================================================================== BUG: KASAN: slab-use-after-free in xfs_inode_item_push+0x28f/0x2e0 fs/xfs/xfs_inode_item.c:741 Read of size 8 at addr ffff88807a6ece48 by task xfsaild/loop1/27949 CPU: 0 PID: 27949 Comm: xfsaild/loop1 Not tainted 6.4.0-syzkaller-09904-ga507db1d8fdc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 xfs_inode_item_push+0x28f/0x2e0 fs/xfs/xfs_inode_item.c:741 xfsaild_push_item fs/xfs/xfs_trans_ail.c:414 [inline] xfsaild_push fs/xfs/xfs_trans_ail.c:486 [inline] xfsaild+0xc70/0x25d0 fs/xfs/xfs_trans_ail.c:671 kthread+0x2b8/0x350 kernel/kthread.c:389 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 27924: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:750 slab_alloc_node mm/slub.c:3470 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x123/0x300 mm/slub.c:3494 kmem_cache_zalloc include/linux/slab.h:690 [inline] xfs_inode_item_init+0x33/0xc0 fs/xfs/xfs_inode_item.c:836 xfs_trans_ijoin+0xde/0x120 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_init_new_inode+0xdf4/0x10a0 fs/xfs/xfs_inode.c:902 xfs_create+0x8ce/0x1240 fs/xfs/xfs_inode.c:1023 xfs_generic_create+0x491/0xd70 fs/xfs/xfs_iops.c:199 vfs_mkdir+0x29d/0x450 fs/namei.c:4117 do_mkdirat+0x264/0x520 fs/namei.c:4140 __do_sys_mkdirat fs/namei.c:4155 [inline] __se_sys_mkdirat fs/namei.c:4153 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4153 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 15423: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:521 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1792 [inline] slab_free_freelist_hook mm/slub.c:1818 [inline] slab_free mm/slub.c:3801 [inline] kmem_cache_free+0x292/0x500 mm/slub.c:3823 xfs_inode_free_callback+0x152/0x1d0 fs/xfs/xfs_icache.c:145 rcu_do_batch kernel/rcu/tree.c:2135 [inline] rcu_core+0xaaa/0x1740 kernel/rcu/tree.c:2399 __do_softirq+0x2ab/0x908 kernel/softirq.c:553 The buggy address belongs to the object at ffff88807a6ece18 which belongs to the cache xfs_ili of size 264 The buggy address is located 48 bytes inside of freed 264-byte region [ffff88807a6ece18, ffff88807a6ecf20) The buggy address belongs to the physical page: page:ffffea0001e9bb00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807a6ec3d8 pfn:0x7a6ec flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000200 ffff8881452e1140 ffffea0001f2c600 0000000000000006 raw: ffff88807a6ec3d8 00000000800c000a 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x112c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 19709, tgid 19707 (syz-executor.4), ts 818934515917, free_ts 818589968725 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0x31e8/0x3370 mm/page_alloc.c:3221 __alloc_pages+0x255/0x670 mm/page_alloc.c:4477 alloc_slab_page+0x6a/0x160 mm/slub.c:1862 allocate_slab mm/slub.c:2009 [inline] new_slab+0x84/0x2f0 mm/slub.c:2062 ___slab_alloc+0xade/0x1100 mm/slub.c:3215 __slab_alloc mm/slub.c:3314 [inline] __slab_alloc_node mm/slub.c:3367 [inline] slab_alloc_node mm/slub.c:3460 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x1bf/0x300 mm/slub.c:3494 kmem_cache_zalloc include/linux/slab.h:690 [inline] xfs_inode_item_init+0x33/0xc0 fs/xfs/xfs_inode_item.c:836 xfs_trans_ijoin+0xde/0x120 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_create+0x921/0x1240 fs/xfs/xfs_inode.c:1035 xfs_generic_create+0x491/0xd70 fs/xfs/xfs_iops.c:199 vfs_mkdir+0x29d/0x450 fs/namei.c:4117 do_mkdirat+0x264/0x520 fs/namei.c:4140 __do_sys_mkdir fs/namei.c:4160 [inline] __se_sys_mkdir fs/namei.c:4158 [inline] __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4158 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1161 [inline] free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2348 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2443 __slab_free+0x2f6/0x390 mm/slub.c:3707 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:750 slab_alloc_node mm/slub.c:3470 [inline] __kmem_cache_alloc_node+0x141/0x270 mm/slub.c:3509 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1076 kmalloc include/linux/slab.h:579 [inline] kzalloc include/linux/slab.h:700 [inline] smk_fetch+0x92/0x140 security/smack/smack_lsm.c:291 smack_d_instantiate+0x8d7/0xb40 security/smack/smack_lsm.c:3547 security_d_instantiate+0x9b/0xf0 security/security.c:3760 d_instantiate+0x55/0x90 fs/dcache.c:2034 shmem_symlink+0x5a6/0x750 mm/shmem.c:3327 vfs_symlink+0x12f/0x2a0 fs/namei.c:4477 do_symlinkat+0x201/0x610 fs/namei.c:4503 Memory state around the buggy address: ffff88807a6ecd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807a6ecd80: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc >ffff88807a6ece00: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807a6ece80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807a6ecf00: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================