================================================================== BUG: KASAN: use-after-free in __ext4_iget+0x3a0/0x41f0 fs/ext4/inode.c:4766 Read of size 8 at addr ffff888137dfd268 by task syz.6.6297/21835 CPU: 0 PID: 21835 Comm: syz.6.6297 Not tainted 5.10.231-syzkaller-00700-g4055d754db6f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:452 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 __ext4_iget+0x3a0/0x41f0 fs/ext4/inode.c:4766 ext4_quota_enable fs/ext4/super.c:6423 [inline] ext4_enable_quotas+0x56f/0x9f0 fs/ext4/super.c:6459 ext4_fill_super+0x86dc/0x9150 fs/ext4/super.c:5060 mount_bdev+0x262/0x370 fs/super.c:1442 ext4_mount+0x34/0x40 fs/ext4/super.c:6638 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593 vfs_get_tree+0x88/0x290 fs/super.c:1572 do_new_mount+0x2ba/0xb30 fs/namespace.c:2917 path_mount+0x56f/0xcb0 fs/namespace.c:3247 do_mount fs/namespace.c:3260 [inline] __do_sys_mount fs/namespace.c:3468 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3445 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3445 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fc4d92f84ca Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc4d7967e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fc4d7967ef0 RCX: 00007fc4d92f84ca RDX: 0000000020000080 RSI: 0000000020000840 RDI: 00007fc4d7967eb0 RBP: 0000000020000080 R08: 00007fc4d7967ef0 R09: 0000000000000002 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000020000840 R13: 00007fc4d7967eb0 R14: 00000000000004e0 R15: 0000000020000940 Allocated by task 21259: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:430 [inline] __kasan_slab_alloc+0xb1/0xe0 mm/kasan/common.c:463 kasan_slab_alloc include/linux/kasan.h:244 [inline] slab_post_alloc_hook+0x61/0x2f0 mm/slab.h:583 slab_alloc_node mm/slub.c:2947 [inline] slab_alloc mm/slub.c:2955 [inline] kmem_cache_alloc+0x168/0x2e0 mm/slub.c:2960 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2779 [inline] f2fs_alloc_inode+0x26/0x420 fs/f2fs/super.c:1373 alloc_inode fs/inode.c:233 [inline] iget_locked+0x14f/0x870 fs/inode.c:1275 f2fs_iget+0x55/0x50a0 fs/f2fs/inode.c:498 f2fs_fill_super+0x63b6/0x7d90 fs/f2fs/super.c:4301 mount_bdev+0x262/0x370 fs/super.c:1442 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4548 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593 vfs_get_tree+0x88/0x290 fs/super.c:1572 do_new_mount+0x2ba/0xb30 fs/namespace.c:2917 path_mount+0x56f/0xcb0 fs/namespace.c:3247 do_mount fs/namespace.c:3260 [inline] __do_sys_mount fs/namespace.c:3468 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3445 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3445 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu kernel/rcu/tree.c:2976 [inline] call_rcu+0x135/0x11f0 kernel/rcu/tree.c:3050 destroy_inode fs/inode.c:288 [inline] evict+0x8e8/0x9c0 fs/inode.c:629 iput_final fs/inode.c:1736 [inline] iput+0x632/0x7e0 fs/inode.c:1762 f2fs_fill_super+0x66c7/0x7d90 fs/f2fs/super.c:4484 mount_bdev+0x262/0x370 fs/super.c:1442 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4548 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593 vfs_get_tree+0x88/0x290 fs/super.c:1572 do_new_mount+0x2ba/0xb30 fs/namespace.c:2917 path_mount+0x56f/0xcb0 fs/namespace.c:3247 do_mount fs/namespace.c:3260 [inline] __do_sys_mount fs/namespace.c:3468 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3445 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3445 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu kernel/rcu/tree.c:2976 [inline] call_rcu+0x135/0x11f0 kernel/rcu/tree.c:3050 destroy_inode fs/inode.c:288 [inline] evict+0x8e8/0x9c0 fs/inode.c:629 iput_final fs/inode.c:1736 [inline] iput+0x632/0x7e0 fs/inode.c:1762 dentry_unlink_inode+0x2ea/0x3d0 fs/dcache.c:378 __dentry_kill+0x447/0x650 fs/dcache.c:583 dentry_kill+0xc0/0x2a0 dput+0x40/0x80 fs/dcache.c:883 ovl_check_rename_whiteout fs/overlayfs/super.c:1254 [inline] ovl_make_workdir fs/overlayfs/super.c:1356 [inline] ovl_get_workdir+0x845/0xe60 fs/overlayfs/super.c:1458 ovl_fill_super+0x1968/0x26d0 fs/overlayfs/super.c:1998 mount_nodev+0x57/0xf0 fs/super.c:1488 ovl_mount+0x2c/0x40 fs/overlayfs/super.c:2082 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593 vfs_get_tree+0x88/0x290 fs/super.c:1572 do_new_mount+0x2ba/0xb30 fs/namespace.c:2917 path_mount+0x56f/0xcb0 fs/namespace.c:3247 do_mount fs/namespace.c:3260 [inline] __do_sys_mount fs/namespace.c:3468 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3445 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3445 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff888137dfcd40 which belongs to the cache f2fs_inode_cache of size 1520 The buggy address is located 1320 bytes inside of 1520-byte region [ffff888137dfcd40, ffff888137dfd330) The buggy address belongs to the page: page:ffffea0004df7e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888137dfb380 pfn:0x137df8 head:ffffea0004df7e00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head) raw: 4000000000010200 ffffea0004dff200 0000000400000004 ffff8881029ce480 raw: ffff888137dfb380 0000000080130009 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 17866, ts 826306537457, free_ts 769174956127 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2456 [inline] prep_new_page+0x166/0x180 mm/page_alloc.c:2462 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348 allocate_slab mm/slub.c:1808 [inline] new_slab+0x80/0x400 mm/slub.c:1869 new_slab_objects mm/slub.c:2627 [inline] ___slab_alloc+0x302/0x4b0 mm/slub.c:2791 __slab_alloc+0x63/0xa0 mm/slub.c:2831 slab_alloc_node mm/slub.c:2913 [inline] slab_alloc mm/slub.c:2955 [inline] kmem_cache_alloc+0x1b9/0x2e0 mm/slub.c:2960 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2779 [inline] f2fs_alloc_inode+0x26/0x420 fs/f2fs/super.c:1373 alloc_inode fs/inode.c:233 [inline] new_inode_pseudo+0x64/0x220 fs/inode.c:968 new_inode+0x28/0x1c0 fs/inode.c:997 f2fs_new_inode+0x126/0x14d0 fs/f2fs/namei.c:35 __f2fs_tmpfile+0x109/0x4c0 fs/f2fs/namei.c:853 f2fs_tmpfile+0x148/0x520 fs/f2fs/namei.c:916 vfs_tmpfile+0x1e4/0x2b0 fs/namei.c:3424 ovl_do_tmpfile fs/overlayfs/overlayfs.h:236 [inline] ovl_make_workdir fs/overlayfs/super.c:1347 [inline] ovl_get_workdir+0x562/0xe60 fs/overlayfs/super.c:1458 ovl_fill_super+0x1968/0x26d0 fs/overlayfs/super.c:1998 page last free stack trace: reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1349 [inline] free_pcp_prepare mm/page_alloc.c:1421 [inline] free_unref_page_prepare+0x2ae/0x2d0 mm/page_alloc.c:3336 free_unref_page mm/page_alloc.c:3391 [inline] free_the_page+0x9e/0x370 mm/page_alloc.c:5407 __free_pages+0x67/0xc0 mm/page_alloc.c:5418 __free_slab+0xcf/0x190 mm/slub.c:1894 free_slab mm/slub.c:1909 [inline] discard_slab mm/slub.c:1915 [inline] unfreeze_partials+0x15e/0x190 mm/slub.c:2410 put_cpu_partial+0xbf/0x180 mm/slub.c:2446 __slab_free+0x2c8/0x3a0 mm/slub.c:3095 do_slab_free mm/slub.c:3191 [inline] ___cache_free+0x111/0x130 mm/slub.c:3210 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x47/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:283 ____kasan_kmalloc+0x2f/0x110 mm/kasan/common.c:475 __kasan_krealloc+0x8e/0xd0 mm/kasan/common.c:577 kasan_krealloc include/linux/kasan.h:274 [inline] __do_krealloc mm/slab_common.c:1099 [inline] krealloc+0xca/0x110 mm/slab_common.c:1136 push_jmp_history kernel/bpf/verifier.c:1787 [inline] is_state_visited kernel/bpf/verifier.c:9909 [inline] do_check+0x2491/0xe8c0 kernel/bpf/verifier.c:10053 do_check_common+0x946/0x1370 kernel/bpf/verifier.c:12044 Memory state around the buggy address: ffff888137dfd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888137dfd180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888137dfd200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888137dfd280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888137dfd300: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc ================================================================== EXT4-fs warning (device loop6): ext4_enable_quotas:6467: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix. EXT4-fs (loop6): mount failed tipc: Enabling of bearer rejected, already enabled