================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline] BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] BUG: KASAN: slab-use-after-free in mapping_inaccessible include/linux/pagemap.h:336 [inline] BUG: KASAN: slab-use-after-free in move_to_new_folio+0x145/0x490 mm/migrate.c:1087 Read of size 8 at addr ffff888053fed3a0 by task kcompactd1/30 CPU: 0 UID: 0 PID: 30 Comm: kcompactd1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] mapping_inaccessible include/linux/pagemap.h:336 [inline] move_to_new_folio+0x145/0x490 mm/migrate.c:1087 migrate_folio_move mm/migrate.c:1370 [inline] migrate_folios_move mm/migrate.c:1719 [inline] migrate_pages_batch+0x1d38/0x35c0 mm/migrate.c:1966 migrate_pages_sync mm/migrate.c:1996 [inline] migrate_pages+0x1bcc/0x2930 mm/migrate.c:2105 compact_zone+0x23e1/0x4ab0 mm/compaction.c:2647 compact_node+0x1d2/0x280 mm/compaction.c:2916 kcompactd+0xbc8/0x1290 mm/compaction.c:3214 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 5982: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:330 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:356 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4180 [inline] slab_alloc_node mm/slub.c:4229 [inline] kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4236 gfs2_glock_get+0x263/0xec0 fs/gfs2/glock.c:1182 gfs2_inode_lookup+0x215/0xb10 fs/gfs2/inode.c:135 gfs2_dir_search+0x168/0x220 fs/gfs2/dir.c:1665 gfs2_lookupi+0x3d9/0x5a0 fs/gfs2/inode.c:340 gfs2_jindex_hold fs/gfs2/ops_fstype.c:574 [inline] init_journal+0x54a/0x2260 fs/gfs2/ops_fstype.c:716 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:851 gfs2_fill_super+0x1923/0x20d0 fs/gfs2/ops_fstype.c:1253 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1692 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1335 vfs_get_tree+0x92/0x2b0 fs/super.c:1815 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808 do_mount fs/namespace.c:4136 [inline] __do_sys_mount fs/namespace.c:4347 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4324 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 15: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:243 [inline] __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:275 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2417 [inline] slab_free mm/slub.c:4680 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4782 rcu_do_batch kernel/rcu/tree.c:2605 [inline] rcu_core+0xca8/0x1770 kernel/rcu/tree.c:2861 handle_softirqs+0x283/0x870 kernel/softirq.c:579 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:160 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548 __call_rcu_common kernel/rcu/tree.c:3123 [inline] call_rcu+0x157/0x9c0 kernel/rcu/tree.c:3243 __gfs2_glock_free+0xb44/0xc90 fs/gfs2/glock.c:172 gfs2_glock_free+0x3c/0xa0 fs/gfs2/glock.c:178 gfs2_glock_put_eventually fs/gfs2/super.c:1183 [inline] gfs2_evict_inode+0xae7/0x1000 fs/gfs2/super.c:1458 evict+0x501/0x9c0 fs/inode.c:810 gfs2_jindex_free+0x39c/0x440 fs/gfs2/super.c:79 init_journal+0x8f1/0x2260 fs/gfs2/ops_fstype.c:833 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:851 gfs2_fill_super+0x1923/0x20d0 fs/gfs2/ops_fstype.c:1253 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1692 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1335 vfs_get_tree+0x92/0x2b0 fs/super.c:1815 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808 do_mount fs/namespace.c:4136 [inline] __do_sys_mount fs/namespace.c:4347 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4324 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Second to last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548 insert_work+0x3d/0x330 kernel/workqueue.c:2184 __queue_work+0xcd2/0xfb0 kernel/workqueue.c:2339 queue_delayed_work_on+0x18b/0x280 kernel/workqueue.c:2559 queue_delayed_work include/linux/workqueue.h:684 [inline] gfs2_glock_queue_work fs/gfs2/glock.c:250 [inline] do_xmote+0xce0/0x1260 fs/gfs2/glock.c:838 glock_work_func+0x2a8/0x580 fs/gfs2/glock.c:1095 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff888053fecfd8 which belongs to the cache gfs2_glock(aspace) of size 1224 The buggy address is located 968 bytes inside of freed 1224-byte region [ffff888053fecfd8, ffff888053fed4a0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x53fec head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff8880327bb500 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 head: 04fff00000000040 ffff8880327bb500 dead000000000122 0000000000000000 head: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 head: 04fff00000000002 ffffea00014ffb01 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 Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5982, tgid 5981 (syz.0.16), ts 157793679643, free_ts 157685992275 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1859 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:2487 [inline] allocate_slab+0x8a/0x370 mm/slub.c:2655 new_slab mm/slub.c:2709 [inline] ___slab_alloc+0xbeb/0x1410 mm/slub.c:3891 __slab_alloc mm/slub.c:3981 [inline] __slab_alloc_node mm/slub.c:4056 [inline] slab_alloc_node mm/slub.c:4217 [inline] kmem_cache_alloc_noprof+0x283/0x3c0 mm/slub.c:4236 gfs2_glock_get+0x263/0xec0 fs/gfs2/glock.c:1182 gfs2_inode_lookup+0x215/0xb10 fs/gfs2/inode.c:135 gfs2_lookup_root fs/gfs2/ops_fstype.c:425 [inline] init_sb+0xa30/0x12c0 fs/gfs2/ops_fstype.c:494 gfs2_fill_super+0x15ef/0x20d0 fs/gfs2/ops_fstype.c:1220 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1692 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1335 vfs_get_tree+0x92/0x2b0 fs/super.c:1815 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808 do_mount fs/namespace.c:4136 [inline] __do_sys_mount fs/namespace.c:4347 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4324 page last free pid 5982 tgid 5981 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2895 stack_depot_save_flags+0x436/0x860 lib/stackdepot.c:727 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_save_track+0x4f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:388 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:405 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_node_noprof+0x234/0x3d0 mm/slub.c:4408 kmalloc_node_noprof include/linux/slab.h:928 [inline] alloc_worker kernel/workqueue.c:2645 [inline] init_rescuer+0x176/0x570 kernel/workqueue.c:5565 __alloc_workqueue+0x176b/0x1b70 kernel/workqueue.c:5745 alloc_workqueue_noprof+0xd4/0x210 kernel/workqueue.c:5786 gfs2_fill_super+0x1377/0x20d0 fs/gfs2/ops_fstype.c:1201 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1692 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1335 vfs_get_tree+0x92/0x2b0 fs/super.c:1815 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808 do_mount fs/namespace.c:4136 [inline] __do_sys_mount fs/namespace.c:4347 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4324 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888053fed280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888053fed300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888053fed380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888053fed400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888053fed480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================