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EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!
EXT4-fs (loop3): encrypted files will use data=ordered instead of data journaling mode
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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+0x2b8/0x3e40 fs/ext4/inode.c:4862
Read of size 8 at addr ffff88805494ff30 by task syz.3.100/4830

CPU: 1 PID: 4830 Comm: syz.3.100 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0xa8/0x210 mm/kasan/report.c:420
 kasan_report+0x10b/0x140 mm/kasan/report.c:524
 check_igot_inode fs/ext4/inode.c:-1 [inline]
 __ext4_iget+0x2b8/0x3e40 fs/ext4/inode.c:4862
 __ext4_fill_super fs/ext4/super.c:5397 [inline]
 ext4_fill_super+0x61bf/0x8150 fs/ext4/super.c:5661
 get_tree_bdev+0x3f1/0x610 fs/super.c:1366
 vfs_get_tree+0x88/0x270 fs/super.c:1573
 do_new_mount+0x24a/0xa40 fs/namespace.c:3078
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3606
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9714390eea
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:00007f97152efe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f97152efef0 RCX: 00007f9714390eea
RDX: 0000200000000040 RSI: 0000200000000680 RDI: 00007f97152efeb0
RBP: 0000200000000040 R08: 00007f97152efef0 R09: 000000000000010e
R10: 000000000000010e R11: 0000000000000246 R12: 0000200000000680
R13: 00007f97152efeb0 R14: 000000000000044d R15: 000000000000002c
 </TASK>

Allocated by task 4779:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 __kasan_slab_alloc+0x6b/0x80 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x4b/0x480 mm/slab.h:737
 slab_alloc_node mm/slub.c:3359 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc_lru+0x11a/0x2e0 mm/slub.c:3390
 alloc_inode_sb include/linux/fs.h:3245 [inline]
 proc_alloc_inode+0x26/0xb0 fs/proc/inode.c:67
 alloc_inode fs/inode.c:261 [inline]
 new_inode_pseudo+0x5f/0x1c0 fs/inode.c:1063
 new_inode+0x25/0x1c0 fs/inode.c:1091
 proc_sys_make_inode+0x4c/0x570 fs/proc/proc_sysctl.c:452
 proc_sys_lookup+0x4d5/0x610 fs/proc/proc_sysctl.c:539
 lookup_open fs/namei.c:3468 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0xfaf/0x2e70 fs/namei.c:3788
 do_filp_open+0x1c1/0x3c0 fs/namei.c:3818
 do_sys_openat2+0x142/0x490 fs/open.c:1320
 do_sys_open fs/open.c:1336 [inline]
 __do_sys_openat fs/open.c:1352 [inline]
 __se_sys_openat fs/open.c:1347 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1347
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Last potentially related work creation:
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:486
 call_rcu+0x154/0x980 kernel/rcu/tree.c:2849
 destroy_inode fs/inode.c:316 [inline]
 evict+0x7da/0x870 fs/inode.c:720
 __dentry_kill+0x431/0x650 fs/dcache.c:611
 shrink_dentry_list+0x39b/0x6a0 fs/dcache.c:1206
 shrink_dcache_parent+0xa8/0x3c0 fs/dcache.c:-1
 d_invalidate+0x118/0x260 fs/dcache.c:1742
 proc_invalidate_siblings_dcache+0x3cf/0x6c0 fs/proc/inode.c:148
 release_task+0x1450/0x1600 kernel/exit.c:278
 wait_task_zombie kernel/exit.c:1208 [inline]
 wait_consider_task+0x1978/0x2e40 kernel/exit.c:1435
 do_wait_thread kernel/exit.c:1498 [inline]
 do_wait+0x31c/0xb60 kernel/exit.c:1615
 kernel_wait4+0x1ab/0x270 kernel/exit.c:1778
 __do_sys_wait4 kernel/exit.c:1806 [inline]
 __se_sys_wait4 kernel/exit.c:1802 [inline]
 __x64_sys_wait4+0x130/0x1e0 kernel/exit.c:1802
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff88805494f590
 which belongs to the cache proc_inode_cache of size 1240
The buggy address is located 1224 bytes to the right of
 1240-byte region [ffff88805494f590, ffff88805494fa68)

The buggy address belongs to the physical page:
page:ffffea0001525200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x54948
head:ffffea0001525200 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff88807b4b5901
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888140130500
raw: 0000000000000000 0000000000170017 00000001ffffffff ffff88807b4b5901
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 4395, tgid 4395 (udevd), ts 85030569123, free_ts 23354791052
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2532
 prep_new_page mm/page_alloc.c:2539 [inline]
 get_page_from_freelist+0x1a26/0x1ac0 mm/page_alloc.c:4328
 __alloc_pages+0x1df/0x4e0 mm/page_alloc.c:5614
 alloc_slab_page+0x5d/0x160 mm/slub.c:1799
 allocate_slab mm/slub.c:1944 [inline]
 new_slab+0x87/0x2c0 mm/slub.c:1997
 ___slab_alloc+0xbc6/0x1230 mm/slub.c:3154
 __slab_alloc mm/slub.c:3240 [inline]
 slab_alloc_node mm/slub.c:3325 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc_lru+0x1ae/0x2e0 mm/slub.c:3390
 alloc_inode_sb include/linux/fs.h:3245 [inline]
 proc_alloc_inode+0x26/0xb0 fs/proc/inode.c:67
 alloc_inode fs/inode.c:261 [inline]
 new_inode_pseudo+0x5f/0x1c0 fs/inode.c:1063
 new_inode+0x25/0x1c0 fs/inode.c:1091
 proc_pid_make_inode+0x20/0x1c0 fs/proc/base.c:1956
 proc_pident_instantiate+0x69/0x2b0 fs/proc/base.c:2703
 proc_pident_lookup+0x1b8/0x260 fs/proc/base.c:2739
 lookup_open fs/namei.c:3468 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0xfaf/0x2e70 fs/namei.c:3788
 do_filp_open+0x1c1/0x3c0 fs/namei.c:3818
 do_sys_openat2+0x142/0x490 fs/open.c:1320
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1459 [inline]
 free_pcp_prepare mm/page_alloc.c:1509 [inline]
 free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384
 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3479
 free_contig_range+0x9d/0x150 mm/page_alloc.c:9574
 destroy_args+0x100/0xa31 mm/debug_vm_pgtable.c:1031
 debug_vm_pgtable+0x32a/0x37e mm/debug_vm_pgtable.c:1359
 do_one_initcall+0x214/0x7a0 init/main.c:1310
 do_initcall_level+0x137/0x1e4 init/main.c:1383
 do_initcalls+0x4b/0x8a init/main.c:1399
 kernel_init_freeable+0x3fa/0x5ac init/main.c:1638
 kernel_init+0x19/0x1b0 init/main.c:1526
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Memory state around the buggy address:
 ffff88805494fe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805494fe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88805494ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                     ^
 ffff88805494ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888054950000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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