loop8: detected capacity change from 0 to 1024 EXT4-fs (loop8): Test dummy encryption mode enabled EXT4-fs (loop8): Test dummy encryption mode enabled ================================================================== BUG: KASAN: use-after-free in check_igot_inode fs/ext4/inode.c:-1 [inline] BUG: KASAN: use-after-free in __ext4_iget+0x2b5/0x3cb0 fs/ext4/inode.c:4704 Read of size 8 at addr ffff888111bc1d48 by task syz.8.8179/26320 CPU: 0 PID: 26320 Comm: syz.8.8179 Tainted: G W 5.15.185-syzkaller-00339-ge678c93d43cc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0xf1/0x140 mm/kasan/report.c:444 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 check_igot_inode fs/ext4/inode.c:-1 [inline] __ext4_iget+0x2b5/0x3cb0 fs/ext4/inode.c:4704 ext4_quota_enable fs/ext4/super.c:6403 [inline] ext4_enable_quotas+0x33b/0x6d0 fs/ext4/super.c:6439 ext4_fill_super+0x8761/0x9030 fs/ext4/super.c:4951 mount_bdev+0x2ae/0x3e0 fs/super.c:1400 ext4_mount+0x34/0x40 fs/ext4/super.c:6618 legacy_get_tree+0xed/0x190 fs/fs_context.c:611 vfs_get_tree+0x89/0x260 fs/super.c:1530 do_new_mount+0x25a/0xa20 fs/namespace.c:3010 path_mount+0x675/0x1020 fs/namespace.c:3340 do_mount fs/namespace.c:3353 [inline] __do_sys_mount fs/namespace.c:3561 [inline] __se_sys_mount+0x318/0x380 fs/namespace.c:3538 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3538 x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fcf6bc330ca 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:00007fcf6a257e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fcf6a257ef0 RCX: 00007fcf6bc330ca RDX: 0000200000000140 RSI: 0000200000000200 RDI: 00007fcf6a257eb0 RBP: 0000200000000140 R08: 00007fcf6a257ef0 R09: 0000000000004010 R10: 0000000000004010 R11: 0000000000000246 R12: 0000200000000200 R13: 00007fcf6a257eb0 R14: 00000000000005fd R15: 0000200000000300 Allocated by task 26265: 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+0xbd/0xf0 mm/kasan/common.c:466 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3250 [inline] kmem_cache_alloc+0xf7/0x260 mm/slub.c:3255 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2802 [inline] f2fs_alloc_inode+0x26/0x330 fs/f2fs/super.c:1419 alloc_inode fs/inode.c:261 [inline] iget_locked+0x16c/0x7e0 fs/inode.c:1308 f2fs_iget+0x55/0x5130 fs/f2fs/inode.c:510 f2fs_fill_super+0x45c7/0x6d10 fs/f2fs/super.c:4386 mount_bdev+0x2ae/0x3e0 fs/super.c:1400 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4635 legacy_get_tree+0xed/0x190 fs/fs_context.c:611 vfs_get_tree+0x89/0x260 fs/super.c:1530 do_new_mount+0x25a/0xa20 fs/namespace.c:3010 path_mount+0x675/0x1020 fs/namespace.c:3340 do_mount fs/namespace.c:3353 [inline] __do_sys_mount fs/namespace.c:3561 [inline] __se_sys_mount+0x318/0x380 fs/namespace.c:3538 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3538 x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 26257: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4a/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x125/0x160 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+0xc2/0x190 mm/slub.c:1749 slab_free mm/slub.c:3521 [inline] kmem_cache_free+0x100/0x320 mm/slub.c:3539 f2fs_free_inode+0x24/0x30 fs/f2fs/super.c:1567 i_callback+0x4c/0x70 fs/inode.c:250 rcu_do_batch+0x51d/0xba0 kernel/rcu/tree.c:2523 rcu_core+0x5e4/0xf80 kernel/rcu/tree.c:2763 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2776 handle_softirqs+0x250/0x560 kernel/softirq.c:583 __do_softirq kernel/softirq.c:621 [inline] invoke_softirq kernel/softirq.c:443 [inline] __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:670 irq_exit_rcu+0x9/0x10 kernel/softirq.c:682 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676 Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd2/0x100 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+0xf6/0xf60 kernel/rcu/tree.c:3125 destroy_inode fs/inode.c:316 [inline] evict+0x7da/0x870 fs/inode.c:662 iput_final fs/inode.c:1769 [inline] iput+0x635/0x7c0 fs/inode.c:1795 f2fs_fill_super+0x53ce/0x6d10 fs/f2fs/super.c:4571 mount_bdev+0x2ae/0x3e0 fs/super.c:1400 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4635 legacy_get_tree+0xed/0x190 fs/fs_context.c:611 vfs_get_tree+0x89/0x260 fs/super.c:1530 do_new_mount+0x25a/0xa20 fs/namespace.c:3010 path_mount+0x675/0x1020 fs/namespace.c:3340 do_mount fs/namespace.c:3353 [inline] __do_sys_mount fs/namespace.c:3561 [inline] __se_sys_mount+0x318/0x380 fs/namespace.c:3538 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3538 x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Second to last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd2/0x100 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+0xf6/0xf60 kernel/rcu/tree.c:3125 destroy_inode fs/inode.c:316 [inline] evict+0x7da/0x870 fs/inode.c:662 iput_final fs/inode.c:1769 [inline] iput+0x635/0x7c0 fs/inode.c:1795 dentry_unlink_inode+0x32f/0x3e0 fs/dcache.c:380 __dentry_kill+0x44f/0x650 fs/dcache.c:586 dentry_kill+0xc0/0x2a0 fs/dcache.c:-1 dput+0x47/0x90 fs/dcache.c:893 do_renameat2+0x8ba/0xf60 fs/namei.c:4987 __do_sys_rename fs/namei.c:5031 [inline] __se_sys_rename fs/namei.c:5029 [inline] __x64_sys_rename+0x86/0x90 fs/namei.c:5029 x64_sys_call+0x680/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:83 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff888111bc1840 which belongs to the cache f2fs_inode_cache of size 1424 The buggy address is located 1288 bytes inside of 1424-byte region [ffff888111bc1840, ffff888111bc1dd0) The buggy address belongs to the page: page:ffffea000446f000 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888111bc4ed0 pfn:0x111bc0 head:ffffea000446f000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000122 ffff8881081f6600 raw: ffff888111bc4ed0 000000008015000b 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 1689, ts 103045172618, free_ts 47124472564 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485 __alloc_pages+0x18f/0x440 mm/page_alloc.c:5789 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1932 [inline] new_slab+0xa1/0x4d0 mm/slub.c:1995 ___slab_alloc+0x381/0x810 mm/slub.c:3028 __slab_alloc+0x49/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3250 [inline] kmem_cache_alloc+0x138/0x260 mm/slub.c:3255 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2802 [inline] f2fs_alloc_inode+0x26/0x330 fs/f2fs/super.c:1419 alloc_inode fs/inode.c:261 [inline] iget_locked+0x16c/0x7e0 fs/inode.c:1308 f2fs_iget+0x55/0x5130 fs/f2fs/inode.c:510 f2fs_fill_super+0x3a20/0x6d10 fs/f2fs/super.c:4275 mount_bdev+0x2ae/0x3e0 fs/super.c:1400 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4635 legacy_get_tree+0xed/0x190 fs/fs_context.c:611 vfs_get_tree+0x89/0x260 fs/super.c:1530 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+0x542/0x550 mm/page_alloc.c:3534 free_unref_page+0xa2/0x550 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5865 __free_slab+0xe8/0x1e0 mm/slub.c:2020 free_slab mm/slub.c:2035 [inline] discard_slab mm/slub.c:2041 [inline] __unfreeze_partials+0x160/0x190 mm/slub.c:2527 put_cpu_partial+0xc6/0x120 mm/slub.c:2607 __slab_free+0x1d4/0x290 mm/slub.c:3390 do_slab_free mm/slub.c:3509 [inline] ___cache_free+0x104/0x120 mm/slub.c:3530 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xf0 mm/kasan/common.c:443 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3250 [inline] kmem_cache_alloc+0xf7/0x260 mm/slub.c:3255 getname_flags+0xb9/0x500 fs/namei.c:138 getname+0x19/0x20 fs/namei.c:217 Memory state around the buggy address: ffff888111bc1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888111bc1c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888111bc1d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888111bc1d80: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc ffff888111bc1e00: fc fc fc fc fc fc fc fc fc fc 00 00 00 00 00 00 ================================================================== EXT4-fs error (device loop8): ext4_quota_enable:6403: inode #3: comm syz.8.8179: unexpected EA_INODE flag EXT4-fs error (device loop8): ext4_quota_enable:6406: comm syz.8.8179: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop8): ext4_enable_quotas:6447: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop8): mount failed