bond0: mtu less than device minimum ================================================================== BUG: KASAN: use-after-free in xfrm_policy_insert_inexact_list net/xfrm/xfrm_policy.c:1497 [inline] BUG: KASAN: use-after-free in xfrm_policy_inexact_insert+0xcd1/0xee0 net/xfrm/xfrm_policy.c:1202 Read of size 1 at addr ffff88818c55e259 by task syz-executor4/27431 CPU: 1 PID: 27431 Comm: syz-executor4 Not tainted 4.20.0-rc7+ #360 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+0x1d3/0x2c6 lib/dump_stack.c:113 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430 audit: type=1804 audit(1545744451.685:336): pid=27434 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor5" name="/root/syzkaller-testdir244527636/syzkaller.Me05qt/6325/memory.events" dev="sda1" ino=16563 res=1 xfrm_policy_insert_inexact_list net/xfrm/xfrm_policy.c:1497 [inline] xfrm_policy_inexact_insert+0xcd1/0xee0 net/xfrm/xfrm_policy.c:1202 xfrm_policy_insert+0x639/0x850 net/xfrm/xfrm_policy.c:1570 xfrm_add_policy+0x2a0/0x6f0 net/xfrm/xfrm_user.c:1657 xfrm_user_rcv_msg+0x44c/0x8e0 net/xfrm/xfrm_user.c:2663 netlink_rcv_skb+0x16c/0x430 net/netlink/af_netlink.c:2477 xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2671 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x59f/0x750 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2116 __sys_sendmsg+0x11d/0x280 net/socket.c:2154 __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg net/socket.c:2161 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 sysfs: cannot create duplicate filename '/class/ieee80211/â«´ìvE VÕ!' entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457759 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007efcdc3f1c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457759 RDX: 0000000000000000 RSI: 000000002014f000 RDI: 0000000000000007 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007efcdc3f26d4 R13: 00000000004c4a19 R14: 00000000004d8100 R15: 00000000ffffffff Allocated by task 25740: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 __do_kmalloc mm/slab.c:3722 [inline] __kmalloc+0x15b/0x770 mm/slab.c:3731 CPU: 0 PID: 27444 Comm: syz-executor2 Not tainted 4.20.0-rc7+ #360 kmalloc include/linux/slab.h:551 [inline] sock_kmalloc+0x15a/0x1f0 net/core/sock.c:1992 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 af_alg_alloc_areq+0x83/0x280 crypto/af_alg.c:1097 Call Trace: _aead_recvmsg crypto/algif_aead.c:157 [inline] aead_recvmsg+0x49d/0x1ba0 crypto/algif_aead.c:334 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d3/0x2c6 lib/dump_stack.c:113 sock_recvmsg_nosec net/socket.c:794 [inline] sock_recvmsg+0xd0/0x110 net/socket.c:801 sock_read_iter+0x39b/0x570 net/socket.c:878 call_read_iter include/linux/fs.h:1851 [inline] do_iter_readv_writev+0x77c/0xa80 fs/read_write.c:678 sysfs_warn_dup.cold.3+0x1c/0x2b fs/sysfs/dir.c:30 do_iter_read+0x26e/0x650 fs/read_write.c:922 sysfs_do_create_link_sd.isra.2+0x116/0x130 fs/sysfs/symlink.c:50 vfs_readv+0x175/0x1c0 fs/read_write.c:986 sysfs_do_create_link fs/sysfs/symlink.c:79 [inline] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:91 do_readv+0x11a/0x310 fs/read_write.c:1019 device_add_class_symlinks drivers/base/core.c:1691 [inline] device_add+0x64a/0x18e0 drivers/base/core.c:1893 __do_sys_readv fs/read_write.c:1106 [inline] __se_sys_readv fs/read_write.c:1103 [inline] __x64_sys_readv+0x75/0xb0 fs/read_write.c:1103 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 25740: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 wiphy_register+0x1ba9/0x28d0 net/wireless/core.c:875 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3817 __sock_kfree_s net/core/sock.c:2013 [inline] sock_kfree_s+0x29/0x60 net/core/sock.c:2019 af_alg_free_resources+0x6b/0x80 crypto/af_alg.c:1033 _aead_recvmsg crypto/algif_aead.c:321 [inline] aead_recvmsg+0x1330/0x1ba0 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:794 [inline] sock_recvmsg+0xd0/0x110 net/socket.c:801 sock_read_iter+0x39b/0x570 net/socket.c:878 call_read_iter include/linux/fs.h:1851 [inline] do_iter_readv_writev+0x77c/0xa80 fs/read_write.c:678 ieee80211_register_hw+0x15cd/0x40e0 net/mac80211/main.c:1109 do_iter_read+0x26e/0x650 fs/read_write.c:922 vfs_readv+0x175/0x1c0 fs/read_write.c:986 do_readv+0x11a/0x310 fs/read_write.c:1019 __do_sys_readv fs/read_write.c:1106 [inline] __se_sys_readv fs/read_write.c:1103 [inline] __x64_sys_readv+0x75/0xb0 fs/read_write.c:1103 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe mac80211_hwsim_new_radio+0x2025/0x3630 drivers/net/wireless/mac80211_hwsim.c:2921 The buggy address belongs to the object at ffff88818c55e040 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 537 bytes inside of 1024-byte region [ffff88818c55e040, ffff88818c55e440) The buggy address belongs to the page: page:ffffea0006315780 count:1 mapcount:0 mapping:ffff8881da800ac0 index:0xffff88818c55e940 compound_mapcount: 0 flags: 0x2fffc0000010200(slab|head) raw: 02fffc0000010200 ffffea0006db0008 ffffea0006d91688 ffff8881da800ac0 raw: ffff88818c55e940 ffff88818c55e040 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88818c55e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88818c55e180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb hwsim_new_radio_nl+0xd3a/0x14b0 drivers/net/wireless/mac80211_hwsim.c:3469 >ffff88818c55e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ genl_family_rcv_msg+0x8a7/0x11a0 net/netlink/genetlink.c:601 ffff88818c55e280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88818c55e300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================