BUG: KASAN: slab-out-of-bounds in ext4_htree_fill_tree+0x1316/0x13e0 fs/ext4/namei.c:1246
Read of size 1 at addr ffff88810d7f7a67 by task syz-executor225/307

CPU: 0 PID: 307 Comm: syz-executor225 Not tainted 6.1.118-syzkaller-00074-g3e3f2b9e9fca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0x158/0x4e0 mm/kasan/report.c:427
 kasan_report+0x13c/0x170 mm/kasan/report.c:531
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:348
 ext4_htree_fill_tree+0x1316/0x13e0 fs/ext4/namei.c:1246
 ext4_dx_readdir fs/ext4/dir.c:605 [inline]
 ext4_readdir+0x2e6f/0x3860 fs/ext4/dir.c:142
 iterate_dir+0x265/0x600
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x1c1/0x460 fs/readdir.c:354
 __x64_sys_getdents64+0x7b/0x90 fs/readdir.c:354
 x64_sys_call+0x5ae/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:218
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4f17789023
Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 62 99 fa ff 66 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 b0 ff ff ff f7 d8
RSP: 002b:00007ffdc1151208 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 0000555559c74830 RCX: 00007f4f17789023
RDX: 0000000000008000 RSI: 0000555559c74830 RDI: 0000000000000004
RBP: 0000555559c74804 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffb0
R13: 0000000000000010 R14: 0000555559c74800 R15: 0000000000000001
 </TASK>

Allocated by task 329:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:379 [inline]
 __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc_node+0xb4/0x1e0 mm/slab_common.c:945
 kmalloc_node include/linux/slab.h:583 [inline]
 kvmalloc_node+0x221/0x640 mm/util.c:592
 kvmalloc include/linux/slab.h:710 [inline]
 simple_xattr_alloc fs/xattr.c:1008 [inline]
 simple_xattr_set+0xba/0x580 fs/xattr.c:1072
 shmem_xattr_handler_set+0x46/0xe0 mm/shmem.c:3342
 __vfs_setxattr+0x3ed/0x440 fs/xattr.c:182
 __vfs_setxattr_noperm+0x126/0x5e0 fs/xattr.c:216
 __vfs_setxattr_locked+0x215/0x230 fs/xattr.c:277
 vfs_setxattr+0x21d/0x420 fs/xattr.c:309
 do_setxattr fs/xattr.c:594 [inline]
 setxattr+0x250/0x2b0 fs/xattr.c:617
 path_setxattr+0x1bc/0x2a0 fs/xattr.c:636
 __do_sys_lsetxattr fs/xattr.c:659 [inline]
 __se_sys_lsetxattr fs/xattr.c:655 [inline]
 __x64_sys_lsetxattr+0xc2/0xe0 fs/xattr.c:655
 x64_sys_call+0x506/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:190
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 329:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1745 [inline]
 slab_free_freelist_hook mm/slub.c:1771 [inline]
 slab_free mm/slub.c:3686 [inline]
 __kmem_cache_free+0x21d/0x410 mm/slub.c:3702
 kfree+0x7a/0xf0 mm/slab_common.c:990
 kvfree+0x35/0x40 mm/util.c:639
 simple_xattr_set+0x55c/0x580 fs/xattr.c:1112
 shmem_xattr_handler_set+0x46/0xe0 mm/shmem.c:3342
 __vfs_setxattr+0x3ed/0x440 fs/xattr.c:182
 __vfs_setxattr_noperm+0x126/0x5e0 fs/xattr.c:216
 __vfs_setxattr_locked+0x215/0x230 fs/xattr.c:277
 vfs_setxattr+0x21d/0x420 fs/xattr.c:309
 do_setxattr fs/xattr.c:594 [inline]
 setxattr+0x250/0x2b0 fs/xattr.c:617
 path_setxattr+0x1bc/0x2a0 fs/xattr.c:636
 __do_sys_lsetxattr fs/xattr.c:659 [inline]
 __se_sys_lsetxattr fs/xattr.c:655 [inline]
 __x64_sys_lsetxattr+0xc2/0xe0 fs/xattr.c:655
 x64_sys_call+0x506/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:190
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff88810d7f7a00
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 39 bytes to the right of
 64-byte region [ffff88810d7f7a00, ffff88810d7f7a40)

The buggy address belongs to the physical page:
page:ffffea000435fdc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10d7f7
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff888100042780
raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 294, tgid 294 (strace-static-x), ts 28768546849, free_ts 28768267626
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2597
 get_page_from_freelist+0x2f41/0x2fc0 mm/page_alloc.c:4462
 __alloc_pages+0x234/0x610 mm/page_alloc.c:5759
 alloc_slab_page+0x6c/0xf0
 allocate_slab mm/slub.c:1962 [inline]
 new_slab+0x90/0x3e0 mm/slub.c:2015
 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203
 __slab_alloc+0x5d/0xa0 mm/slub.c:3302
 slab_alloc_node mm/slub.c:3387 [inline]
 __kmem_cache_alloc_node+0x207/0x2a0 mm/slub.c:3462
 kmalloc_trace+0x2a/0xa0 mm/slab_common.c:1028
 kmalloc include/linux/slab.h:557 [inline]
 call_modprobe kernel/kmod.c:79 [inline]
 __request_module+0x28c/0x8d0 kernel/kmod.c:170
 sock_load_diag_module+0xd6/0x130 net/core/sock.c:3989
 __sock_diag_cmd net/core/sock_diag.c:228 [inline]
 sock_diag_rcv_msg+0x205/0x400 net/core/sock_diag.c:266
 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2518
 sock_diag_rcv+0x28/0x40 net/core/sock_diag.c:277
 netlink_unicast_kernel net/netlink/af_netlink.c:1327 [inline]
 netlink_unicast+0x906/0xab0 net/netlink/af_netlink.c:1353
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1498 [inline]
 free_pcp_prepare mm/page_alloc.c:1572 [inline]
 free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3511
 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3607
 free_the_page+0x13/0x20 mm/page_alloc.c:798
 page_frag_free+0x108/0x120 mm/page_alloc.c:5987
 skb_free_frag include/linux/skbuff.h:3260 [inline]
 skb_free_head net/core/skbuff.c:760 [inline]
 skb_release_data+0x6ba/0x840 net/core/skbuff.c:791
 skb_release_all net/core/skbuff.c:856 [inline]
 __kfree_skb+0x50/0x70 net/core/skbuff.c:870
 tcp_rcv_established+0xe39/0x1c60 net/ipv4/tcp_input.c:6007
 tcp_v4_do_rcv+0x430/0xa20 net/ipv4/tcp_ipv4.c:1683
 tcp_v4_rcv+0x20d7/0x2a30 net/ipv4/tcp_ipv4.c:2114
 ip_protocol_deliver_rcu+0x32f/0x720 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x246/0x400 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ip_local_deliver+0x1b3/0x3b0 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:454 [inline]
 ip_sublist_rcv_finish net/ipv4/ip_input.c:580 [inline]
 ip_list_rcv_finish net/ipv4/ip_input.c:631 [inline]
 ip_sublist_rcv+0x7e5/0x990 net/ipv4/ip_input.c:639
 ip_list_rcv+0x422/0x470 net/ipv4/ip_input.c:674
 __netif_receive_skb_list_ptype net/core/dev.c:5595 [inline]
 __netif_receive_skb_list_core+0x6b1/0x890 net/core/dev.c:5643
 __netif_receive_skb_list net/core/dev.c:5695 [inline]
 netif_receive_skb_list_internal+0x967/0xcc0 net/core/dev.c:5786

Memory state around the buggy address:
 ffff88810d7f7900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88810d7f7980: 00 00 00 00 00 00 00 03 fc fc fc fc fc fc fc fc
>ffff88810d7f7a00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                                                       ^
 ffff88810d7f7a80: 00 00 00 00 00 00 00 03 fc fc fc fc fc fc fc fc
 ffff88810d7f7b00: 00 00 00 00 00 00 00 03 fc fc fc fc fc fc fc fc
==================================================================
EXT4-fs (loop3): unmounting filesystem.