gfs2: fsid=syz:syz.0: can't create logd thread: -4 ================================================================== BUG: KASAN: slab-use-after-free in workqueue_sysfs_unregister kernel/workqueue.c:7385 [inline] BUG: KASAN: slab-use-after-free in destroy_workqueue+0x41/0xc40 kernel/workqueue.c:5780 Read of size 8 at addr ffff88802a849128 by task syz-executor.0/6100 CPU: 1 UID: 0 PID: 6100 Comm: syz-executor.0 Not tainted 6.10.0-rc4-next-20240621-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 workqueue_sysfs_unregister kernel/workqueue.c:7385 [inline] destroy_workqueue+0x41/0xc40 kernel/workqueue.c:5780 gfs2_fill_super+0x12a4/0x2520 fs/gfs2/ops_fstype.c:1311 get_tree_bdev+0x3f7/0x570 fs/super.c:1624 gfs2_get_tree+0x54/0x220 fs/gfs2/ops_fstype.c:1330 vfs_get_tree+0x90/0x2a0 fs/super.c:1789 do_new_mount+0x2be/0xb40 fs/namespace.c:3379 do_mount fs/namespace.c:3719 [inline] __do_sys_mount fs/namespace.c:3925 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3902 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f88c6a7e7aa Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f88c65feef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f88c65fef80 RCX: 00007f88c6a7e7aa RDX: 00000000200124c0 RSI: 0000000020012500 RDI: 00007f88c65fef40 RBP: 00000000200124c0 R08: 00007f88c65fef80 R09: 0000000000000400 R10: 0000000000000400 R11: 0000000000000202 R12: 0000000020012500 R13: 00007f88c65fef40 R14: 00000000000124ab R15: 0000000020000240 Allocated by task 6100: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4158 [inline] __kmalloc_noprof+0x1f9/0x400 mm/slub.c:4171 kmalloc_noprof include/linux/slab.h:664 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] alloc_workqueue+0x1b0/0x2040 kernel/workqueue.c:5657 gfs2_fill_super+0x1163/0x2520 fs/gfs2/ops_fstype.c:1192 get_tree_bdev+0x3f7/0x570 fs/super.c:1624 gfs2_get_tree+0x54/0x220 fs/gfs2/ops_fstype.c:1330 vfs_get_tree+0x90/0x2a0 fs/super.c:1789 do_new_mount+0x2be/0xb40 fs/namespace.c:3379 do_mount fs/namespace.c:3719 [inline] __do_sys_mount fs/namespace.c:3925 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3902 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 0: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2231 [inline] slab_free mm/slub.c:4473 [inline] kfree+0x149/0x360 mm/slub.c:4594 rcu_do_batch kernel/rcu/tree.c:2542 [inline] rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2798 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 __call_rcu_common kernel/rcu/tree.c:3061 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3165 kthread_worker_fn+0x500/0xaf0 kernel/kthread.c:842 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the object at ffff88802a849000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 296 bytes inside of freed 512-byte region [ffff88802a849000, ffff88802a849200) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2a848 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff888015041c80 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000100010 00000001ffffefff 0000000000000000 head: 00fff00000000040 ffff888015041c80 0000000000000000 dead000000000001 head: 0000000000000000 0000000000100010 00000001ffffefff 0000000000000000 head: 00fff00000000002 ffffea0000aa1201 ffffffffffffffff 0000000000000000 head: ffff888000000004 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4546, tgid 4546 (udevd), ts 44058826825, free_ts 41372418094 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1500 prep_new_page mm/page_alloc.c:1508 [inline] get_page_from_freelist+0x2ccb/0x2d80 mm/page_alloc.c:3487 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4745 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2300 allocate_slab+0x5a/0x2f0 mm/slub.c:2463 new_slab mm/slub.c:2516 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3702 __slab_alloc+0x58/0xa0 mm/slub.c:3792 __slab_alloc_node mm/slub.c:3845 [inline] slab_alloc_node mm/slub.c:4025 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4184 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] kernfs_fop_open+0x3e0/0xd10 fs/kernfs/file.c:623 do_dentry_open+0x970/0x1450 fs/open.c:959 vfs_open+0x3e/0x330 fs/open.c:1090 do_open fs/namei.c:3665 [inline] path_openat+0x2b58/0x35e0 fs/namei.c:3824 do_filp_open+0x235/0x490 fs/namei.c:3851 do_sys_openat2+0x13e/0x1d0 fs/open.c:1417 do_sys_open fs/open.c:1432 [inline] __do_sys_openat fs/open.c:1448 [inline] __se_sys_openat fs/open.c:1443 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1443 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 page last free pid 4556 tgid 4556 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1093 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2651 __slab_free+0x31b/0x3d0 mm/slub.c:4384 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3975 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4044 getname_flags+0xb7/0x540 fs/namei.c:139 vfs_fstatat+0x116/0x190 fs/stat.c:303 __do_sys_newfstatat fs/stat.c:468 [inline] __se_sys_newfstatat fs/stat.c:462 [inline] __x64_sys_newfstatat+0x125/0x1b0 fs/stat.c:462 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88802a849000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802a849080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802a849100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802a849180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802a849200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================