================================================================== BUG: KASAN: use-after-free in xfs_inode_item_push+0x25e/0x2c0 fs/xfs/xfs_inode_item.c:582 Read of size 8 at addr ffff8880745d7b70 by task xfsaild/loop1/2941 CPU: 1 PID: 2941 Comm: xfsaild/loop1 Not tainted 5.15.112-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 xfs_inode_item_push+0x25e/0x2c0 fs/xfs/xfs_inode_item.c:582 xfsaild_push_item fs/xfs/xfs_trans_ail.c:414 [inline] xfsaild_push fs/xfs/xfs_trans_ail.c:472 [inline] xfsaild+0xd6d/0x2970 fs/xfs/xfs_trans_ail.c:657 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Allocated by task 2900: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:711 [inline] xfs_inode_item_init+0x2f/0xc0 fs/xfs/xfs_inode_item.c:675 xfs_trans_ijoin+0xb6/0xe0 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_init_new_inode+0xd8c/0x1100 fs/xfs/xfs_inode.c:918 xfs_create+0x9b1/0x1370 fs/xfs/xfs_inode.c:1044 xfs_generic_create+0x426/0xd70 fs/xfs/xfs_iops.c:197 lookup_open fs/namei.c:3392 [inline] open_last_lookups fs/namei.c:3462 [inline] path_openat+0x12f6/0x2f20 fs/namei.c:3669 do_filp_open+0x21c/0x460 fs/namei.c:3699 do_sys_openat2+0x13b/0x500 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_open fs/open.c:1235 [inline] __se_sys_open fs/open.c:1231 [inline] __x64_sys_open+0x221/0x270 fs/open.c:1231 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Freed by task 2960: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kmem_cache_free+0x91/0x1f0 mm/slub.c:3515 xfs_inode_free_callback+0x1bd/0x230 fs/xfs/xfs_icache.c:142 rcu_do_batch kernel/rcu/tree.c:2510 [inline] rcu_core+0xa15/0x1650 kernel/rcu/tree.c:2750 __do_softirq+0x3b3/0x93a kernel/softirq.c:558 The buggy address belongs to the object at ffff8880745d7b40 which belongs to the cache xfs_ili of size 256 The buggy address is located 48 bytes inside of 256-byte region [ffff8880745d7b40, ffff8880745d7c40) The buggy address belongs to the page: page:ffffea0001d175c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880745d7780 pfn:0x745d7 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000122 ffff88801942a3c0 raw: ffff8880745d7780 00000000800c0004 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 25782, ts 1029264498396, free_ts 1019792123633 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x18e/0x280 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:711 [inline] xfs_inode_item_init+0x2f/0xc0 fs/xfs/xfs_inode_item.c:675 xfs_trans_ijoin+0xb6/0xe0 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_init_new_inode+0xd8c/0x1100 fs/xfs/xfs_inode.c:918 xfs_create_tmpfile+0x655/0xb60 fs/xfs/xfs_inode.c:1168 xfs_rename_alloc_whiteout fs/xfs/xfs_inode.c:3067 [inline] xfs_rename+0x2c2/0x1f70 fs/xfs/xfs_inode.c:3122 xfs_vn_rename+0x384/0x4d0 fs/xfs/xfs_iops.c:475 vfs_rename+0xd8f/0x1190 fs/namei.c:4736 ovl_do_rename fs/overlayfs/overlayfs.h:234 [inline] ovl_check_rename_whiteout fs/overlayfs/super.c:1290 [inline] ovl_make_workdir fs/overlayfs/super.c:1409 [inline] ovl_get_workdir+0x861/0x1350 fs/overlayfs/super.c:1524 ovl_fill_super+0x1b85/0x2a20 fs/overlayfs/super.c:2080 mount_nodev+0x52/0xe0 fs/super.c:1424 legacy_get_tree+0xeb/0x180 fs/fs_context.c:610 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396 free_slab mm/slub.c:2015 [inline] discard_slab mm/slub.c:2021 [inline] __unfreeze_partials+0x1b7/0x210 mm/slub.c:2507 put_cpu_partial+0x132/0x1a0 mm/slub.c:2587 do_slab_free mm/slub.c:3487 [inline] ___cache_free+0xe3/0x100 mm/slub.c:3506 qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233 getname_flags+0xb8/0x4e0 fs/namei.c:138 do_sys_openat2+0xd2/0x500 fs/open.c:1205 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1238 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Memory state around the buggy address: ffff8880745d7a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880745d7a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880745d7b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ^ ffff8880745d7b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880745d7c00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================