================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/fortify-string.h:225 [inline] BUG: KASAN: slab-out-of-bounds in usb_hcd_poll_rh_status+0x376/0x780 drivers/usb/core/hcd.c:774 Write of size 2 at addr ffff888177aeecd0 by task kworker/u4:7/8958 CPU: 1 PID: 8958 Comm: kworker/u4:7 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:450 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 memcpy+0x39/0x60 mm/kasan/shadow.c:66 memcpy include/linux/fortify-string.h:225 [inline] usb_hcd_poll_rh_status+0x376/0x780 drivers/usb/core/hcd.c:774 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734 __run_timers kernel/time/timer.c:1715 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5605 Code: 76 a5 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc90018647ba0 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff920030c8f76 RCX: 95d119111322ed5a RDX: 1ffff1100394b88b RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ff75a07 R10: fffffbfff1feeb40 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff8bb83b60 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:268 [inline] rcu_read_lock include/linux/rcupdate.h:688 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:723 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Allocated by task 18391: kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] ____kasan_kmalloc mm/kasan/common.c:472 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:522 kmalloc include/linux/slab.h:595 [inline] proc_do_submiturb+0x2a7d/0x3630 drivers/usb/core/devio.c:1816 proc_submiturb drivers/usb/core/devio.c:1975 [inline] usbdev_do_ioctl drivers/usb/core/devio.c:2671 [inline] usbdev_ioctl+0x692/0x36c0 drivers/usb/core/devio.c:2791 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff888177aeecd0 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes inside of 8-byte region [ffff888177aeecd0, ffff888177aeecd8) The buggy address belongs to the page: page:ffffea0005debb80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x177aee flags: 0x57ff00000000200(slab|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000000200 0000000000000000 dead000000000001 ffff888010c41280 raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 10810, ts 1785869614669, free_ts 1785869485485 prep_new_page mm/page_alloc.c:2418 [inline] get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4149 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369 alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191 alloc_slab_page mm/slub.c:1793 [inline] allocate_slab mm/slub.c:1930 [inline] new_slab+0x32d/0x4a0 mm/slub.c:1993 ___slab_alloc+0x918/0xfe0 mm/slub.c:3022 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3109 slab_alloc_node mm/slub.c:3200 [inline] __kmalloc_node+0x2cb/0x390 mm/slub.c:4467 kmalloc_node include/linux/slab.h:613 [inline] __vmalloc_area_node mm/vmalloc.c:2940 [inline] __vmalloc_node_range+0x473/0xab0 mm/vmalloc.c:3065 __vmalloc_node mm/vmalloc.c:3114 [inline] vzalloc+0x67/0x80 mm/vmalloc.c:3184 xt_counters_alloc+0x4c/0x70 net/netfilter/x_tables.c:1379 __do_replace+0x9a/0x890 net/ipv6/netfilter/ip6_tables.c:1066 do_replace net/ipv6/netfilter/ip6_tables.c:1157 [inline] do_ip6t_set_ctl+0x90d/0xb90 net/ipv6/netfilter/ip6_tables.c:1639 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x122/0x180 net/ipv6/ipv6_sockglue.c:1017 tcp_setsockopt+0x136/0x2520 net/ipv4/tcp.c:3653 __sys_setsockopt+0x2db/0x610 net/socket.c:2176 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3309 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3388 __vunmap+0x781/0xb70 mm/vmalloc.c:2632 __vfree+0x3c/0xd0 mm/vmalloc.c:2680 vfree+0x5a/0x90 mm/vmalloc.c:2711 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:884 [inline] get_entries net/ipv6/netfilter/ip6_tables.c:1041 [inline] do_ip6t_get_ctl+0x82f/0xa10 net/ipv6/netfilter/ip6_tables.c:1672 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 ipv6_getsockopt+0x1be/0x270 net/ipv6/ipv6_sockglue.c:1495 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:4249 __sys_getsockopt+0x21f/0x5f0 net/socket.c:2220 __do_sys_getsockopt net/socket.c:2235 [inline] __se_sys_getsockopt net/socket.c:2232 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:2232 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Memory state around the buggy address: ffff888177aeeb80: fc fc fb fc fc fc fc fb fc fc fc fc 00 fc fc fc ffff888177aeec00: fc 00 fc fc fc fc 00 fc fc fc fc 00 fc fc fc fc >ffff888177aeec80: fb fc fc fc fc 00 fc fc fc fc 01 fc fc fc fc fb ^ ffff888177aeed00: fc fc fc fc fb fc fc fc fc fb fc fc fc fc fb fc ffff888177aeed80: fc fc fc fa fc fc fc fc fb fc fc fc fc fb fc fc ================================================================== ---------------- Code disassembly (best guess): 0: 76 a5 jbe 0xffffffa7 2: 7e 83 jle 0xffffff87 4: f8 clc 5: 01 0f add %ecx,(%rdi) 7: 85 b4 02 00 00 9c 58 test %esi,0x589c0000(%rdx,%rax,1) e: f6 c4 02 test $0x2,%ah 11: 0f 85 9f 02 00 00 jne 0x2b6 17: 48 83 7c 24 08 00 cmpq $0x0,0x8(%rsp) 1d: 74 01 je 0x20 1f: fb sti 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 48 01 c3 add %rax,%rbx <-- trapping instruction 2d: 48 c7 03 00 00 00 00 movq $0x0,(%rbx) 34: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx) 3b: 00 3c: 48 rex.W 3d: 8b .byte 0x8b 3e: 84 .byte 0x84 3f: 24 .byte 0x24