protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 ================================================================== BUG: KASAN: use-after-free in rt_cache_valid+0x158/0x190 net/ipv4/route.c:1513 Read of size 2 at addr ffff88805f3bca0a by task syz-executor.1/31212 CPU: 0 PID: 31212 Comm: syz-executor.1 Not tainted 5.0.0-rc8+ #89 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+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 __asan_report_load2_noabort+0x14/0x20 mm/kasan/generic_report.c:133 rt_cache_valid+0x158/0x190 net/ipv4/route.c:1513 __mkroute_output net/ipv4/route.c:2263 [inline] ip_route_output_key_hash_rcu+0x89d/0x30e0 net/ipv4/route.c:2495 ip_route_output_key_hash+0x212/0x380 net/ipv4/route.c:2324 __ip_route_output_key include/net/route.h:124 [inline] ip_route_connect include/net/route.h:302 [inline] tcp_v4_connect+0x7ec/0x1c40 net/ipv4/tcp_ipv4.c:233 __inet_stream_connect+0x83f/0xea0 net/ipv4/af_inet.c:655 tcp_sendmsg_fastopen net/ipv4/tcp.c:1161 [inline] tcp_sendmsg_locked+0x25b1/0x34a0 net/ipv4/tcp.c:1208 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1443 inet_sendmsg+0x147/0x5d0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:631 __sys_sendto+0x262/0x380 net/socket.c:1786 __do_sys_sendto net/socket.c:1798 [inline] __se_sys_sendto net/socket.c:1794 [inline] __ia32_sys_sendto+0xdf/0x1a0 net/socket.c:1794 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f14869 Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f5d100cc EFLAGS: 00000296 ORIG_RAX: 0000000000000171 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00000000200007fd RDI: 0000000020e68000 RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 30116: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:468 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:503 slab_post_alloc_hook mm/slab.h:440 [inline] slab_alloc mm/slab.c:3388 [inline] kmem_cache_alloc+0x11a/0x6f0 mm/slab.c:3548 getname_flags fs/namei.c:140 [inline] getname_flags+0xd6/0x5b0 fs/namei.c:129 getname+0x1a/0x20 fs/namei.c:211 do_sys_open+0x2c9/0x5d0 fs/open.c:1057 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 30116: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:457 kasan_slab_free+0xe/0x10 mm/kasan/common.c:465 __cache_free mm/slab.c:3494 [inline] kmem_cache_free+0x86/0x260 mm/slab.c:3754 putname+0xef/0x130 fs/namei.c:261 do_sys_open+0x318/0x5d0 fs/open.c:1072 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff88805f3bc440 which belongs to the cache names_cache of size 4096 The buggy address is located 1482 bytes inside of 4096-byte region [ffff88805f3bc440, ffff88805f3bd440) The buggy address belongs to the page: page:ffffea00017cef00 count:1 mapcount:0 mapping:ffff88812c291180 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea000196bd88 ffffea0001918e88 ffff88812c291180 raw: 0000000000000000 ffff88805f3bc440 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88805f3bc900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805f3bc980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805f3bca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805f3bca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805f3bcb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================