Bluetooth: hci1: command 0x0419 tx timeout Bluetooth: hci5: command 0x0419 tx timeout Bluetooth: hci4: command 0x0419 tx timeout Bluetooth: hci2: command 0x0419 tx timeout ================================================================== BUG: KASAN: use-after-free in _netlbl_catmap_getnode+0x254/0x330 net/netlabel/netlabel_kapi.c:578 Read of size 4 at addr ffff8800a5334f00 by task syz-executor.4/12314 CPU: 1 PID: 12314 Comm: syz-executor.4 Not tainted 4.18.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x15a/0x20d lib/dump_stack.c:113 print_address_description.cold.6+0x9/0x244 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold.7+0x242/0x305 mm/kasan/report.c:396 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 _netlbl_catmap_getnode+0x254/0x330 net/netlabel/netlabel_kapi.c:578 netlbl_catmap_walk+0x78/0x260 net/netlabel/netlabel_kapi.c:629 cipso_seq_show+0x155/0x1a0 security/smack/smackfs.c:818 traverse+0x2f6/0x950 fs/seq_file.c:114 seq_lseek+0x122/0x3e0 fs/seq_file.c:337 vfs_llseek fs/read_write.c:300 [inline] ksys_lseek+0xc8/0x150 fs/read_write.c:313 __do_sys_lseek fs/read_write.c:324 [inline] __se_sys_lseek fs/read_write.c:322 [inline] __x64_sys_lseek+0x6e/0xb0 fs/read_write.c:322 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f085aa17188 EFLAGS: 00000246 ORIG_RAX: 0000000000000008 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000100000001 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007fffc737e6ff R14: 00007f085aa17300 R15: 0000000000022000 Allocated by task 12313: save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc.part.1+0x62/0xf0 mm/kasan/kasan.c:553 kasan_kmalloc+0xaf/0xc0 mm/kasan/kasan.c:538 kmem_cache_alloc_trace+0x142/0x350 mm/slub.c:2735 kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:707 [inline] netlbl_catmap_alloc include/net/netlabel.h:331 [inline] _netlbl_catmap_getnode+0x11b/0x330 net/netlabel/netlabel_kapi.c:596 netlbl_catmap_setbit+0x17/0xb0 net/netlabel/netlabel_kapi.c:790 smk_netlbl_mls+0xfe/0x200 security/smack/smack_access.c:506 smk_set_cipso.isra.10+0x3cf/0x540 security/smack/smackfs.c:933 smk_write_cipso+0x14/0x20 security/smack/smackfs.c:960 __vfs_write+0xe3/0x880 fs/read_write.c:485 vfs_write+0x150/0x4f0 fs/read_write.c:549 ksys_write+0xcd/0x1b0 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:607 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 12309: save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x167/0x240 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 slab_free_hook mm/slub.c:1373 [inline] slab_free_freelist_hook mm/slub.c:1400 [inline] slab_free mm/slub.c:2955 [inline] kfree+0x130/0x3b0 mm/slub.c:3908 netlbl_catmap_free include/net/netlabel.h:349 [inline] smk_set_cipso.isra.10+0x444/0x540 security/smack/smackfs.c:935 smk_write_cipso+0x14/0x20 security/smack/smackfs.c:960 __vfs_write+0xe3/0x880 fs/read_write.c:485 vfs_write+0x150/0x4f0 fs/read_write.c:549 ksys_write+0xcd/0x1b0 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:607 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8800a5334f00 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes inside of 64-byte region [ffff8800a5334f00, ffff8800a5334f40) The buggy address belongs to the page: page:ffffea000294cd00 count:1 mapcount:0 mapping:ffff88013fe11600 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 0000000000000000 0000000f00000001 ffff88013fe11600 raw: 0000000000000000 00000000802a002a 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page allocated via order 0, migratetype Unmovable, gfp_mask 0x6012c0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY) set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook mm/page_alloc.c:1906 [inline] prep_new_page mm/page_alloc.c:1914 [inline] get_page_from_freelist+0x2f35/0x46b0 mm/page_alloc.c:3345 __alloc_pages_nodemask+0x39e/0x2780 mm/page_alloc.c:4369 alloc_pages_current+0xd6/0x1b0 mm/mempolicy.c:2093 alloc_pages include/linux/gfp.h:492 [inline] alloc_slab_page mm/slub.c:1440 [inline] allocate_slab mm/slub.c:1585 [inline] new_slab+0x4a9/0x850 mm/slub.c:1656 new_slab_objects mm/slub.c:2419 [inline] ___slab_alloc+0x609/0x940 mm/slub.c:2571 __slab_alloc.isra.22+0x78/0xe0 mm/slub.c:2611 slab_alloc_node mm/slub.c:2674 [inline] __kmalloc_node+0xef/0x530 mm/slub.c:3794 kmalloc_node include/linux/slab.h:555 [inline] kvmalloc_node+0x68/0x70 mm/util.c:423 kvmalloc include/linux/mm.h:576 [inline] kvzalloc include/linux/mm.h:584 [inline] allocate_hook_entries_size+0x30/0x70 net/netfilter/core.c:60 nf_hook_entries_grow+0x3eb/0x860 net/netfilter/core.c:127 __nf_register_net_hook+0x117/0x340 net/netfilter/core.c:336 nf_register_net_hook+0x45/0xb0 net/netfilter/core.c:463 nf_register_net_hooks+0x44/0xa0 net/netfilter/core.c:479 arpt_register_table+0x203/0x2b0 net/ipv4/netfilter/arp_tables.c:1561 arptable_filter_table_init.part.0+0x3f/0x60 net/ipv4/netfilter/arptable_filter.c:52 arptable_filter_table_init+0x3d/0x50 net/ipv4/netfilter/arptable_filter.c:56 Memory state around the buggy address: ffff8800a5334e00: fb fb fb fb fc fc fc fc fb fb fb fb fb fb fb fb ffff8800a5334e80: fc fc fc fc fb fb fb fb fb fb fb fb fc fc fc fc >ffff8800a5334f00: fb fb fb fb fb fb fb fb fc fc fc fc fb fb fb fb ^ ffff8800a5334f80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff8800a5335000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================