gfs2: fsid=syz:syz.0: jid=0, already locked for use gfs2: fsid=syz:syz.0: jid=0: Looking at journal... gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 38ms gfs2: fsid=syz:syz.0: jid=0: Done ================================================================== BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0x92/0x190 lib/list_debug.c:62 Read of size 8 at addr ffff888052447920 by task kworker/0:5/5294 CPU: 0 UID: 0 PID: 5294 Comm: kworker/0:5 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 gfs2_withdraw_func Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 __list_del_entry_valid_or_report+0x92/0x190 lib/list_debug.c:62 __list_del_entry_valid include/linux/list.h:140 [inline] __list_del_entry include/linux/list.h:254 [inline] list_del_init include/linux/list.h:326 [inline] gfs2_remove_from_ail fs/gfs2/log.c:79 [inline] gfs2_ail_empty_tr fs/gfs2/log.c:287 [inline] gfs2_ail_drain+0x1be/0xb20 fs/gfs2/log.c:946 do_withdraw+0x10d/0x2f0 fs/gfs2/util.c:126 gfs2_withdraw_func+0x2ef/0x440 fs/gfs2/util.c:-1 process_one_work kernel/workqueue.c:3387 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 5314: 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:4586 [inline] slab_alloc_node mm/slub.c:4919 [inline] kmem_cache_alloc_noprof+0x2a4/0x5f0 mm/slub.c:4933 gfs2_glock_get+0x276/0xf20 fs/gfs2/glock.c:1074 gfs2_create_inode+0xdc6/0x1710 fs/gfs2/inode.c:835 gfs2_atomic_open+0x116/0x200 fs/gfs2/inode.c:1403 atomic_open+0x199/0x550 fs/namei.c:4367 lookup_open+0x925/0x1a40 fs/namei.c:4522 open_last_lookups fs/namei.c:4767 [inline] path_openat+0x677/0x1d60 fs/namei.c:4997 do_file_open+0x23e/0x4a0 fs/namei.c:5029 do_sys_openat2+0x115/0x200 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_open fs/open.c:1431 [inline] __se_sys_open fs/open.c:1427 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1427 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 15: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x40/0x50 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:2678 [inline] slab_free mm/slub.c:6372 [inline] kmem_cache_free+0x182/0x650 mm/slub.c:6499 rcu_do_batch kernel/rcu/tree.c:2645 [inline] rcu_core+0x794/0x10b0 kernel/rcu/tree.c:2897 handle_softirqs+0x226/0x860 kernel/softirq.c:645 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1108 smpboot_thread_fn+0x565/0xa70 kernel/smpboot.c:160 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 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:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 __call_rcu_common kernel/rcu/tree.c:3159 [inline] call_rcu+0xee/0x8b0 kernel/rcu/tree.c:3279 gfs2_glock_free+0x3c/0xa0 fs/gfs2/glock.c:150 process_one_work kernel/workqueue.c:3387 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 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:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 insert_work+0x3d/0x330 kernel/workqueue.c:2272 __queue_work+0xd07/0x10d0 kernel/workqueue.c:2448 queue_delayed_work_on+0x11a/0x1e0 kernel/workqueue.c:2669 queue_delayed_work include/linux/workqueue.h:714 [inline] gfs2_glock_queue_work fs/gfs2/glock.c:198 [inline] do_xmote+0x539/0x770 fs/gfs2/glock.c:718 glock_work_func+0x30d/0x610 fs/gfs2/glock.c:987 process_one_work kernel/workqueue.c:3387 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff888052447808 which belongs to the cache gfs2_glock(aspace) of size 1176 The buggy address is located 280 bytes inside of freed 1176-byte region [ffff888052447808, ffff888052447ca0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x52444 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 ffff888031e06780 dead000000000122 0000000000000000 raw: 0000000000000000 00000008000c000c 00000000f5000000 0000000000000000 head: 04fff00000000040 ffff888031e06780 dead000000000122 0000000000000000 head: 0000000000000000 00000008000c000c 00000000f5000000 0000000000000000 head: 04fff00000000002 ffffffffffffff01 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 5314, tgid 5313 (syz.0.0), ts 95404298353 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871 prep_new_page mm/page_alloc.c:1879 [inline] get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943 __alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436 alloc_slab_page mm/slub.c:3267 [inline] allocate_slab+0x7c/0x5e0 mm/slub.c:3382 new_slab mm/slub.c:3428 [inline] refill_objects+0x2d5/0x350 mm/slub.c:7305 refill_sheaf mm/slub.c:2805 [inline] __pcs_replace_empty_main+0x2c3/0x6b0 mm/slub.c:4677 alloc_from_pcs mm/slub.c:4775 [inline] slab_alloc_node mm/slub.c:4907 [inline] kmem_cache_alloc_noprof+0x386/0x5f0 mm/slub.c:4933 gfs2_glock_get+0x276/0xf20 fs/gfs2/glock.c:1074 gfs2_create_inode+0xdc6/0x1710 fs/gfs2/inode.c:835 gfs2_atomic_open+0x116/0x200 fs/gfs2/inode.c:1403 atomic_open+0x199/0x550 fs/namei.c:4367 lookup_open+0x925/0x1a40 fs/namei.c:4522 open_last_lookups fs/namei.c:4767 [inline] path_openat+0x677/0x1d60 fs/namei.c:4997 do_file_open+0x23e/0x4a0 fs/namei.c:5029 do_sys_openat2+0x115/0x200 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_open fs/open.c:1431 [inline] __se_sys_open fs/open.c:1427 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1427 page last free pid 5314 tgid 5313 ts 95402403288 stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1418 [inline] __free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962 stack_depot_save_flags+0x41e/0x7f0 lib/stackdepot.c:735 kasan_save_stack mm/kasan/common.c:58 [inline] kasan_save_track+0x4f/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x331/0x660 mm/slub.c:5484 _kmalloc_noprof include/linux/slab.h:988 [inline] _kzalloc_noprof include/linux/slab.h:1309 [inline] gfs2_open_common+0xb9/0x350 fs/gfs2/file.c:640 gfs2_open+0x167/0x1f0 fs/gfs2/file.c:690 do_dentry_open+0x816/0x1380 fs/open.c:996 vfs_open+0x3b/0x340 fs/open.c:1101 do_open fs/namei.c:4837 [inline] path_openat+0x1443/0x1d60 fs/namei.c:5000 do_file_open+0x23e/0x4a0 fs/namei.c:5029 do_sys_openat2+0x115/0x200 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_creat fs/open.c:1501 [inline] __se_sys_creat fs/open.c:1495 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1495 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888052447800: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888052447880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888052447900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888052447980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888052447a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================