loop1: detected capacity change from 131116 to 0
==================================================================
BUG: KASAN: use-after-free in squashfs_get_id+0x1bc/0x1f0 fs/squashfs/id.c:38
Read of size 8 at addr ffff88801e83b748 by task syz-executor.1/10438

CPU: 1 PID: 10438 Comm: syz-executor.1 Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:385
 __kasan_report mm/kasan/report.c:545 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:562
 squashfs_get_id+0x1bc/0x1f0 fs/squashfs/id.c:38
 squashfs_new_inode fs/squashfs/inode.c:51 [inline]
 squashfs_read_inode+0x1b4/0x1b40 fs/squashfs/inode.c:120
 squashfs_fill_super+0x1140/0x23b0 fs/squashfs/super.c:310
 get_tree_bdev+0x440/0x760 fs/super.c:1291
 vfs_get_tree+0x89/0x2f0 fs/super.c:1496
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x13ad/0x20c0 fs/namespace.c:3205
 do_mount fs/namespace.c:3218 [inline]
 __do_sys_mount fs/namespace.c:3426 [inline]
 __se_sys_mount fs/namespace.c:3403 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3403
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x460b9a
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:00007f1f90f41a78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f1f90f41b10 RCX: 0000000000460b9a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f1f90f41ad0
RBP: 00007f1f90f41ad0 R08: 00007f1f90f41b10 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020010200

Allocated by task 8819:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
 kmem_cache_alloc_trace+0x15f/0x300 mm/slab.c:3554
 kmalloc include/linux/slab.h:552 [inline]
 batadv_mcast_mla_softif_get_ipv6 net/batman-adv/multicast.c:477 [inline]
 batadv_mcast_mla_softif_get net/batman-adv/multicast.c:536 [inline]
 __batadv_mcast_mla_update net/batman-adv/multicast.c:911 [inline]
 batadv_mcast_mla_update+0x1673/0x2d10 net/batman-adv/multicast.c:948
 process_one_work+0x98d/0x1630 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Freed by task 8819:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56
 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:352
 __kasan_slab_free+0xd8/0x120 mm/kasan/common.c:422
 __cache_free mm/slab.c:3424 [inline]
 kfree+0xed/0x280 mm/slab.c:3760
 batadv_mcast_mla_list_free net/batman-adv/multicast.c:671 [inline]
 __batadv_mcast_mla_update net/batman-adv/multicast.c:926 [inline]
 batadv_mcast_mla_update+0x1227/0x2d10 net/batman-adv/multicast.c:948
 process_one_work+0x98d/0x1630 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

The buggy address belongs to the object at ffff88801e83b740
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 8 bytes inside of
 32-byte region [ffff88801e83b740, ffff88801e83b760)
The buggy address belongs to the page:
page:000000007c5e9779 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801e83bfc1 pfn:0x1e83b
flags: 0xfff00000000200(slab)
raw: 00fff00000000200 ffffea00008e7bc8 ffffea0000571008 ffff888010840100
raw: ffff88801e83bfc1 ffff88801e83b000 000000010000003f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88801e83b600: fa fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88801e83b680: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
>ffff88801e83b700: 00 fc fc fc fc fc fc fc fa fb fb fb fc fc fc fc
                                              ^
 ffff88801e83b780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
 ffff88801e83b800: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
==================================================================