EXT4-fs error (device loop4): ext4_readdir:260: inode #2: block 48: comm syz-executor: path /18/file0: bad entry in directory: rec_len is smaller than minimal - offset=980, inode=0, rec_len=0, size=1024 fake=0 ================================================================== 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_read_inline_dir+0x48b/0xdf0 fs/ext4/inline.c:1483 Read of size 836 at addr ffff88805376751a by task syz-executor/12178 CPU: 1 UID: 0 PID: 12178 Comm: syz-executor Not tainted 6.11.0-rc6-syzkaller-00183-gb831f83e40a2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 ext4_read_inline_data fs/ext4/inline.c:209 [inline] ext4_read_inline_dir+0x48b/0xdf0 fs/ext4/inline.c:1483 ext4_readdir+0x3bb/0x3500 fs/ext4/dir.c:158 iterate_dir+0x57a/0x810 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:407 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:392 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f29c25af093 Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 42 43 f8 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 a8 ff ff ff f7 d8 RSP: 002b:00007ffc1ac932a8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 000055558e8d5640 RCX: 00007f29c25af093 RDX: 0000000000008000 RSI: 000055558e8d5640 RDI: 0000000000000006 RBP: 000055558e8d5614 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8 R13: 0000000000000016 R14: 000055558e8d5610 R15: 00007ffc1ac96640 Allocated by task 12873: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3992 [inline] slab_alloc_node mm/slub.c:4041 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4048 __kernfs_new_node+0xd8/0x870 fs/kernfs/dir.c:624 kernfs_new_node+0x137/0x240 fs/kernfs/dir.c:700 __kernfs_create_file+0x49/0x2e0 fs/kernfs/file.c:1034 sysfs_add_file_mode_ns+0x24a/0x310 fs/sysfs/file.c:307 create_files fs/sysfs/group.c:76 [inline] internal_create_group+0x7a7/0x11d0 fs/sysfs/group.c:180 internal_create_groups fs/sysfs/group.c:220 [inline] sysfs_create_groups+0x56/0x120 fs/sysfs/group.c:246 device_add_groups drivers/base/core.c:2829 [inline] device_add_attrs+0x199/0x600 drivers/base/core.c:2904 device_add+0x576/0xbf0 drivers/base/core.c:3636 netdev_register_kobject+0x17e/0x320 net/core/net-sysfs.c:2136 register_netdevice+0x12c5/0x1b00 net/core/dev.c:10444 veth_newlink+0x855/0xce0 drivers/net/veth.c:1860 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline] __rtnl_newlink net/core/rtnetlink.c:3730 [inline] rtnl_newlink+0x1591/0x20a0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6647 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2212 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880537674b0 which belongs to the cache kernfs_node_cache of size 176 The buggy address is located 106 bytes inside of allocated 176-byte region [ffff8880537674b0, ffff888053767560) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x53767 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000000 ffff88801c2e5000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000110011 00000001fdffffff 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 0x152cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 12873, tgid 12873 (syz-executor), ts 701161182572, free_ts 700361427824 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1500 prep_new_page mm/page_alloc.c:1508 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3446 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4702 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2325 allocate_slab+0x5a/0x2f0 mm/slub.c:2488 new_slab mm/slub.c:2541 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3727 __slab_alloc+0x58/0xa0 mm/slub.c:3817 __slab_alloc_node mm/slub.c:3870 [inline] slab_alloc_node mm/slub.c:4029 [inline] kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4048 __kernfs_new_node+0xd8/0x870 fs/kernfs/dir.c:624 kernfs_new_node+0x137/0x240 fs/kernfs/dir.c:700 __kernfs_create_file+0x49/0x2e0 fs/kernfs/file.c:1034 sysfs_add_file_mode_ns+0x24a/0x310 fs/sysfs/file.c:307 create_files fs/sysfs/group.c:76 [inline] internal_create_group+0x7a7/0x11d0 fs/sysfs/group.c:180 internal_create_groups fs/sysfs/group.c:220 [inline] sysfs_create_groups+0x56/0x120 fs/sysfs/group.c:246 device_add_groups drivers/base/core.c:2829 [inline] device_add_attrs+0x199/0x600 drivers/base/core.c:2904 device_add+0x576/0xbf0 drivers/base/core.c:3636 page last free pid 12873 tgid 12873 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1101 [inline] free_unref_page+0xd19/0xea0 mm/page_alloc.c:2619 discard_slab mm/slub.c:2587 [inline] __put_partials+0xeb/0x130 mm/slub.c:3055 put_cpu_partial+0x17c/0x250 mm/slub.c:3130 __slab_free+0x2ea/0x3d0 mm/slub.c:4347 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3992 [inline] slab_alloc_node mm/slub.c:4041 [inline] __kmalloc_cache_noprof+0x132/0x2c0 mm/slub.c:4188 kmalloc_noprof include/linux/slab.h:681 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:642 [inline] netdevice_event+0x37d/0x950 drivers/infiniband/core/roce_gid_mgmt.c:801 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 __netdev_upper_dev_link+0x4c3/0x670 net/core/dev.c:7945 netdev_master_upper_dev_link+0xb1/0x100 net/core/dev.c:8015 batadv_hardif_enable_interface+0x26e/0x9f0 net/batman-adv/hard-interface.c:734 batadv_softif_slave_add+0x79/0x100 net/batman-adv/soft-interface.c:844 do_set_master net/core/rtnetlink.c:2701 [inline] do_setlink+0xe73/0x41f0 net/core/rtnetlink.c:2907 __rtnl_newlink net/core/rtnetlink.c:3696 [inline] rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3743 Memory state around the buggy address: ffff888053767400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc ffff888053767480: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 >ffff888053767500: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ^ ffff888053767580: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ffff888053767600: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ==================================================================