EXT4-fs (loop3): feature flags set on rev 0 fs, running e2fsck is recommended
==================================================================
BUG: KASAN: slab-out-of-bounds in check_igot_inode fs/ext4/inode.c:-1 [inline]
BUG: KASAN: slab-out-of-bounds in __ext4_iget+0x2bb/0x3e90 fs/ext4/inode.c:4691
Read of size 8 at addr ffff888073c77f40 by task syz.3.2396/9521

CPU: 0 PID: 9521 Comm: syz.3.2396 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 print_address_description+0x60/0x2d0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xdf/0x130 mm/kasan/report.c:451
 check_igot_inode fs/ext4/inode.c:-1 [inline]
 __ext4_iget+0x2bb/0x3e90 fs/ext4/inode.c:4691
 ext4_fill_super+0x72e8/0x93f0 fs/ext4/super.c:4872
 mount_bdev+0x28a/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x247/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
 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: 0033:0x7fe98fea234a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe98e0f8e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe98e0f8ee0 RCX: 00007fe98fea234a
RDX: 0000200000000000 RSI: 0000200000000500 RDI: 00007fe98e0f8ea0
RBP: 0000200000000000 R08: 00007fe98e0f8ee0 R09: 000000000001c916
R10: 000000000001c916 R11: 0000000000000246 R12: 0000200000000500
R13: 00007fe98e0f8ea0 R14: 00000000000004df R15: 00002000000002c0
 </TASK>

Allocated by task 3559:
 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+0x92/0xc0 mm/kasan/common.c:467
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3225 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 kmem_cache_alloc+0x15d/0x280 mm/slub.c:3238
 alloc_inode fs/inode.c:263 [inline]
 iget_locked+0x1f3/0x820 fs/inode.c:1308
 kernfs_get_inode+0x4a/0x680 fs/kernfs/inode.c:250
 kernfs_iop_lookup+0x1e5/0x310 fs/kernfs/dir.c:1143
 __lookup_slow+0x29d/0x410 fs/namei.c:1671
 lookup_slow+0x53/0x70 fs/namei.c:1688
 walk_component+0x314/0x460 fs/namei.c:1984
 link_path_walk+0x688/0xde0 fs/namei.c:-1
 path_openat+0x28e/0x2fb0 fs/namei.c:3746
 do_filp_open+0x1df/0x400 fs/namei.c:3777
 do_sys_openat2+0x14b/0x500 fs/open.c:1255
 do_sys_open fs/open.c:1271 [inline]
 __do_sys_openat fs/open.c:1287 [inline]
 __se_sys_openat fs/open.c:1282 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1282
 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

Last potentially related work creation:
 kasan_save_stack+0x35/0x60 mm/kasan/common.c:38
 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348
 __call_rcu kernel/rcu/tree.c:3011 [inline]
 call_rcu+0x189/0x900 kernel/rcu/tree.c:3091
 destroy_inode fs/inode.c:316 [inline]
 evict+0x810/0x8b0 fs/inode.c:662
 __dentry_kill+0x412/0x630 fs/dcache.c:586
 shrink_dentry_list+0x388/0x680 fs/dcache.c:1181
 shrink_dcache_parent+0xae/0x3d0 fs/dcache.c:-1
 d_invalidate+0x118/0x270 fs/dcache.c:1717
 lookup_fast+0x5e6/0x720 fs/namei.c:1636
 walk_component+0x81/0x460 fs/namei.c:1980
 link_path_walk+0x688/0xde0 fs/namei.c:-1
 path_openat+0x28e/0x2fb0 fs/namei.c:3746
 do_filp_open+0x1df/0x400 fs/namei.c:3777
 do_sys_openat2+0x14b/0x500 fs/open.c:1255
 do_sys_open fs/open.c:1271 [inline]
 __do_sys_openat fs/open.c:1287 [inline]
 __se_sys_openat fs/open.c:1282 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1282
 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+0x35/0x60 mm/kasan/common.c:38
 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348
 __call_rcu kernel/rcu/tree.c:3011 [inline]
 call_rcu+0x189/0x900 kernel/rcu/tree.c:3091
 destroy_inode fs/inode.c:316 [inline]
 evict+0x810/0x8b0 fs/inode.c:662
 __dentry_kill+0x412/0x630 fs/dcache.c:586
 shrink_dentry_list+0x388/0x680 fs/dcache.c:1181
 shrink_dcache_parent+0xae/0x3d0 fs/dcache.c:-1
 d_invalidate+0x118/0x270 fs/dcache.c:1717
 lookup_fast+0x5e6/0x720 fs/namei.c:1636
 walk_component+0x81/0x460 fs/namei.c:1980
 link_path_walk+0x688/0xde0 fs/namei.c:-1
 path_openat+0x28e/0x2fb0 fs/namei.c:3746
 do_filp_open+0x1df/0x400 fs/namei.c:3777
 do_sys_openat2+0x14b/0x500 fs/open.c:1255
 do_sys_open fs/open.c:1271 [inline]
 __do_sys_openat fs/open.c:1287 [inline]
 __se_sys_openat fs/open.c:1282 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1282
 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 ffff888073c777b0
 which belongs to the cache inode_cache of size 1168
The buggy address is located 768 bytes to the right of
 1168-byte region [ffff888073c777b0, ffff888073c77c40)
The buggy address belongs to the page:
page:ffffea0001cf1d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888073c74a20 pfn:0x73c74
head:ffffea0001cf1d00 order:2 compound_mapcount:0 compound_pincount:0
memcg:ffff888079c0d081
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0001839708 ffffea000183b408 ffff888016ddd780
raw: ffff888073c74a20 00000000000c0008 00000001ffffffff ffff888079c0d081
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Reclaimable, gfp_mask 0xd20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 4053, ts 53694939697, free_ts 24322985337
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x24f6/0x2670 mm/page_alloc.c:4192
 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
 alloc_slab_page mm/slub.c:1780 [inline]
 allocate_slab mm/slub.c:1917 [inline]
 new_slab+0xc0/0x4b0 mm/slub.c:1980
 ___slab_alloc+0x807/0xdd0 mm/slub.c:3013
 __slab_alloc mm/slub.c:3100 [inline]
 slab_alloc_node mm/slub.c:3191 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 kmem_cache_alloc+0xf0/0x280 mm/slub.c:3238
 alloc_inode fs/inode.c:263 [inline]
 new_inode_pseudo+0x77/0x210 fs/inode.c:1001
 get_pipe_inode fs/pipe.c:877 [inline]
 create_pipe_files+0x4c/0x6b0 fs/pipe.c:917
 __do_pipe_flags+0x46/0x1f0 fs/pipe.c:966
 do_pipe2+0xa7/0x190 fs/pipe.c:1014
 __do_sys_pipe2 fs/pipe.c:1032 [inline]
 __se_sys_pipe2 fs/pipe.c:1030 [inline]
 __x64_sys_pipe2+0x56/0x60 fs/pipe.c:1030
 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
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+0x637/0x6c0 mm/page_alloc.c:3317
 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396
 free_contig_range+0x96/0xf0 mm/page_alloc.c:9428
 destroy_args+0xef/0xa00 mm/debug_vm_pgtable.c:1018
 debug_vm_pgtable+0x321/0x380 mm/debug_vm_pgtable.c:1336
 do_one_initcall+0x272/0x730 init/main.c:1315
 do_initcall_level+0x13d/0x1f0 init/main.c:1388
 do_initcalls+0x4b/0x90 init/main.c:1404
 kernel_init_freeable+0x3d5/0x560 init/main.c:1628
 kernel_init+0x19/0x1b0 init/main.c:1519
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

Memory state around the buggy address:
 ffff888073c77e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888073c77e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888073c77f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                           ^
 ffff888073c77f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888073c78000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================