================================================================== BUG: KASAN: use-after-free in __ext4_iget+0x3a0/0x41f0 fs/ext4/inode.c:4755 Read of size 8 at addr ffff888164ab5268 by task syz-executor.3/2709 CPU: 1 PID: 2709 Comm: syz-executor.3 Not tainted 5.10.209-syzkaller-00435-gdd976ecce2ce #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 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:4755 ext4_quota_enable fs/ext4/super.c:6411 [inline] ext4_enable_quotas+0x56f/0x9f0 fs/ext4/super.c:6447 ext4_fill_super+0x86dc/0x9150 fs/ext4/super.c:5060 mount_bdev+0x262/0x370 fs/super.c:1429 ext4_mount+0x34/0x40 fs/ext4/super.c:6626 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593 vfs_get_tree+0x88/0x290 fs/super.c:1559 do_new_mount+0x2ba/0xb30 fs/namespace.c:2910 path_mount+0x56f/0xcb0 fs/namespace.c:3240 do_mount fs/namespace.c:3253 [inline] __do_sys_mount fs/namespace.c:3461 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3438 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3438 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f46ee1ba4aa 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:00007f46ecf39ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f46ecf39f80 RCX: 00007f46ee1ba4aa RDX: 00000000200005c0 RSI: 0000000020000000 RDI: 00007f46ecf39f40 RBP: 00000000200005c0 R08: 00007f46ecf39f80 R09: 0000000000200810 R10: 0000000000200810 R11: 0000000000000202 R12: 0000000020000000 R13: 00007f46ecf39f40 R14: 00000000000004da R15: 0000000020000600 Allocated by task 3927: 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:2776 [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:1236 f2fs_iget+0x55/0x4da0 fs/f2fs/inode.c:489 f2fs_fill_super+0x64c2/0x7e30 fs/f2fs/super.c:4316 mount_bdev+0x262/0x370 fs/super.c:1429 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4555 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593 vfs_get_tree+0x88/0x290 fs/super.c:1559 do_new_mount+0x2ba/0xb30 fs/namespace.c:2910 path_mount+0x56f/0xcb0 fs/namespace.c:3240 do_mount fs/namespace.c:3253 [inline] __do_sys_mount fs/namespace.c:3461 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3438 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3438 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xc6 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+0x648/0x6c0 fs/inode.c:594 dispose_list fs/inode.c:612 [inline] evict_inodes+0x5d1/0x650 fs/inode.c:662 generic_shutdown_super+0x9c/0x2d0 fs/super.c:454 kill_block_super+0x7e/0xe0 fs/super.c:1456 kill_f2fs_super+0x2f9/0x3c0 fs/f2fs/super.c:4587 deactivate_locked_super+0xad/0x110 fs/super.c:335 deactivate_super+0xbe/0xf0 fs/super.c:366 cleanup_mnt+0x45c/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x129/0x190 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] syscall_exit_to_user_mode+0xc5/0x1d0 kernel/entry/common.c:274 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xc6 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+0x648/0x6c0 fs/inode.c:594 iput_final fs/inode.c:1697 [inline] iput+0x632/0x7e0 fs/inode.c:1723 f2fs_put_super+0x641/0xc10 fs/f2fs/super.c:1613 generic_shutdown_super+0x14f/0x2d0 fs/super.c:465 kill_block_super+0x7e/0xe0 fs/super.c:1456 kill_f2fs_super+0x2f9/0x3c0 fs/f2fs/super.c:4587 deactivate_locked_super+0xad/0x110 fs/super.c:335 deactivate_super+0xbe/0xf0 fs/super.c:366 cleanup_mnt+0x45c/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x129/0x190 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] syscall_exit_to_user_mode+0xc5/0x1d0 kernel/entry/common.c:274 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xc6 The buggy address belongs to the object at ffff888164ab4d40 which belongs to the cache f2fs_inode_cache of size 1520 The buggy address is located 1320 bytes inside of 1520-byte region [ffff888164ab4d40, ffff888164ab5330) The buggy address belongs to the page: page:ffffea000592ac00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888164ab0670 pfn:0x164ab0 head:ffffea000592ac00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head) raw: 4000000000010200 0000000000000000 0000000100000001 ffff888102788480 raw: ffff888164ab0670 0000000080130001 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 24123, ts 885918443785, free_ts 884713793023 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:5346 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:2776 [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:1236 f2fs_iget+0x55/0x4da0 fs/f2fs/inode.c:489 f2fs_fill_super+0x64c2/0x7e30 fs/f2fs/super.c:4316 mount_bdev+0x262/0x370 fs/super.c:1429 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4555 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593 vfs_get_tree+0x88/0x290 fs/super.c:1559 do_new_mount+0x2ba/0xb30 fs/namespace.c:2910 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_pages_ok+0x82c/0x850 mm/page_alloc.c:1629 free_the_page+0x76/0x370 mm/page_alloc.c:5407 __free_pages+0x67/0xc0 mm/page_alloc.c:5416 __free_slab+0xcf/0x190 mm/slub.c:1894 free_slab mm/slub.c:1909 [inline] discard_slab+0x29/0x40 mm/slub.c:1915 __slab_free+0x30d/0x3a0 mm/slub.c:3131 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_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440 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 getname_flags+0xba/0x520 fs/namei.c:141 getname+0x19/0x20 fs/namei.c:212 do_sys_openat2+0xd7/0x6f0 fs/open.c:1211 Memory state around the buggy address: ffff888164ab5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888164ab5180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888164ab5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888164ab5280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888164ab5300: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc ================================================================== EXT4-fs warning (device loop3): ext4_enable_quotas:6455: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix. EXT4-fs (loop3): mount failed