================================================================== BUG: KASAN: slab-out-of-bounds in squashfs_get_id+0xb9/0x1c0 fs/squashfs/id.c:38 Read of size 8 at addr ffff88801a123d50 by task syz-executor.5/18569 CPU: 0 PID: 18569 Comm: syz-executor.5 Not tainted 5.10.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x137/0x1be lib/dump_stack.c:118 print_address_description+0x6c/0x660 mm/kasan/report.c:385 __kasan_report mm/kasan/report.c:545 [inline] kasan_report+0x136/0x1e0 mm/kasan/report.c:562 squashfs_get_id+0xb9/0x1c0 fs/squashfs/id.c:38 squashfs_new_inode fs/squashfs/inode.c:51 [inline] squashfs_read_inode+0x19d/0x2690 fs/squashfs/inode.c:120 squashfs_fill_super+0x1665/0x1c90 fs/squashfs/super.c:310 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1344 vfs_get_tree+0x88/0x270 fs/super.c:1549 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x17b4/0x2a20 fs/namespace.c:3205 do_mount fs/namespace.c:3218 [inline] __do_sys_mount fs/namespace.c:3426 [inline] __se_sys_mount+0x28c/0x320 fs/namespace.c:3403 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4608ca Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007f1edb3b5a78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f1edb3b5b10 RCX: 00000000004608ca RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f1edb3b5ad0 RBP: 00007f1edb3b5ad0 R08: 00007f1edb3b5b10 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 0000000020000240 R15: 0000000020000200 Allocated by task 8465: kasan_save_stack mm/kasan/common.c:48 [inline] kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc+0x111/0x140 mm/kasan/common.c:461 __kmalloc_node+0x1b1/0x320 mm/slub.c:4018 kmalloc_node include/linux/slab.h:575 [inline] __vmalloc_area_node mm/vmalloc.c:2476 [inline] __vmalloc_node_range+0x29c/0x830 mm/vmalloc.c:2558 __vmalloc_node mm/vmalloc.c:2601 [inline] vzalloc+0x75/0x80 mm/vmalloc.c:2654 __do_replace+0x65/0xa20 net/ipv6/netfilter/ip6_tables.c:1065 do_replace net/ipv6/netfilter/ip6_tables.c:1156 [inline] do_ip6t_set_ctl+0x2879/0x3740 net/ipv6/netfilter/ip6_tables.c:1636 nf_setsockopt+0x29f/0x2d0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x26d9/0x5430 net/ipv6/ipv6_sockglue.c:1008 __sys_setsockopt+0x4ae/0x880 net/socket.c:2132 __do_sys_setsockopt net/socket.c:2143 [inline] __se_sys_setsockopt net/socket.c:2140 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2140 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 8465: kasan_save_stack mm/kasan/common.c:48 [inline] kasan_set_track+0x3d/0x70 mm/kasan/common.c:56 kasan_set_free_info+0x17/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0x108/0x140 mm/kasan/common.c:422 slab_free_hook mm/slub.c:1544 [inline] slab_free_freelist_hook+0xd6/0x1a0 mm/slub.c:1577 slab_free mm/slub.c:3142 [inline] kfree+0xd1/0x280 mm/slub.c:4124 __vunmap+0x973/0xa20 mm/vmalloc.c:2274 __do_replace+0x7fe/0xa20 net/ipv6/netfilter/ip6_tables.c:1104 do_replace net/ipv6/netfilter/ip6_tables.c:1156 [inline] do_ip6t_set_ctl+0x2879/0x3740 net/ipv6/netfilter/ip6_tables.c:1636 nf_setsockopt+0x29f/0x2d0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x26d9/0x5430 net/ipv6/ipv6_sockglue.c:1008 __sys_setsockopt+0x4ae/0x880 net/socket.c:2132 __do_sys_setsockopt net/socket.c:2143 [inline] __se_sys_setsockopt net/socket.c:2140 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2140 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff88801a123d48 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes to the right of 8-byte region [ffff88801a123d48, ffff88801a123d50) The buggy address belongs to the page: page:00000000f06d4ec8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a123 flags: 0xfff00000000200(slab) raw: 00fff00000000200 ffffea00050e5d00 0000000a0000000a ffff888010441c80 raw: 0000000000000000 0000000000660066 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88801a123c00: fc fa fc fc fc fc fa fc fc fc fc 00 fc fc fc fc ffff88801a123c80: fa fc fc fc fc fa fc fc fc fc fa fc fc fc fc fa >ffff88801a123d00: fc fc fc fc fa fc fc fc fc fa fc fc fc fc fa fc ^ ffff88801a123d80: fc fc fc fa fc fc fc fc fa fc fc fc fc fa fc fc ffff88801a123e00: fc fc fa fc fc fc fc fa fc fc fc fc fa fc fc fc ==================================================================