loop4: detected capacity change from 0 to 512 ================================================================== BUG: KASAN: use-after-free in __ext4_iget+0x2ee/0x3f00 fs/ext4/inode.c:4672 Read of size 8 at addr ffff888126c31d48 by task syz.4.570/2747 CPU: 1 PID: 2747 Comm: syz.4.570 Not tainted 5.15.150-syzkaller-00330-g9044d25b8ff5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:444 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 __ext4_iget+0x2ee/0x3f00 fs/ext4/inode.c:4672 ext4_quota_enable fs/ext4/super.c:6366 [inline] ext4_enable_quotas+0x556/0x980 fs/ext4/super.c:6402 ext4_fill_super+0x8b95/0x96e0 fs/ext4/super.c:4950 mount_bdev+0x282/0x3b0 fs/super.c:1387 ext4_mount+0x34/0x40 fs/ext4/super.c:6581 legacy_get_tree+0xf1/0x190 fs/fs_context.c:611 vfs_get_tree+0x88/0x290 fs/super.c:1517 do_new_mount+0x2ba/0xb30 fs/namespace.c:3005 path_mount+0x671/0x1070 fs/namespace.c:3335 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3533 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3533 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 RIP: 0033:0x7fcc463811ea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 7e 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:00007fcc45600e78 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fcc45600f00 RCX: 00007fcc463811ea RDX: 00000000200004c0 RSI: 0000000020000500 RDI: 00007fcc45600ec0 RBP: 00000000200004c0 R08: 00007fcc45600f00 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000500 R13: 00007fcc45600ec0 R14: 00000000000004a6 R15: 0000000020000240 Allocated by task 2492: 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:433 [inline] __kasan_slab_alloc+0xb1/0xe0 mm/kasan/common.c:466 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2795 [inline] f2fs_alloc_inode+0x26/0x340 fs/f2fs/super.c:1406 alloc_inode fs/inode.c:236 [inline] iget_locked+0x174/0x860 fs/inode.c:1244 f2fs_iget+0x55/0x4de0 fs/f2fs/inode.c:489 f2fs_fill_super+0x670b/0x80e0 fs/f2fs/super.c:4339 mount_bdev+0x282/0x3b0 fs/super.c:1387 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4578 legacy_get_tree+0xf1/0x190 fs/fs_context.c:611 vfs_get_tree+0x88/0x290 fs/super.c:1517 do_new_mount+0x2ba/0xb30 fs/namespace.c:3005 path_mount+0x671/0x1070 fs/namespace.c:3335 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3533 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3533 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 291: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749 slab_free mm/slub.c:3519 [inline] kmem_cache_free+0x116/0x2e0 mm/slub.c:3535 f2fs_free_inode+0x24/0x30 fs/f2fs/super.c:1550 i_callback+0x4b/0x70 fs/inode.c:225 rcu_do_batch+0x57a/0xc10 kernel/rcu/tree.c:2523 rcu_core+0x517/0x1020 kernel/rcu/tree.c:2763 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2776 __do_softirq+0x26d/0x5bf kernel/softirq.c:565 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu_common kernel/rcu/tree.c:3007 [inline] call_rcu+0x135/0x1310 kernel/rcu/tree.c:3125 destroy_inode fs/inode.c:291 [inline] evict+0x5df/0x630 fs/inode.c:602 dispose_list fs/inode.c:620 [inline] evict_inodes+0x5db/0x660 fs/inode.c:670 generic_shutdown_super+0x9c/0x2e0 fs/super.c:454 kill_block_super+0x7e/0xe0 fs/super.c:1414 kill_f2fs_super+0x2f9/0x3c0 fs/f2fs/super.c:4610 deactivate_locked_super+0xad/0x110 fs/super.c:335 deactivate_super+0xbe/0xf0 fs/super.c:366 cleanup_mnt+0x45c/0x510 fs/namespace.c:1143 __cleanup_mnt+0x19/0x20 fs/namespace.c:1150 task_work_run+0x129/0x190 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xc4/0xe0 kernel/entry/common.c:175 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 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+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu_common kernel/rcu/tree.c:3007 [inline] call_rcu+0x135/0x1310 kernel/rcu/tree.c:3125 destroy_inode fs/inode.c:291 [inline] evict+0x5df/0x630 fs/inode.c:602 iput_final fs/inode.c:1705 [inline] iput+0x63b/0x7e0 fs/inode.c:1731 f2fs_put_super+0x683/0xc10 fs/f2fs/super.c:1638 generic_shutdown_super+0x157/0x2e0 fs/super.c:475 kill_block_super+0x7e/0xe0 fs/super.c:1414 kill_f2fs_super+0x2f9/0x3c0 fs/f2fs/super.c:4610 deactivate_locked_super+0xad/0x110 fs/super.c:335 deactivate_super+0xbe/0xf0 fs/super.c:366 cleanup_mnt+0x45c/0x510 fs/namespace.c:1143 __cleanup_mnt+0x19/0x20 fs/namespace.c:1150 task_work_run+0x129/0x190 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xc4/0xe0 kernel/entry/common.c:175 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff888126c31840 which belongs to the cache f2fs_inode_cache of size 1424 The buggy address is located 1288 bytes inside of 1424-byte region [ffff888126c31840, ffff888126c31dd0) The buggy address belongs to the page: page:ffffea00049b0c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x126c30 head:ffffea00049b0c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000122 ffff8881003e2d80 raw: 0000000000000000 0000000080150015 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 500, ts 50428496187, free_ts 41323798709 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2604 prep_new_page+0x1b/0x110 mm/page_alloc.c:2610 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4484 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5776 allocate_slab mm/slub.c:1932 [inline] new_slab+0x9a/0x4e0 mm/slub.c:1995 ___slab_alloc+0x39e/0x830 mm/slub.c:3028 __slab_alloc+0x4a/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc+0x134/0x200 mm/slub.c:3253 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2795 [inline] f2fs_alloc_inode+0x26/0x340 fs/f2fs/super.c:1406 alloc_inode fs/inode.c:236 [inline] iget_locked+0x174/0x860 fs/inode.c:1244 f2fs_iget+0x55/0x4de0 fs/f2fs/inode.c:489 f2fs_fill_super+0x4eed/0x80e0 fs/f2fs/super.c:4223 mount_bdev+0x282/0x3b0 fs/super.c:1387 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4578 legacy_get_tree+0xf1/0x190 fs/fs_context.c:611 vfs_get_tree+0x88/0x290 fs/super.c:1517 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1471 [inline] free_pcp_prepare mm/page_alloc.c:1543 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3533 free_unref_page_list+0x14b/0xa60 mm/page_alloc.c:3670 release_pages+0x1310/0x1370 mm/swap.c:1009 __pagevec_release+0x84/0x100 mm/swap.c:1029 pagevec_release include/linux/pagevec.h:81 [inline] shmem_undo_range+0x604/0x1560 mm/shmem.c:965 shmem_truncate_range mm/shmem.c:1064 [inline] shmem_evict_inode+0x215/0x9d0 mm/shmem.c:1146 evict+0x2a3/0x630 fs/inode.c:587 iput_final fs/inode.c:1705 [inline] iput+0x63b/0x7e0 fs/inode.c:1731 dentry_unlink_inode+0x34f/0x440 fs/dcache.c:376 __dentry_kill+0x447/0x660 fs/dcache.c:582 dentry_kill+0xc0/0x2a0 dput+0x45/0x80 fs/dcache.c:889 __fput+0x662/0x910 fs/file_table.c:288 ____fput+0x15/0x20 fs/file_table.c:308 task_work_run+0x129/0x190 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0xc48/0x2ca0 kernel/exit.c:878 Memory state around the buggy address: ffff888126c31c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888126c31c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888126c31d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888126c31d80: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc ffff888126c31e00: fc fc fc fc fc fc fc fc fc fc 00 00 00 00 00 00 ================================================================== EXT4-fs warning (device loop4): ext4_enable_quotas:6410: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix. EXT4-fs (loop4): mount failed