loop0: detected capacity change from 0 to 512 ================================================================== BUG: KASAN: use-after-free in __ext4_iget+0x2ee/0x3f00 fs/ext4/inode.c:4641 Read of size 8 at addr ffff88808671efb0 by task syz-executor.0/19262 CPU: 0 PID: 19262 Comm: syz-executor.0 Not tainted 5.15.148-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 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 __ext4_iget+0x2ee/0x3f00 fs/ext4/inode.c:4641 ext4_quota_enable fs/ext4/super.c:6367 [inline] ext4_enable_quotas+0x54f/0xd40 fs/ext4/super.c:6403 ext4_fill_super+0x9598/0xa110 fs/ext4/super.c:4951 mount_bdev+0x2c9/0x3f0 fs/super.c:1387 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1517 do_new_mount+0x2ba/0xb40 fs/namespace.c:3005 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2d5/0x3c0 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: 0033:0x7ff89d0d94aa 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:00007ff89b657ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ff89b657f80 RCX: 00007ff89d0d94aa RDX: 0000000020000080 RSI: 0000000020000500 RDI: 00007ff89b657f40 RBP: 0000000020000080 R08: 00007ff89b657f80 R09: 0000000000004500 R10: 0000000000004500 R11: 0000000000000202 R12: 0000000020000500 R13: 00007ff89b657f40 R14: 00000000000004b4 R15: 000000000000002c Allocated by task 18656: 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 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2644 [inline] f2fs_alloc_inode+0x15d/0x5b0 fs/f2fs/super.c:1383 alloc_inode fs/inode.c:236 [inline] iget_locked+0x194/0x7f0 fs/inode.c:1244 f2fs_iget+0x52/0x49c0 fs/f2fs/inode.c:489 f2fs_fill_super+0x6484/0x8350 fs/f2fs/super.c:4255 mount_bdev+0x2c9/0x3f0 fs/super.c:1387 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1517 do_new_mount+0x2ba/0xb40 fs/namespace.c:3005 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2d5/0x3c0 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 Last potentially related work creation: kasan_save_stack+0x36/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3007 [inline] call_rcu+0x1c4/0xa70 kernel/rcu/tree.c:3087 f2fs_put_super+0x726/0xd10 fs/f2fs/super.c:1618 generic_shutdown_super+0x136/0x2c0 fs/super.c:475 kill_block_super+0x7a/0xe0 fs/super.c:1414 kill_f2fs_super+0x2ff/0x3c0 fs/f2fs/super.c:4534 deactivate_locked_super+0xa0/0x110 fs/super.c:335 cleanup_mnt+0x44e/0x500 fs/namespace.c:1143 task_work_run+0x129/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x5d/0x250 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+0x36/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3007 [inline] call_rcu+0x1c4/0xa70 kernel/rcu/tree.c:3087 f2fs_fill_super+0x6907/0x8350 fs/f2fs/super.c:4438 mount_bdev+0x2c9/0x3f0 fs/super.c:1387 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1517 do_new_mount+0x2ba/0xb40 fs/namespace.c:3005 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2d5/0x3c0 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 The buggy address belongs to the object at ffff88808671e880 which belongs to the cache f2fs_inode_cache of size 2304 The buggy address is located 1840 bytes inside of 2304-byte region [ffff88808671e880, ffff88808671f180) The buggy address belongs to the page: page:ffffea000219c600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88808671e880 pfn:0x86718 head:ffffea000219c600 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff88803fbacb01 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888146aba280 raw: ffff88808671e880 00000000800d0004 00000001ffffffff ffff88803fbacb01 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 16268, ts 465093170734, free_ts 454303551256 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 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2644 [inline] f2fs_alloc_inode+0x15d/0x5b0 fs/f2fs/super.c:1383 alloc_inode fs/inode.c:236 [inline] new_inode_pseudo+0x60/0x210 fs/inode.c:937 new_inode+0x25/0x1d0 fs/inode.c:966 f2fs_new_inode+0x117/0x1150 fs/f2fs/namei.c:35 f2fs_create+0x161/0x14a0 fs/f2fs/namei.c:357 lookup_open fs/namei.c:3468 [inline] open_last_lookups fs/namei.c:3538 [inline] path_openat+0x12f6/0x2f20 fs/namei.c:3745 do_filp_open+0x21c/0x460 fs/namei.c:3775 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 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 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 user_path_at_empty+0x2a/0x180 fs/namei.c:2882 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x106/0x3b0 fs/stat.c:221 vfs_fstatat fs/stat.c:243 [inline] __do_sys_newfstatat fs/stat.c:411 [inline] __se_sys_newfstatat fs/stat.c:405 [inline] __x64_sys_newfstatat+0x12c/0x1b0 fs/stat.c:405 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: ffff88808671ee80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88808671ef00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88808671ef80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88808671f000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88808671f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================