ubi0: scanning is finished ================================================================== BUG: KASAN: slab-out-of-bounds in squashfs_get_id+0x1ae/0x1d0 syzkaller/managers/linux-4-19/kernel/fs/squashfs/id.c:51 Read of size 8 at addr ffff8880a8d71460 by task syz-executor.2/17071 CPU: 1 PID: 17071 Comm: syz-executor.2 Not tainted 4.19.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 syzkaller/managers/linux-4-19/kernel/mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 syzkaller/managers/linux-4-19/kernel/mm/kasan/report.c:354 kasan_report syzkaller/managers/linux-4-19/kernel/mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 syzkaller/managers/linux-4-19/kernel/mm/kasan/report.c:433 squashfs_get_id+0x1ae/0x1d0 syzkaller/managers/linux-4-19/kernel/fs/squashfs/id.c:51 squashfs_new_inode syzkaller/managers/linux-4-19/kernel/fs/squashfs/inode.c:64 [inline] squashfs_read_inode+0x1b4/0x1b40 syzkaller/managers/linux-4-19/kernel/fs/squashfs/inode.c:133 squashfs_fill_super+0x1655/0x1c00 syzkaller/managers/linux-4-19/kernel/fs/squashfs/super.c:318 mount_bdev+0x2fc/0x3b0 syzkaller/managers/linux-4-19/kernel/fs/super.c:1158 mount_fs+0xa3/0x310 syzkaller/managers/linux-4-19/kernel/fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:961 vfs_kern_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:951 [inline] do_new_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:2799 ksys_mount+0xcf/0x130 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3015 __do_sys_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3029 [inline] __se_sys_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3026 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x46702a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f29ea554fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000046702a RDX: 0000000020000000 RSI: 0000000020002040 RDI: 00007f29ea555000 RBP: 00007f29ea555040 R08: 00007f29ea555040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020002040 R14: 00007f29ea555000 R15: 0000000020002040 Allocated by task 16489: __do_kmalloc syzkaller/managers/linux-4-19/kernel/mm/slab.c:3727 [inline] __kmalloc_track_caller+0x155/0x3c0 syzkaller/managers/linux-4-19/kernel/mm/slab.c:3742 kstrdup+0x36/0x70 syzkaller/managers/linux-4-19/kernel/mm/util.c:56 kstrdup_const+0x53/0x80 syzkaller/managers/linux-4-19/kernel/mm/util.c:77 __kernfs_new_node+0x9b/0x680 syzkaller/managers/linux-4-19/kernel/fs/kernfs/dir.c:629 kernfs_new_node+0x92/0x120 syzkaller/managers/linux-4-19/kernel/fs/kernfs/dir.c:693 kernfs_create_link+0xd1/0x230 syzkaller/managers/linux-4-19/kernel/fs/kernfs/symlink.c:40 sysfs_do_create_link_sd+0x90/0x130 syzkaller/managers/linux-4-19/kernel/fs/sysfs/symlink.c:43 sysfs_do_create_link syzkaller/managers/linux-4-19/kernel/fs/sysfs/symlink.c:79 [inline] sysfs_create_link+0x5f/0xc0 syzkaller/managers/linux-4-19/kernel/fs/sysfs/symlink.c:91 device_add_class_symlinks syzkaller/managers/linux-4-19/kernel/drivers/base/core.c:1933 [inline] device_add+0x7d1/0x16d0 syzkaller/managers/linux-4-19/kernel/drivers/base/core.c:2135 netdev_register_kobject+0x181/0x430 syzkaller/managers/linux-4-19/kernel/net/core/net-sysfs.c:1806 register_netdevice+0xb46/0x10f0 syzkaller/managers/linux-4-19/kernel/net/core/dev.c:8722 register_vlan_dev+0x2f1/0x7d0 syzkaller/managers/linux-4-19/kernel/net/8021q/vlan.c:172 register_vlan_device syzkaller/managers/linux-4-19/kernel/net/8021q/vlan.c:273 [inline] vlan_ioctl_handler+0xaf9/0xf00 syzkaller/managers/linux-4-19/kernel/net/8021q/vlan.c:615 sock_ioctl+0x39e/0x5d0 syzkaller/managers/linux-4-19/kernel/net/socket.c:1052 vfs_ioctl syzkaller/managers/linux-4-19/kernel/fs/ioctl.c:46 [inline] file_ioctl syzkaller/managers/linux-4-19/kernel/fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 syzkaller/managers/linux-4-19/kernel/fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 syzkaller/managers/linux-4-19/kernel/fs/ioctl.c:705 __do_sys_ioctl syzkaller/managers/linux-4-19/kernel/fs/ioctl.c:712 [inline] __se_sys_ioctl syzkaller/managers/linux-4-19/kernel/fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 syzkaller/managers/linux-4-19/kernel/fs/ioctl.c:710 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 31730: __cache_free syzkaller/managers/linux-4-19/kernel/mm/slab.c:3503 [inline] kfree+0xcc/0x210 syzkaller/managers/linux-4-19/kernel/mm/slab.c:3822 kvfree+0x59/0x60 syzkaller/managers/linux-4-19/kernel/mm/util.c:452 __vunmap+0x2a5/0x3f0 syzkaller/managers/linux-4-19/kernel/mm/vmalloc.c:1534 vfree+0x65/0x100 syzkaller/managers/linux-4-19/kernel/mm/vmalloc.c:1598 copy_entries_to_user syzkaller/managers/linux-4-19/kernel/net/ipv4/netfilter/arp_tables.c:711 [inline] get_entries syzkaller/managers/linux-4-19/kernel/net/ipv4/netfilter/arp_tables.c:866 [inline] do_arpt_get_ctl+0x652/0x7c0 syzkaller/managers/linux-4-19/kernel/net/ipv4/netfilter/arp_tables.c:1488 nf_sockopt syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x72/0xd0 syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:122 ip_getsockopt syzkaller/managers/linux-4-19/kernel/net/ipv4/ip_sockglue.c:1574 [inline] ip_getsockopt+0x167/0x1c0 syzkaller/managers/linux-4-19/kernel/net/ipv4/ip_sockglue.c:1554 tcp_getsockopt+0x86/0xd0 syzkaller/managers/linux-4-19/kernel/net/ipv4/tcp.c:3618 __sys_getsockopt+0x135/0x210 syzkaller/managers/linux-4-19/kernel/net/socket.c:1938 __do_sys_getsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1949 [inline] __se_sys_getsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1946 [inline] __x64_sys_getsockopt+0xba/0x150 syzkaller/managers/linux-4-19/kernel/net/socket.c:1946 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880a8d71440 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes to the right of 32-byte region [ffff8880a8d71440, ffff8880a8d71460) The buggy address belongs to the page: page:ffffea0002a35c40 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff8880a8d71fc1 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea000298eb08 ffffea0002ca33c8 ffff88813bff01c0 raw: ffff8880a8d71fc1 ffff8880a8d71000 0000000100000032 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a8d71300: 00 00 00 fc fc fc fc fc 00 00 fc fc fc fc fc fc ffff8880a8d71380: 00 00 fc fc fc fc fc fc 00 00 fc fc fc fc fc fc >ffff8880a8d71400: 00 fc fc fc fc fc fc fc 00 02 fc fc fc fc fc fc ^ ffff8880a8d71480: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a8d71500: 00 00 fc fc fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================