x2e0 fs/gfs2/dir.c:1667 gfs2_lookupi+0x3c5/0x6d0 fs/gfs2/inode.c:340 gfs2_lookup_meta+0xa8/0x180 fs/gfs2/inode.c:280 init_statfs fs/gfs2/ops_fstype.c:631 [inline] init_journal fs/gfs2/ops_fstype.c:797 [inline] init_inodes+0xf60/0x2e80 fs/gfs2/ops_fstype.c:865 page last free pid 111 tgid 111 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_folios+0x991/0x1310 mm/page_alloc.c:2614 shrink_folio_list+0x348a/0x4150 mm/vmscan.c:1446 evict_folios+0x6e6/0x1bf0 mm/vmscan.c:4553 try_to_shrink_lruvec+0x618/0x9b0 mm/vmscan.c:4749 shrink_one+0x3f8/0x7c0 mm/vmscan.c:4788 shrink_many mm/vmscan.c:4851 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4951 shrink_node mm/vmscan.c:5910 [inline] kswapd_shrink_node mm/vmscan.c:6720 [inline] balance_pgdat+0x1105/0x1970 mm/vmscan.c:6911 kswapd+0x5ea/0xbf0 mm/vmscan.c:7180 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff888000ae0380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888000ae0400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888000ae0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888000ae0500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888000ae0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================