EXT4-fs error (device loop4): __ext4_get_inode_loc:4719: comm syz-executor.4: Invalid inode table block 0 in block_group 0 EXT4-fs error (device loop4) in ext4_reserve_inode_write:6081: Corrupt filesystem ================================================================== BUG: KASAN: slab-out-of-bounds in crc16+0x1bd/0x280 lib/crc16.c:58 Read of size 1 at addr ffff88814449e088 by task syz-executor.4/13075 CPU: 1 PID: 13075 Comm: syz-executor.4 Not tainted 5.4.233-syzkaller-00030-ga6b5274af71b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x241 lib/dump_stack.c:118 print_address_description+0x8c/0x600 mm/kasan/report.c:384 __kasan_report+0xf3/0x120 mm/kasan/report.c:516 kasan_report+0x30/0x60 mm/kasan/common.c:653 crc16+0x1bd/0x280 lib/crc16.c:58 ext4_group_desc_csum+0x90b/0xc40 fs/ext4/super.c:2545 ext4_group_desc_csum_set+0x197/0x230 fs/ext4/super.c:2568 ext4_mb_mark_diskspace_used+0xa2d/0x1130 fs/ext4/mballoc.c:3035 ext4_mb_new_blocks+0x7d0/0x2d10 fs/ext4/mballoc.c:4594 ext4_ext_map_blocks+0x1e70/0x7450 fs/ext4/extents.c:4511 ext4_map_blocks+0xa83/0x1c40 fs/ext4/inode.c:661 _ext4_get_block+0x21b/0x610 fs/ext4/inode.c:812 ext4_block_write_begin+0x685/0x1180 fs/ext4/inode.c:1223 ext4_write_begin+0x5ba/0x1900 fs/ext4/inode.c:1361 ext4_da_write_begin+0x4a3/0xfe0 fs/ext4/inode.c:3119 generic_perform_write+0x2c7/0x560 mm/filemap.c:3311 __generic_file_write_iter+0x239/0x490 mm/filemap.c:3440 ext4_file_write_iter+0x499/0x10e0 fs/ext4/file.c:270 call_write_iter include/linux/fs.h:1981 [inline] new_sync_write fs/read_write.c:483 [inline] __vfs_write+0x5d3/0x750 fs/read_write.c:496 vfs_write+0x206/0x4e0 fs/read_write.c:558 ksys_write+0x199/0x2c0 fs/read_write.c:611 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Allocated by task 24769: save_stack mm/kasan/common.c:70 [inline] set_track mm/kasan/common.c:78 [inline] __kasan_kmalloc+0x130/0x1d0 mm/kasan/common.c:529 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc_node mm/slub.c:2829 [inline] slab_alloc mm/slub.c:2837 [inline] kmem_cache_alloc+0xd0/0x220 mm/slub.c:2842 kmem_cache_zalloc include/linux/slab.h:680 [inline] __kernfs_new_node+0xdb/0x6e0 fs/kernfs/dir.c:639 kernfs_new_node+0x95/0x160 fs/kernfs/dir.c:705 __kernfs_create_file+0x45/0x260 fs/kernfs/file.c:1001 sysfs_add_file_mode_ns+0x292/0x340 fs/sysfs/file.c:306 create_files fs/sysfs/group.c:63 [inline] internal_create_group+0x573/0xf00 fs/sysfs/group.c:148 netdev_queue_add_kobject net/core/net-sysfs.c:1573 [inline] netdev_queue_update_kobjects+0x18b/0x3a0 net/core/net-sysfs.c:1595 register_queue_kobjects net/core/net-sysfs.c:1637 [inline] netdev_register_kobject+0x263/0x310 net/core/net-sysfs.c:1858 register_netdevice+0xbc5/0x12a0 net/core/dev.c:9176 veth_newlink+0x833/0xb70 drivers/net/veth.c:1330 __rtnl_newlink net/core/rtnetlink.c:3230 [inline] rtnl_newlink+0x1511/0x2010 net/core/rtnetlink.c:3289 rtnetlink_rcv_msg+0x983/0xc70 net/core/rtnetlink.c:5262 netlink_rcv_skb+0x1d5/0x420 net/netlink/af_netlink.c:2509 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline] netlink_unicast+0x936/0xb20 net/netlink/af_netlink.c:1347 netlink_sendmsg+0xa18/0xcf0 net/netlink/af_netlink.c:1943 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] ____sys_sendmsg+0x5ac/0x8f0 net/socket.c:2287 ___sys_sendmsg net/socket.c:2341 [inline] __sys_sendmsg+0x28b/0x380 net/socket.c:2387 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff88814449e000 which belongs to the cache kernfs_node_cache of size 136 The buggy address is located 0 bytes to the right of 136-byte region [ffff88814449e000, ffff88814449e088) The buggy address belongs to the page: page:ffffea0005112780 refcount:1 mapcount:0 mapping:ffff8881f5cf8a00 index:0x0 flags: 0x8000000000000200(slab) raw: 8000000000000200 dead000000000100 dead000000000122 ffff8881f5cf8a00 raw: 0000000000000000 0000000000140014 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) set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook mm/page_alloc.c:2165 [inline] prep_new_page+0x18f/0x370 mm/page_alloc.c:2171 get_page_from_freelist+0x2ce8/0x2d70 mm/page_alloc.c:3794 __alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4891 alloc_slab_page+0x39/0x3c0 mm/slub.c:343 allocate_slab mm/slub.c:1683 [inline] new_slab+0x97/0x440 mm/slub.c:1749 new_slab_objects mm/slub.c:2505 [inline] ___slab_alloc+0x2fe/0x490 mm/slub.c:2667 __slab_alloc+0x5a/0x90 mm/slub.c:2707 slab_alloc_node mm/slub.c:2792 [inline] slab_alloc mm/slub.c:2837 [inline] kmem_cache_alloc+0x100/0x220 mm/slub.c:2842 kmem_cache_zalloc include/linux/slab.h:680 [inline] __kernfs_new_node+0xdb/0x6e0 fs/kernfs/dir.c:639 kernfs_new_node fs/kernfs/dir.c:705 [inline] kernfs_create_dir_ns+0x90/0x220 fs/kernfs/dir.c:1029 internal_create_group+0x2c2/0xf00 fs/sysfs/group.c:136 dpm_sysfs_add+0x65/0x270 drivers/base/power/sysfs.c:651 device_add+0x536/0xbb0 drivers/base/core.c:2865 netdev_register_kobject+0x176/0x310 net/core/net-sysfs.c:1854 register_netdevice+0xbc5/0x12a0 net/core/dev.c:9176 veth_newlink+0x833/0xb70 drivers/net/veth.c:1330 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1176 [inline] free_pcp_prepare mm/page_alloc.c:1233 [inline] free_unref_page_prepare+0x297/0x380 mm/page_alloc.c:3085 free_unref_page_list+0x10a/0x590 mm/page_alloc.c:3154 release_pages+0xa06/0xa40 mm/swap.c:842 __pagevec_release+0xc3/0x150 mm/swap.c:862 pagevec_release include/linux/pagevec.h:88 [inline] truncate_inode_pages_range+0x7b7/0x1620 mm/truncate.c:367 kill_bdev fs/block_dev.c:87 [inline] __blkdev_put+0x2e9/0x710 fs/block_dev.c:1881 deactivate_locked_super+0xa8/0x110 fs/super.c:335 deactivate_super+0x1e2/0x2a0 fs/super.c:366 cleanup_mnt+0x419/0x4d0 fs/namespace.c:1102 task_work_run+0x140/0x170 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x18b/0x1a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Memory state around the buggy address: ffff88814449df80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88814449e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88814449e080: 00 fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 ^ ffff88814449e100: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ffff88814449e180: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs error (device loop4): __ext4_get_inode_loc:4719: comm syz-executor.4: Invalid inode table block 0 in block_group 0 EXT4-fs error (device loop4) in ext4_reserve_inode_write:6081: Corrupt filesystem EXT4-fs error (device loop4): __ext4_get_inode_loc:4719: comm syz-executor.4: Invalid inode table block 0 in block_group 0 EXT4-fs error (device loop4) in ext4_reserve_inode_write:6081: Corrupt filesystem EXT4-fs error (device loop4): __ext4_get_inode_loc:4719: comm syz-executor.4: Invalid inode table block 0 in block_group 0 EXT4-fs error (device loop4) in ext4_reserve_inode_write:6081: Corrupt filesystem EXT4-fs error (device loop4): __ext4_get_inode_loc:4719: comm syz-executor.4: Invalid inode table block 0 in block_group 0 EXT4-fs error (device loop4) in ext4_reserve_inode_write:6081: Corrupt filesystem