syzbot has found a reproducer for the following issue on: HEAD commit: 596b6b709632 Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=1151054cc80000 kernel config: https://syzkaller.appspot.com/x/.config?x=3519974f3f27816d dashboard link: https://syzkaller.appspot.com/bug?extid=8785e41224a3afd04321 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16ce3de4c80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16b02598c80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/06e2210b88a3/disk-596b6b70.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/79e6930ab577/vmlinux-596b6b70.xz kernel image: https://storage.googleapis.com/syzbot-assets/56b95e6bcb5c/Image-596b6b70.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/a765d6554060/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8785e41224a3afd04321@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: slab-out-of-bounds in crc16+0xc0/0x104 lib/crc16.c:58 Read of size 1 at addr ffff0000d5eff0a8 by task syz-executor175/8245 CPU: 1 PID: 8245 Comm: syz-executor175 Not tainted 6.2.0-syzkaller-18302-g596b6b709632 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x174/0x4c0 mm/kasan/report.c:417 kasan_report+0xd4/0x130 mm/kasan/report.c:517 __asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348 crc16+0xc0/0x104 lib/crc16.c:58 ext4_group_desc_csum+0x6a8/0x99c fs/ext4/super.c:3187 ext4_group_desc_csum_set+0x17c/0x210 fs/ext4/super.c:3210 __ext4_new_inode+0x20dc/0x3acc fs/ext4/ialloc.c:1227 ext4_create+0x234/0x480 fs/ext4/namei.c:2809 lookup_open fs/namei.c:3413 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0xe6c/0x2578 fs/namei.c:3711 do_filp_open+0x1bc/0x3cc fs/namei.c:3741 do_sys_openat2+0x128/0x3d8 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1337 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Allocated by task 5961: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:512 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x80/0x478 mm/slab.h:761 slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x288/0x37c mm/slub.c:3476 kmem_cache_zalloc include/linux/slab.h:710 [inline] __kernfs_new_node+0xe4/0x66c fs/kernfs/dir.c:614 kernfs_new_node+0x98/0x184 fs/kernfs/dir.c:676 __kernfs_create_file+0x60/0x2d4 fs/kernfs/file.c:1047 sysfs_add_file_mode_ns+0x1dc/0x298 fs/sysfs/file.c:294 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x428/0xbec fs/sysfs/group.c:148 internal_create_groups fs/sysfs/group.c:188 [inline] sysfs_create_groups+0x60/0x130 fs/sysfs/group.c:214 create_dir lib/kobject.c:68 [inline] kobject_add_internal+0x5d4/0xb14 lib/kobject.c:223 kobject_add_varg lib/kobject.c:358 [inline] kobject_init_and_add+0x130/0x1a0 lib/kobject.c:441 netdev_queue_add_kobject net/core/net-sysfs.c:1666 [inline] netdev_queue_update_kobjects+0x1d8/0x470 net/core/net-sysfs.c:1718 register_queue_kobjects net/core/net-sysfs.c:1779 [inline] netdev_register_kobject+0x22c/0x2d8 net/core/net-sysfs.c:2019 register_netdevice+0xcb8/0x1270 net/core/dev.c:10037 bond_newlink+0x50/0xa8 drivers/net/bonding/bond_netlink.c:560 rtnl_newlink_create net/core/rtnetlink.c:3407 [inline] __rtnl_newlink net/core/rtnetlink.c:3624 [inline] rtnl_newlink+0x1174/0x1b1c net/core/rtnetlink.c:3637 rtnetlink_rcv_msg+0x6ec/0xc8c net/core/rtnetlink.c:6141 netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2574 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6159 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x660/0x8d4 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x800/0xae0 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x3b4/0x504 net/socket.c:2120 __do_sys_sendto net/socket.c:2132 [inline] __se_sys_sendto net/socket.c:2128 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2128 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 The buggy address belongs to the object at ffff0000d5eff000 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 0 bytes to the right of 168-byte region [ffff0000d5eff000, ffff0000d5eff0a8) The buggy address belongs to the physical page: page:0000000016584f53 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x115eff flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000200 ffff0000c0844c00 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000110011 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d5efef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000d5eff000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000d5eff080: 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00 ^ ffff0000d5eff100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000d5eff180: 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 00 00 ================================================================== EXT4-fs error (device loop3): __ext4_get_inode_loc:4560: comm syz-executor175: Invalid inode table block 4 in block_group 0 EXT4-fs error (device loop3) in ext4_reserve_inode_write:5906: Corrupt filesystem EXT4-fs error (device loop3): __ext4_get_inode_loc:4560: comm syz-executor175: Invalid inode table block 4 in block_group 0 EXT4-fs error (device loop3) in ext4_reserve_inode_write:5906: Corrupt filesystem EXT4-fs error (device loop3): ext4_evict_inode:279: inode #18: comm syz-executor175: mark_inode_dirty error EXT4-fs warning (device loop3): ext4_evict_inode:282: couldn't mark inode dirty (err -117)
