KASAN: use-after-free Read in enqueue_to

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	KASAN: use-after-free Write in enqueue_to_backlog				1	830d	830d	0/1	auto-closed as invalid on 2022/05/13 14:52

==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:71 [inline]
BUG: KASAN: use-after-free in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
BUG: KASAN: use-after-free in netif_running include/linux/netdevice.h:3500 [inline]
BUG: KASAN: use-after-free in enqueue_to_backlog+0xa1/0xbf0 net/core/dev.c:4671
Read of size 8 at addr ffff888041298038 by task syz-executor.5/26062

CPU: 0 PID: 26062 Comm: syz-executor.5 Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description.constprop.0.cold+0xeb/0x495 mm/kasan/report.c:313
 print_report mm/kasan/report.c:429 [inline]
 kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
 netif_running include/linux/netdevice.h:3500 [inline]
 enqueue_to_backlog+0xa1/0xbf0 net/core/dev.c:4671
 netif_rx_internal+0x10a/0x5f0 net/core/dev.c:4953
 netif_rx+0xa5/0x5a0 net/core/dev.c:5006
 dev_loopback_xmit+0x22b/0x660 net/core/dev.c:3932
 ip_mc_finish_output+0x1dc/0x5a0 net/ipv4/ip_output.c:355
 NF_HOOK include/linux/netfilter.h:307 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip_mc_output+0x51b/0x700 net/ipv4/ip_output.c:410
 dst_output include/net/dst.h:451 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 ip_send_skb+0xd4/0x260 net/ipv4/ip_output.c:1593
 udp_send_skb+0x725/0x1430 net/ipv4/udp.c:967
 udp_sendmsg+0x1bee/0x2760 net/ipv4/udp.c:1254
 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:734
 ____sys_sendmsg+0x334/0x810 net/socket.c:2485
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2539
 __sys_sendmmsg+0x18b/0x460 net/socket.c:2625
 __do_sys_sendmmsg net/socket.c:2654 [inline]
 __se_sys_sendmmsg net/socket.c:2651 [inline]
 __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2651
 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+0x63/0xcd
RIP: 0033:0x7f02bf289279
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f02c0302168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f02bf39c050 RCX: 00007f02bf289279
RDX: 0400000000000695 RSI: 0000000020007fc0 RDI: 0000000000000003
RBP: 00007f02bf2e3189 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f02bf8cfb1f R14: 00007f02c0302300 R15: 0000000000022000
 </TASK>

Allocated by task 3660:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 ____kasan_kmalloc mm/kasan/common.c:516 [inline]
 ____kasan_kmalloc mm/kasan/common.c:475 [inline]
 __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525
 kmalloc_node include/linux/slab.h:623 [inline]
 kvmalloc_node+0x3e/0x190 mm/util.c:613
 kvmalloc include/linux/slab.h:750 [inline]
 kvzalloc include/linux/slab.h:758 [inline]
 alloc_netdev_mqs+0x98/0x1180 net/core/dev.c:10584
 rtnl_create_link+0x9d7/0xc00 net/core/rtnetlink.c:3241
 rtnl_newlink_create net/core/rtnetlink.c:3353 [inline]
 __rtnl_newlink+0xf8f/0x17e0 net/core/rtnetlink.c:3580
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3593
 rtnetlink_rcv_msg+0x43a/0xc90 net/core/rtnetlink.c:6089
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2501
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:734
 __sys_sendto+0x236/0x340 net/socket.c:2120
 __do_sys_sendto net/socket.c:2132 [inline]
 __se_sys_sendto net/socket.c:2128 [inline]
 __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2128
 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+0x63/0xcd

Freed by task 26052:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track+0x21/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:367 [inline]
 ____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:329
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1754 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1780
 slab_free mm/slub.c:3534 [inline]
 kfree+0xe2/0x4d0 mm/slub.c:4562
 kvfree+0x42/0x50 mm/util.c:655
 device_release+0x9f/0x240 drivers/base/core.c:2241
 kobject_cleanup lib/kobject.c:673 [inline]
 kobject_release lib/kobject.c:704 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1c8/0x540 lib/kobject.c:721
 netdev_run_todo+0x75e/0x10f0 net/core/dev.c:10366
 vlan_ioctl_handler+0x1a5/0xec0 net/8021q/vlan.c:654
 sock_ioctl+0x1d8/0x640 net/socket.c:1250
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
 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+0x63/0xcd

The buggy address belongs to the object at ffff888041298000
 which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 56 bytes inside of
 4096-byte region [ffff888041298000, ffff888041299000)

The buggy address belongs to the physical page:
page:ffffea000104a600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x41298
head:ffffea000104a600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff88801184c280
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3660, tgid 3660 (syz-executor.5), ts 155436348140, free_ts 11182257309
 prep_new_page mm/page_alloc.c:2457 [inline]
 get_page_from_freelist+0x1298/0x3b80 mm/page_alloc.c:4203
 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5431
 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2272
 alloc_slab_page mm/slub.c:1824 [inline]
 allocate_slab+0x26c/0x3c0 mm/slub.c:1969
 new_slab mm/slub.c:2029 [inline]
 ___slab_alloc+0x99f/0xe10 mm/slub.c:3031
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3118
 slab_alloc_node mm/slub.c:3209 [inline]
 __kmalloc_node+0x33e/0x4a0 mm/slub.c:4468
 kmalloc_node include/linux/slab.h:623 [inline]
 kvmalloc_node+0x3e/0x190 mm/util.c:613
 kvmalloc include/linux/slab.h:750 [inline]
 kvzalloc include/linux/slab.h:758 [inline]
 alloc_netdev_mqs+0x98/0x1180 net/core/dev.c:10584
 rtnl_create_link+0x9d7/0xc00 net/core/rtnetlink.c:3241
 rtnl_newlink_create net/core/rtnetlink.c:3353 [inline]
 __rtnl_newlink+0xf8f/0x17e0 net/core/rtnetlink.c:3580
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3593
 rtnetlink_rcv_msg+0x43a/0xc90 net/core/rtnetlink.c:6089
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2501
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1371 [inline]
 free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1421
 free_unref_page_prepare mm/page_alloc.c:3344 [inline]
 free_unref_page+0x19/0x6a0 mm/page_alloc.c:3439
 free_contig_range+0xb1/0x180 mm/page_alloc.c:9319
 destroy_args+0xa8/0x646 mm/debug_vm_pgtable.c:1031
 debug_vm_pgtable+0x2a03/0x2a94 mm/debug_vm_pgtable.c:1354
 do_one_initcall+0x103/0x650 init/main.c:1296
 do_initcall_level init/main.c:1369 [inline]
 do_initcalls init/main.c:1385 [inline]
 do_basic_setup init/main.c:1404 [inline]
 kernel_init_freeable+0x6b1/0x73a init/main.c:1611
 kernel_init+0x1a/0x1d0 init/main.c:1500
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Memory state around the buggy address:
 ffff888041297f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888041297f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888041298000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888041298080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888041298100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Manager	Title
2022/08/10 10:29	upstream	200e340f2196	c2a623d6	.config	console log	report	info	ci-upstream-kasan-gce	KASAN: use-after-free Read in enqueue_to_backlog
2022/07/20 02:56	upstream	ca85855bdcae	775344bc	.config	console log	report	info	ci-upstream-kasan-gce	KASAN: use-after-free Read in enqueue_to_backlog
2022/07/17 22:51	upstream	55ea9bd66688	95cb00d1	.config	console log	report	info	ci-upstream-kasan-gce-selinux-root	KASAN: use-after-free Read in enqueue_to_backlog
2022/06/30 03:22	upstream	d9b2ba67917c	1434eec0	.config	console log	report	info	ci-upstream-kasan-gce-root	KASAN: use-after-free Read in enqueue_to_backlog
2022/04/30 21:32	net-old	a9384a4c1d25	2df221f6	.config	console log	report	info	ci-upstream-net-this-kasan-gce	KASAN: use-after-free Read in enqueue_to_backlog
2022/08/20 09:14	net-next-old	917edfb98c48	26a13b38	.config	console log	report	info	ci-upstream-net-kasan-gce	KASAN: use-after-free Read in enqueue_to_backlog