==================================================================
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_inlinedir_to_tree+0x555/0x1160 fs/ext4/inline.c:1401
Read of size 68 at addr ffff888111552ec9 by task syz-executor.2/369

CPU: 0 PID: 369 Comm: syz-executor.2 Not tainted 5.10.234-syzkaller-1006652-g3f5f2283d684 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:452
 kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189
 memcpy+0x2d/0x70 mm/kasan/shadow.c:65
 ext4_read_inline_data fs/ext4/inline.c:209 [inline]
 ext4_inlinedir_to_tree+0x555/0x1160 fs/ext4/inline.c:1401
 ext4_htree_fill_tree+0x5d1/0x13e0 fs/ext4/namei.c:1186
 ext4_dx_readdir fs/ext4/dir.c:598 [inline]
 ext4_readdir+0x2dde/0x37c0 fs/ext4/dir.c:142
 iterate_dir+0x265/0x580
 __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
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f27edef2363
Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 62 8b 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:00007ffde01a4228 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 0000555569a09890 RCX: 00007f27edef2363
RDX: 0000000000008000 RSI: 0000555569a09890 RDI: 0000000000000006
RBP: 0000555569a09864 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffb0
R13: 0000000000000016 R14: 0000555569a09860 R15: 0000000000000008

Allocated by task 0:
(stack is not available)

Freed by task 369:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x121/0x160 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:1595 [inline]
 slab_free_freelist_hook+0xc0/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kfree+0xc3/0x270 mm/slub.c:4191
 skb_free_head net/core/skbuff.c:606 [inline]
 skb_release_data+0x5c6/0x6f0 net/core/skbuff.c:626
 skb_release_all net/core/skbuff.c:680 [inline]
 __kfree_skb net/core/skbuff.c:694 [inline]
 consume_skb+0xac/0x250 net/core/skbuff.c:851
 skb_free_datagram+0x28/0xe0 net/core/datagram.c:325
 netlink_recvmsg+0x5ef/0x11b0 net/netlink/af_netlink.c:1980
 sock_recvmsg_nosec net/socket.c:905 [inline]
 sock_recvmsg net/socket.c:923 [inline]
 __sys_recvfrom+0x432/0x5d0 net/socket.c:2063
 __do_sys_recvfrom net/socket.c:2081 [inline]
 __se_sys_recvfrom net/socket.c:2077 [inline]
 __x64_sys_recvfrom+0xe5/0x100 net/socket.c:2077
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff888111552c00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 201 bytes to the right of
 512-byte region [ffff888111552c00, ffff888111552e00)
The buggy address belongs to the page:
page:ffffea0004455400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x111550
head:ffffea0004455400 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 369, ts 61131311557, free_ts 61079449760
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x166/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x80/0x400 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x302/0x4b0 mm/slub.c:2791
 __slab_alloc+0x63/0xa0 mm/slub.c:2831
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 __kmalloc+0x204/0x330 mm/slub.c:4029
 kmalloc include/linux/slab.h:557 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 fib6_info_alloc+0x33/0xe0 net/ipv6/ip6_fib.c:154
 ip6_route_info_create+0x4b7/0x1440 net/ipv6/route.c:3667
 ip6_route_add+0x27/0x130 net/ipv6/route.c:3761
 addrconf_add_mroute net/ipv6/addrconf.c:2525 [inline]
 addrconf_add_dev+0x415/0x610 net/ipv6/addrconf.c:2543
 inet6_addr_add+0x1a7/0x930 net/ipv6/addrconf.c:2981
 inet6_rtm_newaddr+0x8d9/0x2740 net/ipv6/addrconf.c:4957
 rtnetlink_rcv_msg+0x955/0xc50 net/core/rtnetlink.c:5607
 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2485
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5625
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+0x82c/0x850 mm/page_alloc.c:1629
 free_the_page+0x76/0x370 mm/page_alloc.c:5409
 __free_pages+0x67/0xc0 mm/page_alloc.c:5418
 __free_slab+0xcf/0x190 mm/slub.c:1894
 free_slab mm/slub.c:1909 [inline]
 discard_slab mm/slub.c:1915 [inline]
 unfreeze_partials+0x15e/0x190 mm/slub.c:2410
 put_cpu_partial+0xbf/0x180 mm/slub.c:2446
 __slab_free+0x2c8/0x3a0 mm/slub.c:3095
 do_slab_free mm/slub.c:3191 [inline]
 ___cache_free+0x111/0x130 mm/slub.c:3210
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x47/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x15a/0x170 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+0x61/0x2f0 mm/slab.h:583
 slab_alloc_node mm/slub.c:2947 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x168/0x2e0 mm/slub.c:2960
 kmem_cache_alloc_node include/linux/slab.h:423 [inline]
 __alloc_skb+0x80/0x510 net/core/skbuff.c:200
 alloc_skb include/linux/skbuff.h:1126 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 netlink_ack+0x33c/0xb30 net/netlink/af_netlink.c:2420

Memory state around the buggy address:
 ffff888111552d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888111552e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888111552e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                              ^
 ffff888111552f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888111552f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
EXT4-fs error (device loop2): ext4_inlinedir_to_tree:1439: inode #12: block 7: comm syz-executor.2: path /root/syzkaller-testdir430991225/syzkaller.ZIacRO/0/file0/file0: bad entry in directory: directory entry overrun - offset=34816, inode=2538880996, rec_len=34812, size=128 fake=0
EXT4-fs error (device loop2): empty_inline_dir:1850: inode #12: block 7: comm syz-executor.2: bad entry in directory: directory entry overrun - offset=4, inode=2538880996, rec_len=34812, size=60 fake=0
EXT4-fs warning (device loop2): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2538880996, rec_len 34812, name_len 234inline size 60
EXT4-fs error (device loop2): ext4_inlinedir_to_tree:1439: inode #12: block 7: comm syz-executor.2: path /root/syzkaller-testdir430991225/syzkaller.ZIacRO/0/file0/file0: bad entry in directory: directory entry overrun - offset=34816, inode=2538880996, rec_len=34812, size=128 fake=0
EXT4-fs error (device loop2): empty_inline_dir:1850: inode #12: block 7: comm syz-executor.2: bad entry in directory: directory entry overrun - offset=4, inode=2538880996, rec_len=34812, size=60 fake=0
EXT4-fs warning (device loop2): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2538880996, rec_len 34812, name_len 234inline size 60
EXT4-fs error (device loop2): ext4_inlinedir_to_tree:1439: inode #12: block 7: comm syz-executor.2: path /root/syzkaller-testdir430991225/syzkaller.ZIacRO/0/file0/file0: bad entry in directory: directory entry overrun - offset=34816, inode=2538880996, rec_len=34812, size=128 fake=0
EXT4-fs error (device loop2): empty_inline_dir:1850: inode #12: block 7: comm syz-executor.2: bad entry in directory: directory entry overrun - offset=4, inode=2538880996, rec_len=34812, size=60 fake=0
EXT4-fs warning (device loop2): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2538880996, rec_len 34812, name_len 234inline size 60
EXT4-fs error (device loop2): ext4_inlinedir_to_tree:1439: inode #12: block 7: comm syz-executor.2: path /root/syzkaller-testdir430991225/syzkaller.ZIacRO/0/file0/file0: bad entry in directory: directory entry overrun - offset=34816, inode=2538880996, rec_len=34812, size=128 fake=0
EXT4-fs error (device loop2): empty_inline_dir:1850: inode #12: block 7: comm syz-executor.2: bad entry in directory: directory entry overrun - offset=4, inode=2538880996, rec_len=34812, size=60 fake=0
EXT4-fs warning (device loop2): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2538880996, rec_len 34812, name_len 234inline size 60
EXT4-fs error (device loop2): ext4_inlinedir_to_tree:1439: inode #12: block 7: comm syz-executor.2: path /root/syzkaller-testdir430991225/syzkaller.ZIacRO/0/file0/file0: bad entry in directory: directory entry overrun - offset=34816, inode=2538880996, rec_len=34812, size=128 fake=0
EXT4-fs error (device loop2): empty_inline_dir:1850: inode #12: block 7: comm syz-executor.2: bad entry in directory: directory entry overrun - offset=4, inode=2538880996, rec_len=34812, size=60 fake=0
EXT4-fs warning (device loop2): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2538880996, rec_len 34812, name_len 234inline size 60
EXT4-fs warning (device loop2): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2538880996, rec_len 34812, name_len 234inline size 60
EXT4-fs warning (device loop2): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2538880996, rec_len 34812, name_len 234inline size 60
EXT4-fs warning (device loop2): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2538880996, rec_len 34812, name_len 234inline size 60
EXT4-fs warning (device loop2): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2538880996, rec_len 34812, name_len 234inline size 60
EXT4-fs warning (device loop2): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2538880996, rec_len 34812, name_len 234inline size 60