================================================================== BUG: KASAN: use-after-free in __ext4_iget+0x2ee/0x3f00 fs/ext4/inode.c:4672 Read of size 8 at addr ffff888119f78b18 by task syz.0.978/3778 CPU: 1 PID: 3778 Comm: syz.0.978 Tainted: G W 5.15.152-syzkaller-00143-g70e1a731d986 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 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: 0033:0x7fb69647b0fa 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:00007fb6950f8e68 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb6950f8ef0 RCX: 00007fb69647b0fa RDX: 0000000020000100 RSI: 0000000020000500 RDI: 00007fb6950f8eb0 RBP: 0000000020000100 R08: 00007fb6950f8ef0 R09: 0000000002008002 R10: 0000000002008002 R11: 0000000000000202 R12: 0000000020000500 R13: 00007fb6950f8eb0 R14: 000000000000053d R15: 0000000020000080 Allocated by task 633: 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:2805 [inline] f2fs_alloc_inode+0x26/0x340 fs/f2fs/super.c:1406 alloc_inode fs/inode.c:236 [inline] new_inode_pseudo+0x64/0x220 fs/inode.c:937 new_inode+0x28/0x1c0 fs/inode.c:966 f2fs_new_inode+0x10e/0x1410 fs/f2fs/namei.c:36 __f2fs_tmpfile+0xab/0x380 fs/f2fs/namei.c:862 f2fs_get_tmpfile+0x2f/0x40 fs/f2fs/namei.c:946 f2fs_ioc_start_atomic_write+0x4b8/0x9c0 fs/f2fs/file.c:2058 __f2fs_ioctl+0x13e6/0xb760 f2fs_ioctl+0x143/0x1d0 fs/f2fs/file.c:4205 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0x114/0x190 fs/ioctl.c:860 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860 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+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_evict_inode+0x17c/0x1470 fs/f2fs/inode.c:771 evict+0x2a3/0x630 fs/inode.c:587 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:4657 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 ffff888119f78610 which belongs to the cache f2fs_inode_cache of size 1424 The buggy address is located 1288 bytes inside of 1424-byte region [ffff888119f78610, ffff888119f78ba0) The buggy address belongs to the page: page:ffffea000467de00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888119f7ced0 pfn:0x119f78 head:ffffea000467de00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000122 ffff888107fb3800 raw: ffff888119f7ced0 0000000080150007 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 633, ts 60599940570, free_ts 59526190449 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1b/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5777 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:2805 [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+0x55/0x5040 fs/f2fs/inode.c:498 f2fs_fill_super+0x4eed/0x8170 fs/f2fs/super.c:4265 mount_bdev+0x282/0x3b0 fs/super.c:1387 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4625 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:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534 free_unref_page+0xe8/0x750 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5853 __free_slab+0xec/0x1d0 mm/slub.c:2020 free_slab mm/slub.c:2035 [inline] discard_slab mm/slub.c:2041 [inline] __unfreeze_partials+0x165/0x1a0 mm/slub.c:2527 put_cpu_partial+0xc4/0x120 mm/slub.c:2607 __slab_free+0x1c8/0x290 mm/slub.c:3388 do_slab_free mm/slub.c:3507 [inline] ___cache_free+0x109/0x120 mm/slub.c:3526 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443 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 getname_flags+0xba/0x520 fs/namei.c:138 user_path_at_empty+0x2d/0x1a0 fs/namei.c:2882 Memory state around the buggy address: ffff888119f78a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888119f78a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888119f78b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888119f78b80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff888119f78c00: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs error (device loop0): ext4_quota_enable:6366: inode #3: comm syz.0.978: unexpected EA_INODE flag EXT4-fs error (device loop0): ext4_quota_enable:6369: comm syz.0.978: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop0): ext4_enable_quotas:6410: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed