================================================================== 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_unevictable include/linux/pagemap.h:269 [inline] BUG: KASAN: slab-use-after-free in folio_evictable+0xe4/0x250 mm/internal.h:480 Read of size 8 at addr ffff8880516f53a0 by task kswapd1/82 CPU: 0 UID: 0 PID: 82 Comm: kswapd1 Not tainted 6.15.0-rc4-syzkaller-00052-g4f79eaa2ceac #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:408 [inline] print_report+0xb4/0x290 mm/kasan/report.c:521 kasan_report+0x118/0x150 mm/kasan/report.c:634 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x29a/0x2b0 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_unevictable include/linux/pagemap.h:269 [inline] folio_evictable+0xe4/0x250 mm/internal.h:480 sort_folio mm/vmscan.c:4436 [inline] scan_folios mm/vmscan.c:4562 [inline] isolate_folios mm/vmscan.c:4657 [inline] evict_folios+0x1945/0x5110 mm/vmscan.c:4686 try_to_shrink_lruvec+0x705/0x990 mm/vmscan.c:4859 shrink_one+0x21b/0x7c0 mm/vmscan.c:4904 shrink_many mm/vmscan.c:4967 [inline] lru_gen_shrink_node mm/vmscan.c:5045 [inline] shrink_node+0x3139/0x3750 mm/vmscan.c:6016 kswapd_shrink_node mm/vmscan.c:6867 [inline] balance_pgdat mm/vmscan.c:7050 [inline] kswapd+0x1675/0x2970 mm/vmscan.c:7315 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 5310: 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:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4161 [inline] slab_alloc_node mm/slub.c:4210 [inline] kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4217 gfs2_glock_get+0x25b/0xef0 fs/gfs2/glock.c:1184 gfs2_inode_lookup+0x215/0xb10 fs/gfs2/inode.c:135 gfs2_dir_search+0x168/0x220 fs/gfs2/dir.c:1667 gfs2_lookupi+0x3d9/0x5a0 fs/gfs2/inode.c:340 gfs2_jindex_hold fs/gfs2/ops_fstype.c:587 [inline] init_journal+0x54a/0x2260 fs/gfs2/ops_fstype.c:729 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:864 gfs2_fill_super+0x18a3/0x2050 fs/gfs2/ops_fstype.c:1249 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1636 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1330 vfs_get_tree+0x8f/0x2b0 fs/super.c:1759 do_new_mount+0x24a/0xa40 fs/namespace.c:3884 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4412 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 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:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2398 [inline] slab_free mm/slub.c:4656 [inline] kmem_cache_free+0x192/0x3f0 mm/slub.c:4758 rcu_do_batch kernel/rcu/tree.c:2568 [inline] rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2824 handle_softirqs+0x283/0x870 kernel/softirq.c:579 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:164 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 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+0xbc/0xd0 mm/kasan/generic.c:548 __call_rcu_common kernel/rcu/tree.c:3082 [inline] call_rcu+0x142/0x990 kernel/rcu/tree.c:3202 __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:1257 [inline] gfs2_evict_inode+0xaf6/0x1320 fs/gfs2/super.c:1536 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:846 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:864 gfs2_fill_super+0x18a3/0x2050 fs/gfs2/ops_fstype.c:1249 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1636 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1330 vfs_get_tree+0x8f/0x2b0 fs/super.c:1759 do_new_mount+0x24a/0xa40 fs/namespace.c:3884 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4412 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 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+0xbc/0xd0 mm/kasan/generic.c:548 insert_work+0x3d/0x330 kernel/workqueue.c:2183 __queue_work+0xcfc/0xfe0 kernel/workqueue.c:2341 queue_delayed_work_on+0x18b/0x280 kernel/workqueue.c:2561 queue_delayed_work include/linux/workqueue.h:677 [inline] gfs2_glock_queue_work fs/gfs2/glock.c:250 [inline] do_xmote+0xce0/0x1220 fs/gfs2/glock.c:839 glock_work_func+0x2a8/0x580 fs/gfs2/glock.c:1096 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff8880516f4fd8 which belongs to the cache gfs2_glock(aspace) of size 1224 The buggy address is located 968 bytes inside of freed 1224-byte region [ffff8880516f4fd8, ffff8880516f54a0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x516f4 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 ffff88801ed22500 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 head: 04fff00000000040 ffff88801ed22500 dead000000000122 0000000000000000 head: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 head: 04fff00000000002 ffffea000145bd01 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 5310, tgid 5308 (syz.0.0), ts 68802605880, free_ts 68802455445 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1718 prep_new_page mm/page_alloc.c:1726 [inline] get_page_from_freelist+0x21ce/0x22b0 mm/page_alloc.c:3688 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4970 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2301 alloc_slab_page mm/slub.c:2468 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2632 new_slab mm/slub.c:2686 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3872 __slab_alloc mm/slub.c:3962 [inline] __slab_alloc_node mm/slub.c:4037 [inline] slab_alloc_node mm/slub.c:4198 [inline] kmem_cache_alloc_noprof+0x283/0x3c0 mm/slub.c:4217 gfs2_glock_get+0x25b/0xef0 fs/gfs2/glock.c:1184 gfs2_inode_lookup+0x215/0xb10 fs/gfs2/inode.c:135 gfs2_lookup_root fs/gfs2/ops_fstype.c:440 [inline] init_sb+0xa1d/0x12a0 fs/gfs2/ops_fstype.c:507 gfs2_fill_super+0x1569/0x2050 fs/gfs2/ops_fstype.c:1216 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1636 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1330 vfs_get_tree+0x8f/0x2b0 fs/super.c:1759 do_new_mount+0x24a/0xa40 fs/namespace.c:3884 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4412 page last free pid 5310 tgid 5308 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1262 [inline] __free_frozen_pages+0xb0e/0xcd0 mm/page_alloc.c:2725 stack_depot_save_flags+0x447/0x910 lib/stackdepot.c:678 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_save_track+0x4f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4161 [inline] slab_alloc_node mm/slub.c:4210 [inline] kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4217 lsm_inode_alloc security/security.c:755 [inline] security_inode_alloc+0x39/0x330 security/security.c:1697 inode_init_always_gfp+0x9ed/0xdc0 fs/inode.c:306 inode_init_always include/linux/fs.h:3226 [inline] alloc_inode+0x82/0x1b0 fs/inode.c:353 iget5_locked+0x4a/0xa0 fs/inode.c:1356 gfs2_inode_lookup+0xd8/0xb10 fs/gfs2/inode.c:124 gfs2_lookup_root fs/gfs2/ops_fstype.c:440 [inline] init_sb+0xa1d/0x12a0 fs/gfs2/ops_fstype.c:507 gfs2_fill_super+0x1569/0x2050 fs/gfs2/ops_fstype.c:1216 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1636 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1330 vfs_get_tree+0x8f/0x2b0 fs/super.c:1759 do_new_mount+0x24a/0xa40 fs/namespace.c:3884 Memory state around the buggy address: ffff8880516f5280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880516f5300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880516f5380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880516f5400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880516f5480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================