loop2: detected capacity change from 8 to 0 ================================================================== BUG: KASAN: slab-out-of-bounds in squashfs_get_id+0x1bc/0x1f0 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/squashfs/id.c:38 Read of size 8 at addr ffff88801cccdaa0 by task syz-executor.2/27303 CPU: 1 PID: 27303 Comm: syz-executor.2 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2c6 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/mm/kasan/report.c:230 __kasan_report syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/mm/kasan/report.c:396 [inline] kasan_report.cold+0x79/0xd5 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/mm/kasan/report.c:413 squashfs_get_id+0x1bc/0x1f0 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/squashfs/id.c:38 squashfs_new_inode syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/squashfs/inode.c:51 [inline] squashfs_read_inode+0x1b4/0x1b40 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/squashfs/inode.c:120 squashfs_fill_super+0x1140/0x23b0 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/squashfs/super.c:310 get_tree_bdev+0x440/0x760 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/super.c:1291 vfs_get_tree+0x89/0x2f0 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/super.c:1496 do_new_mount syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/namespace.c:2881 [inline] path_mount+0x13ad/0x20c0 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/namespace.c:3211 do_mount syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/namespace.c:3224 [inline] __do_sys_mount syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/namespace.c:3432 [inline] __se_sys_mount syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/namespace.c:3409 [inline] __x64_sys_mount+0x27f/0x300 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/fs/namespace.c:3409 do_syscall_64+0x2d/0x70 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 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:00007f3bbb9d5fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000046702a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f3bbb9d6000 RBP: 00007f3bbb9d6040 R08: 00007f3bbb9d6040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f3bbb9d6000 R15: 0000000020010300 Allocated by task 8451: kasan_save_stack+0x1b/0x40 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/mm/kasan/common.c:38 kasan_set_track syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/mm/kasan/common.c:46 [inline] set_alloc_info syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/mm/kasan/common.c:401 [inline] ____kasan_kmalloc.constprop.0+0x7f/0xa0 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/mm/kasan/common.c:429 kmalloc_node syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/./include/linux/slab.h:575 [inline] kvmalloc_node+0x61/0xf0 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/mm/util.c:587 xt_jumpstack_alloc syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/net/netfilter/x_tables.c:1323 [inline] xt_replace_table+0x195/0x600 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/net/netfilter/x_tables.c:1369 __do_replace+0x1d7/0x8c0 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/net/ipv6/netfilter/ip6_tables.c:1083 do_replace syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/net/ipv4/netfilter/arp_tables.c:984 [inline] do_arpt_set_ctl+0xad8/0xea0 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/net/ipv4/netfilter/arp_tables.c:1418 nf_setsockopt+0x83/0xe0 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x3c3/0x3a20 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/net/ipv4/ip_sockglue.c:1435 tcp_setsockopt+0x136/0x2440 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/net/ipv4/tcp.c:3598 __sys_setsockopt+0x2db/0x610 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/net/socket.c:2115 __do_sys_setsockopt syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/net/socket.c:2126 [inline] __se_sys_setsockopt syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/net/socket.c:2123 [inline] __x64_sys_setsockopt+0xba/0x150 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/net/socket.c:2123 do_syscall_64+0x2d/0x70 syzkaller/managers/upstream-kasan-gce-selinux-root/kernel/arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff88801cccda80 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes to the right of 32-byte region [ffff88801cccda80, ffff88801cccdaa0) The buggy address belongs to the page: page:00000000cd3f53e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801cccdfc1 pfn:0x1cccd flags: 0xfff00000000200(slab) raw: 00fff00000000200 ffffea0000956dc8 ffffea00004a6c48 ffff888010c40100 raw: ffff88801cccdfc1 ffff88801cccd000 0000000100000035 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88801cccd980: fa fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff88801cccda00: fb fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc >ffff88801cccda80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff88801cccdb00: fa fb fb fb fc fc fc fc 00 00 01 fc fc fc fc fc ffff88801cccdb80: fa fb fb fb fc fc fc fc 00 00 01 fc fc fc fc fc ==================================================================