================================================================== 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:270 [inline] BUG: KASAN: slab-use-after-free in folio_evictable+0xe4/0x250 mm/internal.h:478 Read of size 8 at addr ffff888058c413a0 by task syz-executor/5749 CPU: 0 UID: 0 PID: 5749 Comm: syz-executor Not tainted 6.16.0-rc2-syzkaller-g5c8013ae2e86 #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+0xd2/0x2b0 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+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_unevictable include/linux/pagemap.h:270 [inline] folio_evictable+0xe4/0x250 mm/internal.h:478 sort_folio mm/vmscan.c:4469 [inline] scan_folios mm/vmscan.c:4595 [inline] isolate_folios mm/vmscan.c:4690 [inline] evict_folios+0x1acd/0x5500 mm/vmscan.c:4719 try_to_shrink_lruvec+0x705/0x990 mm/vmscan.c:4892 shrink_one+0x21b/0x7c0 mm/vmscan.c:4937 shrink_many mm/vmscan.c:5000 [inline] lru_gen_shrink_node mm/vmscan.c:5078 [inline] shrink_node+0x314e/0x3760 mm/vmscan.c:6060 shrink_zones mm/vmscan.c:6318 [inline] do_try_to_free_pages+0x66b/0x1960 mm/vmscan.c:6380 try_to_free_pages+0x8a2/0xdd0 mm/vmscan.c:6626 __perform_reclaim mm/page_alloc.c:4121 [inline] __alloc_pages_direct_reclaim+0x144/0x300 mm/page_alloc.c:4143 __alloc_pages_slowpath+0x5ff/0xce0 mm/page_alloc.c:4592 __alloc_frozen_pages_noprof+0x319/0x370 mm/page_alloc.c:4972 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_frozen_pages_noprof mm/mempolicy.c:2490 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2510 get_free_pages_noprof+0xf/0x80 mm/page_alloc.c:5018 poll_get_entry fs/select.c:168 [inline] __pollwait+0x27b/0x460 fs/select.c:223 poll_wait include/linux/poll.h:45 [inline] pipe_poll+0xdd/0x470 fs/pipe.c:674 vfs_poll include/linux/poll.h:82 [inline] select_poll_one fs/select.c:480 [inline] do_select+0x105b/0x17e0 fs/select.c:536 core_sys_select+0x6dd/0xa20 fs/select.c:677 do_pselect fs/select.c:759 [inline] __do_sys_pselect6 fs/select.c:802 [inline] __se_sys_pselect6+0x27a/0x300 fs/select.c:793 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 RIP: 0033:0x7fc38bb85adc Code: 29 44 24 30 80 3d 7b 6a 1c 00 00 4c 89 4c 24 40 4c 8d 4c 24 40 48 c7 44 24 48 08 00 00 00 74 2e 4c 89 ea b8 0e 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7c 48 8b 54 24 58 64 48 2b 14 25 28 00 00 00 RSP: 002b:00007ffde95585e0 EFLAGS: 00000202 ORIG_RAX: 000000000000010e RAX: ffffffffffffffda RBX: 00007ffde9558710 RCX: 00007fc38bb85adc RDX: 0000000000000000 RSI: 00007ffde9558710 RDI: 000000000000002a RBP: 00007ffde9558950 R08: 00007ffde9558610 R09: 00007ffde9558620 R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffde95589b0 R13: 0000000000000000 R14: 00007ffde9558b60 R15: 00007ffde95587a0 Allocated by task 6238: 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:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204 gfs2_glock_get+0x263/0xec0 fs/gfs2/glock.c:1183 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_lookup_meta+0xa7/0x170 fs/gfs2/inode.c:280 init_journal+0x19f/0x2260 fs/gfs2/ops_fstype.c:708 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:851 gfs2_fill_super+0x1939/0x20e0 fs/gfs2/ops_fstype.c:1253 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1681 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1335 vfs_get_tree+0x8f/0x2b0 fs/super.c:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3885 do_mount fs/namespace.c:4222 [inline] __do_sys_mount fs/namespace.c:4433 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4410 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: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:2381 [inline] slab_free mm/slub.c:4643 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4745 rcu_do_batch kernel/rcu/tree.c:2576 [inline] rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2832 handle_softirqs+0x286/0x870 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+0x3f9/0x770 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:3090 [inline] call_rcu+0x142/0x990 kernel/rcu/tree.c:3210 __gfs2_glock_free+0xb44/0xc90 fs/gfs2/glock.c:172 gfs2_glock_free+0x3c/0xa0 fs/gfs2/glock.c:178 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 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: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+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3f9/0x770 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 ffff888058c40fd8 which belongs to the cache gfs2_glock(aspace) of size 1224 The buggy address is located 968 bytes inside of freed 1224-byte region [ffff888058c40fd8, ffff888058c414a0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x58c40 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 ffff88801c52c640 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 head: 04fff00000000040 ffff88801c52c640 dead000000000122 0000000000000000 head: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 head: 04fff00000000002 ffffea0001631001 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 6204, tgid 6202 (syz.0.16), ts 184870044075, free_ts 168258045000 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2451 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2619 new_slab mm/slub.c:2673 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859 __slab_alloc mm/slub.c:3949 [inline] __slab_alloc_node mm/slub.c:4024 [inline] slab_alloc_node mm/slub.c:4185 [inline] kmem_cache_alloc_noprof+0x283/0x3c0 mm/slub.c:4204 gfs2_glock_get+0x263/0xec0 fs/gfs2/glock.c:1183 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+0x1605/0x20e0 fs/gfs2/ops_fstype.c:1220 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1681 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1335 vfs_get_tree+0x8f/0x2b0 fs/super.c:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3885 do_mount fs/namespace.c:4222 [inline] __do_sys_mount fs/namespace.c:4433 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4410 page last free pid 9 tgid 9 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706 kasan_depopulate_vmalloc_pte+0x74/0xa0 mm/kasan/shadow.c:472 apply_to_pte_range mm/memory.c:3032 [inline] apply_to_pmd_range mm/memory.c:3076 [inline] apply_to_pud_range mm/memory.c:3112 [inline] apply_to_p4d_range mm/memory.c:3148 [inline] __apply_to_page_range+0xb92/0x1380 mm/memory.c:3184 kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:593 kasan_release_vmalloc_node mm/vmalloc.c:2241 [inline] purge_vmap_node+0x214/0x8f0 mm/vmalloc.c:2258 __purge_vmap_area_lazy+0x7a4/0xb40 mm/vmalloc.c:2348 drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2382 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff888058c41280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888058c41300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888058c41380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888058c41400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888058c41480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================