EXT4-fs (loop0): 1 truncate cleaned up
EXT4-fs (loop0): mounted filesystem without journal. Opts: noblock_validity,max_batch_time=0x0000000000000002,lazytime,block_validity,stripe=0x000000000000000d,nombcache,,errors=continue
==================================================================
BUG: KASAN: slab-out-of-bounds in ext4_read_inline_data fs/ext4/inline.c:209 [inline]
BUG: KASAN: slab-out-of-bounds in ext4_convert_inline_data_nolock+0x313/0xcc0 fs/ext4/inline.c:1242
Read of size 68 at addr ffff8881134f5c80 by task syz.0.17/392

CPU: 1 PID: 392 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x100/0x140 mm/kasan/report.c:452
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 memcpy+0x2d/0x70 mm/kasan/shadow.c:65
 ext4_read_inline_data fs/ext4/inline.c:209 [inline]
 ext4_convert_inline_data_nolock+0x313/0xcc0 fs/ext4/inline.c:1242
 ext4_try_add_inline_entry+0x73d/0xa70 fs/ext4/inline.c:1367
 ext4_add_entry+0x674/0xf90 fs/ext4/namei.c:2414
 ext4_mkdir+0x509/0xc60 fs/ext4/namei.c:3019
 vfs_mkdir+0x42c/0x600 fs/namei.c:3798
 do_mkdirat+0x14c/0x340 fs/namei.c:3820
 __do_sys_mkdirat fs/namei.c:3831 [inline]
 __se_sys_mkdirat fs/namei.c:3829 [inline]
 __x64_sys_mkdirat+0x7b/0x90 fs/namei.c:3829
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f5a00ac4cc7
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 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:00007f5a00927e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f5a00927ee0 RCX: 00007f5a00ac4cc7
RDX: 00000000000001ff RSI: 0000200000000080 RDI: 00000000ffffff9c
RBP: 0000200000000140 R08: 0000200000000080 R09: 0000000000000000
R10: 0000200000000140 R11: 0000000000000246 R12: 0000200000000080
R13: 00007f5a00927ea0 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 0:
(stack is not available)

Freed by task 390:
 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:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1600 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
 slab_free mm/slub.c:3208 [inline]
 kfree+0xc0/0x270 mm/slub.c:4196
 skb_free_head net/core/skbuff.c:606 [inline]
 skb_release_data+0x53b/0x690 net/core/skbuff.c:626
 skb_release_all net/core/skbuff.c:680 [inline]
 __kfree_skb net/core/skbuff.c:694 [inline]
 consume_skb+0xab/0x1f0 net/core/skbuff.c:851
 netlink_broadcast_filtered+0x1164/0x1260 net/netlink/af_netlink.c:1530
 netlink_broadcast net/netlink/af_netlink.c:1552 [inline]
 nlmsg_multicast include/net/netlink.h:1033 [inline]
 nlmsg_notify+0xe9/0x1a0 net/netlink/af_netlink.c:2546
 rtnl_notify+0x9a/0xc0 net/core/rtnetlink.c:740
 inet6_rt_notify+0x375/0x480 net/ipv6/route.c:6066
 fib6_add_rt2node net/ipv6/ip6_fib.c:1253 [inline]
 fib6_add+0x2174/0x3c60 net/ipv6/ip6_fib.c:1482
 __ip6_ins_rt net/ipv6/route.c:1304 [inline]
 ip6_ins_rt+0xd3/0x130 net/ipv6/route.c:1314
 __ipv6_ifa_notify+0x4df/0xe70 net/ipv6/addrconf.c:6162
 ipv6_ifa_notify net/ipv6/addrconf.c:6202 [inline]
 addrconf_dad_completed+0x18c/0xe30 net/ipv6/addrconf.c:4248
 addrconf_dad_work+0xc5f/0x1480 net/ipv6/addrconf.c:-1
 process_one_work+0x6fd/0xbc0 kernel/workqueue.c:2301
 worker_thread+0xa8e/0x13c0 kernel/workqueue.c:2447
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff8881134f5800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 128 bytes to the right of
 1024-byte region [ffff8881134f5800, ffff8881134f5c00)
The buggy address belongs to the page:
page:ffffea00044d3c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1134f0
head:ffffea00044d3c00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042f00
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 369, ts 24865945206, free_ts 24853033574
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x176/0x190 mm/page_alloc.c:2462
 get_page_from_freelist+0x225f/0x23f0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x29a/0x640 mm/page_alloc.c:5384
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2f8/0x4c0 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 __kmalloc_track_caller+0x1e4/0x310 mm/slub.c:4541
 __kmalloc_reserve net/core/skbuff.c:144 [inline]
 __alloc_skb+0xdc/0x520 net/core/skbuff.c:212
 alloc_skb include/linux/skbuff.h:1126 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 inet6_rt_notify+0x293/0x480 net/ipv6/route.c:6054
 fib6_add_rt2node net/ipv6/ip6_fib.c:1253 [inline]
 fib6_add+0x2174/0x3c60 net/ipv6/ip6_fib.c:1482
 __ip6_ins_rt net/ipv6/route.c:1304 [inline]
 ip6_route_add+0x89/0x130 net/ipv6/route.c:3772
 addrconf_prefix_route net/ipv6/addrconf.c:2463 [inline]
 fixup_permanent_addr net/ipv6/addrconf.c:3519 [inline]
 addrconf_permanent_addr+0x635/0x940 net/ipv6/addrconf.c:3543
 addrconf_notify+0x752/0xea0 net/ipv6/addrconf.c:3611
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:410
 call_netdevice_notifiers_info net/core/dev.c:2054 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2066 [inline]
 call_netdevice_notifiers net/core/dev.c:2080 [inline]
 __dev_notify_flags+0x2f4/0x5b0 net/core/dev.c:8585
 dev_change_flags+0xe3/0x1a0 net/core/dev.c:8623
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 __free_pages_ok+0x80b/0x830 mm/page_alloc.c:1629
 free_the_page mm/page_alloc.c:5445 [inline]
 __free_pages+0xd8/0x390 mm/page_alloc.c:5454
 __free_slab+0xcf/0x190 mm/slub.c:1899
 free_slab mm/slub.c:1914 [inline]
 discard_slab mm/slub.c:1920 [inline]
 unfreeze_partials+0x150/0x180 mm/slub.c:2415
 put_cpu_partial+0xc1/0x180 mm/slub.c:2451
 __slab_free+0x2c9/0x3a0 mm/slub.c:3100
 do_slab_free mm/slub.c:3196 [inline]
 ___cache_free+0x10e/0x130 mm/slub.c:3215
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x15a/0x2d0 mm/slub.c:2965
 sock_alloc_inode+0x1b/0xb0 net/socket.c:253
 alloc_inode fs/inode.c:233 [inline]
 new_inode_pseudo+0x62/0x210 fs/inode.c:968
 sock_alloc net/socket.c:574 [inline]
 __sock_create+0x12c/0x770 net/socket.c:1400

Memory state around the buggy address:
 ffff8881134f5b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881134f5c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881134f5c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff8881134f5d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881134f5d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
EXT4-fs error (device loop0): ext4_check_all_de:659: inode #12: block 7: comm syz.0.17: bad entry in directory: directory entry overrun - offset=0, inode=901261600, rec_len=7976, size=124 fake=0